WO2006001543A1 - 記録方法、インクカートリッジ及び画像形成方法 - Google Patents
記録方法、インクカートリッジ及び画像形成方法 Download PDFInfo
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- WO2006001543A1 WO2006001543A1 PCT/JP2005/012289 JP2005012289W WO2006001543A1 WO 2006001543 A1 WO2006001543 A1 WO 2006001543A1 JP 2005012289 W JP2005012289 W JP 2005012289W WO 2006001543 A1 WO2006001543 A1 WO 2006001543A1
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- Prior art keywords
- water
- ink
- recording
- based ink
- mass
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/21—Ink jet for multi-colour printing
- B41J2/2107—Ink jet for multi-colour printing characterised by the ink properties
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/40—Ink-sets specially adapted for multi-colour inkjet printing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/54—Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
Definitions
- the present invention relates to a recording method using a water-based ink containing a water-insoluble colorant, an ink force trough, and an image forming method.
- an ink composed of self-dispersing carbon black and a specific salt see, for example, JP 2000-198955 A.
- an ink composition for ink jet recording comprising a pigment, polymer fine particles, a water-soluble organic solvent and water and a polyvalent metal salt-containing aqueous solution are attached to a recording medium, and the ink composition and the polyvalent metal salt aqueous solution.
- a technique for forming a high-quality image by reacting with see, for example, Japanese Patent Laid-Open No. 2000-63719.
- the pigment existing in a dispersed state in the ink is forcibly agglomerated on the surface of the recording medium to suppress the penetration of the pigment into the recording medium, thereby obtaining a high-density image.
- an object of the present invention is to provide a sufficiently high area factor even in a small ink droplet amount in a portion where the image density is relatively high, and an image with a high image density can be obtained. It is an object of the present invention to provide a recording method capable of reducing graininess in a portion where the image density is relatively low.
- Another object of the present invention is to provide a recording medium with a water-based ink containing a water-insoluble color material, and to disperse the water-insoluble color material in the water-based ink by contacting the water-based ink.
- An image forming method comprising the step of applying a destabilizing reaction liquid to a recording medium (hereinafter sometimes referred to as a two-liquid system) T JP2005 / 012289
- an image having a sufficiently large area factor and a high image density can be obtained even with a small amount of ink droplets compared to an image obtained with a conventional two-liquid system. It is an object of the present invention to provide a recording method that can be obtained and can reduce graininess.
- Another object of the present invention is to provide an ink cartridge that can be suitably used in the recording method.
- Another object of the present invention is to effectively suppress color mixing (bleeding) at the boundary between color images when color image recording is performed in which different color areas are adjacent to plain paper.
- An object of the present invention is to provide an image forming method that can be used.
- the recording method according to the present invention uses the first water-based ink when performing relatively high density recording, and uses the second water-based ink when performing relative density recording.
- the first water-based ink contains at least water, a water-insoluble colorant, and a plurality of water-soluble organic solvents, and the plurality of water-soluble organic solvents are good solvents for the water-insoluble colorant.
- a poor solvent for the water-insoluble colorant, and the total content of the good solvent is A (mass%) and the total content of the poor solvent is B (mass%) with respect to the total mass of the aqueous ink.
- B / A in the second water-based ink is a value smaller than B / A in the first water-based ink, and the second water-based ink has the same hue as the first water-based ink. It is characterized by having.
- the recording method includes: (i) a step of applying a water-based ink containing a water-insoluble colorant to a recording medium; and (ii) a step of contacting the water-based ink with the water-based ink.
- the recording method comprising the step of applying to the recording medium a reaction solution that makes the dissolved or dispersed state of the water-insoluble colorant unstable, the first aqueous ink is used when recording at a relatively high concentration.
- the second aqueous ink is used, and the first aqueous ink is small.
- water, a water-insoluble colorant, a good solvent for the water-insoluble colorant and a poor solvent for the water-insoluble colorant, and the total content of the good solvent relative to the total weight of the water-based ink is A (mass% )
- the poor solvent content is B (% by mass)
- B / A in the second aqueous ink is smaller than BZA in the first aqueous ink
- the second water-based ink has the same hue as the first water-based ink.
- the recording method uses the first aqueous ink when recording at a relatively high density and uses the second aqueous ink when recording at a relatively low density.
- the first aqueous ink force contains at least water, a water-insoluble coloring material, and a plurality of water-soluble organic solvents, and the plurality of water-soluble organic solvents contain the water-insoluble coloring material.
- the total content of the good solvent is A (mass%) and the total content of the poor solvent is B (mass%) with respect to the total mass of the water-based ink.
- B / A in the second water-based ink is smaller than B / A in the first water-based ink, and the second water-based ink is the first water-based ink.
- the water-soluble organic solvent showing the maximum Ka value among the Ka values of each of the plurality of water-soluble organic solvents is the poor solvent, and the poor solvent is recorded prior to the good solvent. Penetration of the water-insoluble colorant in the good solvent on the surface of the recording medium is facilitated by penetrating into the medium.
- an ink cartridge is an ink cartridge including an ink storage portion that stores ink, wherein the ink is the first aqueous ink or the second aqueous ink configured as described above. It is characterized by being.
- an image forming method is an image forming method in which black ink and at least one color ink are used for recording on a recording medium by an ink jet recording method.
- An image formed by the black ink, and a color ink are used for recording on a recording medium by an ink jet recording method.
- An image formed by the black ink, and a color ink are used for recording on a recording medium by an ink jet recording method.
- An image formed by the black ink, and a color ink When forming an image that is adjacent to the image formed by, a scan that applies black ink is performed to form an image, and then a color ink is applied to the area where the image is formed. It is characterized by performing.
- a portion having a relatively high image density has a sufficiently large area factor even with a small ink droplet amount, and an image with a high image density can be obtained.
- a portion where the image density is relatively low it is possible to provide a recording method capable of reducing graininess.
- the image forming method including the step of applying to the recording medium a reaction liquid that destabilizes the dispersion state of the above, by using the recording method having the above configuration, an image obtained by a conventional two-liquid system can be obtained. Even with a small amount of ink droplets, an image having a sufficiently large area factor and high image density can be obtained, and a recording method capable of reducing graininess can be provided. Furthermore, according to another embodiment of the present invention, it is possible to provide an ink cartridge that can be suitably used in the above recording method.
- FIG. 1 is a schematic sectional side view showing an example of an ink jet recording apparatus.
- FIG. 2 is a front sectional view of a reaction liquid remaining amount display section provided in the ink jet recording apparatus of FIG.
- FIG. 3 is a schematic cross-sectional side view showing a state where the reaction liquid is replenished in the ink jet recording apparatus of FIG.
- FIG. 4 is a schematic perspective view showing an example of an ink jet recording apparatus.
- FIG. 5 is a longitudinal sectional view showing an example of the ink cartridge.
- Figure 6 is a schematic plan view showing a state where the ink cartridge is mounted on the head to recording 0 ⁇
- FIG. 7 is a diagram illustrating an example of the configuration of the recording head.
- FIG. 8 is a diagram illustrating an example of the configuration of the recording head.
- FIG. 9 is a diagram illustrating an example of the configuration of the recording head.
- FIG. 10 is a diagram showing an example of the configuration of the recording head.
- FIG. 11 is a diagram showing an example of the configuration of the recording head.
- FIG. 12 is a diagram showing an example of the configuration of the recording head.
- 13A1, 13A2, 13B1, 13B2, 13C1, 13C2, 13D1, and 13D2 are explanatory diagrams for schematically explaining how ink droplets land on the surface of a recording medium. is there.
- FIGS. 14AA, 14AB, 14AC, 14AD, 14BA, 14BB, 14BC, and 14BD are explanatory diagrams for schematically explaining how ink droplets land on the surface of a recording medium.
- FIGS. 15AB, 15AD, 15BB, and 15BD are explanatory diagrams for schematically explaining the state when ink droplets have landed on the surface of the recording medium.
- the poor solvent and the good solvent in the present invention will be described. Although the details of the definition will be described later, the dispersion stability of the water-insoluble colorant in the water-soluble organic solvent is good regardless of the dispersion method of the permanently insoluble colorant used as the colorant. The bad one is the poor solvent.
- the first water-based ink according to the present invention is characterized by focusing on the water-soluble organic solvent contained in the water-based ink together with the water-insoluble color material, and dissolving or dispersing the water-insoluble color material.
- the water-soluble organic solvent having a function as described above is classified into those exhibiting behavior as a poor solvent and those exhibiting behavior as a good solvent with respect to the water-insoluble colorant.
- the ink is designed so that the ratio of the poor solvent to the good solvent is adjusted within a specific range.
- the ratio of the poor solvent to the good solvent is adjusted so as to be within a specific range, an ink having a larger area factor and a higher image density can be obtained as compared with the conventional ink.
- the ink if used alone, it may be highlighted depending on the recording medium.
- the graininess of the toe part may be conspicuous.
- the ink having the above characteristics is applied to the two-component system, it has been found that the graininess of the image is more conspicuous in a portion having a relatively low image density such as a highlight portion.
- the present inventors have made various studies in order to solve the above problems.
- the first water-based ink used when recording at a relatively high density and the second water-based ink used when recording at a relatively low density are used.
- Ink is used in combination, and the ratio of the good solvent to the poor solvent contained in the aqueous ink is set within a specific range, thereby controlling the ink bleeding rate after the ink is applied to the recording medium.
- the density is relatively high, an image having a sufficiently large area factor and a high image density can be obtained even with a small amount of applied ink.
- the present invention has been achieved.
- the first water-based ink according to the present invention contains at least water, a water-insoluble colorant, and a plurality of water-soluble organic solvents, and the plurality of water-soluble organic solvents are a good solvent and a poor solvent for the water-insoluble colorant.
- water, a plurality of water-soluble organic solvents including a good solvent and a poor solvent for water-insoluble coloring materials, and a water-insoluble coloring material are mixed in a predetermined ratio to be water-insoluble. Dispersion stability of the coloring material is maintained.
- the first water-based ink according to the present invention may have the same configuration as that of a conventional water-based ink containing a water-insoluble colorant except that the water-soluble organic solvent has the specific configuration described above. Yes.
- printing is performed on a recording medium coated with a reaction liquid, using the water-based ink having the above-described configuration.
- the water-based ink having the above-described configuration.
- the first water-based ink according to the present invention is printed on a recording medium, particularly plain paper, for the reasons described below, it is possible to provide a very excellent image density and print quality. Conceivable. That is, as shown in FIGS. 1 3 A 1 to 1 3 D 2, when the ink droplets according to the present invention are printed on a recording medium such as plain paper, from the moment of landing on the ink recording medium.
- the ratios of the water in the ink, the good solvent and the poor solvent to the water-insoluble color material, and the water-insoluble color material change. That is, after the ink droplet 1 3 0 1 shown in FIG.
- FIGS. 1 3 B 1 to 1 3 D 2 are schematic views showing the state of ink from when the ink 1 3 0 1 lands on the recording medium 1 3 0 0 until it is fixed later.
- the concentration of the poor solvent is higher at the outer periphery 1 3 0 2 of the dot at the contact portion ⁇ ⁇ ⁇ of the ink and paper than at the center 1 3 0 3 of the dot. It is thought that there is.
- the ink dots diffuse in the form of a perfect circle near the surface of the recording medium, and in the process of diffusion, the concentration of the poor solvent 1 3 0 7 suddenly increases with respect to the water-insoluble colorant 1 3 0 4. To increase. Along with this, the dispersion of the water-insoluble colorant 1 3 0 4 is rapidly destabilized, and the water-insoluble colorant aggregates or breaks down.
- the second water-based ink according to the present invention contains at least water, a water-insoluble colorant, and a water-soluble organic solvent, and the water-soluble organic solvent is a good solvent for the water-insoluble colorant, and B ZA in the second aqueous ink, where A is the total content (mass%) of the good solvent and B is the total content (mass%) of the poor solvent, relative to the total mass of the aqueous ink of 1. Is a value smaller than B ZA in the first water-based ink, and the second water-based ink has the same hue as that of the first water-based ink.
- the second aqueous ink according to the present invention may have the same configuration as that of a conventional aqueous ink containing a water-insoluble colorant, except that the water-soluble organic solvent has the specific configuration described above.
- the second water-based ink must have the same hue as the first water-based ink.
- the same hue in the present invention means, for example, cyan ink and light cyan ink, magenta ink and light magenta ink, black ink and sag ink.
- the present invention is not limited to this. Further, a combination of inks having substantially the same color material concentration in the first water-based ink and the second water-based ink may be used.
- printing is performed on a recording medium coated with a reaction liquid using the water-based ink having the above-described configuration.
- the ink bleeding rate is increased, and the graininess can be reduced more effectively than the conventional two-liquid system.
- FIGS. 14 A A to 14 80 and FIGS. 15 A B to 15 B D are schematic diagrams showing the process from the landing of the first water-based ink on the recording medium to the fixing thereof.
- Fig. 14 AA to 14 AD are schematic diagrams showing the process from the landing of the first water-based ink on the recording medium to the fixing thereof.
- Fig. 1 3 A 1 to 1 3 D 2 As explained. That is, when the ink lands on the recording medium, the dispersion of the water-insoluble color material becomes unstable in the process of diffusing the ink dot, and the water-insoluble raw color material aggregates or breaks down.
- the water-insoluble colorant may stay on the surface of the recording medium, as if a water-insoluble colorant bank was formed on the outer edge of the dot. In this way, water-insoluble colorant dots are formed into a perfect circle and are fixed on the surface of the recording medium in that state.
- FIGS. 14 8 to 14 BD are schematic diagrams showing a process from when the second water-based ink is landed on the recording medium to fixing.
- the ratio of the total content (% by mass) of the poor solvent to the total content (% by mass) of the good solvent in the ink is smaller in the second water-based ink. Therefore, after the second water-based ink has landed on the recording medium, the degree to which the water-insoluble colorant aggregates or disperses in the process of spreading the ink dots is smaller than that of the first water-based ink. For this reason, the water-insoluble colorant spreads as the water-soluble organic solvent and water diffuse radially.
- the second water-based ink is compared with the first water-based ink. The bleeding rate in the case becomes larger.
- the good solvent and the poor solvent used in the present invention can maintain the dispersion state of the water-insoluble colorant satisfactorily, that is, the relationship with the water-insoluble colorant or the dispersant thereof. To be determined. Therefore, when the good solvent and the poor solvent are selected in the preparation of the ink according to the present invention, it is preferable to determine the stability of the dispersion state of the water-insoluble colorant to be used and obtain the result. As a result of various studies on the criteria for determining good and poor solvents that bring about the effects of the present invention in relation to the effects of the present invention, the present inventors have found that the following determination methods are effective. I found it.
- a water-insoluble colorant dispersion containing 50% by mass of a water-soluble organic solvent to be determined and 45% by mass of water and 5% by mass of a water-insoluble colorant used in the ink in a dispersed state To prepare. Then, when the prepared dispersion is stored at 60 ° C. for 48 hours, the water-insoluble colorant in the liquid has an average particle diameter of 5% by mass, and 95% by mass of water. %, The average particle size of the water-insoluble colorant in the dispersion is the same, or What decreased was defined as a good solvent.
- the following method was used to determine whether the water-soluble organic solvent used was a good solvent or a poor solvent for a certain insoluble colorant.
- the following water-soluble organic solvents are included, Two types of dispersions are prepared: a dispersion A of a soluble coloring material and an aqueous dispersion B of the water-insoluble coloring material.
- Dispersion A The concentration of the water-soluble organic solvent to be determined is 50% by mass, the concentration of the water-insoluble coloring material, or the total concentration of the water-insoluble coloring material and the substance that contributes to its dispersion is 5% by mass, water.
- Aqueous dispersion B Water-insoluble colorant concentration, or 'water-insoluble colorant and the total amount of substances contributing to its dispersion is 5% by mass, and the water concentration is 95% by mass. Water dispersion of sexual coloring material.
- the dispersion A was stored at 60 ° C. for 48 hours and then cooled to room temperature, and the average particle size of the water-insoluble colorant of dispersion A was measured using a concentrated particle size analyzer (trade name: FPAR-1 0 0 0; manufactured by Otsuka Electronics Co., Ltd.) and the like.
- the aqueous dispersion B was measured for the average particle size of the water-insoluble colorant in a state where it was not warmed and stored using a concentrated particle size analyzer in the same manner as described above.
- the water-soluble organic solvent having the largest Ka value is a poor solvent.
- the image forming mechanism described above is effectively developed Is preferable.
- the Ka value obtained by the Bristow method is explained. This value is used as a measure for the penetration of liquid into a recording medium 1 "life.
- ink will be described as an example.
- Ink permeability is expressed as ink amount V per m 2 .
- V Vr + Ka (t-twf Formula 2 (1)
- the Ka value according to the Bristow method in the present invention is PB paper used for plain paper (for example, a copier or page printer (laser beam printer) using an electronic photo system, or a printer using an ink jet recording system). (Canon) and PPC paper (copier paper using an electrophotographic method) as a recording medium.
- the measurement environment is assumed to be a normal office environment such as a temperature of 20 ° C to 25 ° C and a humidity of 40% to 60%.
- the ratio of the poor solvent and the good solvent to the water-insoluble colorant contained in each ink should be defined as described above.
- the image density is relatively high, there is a sufficiently large area factor even with a small amount of ink droplets, and a high image density and image can be obtained.
- an image with reduced graininess can be formed.
- the contents of the good solvent and the poor solvent in the first aqueous ink and the second aqueous ink in the first aqueous ink and the second aqueous ink were found that the smaller the difference in the content ratio, the better the effect of expressing excellent gradation.
- the total content of the good solvent is A (mass%) and the total content of the poor solvent is B (mass%) with respect to the total mass of each water-based ink
- the most important feature of the present invention is that, as described above, the ink bleeding rate on the recording medium is changed by the quantitative relationship between the good solvent and the poor solvent with respect to the water-insoluble colorant in the water-based ink.
- the second water-based ink and the second water-based ink are used, and the water-based ink is selectively used according to the image density.
- the first water-based ink and the second water-based ink according to the present invention require that the water-soluble organic solvent in the ink component has the configuration described above in relation to the water-insoluble colorant to be used. However, other than that, the configuration may be the same as that of the conventional water-based ink. Below, each component which comprises the water-based ink of this invention is demonstrated.
- the aqueous medium constituting the aqueous ink according to the present invention will be described.
- Water based 6 The medium is a mixed solvent of water and water-soluble organic solvent.
- the water-soluble organic solvent is discriminated as a good solvent and a poor solvent for the material by the method described above. Based on the determination result, the water-soluble ink is mixed so that at least the good solvent and the poor solvent are mixed in the water-based ink, and the content of each water-soluble organic solvent is within the range defined in the present invention. It is necessary to select a solvent and mix it appropriately to prepare an ink.
- the second aqueous It is necessary to adjust the content of the water-soluble organic solvent so that the BZA in the ink is smaller than the B / A in the first water-based ink.
- the water-soluble organic solvent is, for example, carbon number such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butino alcohol, sec-butyl alcohol, tert-butyl alcohol, etc.
- amides such as dimethylformamide and dimethylacetamide; ketones or ketoalcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethylene glycol, Polyalkylene glycols such as polypropylene glycol; ethylene glycol, propylene dallicol, butylene glycol, triethylene glycol, 1,2,6 monohexanetriol, thioglycol, hexylene glycol, polyethylene Alkylene glycols containing 2 to 6 carbon atoms such as glycols; lower alkyl ether acetates such as polyethylene glycol monomethyl ether acetate; glycerin; ethylene glycol monomethinole (or ethinole) etherenole, diethylene glycol methyl ( Or ethyl) lower alkyl ethers of polyhydric alcohols such as ether and triethylene glycol monomethyl (or ethyl)
- the content of the water-soluble organic solvent in the aqueous ink according to the present invention is not particularly limited, but is preferably in the range of 3% by mass to 50% by mass with respect to the total mass of the ink.
- the total content (% by mass) of the poor solvent is 4% by mass or more with respect to the total mass of the ink, or the total content (% by mass) of the poor solvent is water.
- a content equal to or greater than the solid content (% by mass) of the insoluble colorant is preferable because the effects of the present invention can be effectively obtained.
- the water content in the water-based ink is preferably in the range of 50% by mass to 95% by mass with respect to the total mass of the ink.
- the total content (mass%) of the poor solvent is ratio [in the first water Inku, the total content of the good solvent (wt%): total (wt%) of the content of the poor solvent] ,
- a,: 10: 5 over 10: 30 range follows Preferably, 0: 5 or more 10:
- “The rate of Ai: is: d .: 5 or more and 10:30 or less” means that when is set to 10, is 5 or more and 30 or less.
- the aqueous ink when the content of the good solvent contained in the aqueous ink is large, the aqueous ink is excellent in storage stability, but is particularly high when the recording medium is plain paper. It is difficult to obtain image density. Conversely, when the content of the good solvent contained in the water-based ink is small, a high image density can be obtained, but the storage stability of the water-based ink may be insufficient.
- the ratio of the good solvent and the poor solvent in the water-soluble organic solvent in the ink as described above, it is possible to achieve both the storage stability of the water-based ink and the realization of a high image density. It becomes possible. Furthermore, in the second water-based ink, which is applied to areas where the image density is relatively low, such as highlight areas, the granularity of the image can be further reduced as the content of the poor solvent is reduced. It becomes. Furthermore, in the case of the first water-based ink, as described above, when determining each water-soluble organic solvent to be contained in the ink, it is obtained by the Bristow method, which is a measure representing the permeability to the recording medium. By controlling the value of the Ka value that can be achieved, it is possible to achieve an unprecedented effect of having a sufficiently large area factor and achieving high image density even with a small amount of ink droplets. Can be achieved.
- the water-insoluble colorant constituting the aqueous ink according to the present invention will be described. Any water-insoluble colorant constituting the water-based ink of the present invention can be used regardless of the dispersion method. Middle; e is particularly preferable to use a pigment.
- the pigment may be a so-called resin dispersion type pigment (resin dispersion type pigment) using a dispersant or a surfactant, a surfactant dispersion type pigment, or the pigment itself.
- a modified pigment (polymer-bonded type) in which organic groups containing a polymer are chemically bonded to the surface of the pigment particle. 9 Self-dispersing pigments) can be used.
- the water-insoluble colorant of the present invention is a material in which a water-insoluble colorant is dispersed in an aqueous medium, such as the resin-dispersed pigment, self-dispersing pigment, and polymer-bonded self-dispersing pigment described above. is there. That is, it goes without saying that the good solvent and the poor solvent for the water-insoluble colorant of the present invention indicate the good solvent and the poor solvent for the resin-dispersed pigment, self-dispersed pigment, polymer-bonded self-dispersed pigment, and the like. That is.
- the water-insoluble colorant that can be used in the present invention will be described.
- the content (% by mass) of the water-insoluble colorant is preferably 1% by mass to 10% by mass with respect to the total mass of the ink.
- the content (mass%) of the water-insoluble coloring material in the first aqueous ink and the content (mass%) of the water-insoluble coloring material in the second aqueous ink are the same or different. May be.
- the pigment that can be used in the water-based ink according to the present invention is not particularly limited, and any of those listed below can be used.
- a plurality of pigments can be used in combination in one water-based ink as required.
- Carbon black is suitable for the pigment used in the black ink.
- any carbon black such as furnace black, lamp black, acetylene black, or channel black can be used.
- Carbon black newly prepared for the present invention can also be used.
- the present invention is not limited to these, and any conventionally known force-bon black can be used.
- the material is not limited to carbon black, and magnetic particles such as magnetite and ferrite, titanium black and the like may be used as a black pigment.
- pigment particles used in addition to the black ink include various organic pigment particles.
- organic pigments include, for example, Tognacin Red, Toluidine Maroon, Hansa Yellow, Benzine Yellow, Pyrazolone Red and other insoluble raw pigments, Little Red, Helio Bordeaux, Pigment Scarlet, Permanent Red 2 B and other soluble azo pigments, derivatives from vat dyes such as alizarin, indanthrone and thioin digomaroon, phthalocyanine pigments such as phthalocyanine blue and phthalocyanine green, quinacridone such as quinatalydon red and quinatalydon magenta Pigments, perylene pigments such as perylene red and perylene curette, isoindolinone yellow, isoindolinone orange, etc.
- Isoindolinone pigments benzimidazolone yellow, benzimidazolone orange, benzimidazolone red and other imidazolone pigments, pyranthrone red, pyranthrone orange and other pyranthrone pigments, indigo pigments, condensed azo pigments, Thioindigo pigments, diketopyrrolopyrrole pigments, flapanthrone yellow, asylami doello, quinophthalone yellow, nickelo azo yellow, copper azomethine yellow, perinone orange, anthrone orange, dianthraquinol red, dioxazine violet, etc. Is mentioned. Of course, it is not limited to these, and other organic pigments may be used.
- an organic pigment that can be used in the present invention is a color index (C.
- a resin-dispersed pigment using a dispersant can be used as the water-insoluble colorant that can be used in the aqueous ink according to the present invention.
- a compound such as a surfactant or a resin dispersant for dispersing the hydrophobic pigment as listed above is required.
- the surfactant is preferably an anionic surfactant or a nonionic surfactant.
- anionic surfactants include fatty acid salt, alkyl sulfate ester salt, alkynolebenzene sulphonate salt, alkyl naphthalene sulphonate salt, dialkylolene succinate, alkyl phosphate salt, formalin naphthalene sulfonate Examples thereof include condensates, polyoxyethylene alkyl sulfates, and substituted derivatives thereof.
- the noion surfactant examples include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkylamine, glycerin fatty acid Examples thereof include esters, oxyethyleneoxypropylene block polymers, and substituted derivatives thereof.
- the resin dispersant include styrene and its derivatives, urnaphthalene and its derivatives, a , j3-ethylenically unsaturated carboxylic acid aliphatic alcohol ester, acrylic acid and its derivatives, maleic acid and its derivatives At least two monomers selected from itaconic acid and its derivatives, fumaric acid and its derivatives, butyl acetate, butyl alcohol, berylpyrrolidone, acrylamide, and its derivatives (at least one of them) Includes block copolymers composed of hydrophilic 1 "raw monomers), random copolymers, graft copolymers, and salts thereof. Further, block copolymers and random copolymers are used in combination. It can also be used.
- the water-insoluble colorant that can be used in the aqueous ink according to the present invention uses a microcapsule type pigment formed by coating a water-insoluble colorant with an organic polymer to form a micro force capsule. can do.
- Examples of the method of encapsulating a water-insoluble colorant with organic high molecules to form microcapsules include a chemical production method, a physical production method, a physicochemical method, and a mechanical production method.
- interfacial polymerization method interfacial polymerization method, in-situ polymerization method, submerged curing coating method, coacervation (phase separation) method, submerged drying method, melt dispersion cooling method, air suspension coating method, spray drying method , Acid precipitation method, phase inversion emulsification method and the like.
- organic polymers used as the material constituting the wall membrane material of the microcapsule include, for example, polyamide, polyurethane, polyester, polyurethane, epoxy resin, polycarbonate, urea resin, melamine resin, phenol Polysaccharides, gelatin, gum arabic, dextran, casein, protein, natural rubber, carboxypolymethylene, polyvinyl alcohol, polyvinyl pyrrolidone, poly (acetate acetate), polyvinyl chloride, polyvinylidene chloride, cell mouth, ethinole Senorelose, methizolecenolose, ditrocenolellose, hydroxy ethenorecellulose, cenololose acetate, polyethylene, polystyrene, (meth) acrylic acid polymer or copolymer,.
- (Meth) acrylic acid ester polymerization Or copolymer (meth) acrylic acid mono (meth) acrylic ester copolymer, styrene mono (meth) acrylic acid copolymer, styrene monomaleic acid copolymer, sodium alginate, fatty acid, paraffin , Beeswax, Mizuguchi., Hardened beef tallow, carnaval, albumin and the like.
- organic polymers having an anionic group such as a carboxylic acid group or a sulfonic acid group are preferable.
- nonionic organic polymer examples include, for example, polybulal alcohol, polyethylene glycol monomethacrylate, polypropylene dallicol monomethacrylate, methoxypolyethylene glycol monomethacrylate, or (co) polymers thereof.
- 2-oxazoline cationic ring-opening polymer examples include, for example, polybulal alcohol, polyethylene glycol monomethacrylate, polypropylene dallicol monomethacrylate, methoxypolyethylene glycol monomethacrylate, or (co) polymers thereof.
- 2-oxazoline cationic ring-opening polymer examples include, for example, polybulal alcohol, polyethylene glycol monomethacrylate, polypropylene dallicol monomethacrylate, methoxypolyethylene glycol monomethacrylate, or (co) polymers thereof.
- 2-oxazoline cationic ring-opening polymer examples include, for example, polybulal alcohol, polyethylene glycol monomethacrylate, polypropylene da
- an anionic organic polymer is used as the organic polymer constituting the wall membrane material of the microphone capsule.
- the phase inversion method is a composite or composite of an anionic organic polymer having self-dispersibility or solubility in water and a colorant such as a self-dispersing organic pigment or self-dispersing carbon black, or self A mixture of a colorant such as a dispersible organic pigment or self-dispersing carbon black, a curing agent and an anionic organic polymer is used as an organic solvent phase, and water is added to the organic solvent phase, or in water.
- the organic solvent phase is charged and microencapsulated while self-dispersing (phase inversion emulsification).
- the organic solvent phase can also be produced by mixing a water-soluble organic solvent or additive used in the ink. In particular, from the viewpoint that an ink dispersion can be directly produced, it is preferable to mix an aqueous ink medium.
- a part or all of the awionic groups of organic polymers containing an anionic group is neutralized with a basic compound, together with a colorant such as a self-dispersing organic pigment or a self-dispersing carbon black.
- a hydrous cake is produced by a kneading process in an aqueous medium, and a process in which pH is neutralized or acidified with an acidic compound to precipitate anionic polymer containing anionic groups and adhere to a pigment. obtain.
- it is the method of microencapsulating the said water-containing cake by neutralizing a part or all of an anionic group using a basic compound.
- Anionic microcapsule pigments that are fine and contain a large amount of pigment can be produced by the acid precipitation method.
- organic solvents used for microencapsulation as described above include, for example, alkyl alcohols such as methanol, ethanol, propanol, and butanol; aromatic hydrocarbons such as benzol, toluol, and xylol.
- alkyl alcohols such as methanol, ethanol, propanol, and butanol
- aromatic hydrocarbons such as benzol, toluol, and xylol.
- Esters such as methyl acetate, ethyl acetate, butyl acetate
- chloroform Examples include chlorinated hydrocarbons such as ethylene dichloride; ketones such as acetone and methyl isobutyl ketone; ethers such as tetrahydrofuran and dioxane; and cellosolves such as methyl and sodium sorbents.
- microcapsules prepared by the above method are once separated from these organic solvents by centrifugation or filtration, and then stirred and redispersed with water and the necessary solvent to obtain the desired microcapsules.
- the average particle diameter of the microcapsule type pigment obtained by the above method is 5 0 ⁇ ⁇ ! It is preferably ⁇ 180 nm.
- the water-insoluble colorant that can be used in the aqueous ink according to the present invention is a self-dispersing pigment that increases the dispersibility of the pigment itself and is dispersible without using a dispersant or the like.
- the self-dispersing pigment is preferably one in which a hydrophilic group is chemically bonded to the pigment particle surface directly or via another atomic group.
- the hydrophilic group introduced on the surface of the pigment particle is _CO OM l, 1 S 0 3 M 1 and 1 P 0 3 H (M 1) 2 (where M 1 is a hydrogen atom, an alkali metal) , Which represents an ammonium or an organic ammonium) and the like can be suitably used.
- the other atomic group is an alkylene group having 1 to 12 carbon atoms, a substituted or unsubstituted phenylene group, or a substituted or unsubstituted naphthylene group can be preferably used.
- the method of oxidizing carbon black with sodium hypochlorite, the method of oxidizing carbon black with ozone treatment in water, and wet oxidation with an oxidant after ozone treatment to modify the carbon black surface A self-dispersing pigment of the surface acid treatment type obtained by the method described above can also be suitably used.
- the water-insoluble colorant that can be used in the aqueous ink according to the present invention increases the dispersibility of the pigment itself and can be dispersed without using a dispersant or the like.
- Polymer-bonded self-dispersing pigments can be used.
- the polymer-bonded self-dispersing pigment includes a functional group chemically bonded to the surface of the pigment directly or through another atomic group, and a copolymer of a ionic monomer and a hydrophobic monomer. It is preferable to use one containing a reactant.
- the copolymerization ratio between the ionic monomer and the hydrophobic monomer, which is a material for forming the copolymer used for modifying the surface can be appropriately changed, and the pigment thus modified This is because the hydrophilicity can be adjusted appropriately.
- the kind of the ionic monomer and the hydrophobic monomer to be used and the combination of both can be appropriately changed, various properties can be imparted to the pigment surface.
- the functional group of the polymer-bonded self-dispersing pigment is chemically bonded to the pigment surface directly or through other atomic groups.
- the functional group is for constituting an organic group by reaction with a copolymer described later, and the type of the functional group is selected in relation to the functional group carried by the copolymer.
- the reaction between the functional group and the copolymer is preferably a reaction that does not cause hydrolysis or the like, for example, an amide bond.
- the copolymer can be introduced to the surface of the pigment particle via an amide bond by making the functional group an amino group and supporting the carboxyl group on the copolymer.
- the functional group may be a carboxyl group, and the copolymer may be supported with an amino group.
- the polymer can be introduced to the pigment particle surface via an amide bond.
- the functional group chemically bonded to the pigment surface may be bonded directly to the pigment surface or may be bound to the pigment surface via another atomic group.
- functional groups must be introduced to the pigment surface via other atomic groups in order to avoid steric hindrance between the copolymers.
- the other atomic groups are not particularly limited as long as they are polyvalent elements or organic groups.
- a divalent organic residue is preferably used from the viewpoint of controlling the distance of the functional group from the pigment surface.
- the divalent organic residue include an alkylene group, a arylene group (a phenylene group), and the like.
- the pigment is reacted with aminophenyl (2-sulfoethyl) sulfone to introduce an aminophenol- (2-sulfoethyl) 'sulfone group on the pigment surface, and then
- the amino group as a functional group is introduced by reacting the amino group of pentaethylenehexamine with the aminophenyl (2-sulfoethyl) sulfone group.
- the amino group is chemically bonded to the pigment surface via an atomic group containing a phenyl (2-sulfoethyl) group.
- the present invention is not limited to this.
- the copolymer of the ionic monomer and the hydrophobic monomer is preferably, for example, an anionic raw copolymer having anionic properties, or a force thionic copolymer having power thione properties.
- anionic copolymer examples include a copolymer of a hydrophobic monomer and an anionic monomer, or a salt thereof.
- hydrophobic monomer examples include methacrylic acid alkyl esters such as styrene, urnaphthalene, and methyl methacrylate, phenol methacrylate, benzyl methacrylate, 2-ethetyl methacrylate, methacrylonitrile, 2-trimethyl ester.
- Specific examples of the anionic monomer include acrylic acid, meta Examples thereof include crylic acid and maleic acid. Of course, the present invention is not limited to this.
- the anionic copolymer of a vinyl monomer and a hydrophobic monomer is any one selected from the above-mentioned hydrophobic monomers and at least one selected from the above-mentioned anionic monomers. Consists of at least two monomers. Examples of the eron copolymer include a block copolymer, a random copolymer, a graph copolymer, or a salt thereof.
- Such an ionic copolymer preferably has an acid value in the range of 100 to 500, and preferably has a variation in acid value within 20% of the average acid value. If the acid value is higher than the above range, the hydrophilicity of the pigment surface becomes too high, so that the water and solvent in the ink after printing stays on the pigment surface and the scratch resistance after printing on the recording medium. The expression of marker resistance may be delayed. On the other hand, when the acid value is lower than the above range, the hydrophilicity of the pigment surface becomes too low, and the pigment may not be stably dispersed in the ink.
- Examples of the salt of the anionic copolymer include ammonium salts, alkylamine salts, alkanolamine salts, and the like, in addition to alkali metal salts such as sodium, lithium, and potassium. Moreover, these can be used individually or in combination of two or more appropriately.
- examples of the cationic copolymer include a copolymer of a hydrophobic monomer and a cationic monomer, or salts thereof.
- the hydrophobic monomer the monomers listed above can be used.
- Specific examples of the cationic monomer include arylamine, dimethylaminoethyl methacrylate, jetylaminoethyl methacrylate, tert-butylaminoethyl methacrylate, dimethylaminoethyl acrylate, and jetylaminoethyl acrylate.
- Dimethylaminopropyl methacrylate, N-vinylcarbazole, methacrylamide, acrylic amide, dimethylacrylamide, etc. Can be mentioned.
- the present invention is not limited to this.
- the anionic copolymer of the force thione monomer and the hydrophobic monomer is any one selected from the above-mentioned hydrophobic monomers, and at least one selected from the force thione monomers listed above. Consists of at least two monomers.
- Examples of the cationic copolymer include a block copolymer, a random copolymer, a graft copolymer, or a salt thereof.
- Such a cationic copolymer preferably has an amine value in the range of 100 to 500, and preferably has a variation in amine value within 20% of the average amine value.
- the amine value is a value expressed in mg of K 2 O H in accordance with the acid value after neutralizing 1 g of the sample.
- Examples of the salt of the cationic copolymer include acetic acid, hydrochloric acid, nitric acid and the like. Moreover, these can be used individually or in combination of multiple suitably.
- the above-described ionic or cationic copolymer preferably has a weight average molecular weight (Mw) in the range of I 1, 0 0 0 to 20 0, 0 0, , 0 0 0 to 2 0, 0 0 0 are preferred. Further, the polydispersity of the cationic copolymer segment Mw / Mn (weight average molecular weight Mw, number average molecular weight M n) is preferably 3 or less. The mass of such anionic or cationic copolymer is 5% or more and 40% or less with respect to the mass of the pigment particles surface-modified by the copolymer in the ink. I want to be there.
- the molecular weight distribution of the copolymer becomes wide, and the above-described properties based on the molecular weight of the copolymer are difficult to express.
- the molecular weight distribution is preferably uniform.
- the method that can be used in this case is to introduce functional groups on the surface of the pigment particles, or functional groups on the surface of the pigment particles, and to these functional groups, a co-polymer consisting of a ionic monomer and a hydrophobic monomer.
- a co-polymer consisting of a ionic monomer and a hydrophobic monomer.
- the following method can be used.
- Introducing polyethyleneimine etc. on the surface of pigment particles such as carbon black and bonding a copolymer of an ionic monomer and a hydrophobic monomer having an amino group at its terminal functional group by a diazonium reaction A method such as a method in which a copolymer having an amino group and a carboxyl group in the molecule is bonded to the pigment particle surface such as one pump rack by a diazonium reaction can be used.
- the most typical example of other methods is disclosed in WO 0 1/5 1 5 6 6 A 1. '
- Second step A process of adding polyethyleneimine or pentaethylenehexamine (P E HA) to carbon black treated with APSESS.
- 'Third step A step of applying a copolymer of a hydrophobic monomer and a ionic monomer having a carboxyl group.
- the phenyl (2-sulfoethyl) sulfone group that is chemically bonded to the carbon black surface in the first step is reacted with the amino group of APSES to chemically react with the carbon black surface.
- An amino group as a functional group formed by bonding is introduced.
- the third step for example, a part of the carboxyl group of the ionic monomer portion of the copolymer is reacted with an amino group to form an amide bond, whereby the copolymer is carbon black.
- a copolymer can be introduced into the surface of the substrate via an atomic group containing a phenyl (2-sulfoethyl) 'group that is a residue of APSES and a residue of PEHA. 3
- a phenyl (2-sulfoethyl) 'group that is a residue of APSES and a residue of PEHA. 3
- Second step A step of applying a copolymer of a hydrophobic monomer and a force thione monomer.
- a sulfone group is introduced as a functional group chemically bonded to the carbon black surface.
- a part of the amino group of the ionic monomer portion of the copolymer is reacted with a sulfone group (nucleophilic substitution), and the copolymer is applied to the surface of carbon black.
- a copolymer can be introduced through an atomic group containing a phenyl (2-sulfoethyl) group which is a residue of APSES.
- the water-based ink according to the present invention may use a moisturizing solid content such as urea, a urea derivative, trimethylolpropane, trimethylolethane, etc. as an ink component in addition to the above-described components in order to maintain moisture retention.
- a moisturizing solid content such as urea, a urea derivative, trimethylolpropane, trimethylolethane, etc.
- the content of moisturizing solids in aqueous inks such as urea, urea derivatives, and trimethylolpropane is generally from 0.1% by mass to 20.0% by mass, and even 3.0% by mass with respect to the total mass of the ink. The range of mass% to 10.0 mass% is preferred.
- the water-based ink according to the present invention includes: • Surfactant, pH adjusting agent, antifungal agent, antiseptic agent, antifungal agent, antioxidant, anti-reducing agent.
- Various additives such as an evaporation accelerator and a chelating agent may be contained.
- nonionic surfactant it is preferable to add a nonionic surfactant to the water-based ink according to the present invention in order to adjust the surface tension and improve the ejection property.
- a specific example of the nonionic surfactant is a compound having any one of the following structural formulas (1) to (4).
- R is an alkyl group, and ri is an integer.
- R is an alkyl group, and II is an integer.
- R is hydrogen or alkyl S, and m and n are each an integer.
- R is a linear or branched alkyl group having 8 to 21 carbon atoms, and n is 5 to 40. Les, which is preferably an integer. It is also possible to use a mixture of two or more compounds having different values of R and Z or n.
- R is preferably a linear or branched alkyl group having 8 to 21 carbon atoms
- n is an integer of 5 to 40. It is also possible to use a mixture of two or more compounds having different values of R and / or n.
- m is an integer from 1 to 10
- n is:! It is preferably an integer of ⁇ 10.
- m represents the number of ethylene oxide units
- n represents the number of propylene oxide units
- m is preferably an integer of 1 to: L 0 and n is an integer of 1 to: L 0. Mixtures of two or more compounds with different values of m and Z or n can also be used. '
- the content of the compound having any one of the structural formulas (1) to (4) in the aqueous ink is in the range of 0.05% by mass to 5% by mass with respect to the total mass of the aqueous ink. Furthermore, it is preferable that it is 0.1 mass%-2 mass%.
- the aqueous wing used in the present invention which is composed of the components described above, has a characteristic that it can be favorably ejected from an ink jet recording head.
- the ink characteristics 1S For example, the viscosity is 1 to 15 mPa's, the surface tension is 25 mN / m (dyne / cm) or more, and the viscosity is: It is preferable that the surface tension is 25 to 50 mN / m (dyn e / cm).
- the reaction solution used in the present invention contains a reactive component that destabilizes or aggregates the dispersion state of the water-insoluble colorant in the ink.
- the reactive component is a mixture of an ink in which a water-insoluble colorant is dispersed or dissolved in the aqueous medium by the action of a hydrophilic group, and the water-insoluble colorant when the reaction liquid contacts on the recording medium. Reduces dispersion stability and aggregates water-insoluble colorants.
- destabilization of the dispersion state of the coloring material in the ink means that aggregation and gelation are caused when the ink and the reaction liquid are mixed.
- the first water The sex ink and the second water 1-ink may be used for the recording medium to which the reaction liquid is applied, or may be used for the recording medium to which the reaction liquid is applied, if necessary.
- the reactive component include metal salts (particularly polyvalent metal ions and salts thereof), low molecular weight cationic compounds, and cationic polymers.
- the reactive component will be described.
- Polyvalent metal ions specifically, for example, Ca 2+, Cu 2+, N i 2+, Mg 2 +, Zn 2+, S r 2+ ⁇ Pi divalent metal B a 2+, etc. ions and, a 1 3+, F e 3+ , include trivalent metal ion of C r 3+ ⁇ Pi Y 3+ and the like.
- Examples of the method of incorporating the polyvalent metal ion into the reaction solution include a method of adding a polyvalent metal salt to the reaction solution.
- the salt is a metal salt composed of the above-mentioned polyvalent metal ions and anions that bind to these ions, but it must be soluble in water.
- Preferred anions for forming the salts are, for example, CI—, ⁇ 31 , I—, Br—, C 10 3 —, S0 4 2 —, C0 3 2 —, CH 3 COO— and HCOO— etc. Is mentioned.
- the present invention is not limited to this.
- the polyvalent metal ions are C a 2 + , Mg 2 + , S r 2+ , Al 3+ and Y 3+ are preferred, and Ca 2+ is particularly preferred.
- the anion is particularly preferably NO 3 from the viewpoint of solubility and the like.
- the content of polyvalent metal ions in the reaction solution is 0.01% by mass or more and 10% by mass or less, more preferably 1.0% by mass or more and 5% by mass with respect to the total mass of the reaction solution, considering the effect of the present invention. % Or less is preferable.
- the content of the polyvalent metal ion is required to exhibit the function of destabilizing the dispersion state of the water-insoluble colorant contained in the water-based ink and to obtain a high level of image density. It is preferable that it is 2.0 mass% or more and 4.0 mass% or less with respect to the total liquid mass.
- the polyvalent metal ion content in the reaction solution may exceed 10% by mass. Force Even if the content is more than 10% by mass, it is not usually necessary to make it excessively contained because the function of destabilizing the dispersion state of the water-insoluble colorant cannot be expected. .
- the reaction solution preferably contains no color material and is transparent. However, it does not necessarily have to show no absorption in the visible region. That is, even if absorption is shown in the visible range, absorption may be shown in the visible range as long as it does not substantially affect the image.
- Examples of methods for applying the reaction liquid to the recording medium include coating methods such as a roller coating method, a bar coating method, and a spray coating method.
- an ink jet recording method can be used as in the case of ink, and an application method in which the reaction liquid is selectively attached only to the vicinity of the image forming area where the ink adheres and the image forming area is possible.
- the roller-one coating method is the best. This is because even when the amount of the reaction liquid applied is small, the distribution of the reactive components in the vicinity of the surface layer of the recording medium is more uniform than that of other means. This is because the image quality such as the show-through property is excellent.
- the reaction solution and aqueous ink are various methods for bringing the reaction solution and aqueous ink into contact with each other on a recording medium.
- the aqueous ink is applied to the recording medium after the fixing of the reaction liquid to the recording medium is completed, that is, after the droplets of the reaction liquid are absorbed by the recording medium.
- the method is preferred. This is because, when the aqueous ink of the present invention and the reaction liquid are contacted in a liquid state on the recording medium, depending on the reactivity between the aqueous ink and the reaction liquid, the image density of the highlight portion or the like, which is a feature of the present invention, may be reduced.
- the time when fixing is completed means that the value of Ka (t-tw) 1/2 shown by the Bristow equation is the amount of reaction liquid actually applied to the recording medium. Means the point of time when it becomes larger. This means the point in time when the droplets of the reaction liquid are absorbed by the recording medium, and means t seconds after being calculated from the Ka value by the Bristow method and the applied amount of the liquid composition.
- Penetration into the reaction liquid of the recording medium is a K a value determined Te Bristow 3 ⁇ 4 Niyotsu, 1. 3 m doctor m- 2 ⁇ mse c- 1/2 or 6. There 0 m m - 2, msec - It is preferably 1/2 or less, and more preferably 3. OmL ⁇ m ⁇ 2 ⁇ msec— 1 / 2 or more. 6. OmL ⁇ m ⁇ 2 ⁇ ms ec ⁇ 1 / 2 or less.
- the coating amount of the reaction solution is preferably 0.5 gZm 2 or more and 5 g / m 2 or less, and more preferably 2. O gZm 2 or more and 3.0 g / m 2 or less. .
- the coating amount of the reaction liquid can be adjusted as appropriate depending on the physical properties of the reaction liquid, the rotation speed of the roller used in the coating apparatus, the contact pressure of the roller to the recording medium, and the like.
- the reaction liquid since the reaction liquid needs to be reacted only with the aqueous ink according to the present invention, the reaction liquid is reacted on the recording medium so that the reaction liquid does not bleed into a portion other than the recording portion by the aqueous ink of the present invention.
- the surface tension of the liquid is within the range that can be discharged from the recording head, and is larger than the surface tension of the water-based ink that is the target of destabilizing the dispersion state of the water-insoluble colorant by the reaction liquid. It is preferable.
- the image forming method according to the present invention uses at least a first water-based ink containing water, a water-insoluble colorant, a good solvent for the water-insoluble colorant, and a poor solvent for the water-insoluble colorant.
- a second recording in which A is smaller than B / A in the first aqueous ink and a relatively low density recording is performed using the second aqueous ink having the same hue as the first aqueous ink. It is characterized by having a mode.
- the density of the image is considered by the amount of ink applied, and “relatively low density” indicates a portion where the amount of ink applied to the recording medium is relatively small. “High density” indicates a portion where the amount of applied ink is relatively large.
- an image formation performed by applying 14400 ink droplets having a volume per dot of 4 ng with a resolution of 1200 dpi ⁇ 1200 dpi is defined as “100% duty”.
- the boundary between the portion having 80% duty or more and an image having another hue is the first.
- Image formation is performed using 1 aqueous ink.
- an image is formed by using the second aqueous ink for a portion less than 20% duty. Note that an intermediate portion between 20% duty and less than 80% duty is formed by using both the first aqueous ink and the second aqueous ink.
- the numerical values such as the resolution, the number of ink droplets, and duty are listed as examples of the image forming method, and the present invention is not limited to these.
- the image forming method of the present invention is the image forming method for recording on a recording medium such as plain paper by the ink jet recording method using the black ink and at least one color water-powered link.
- a recording medium such as plain paper by the ink jet recording method using the black ink and at least one color water-powered link.
- scanning is performed to apply the black ink. After the image is formed, scanning for applying color ink to the area where the image is formed is performed.
- the first aqueous ink and the second aqueous ink are black inks and the other inks are color inks
- An image having a high image density and reduced graininess can be obtained, and furthermore, generation of bleeding can be effectively suppressed, which is preferable.
- the reason is considered as follows.
- a glossy recording medium gloss recording medium
- recording media such as plain paper tend to have greater ink bleeding than glossy recording media. For this reason, the effects of the present invention can be sufficiently exerted by using black ink, which is often used for printing on plain paper, as the first aqueous ink and the second aqueous ink of the structure of the present invention. . .
- FIGS. 7 to 12 showing the configuration of a recording head used when the method is carried out.
- the reference numerals indicating the ejection port arrays for ejecting ink are the same as the symbols indicating the types of ink ejected from the ejection port arrays, such as BKI, BKII, C, M, and Y. Is devoted.
- the black ink discharge port array and the color ink discharge port array for discharging the black ink and the color ink discharge port array for the discharge of the black ink, respectively, are provided as sub-types. It is preferable to use recording heads arranged along the scanning direction 71.
- the black ink ⁇ outlet array uses one area, and each color ink + discharge port array uses the entire area to form an image.
- the recording head in FIG. 7 includes the ejection port arrays BKI and BKII for ejecting the first aqueous ink BKI and the second aqueous ink BKII as black ink, cyan (C), magenta, (M) and Yello (Y) are provided with ejection port arrays C, M, and Y for ejecting the three colors of ink, respectively.
- cyan (C), magenta, (M) and Yello (Y) are provided with ejection port arrays C, M, and Y for ejecting the three colors of ink, respectively.
- the black image data is formed on the recording medium by one-pass printing by scanning the head in the main running direction 72.
- the recording medium is transported in the sub-scanning direction 7 1 by a distance a of the portion 7 3, and the portion 7 4 of the outlet line array for force linking is used in the forward scanning process of the next print head.
- a color image is formed on the recording medium by one-pass printing in the image area formed by the portion 73 of the black ink discharge port array (BKI and BKII).
- the black ink ejection port array (BKI and BKII) portion 73 forms an image in the next area.
- black ink is applied using part 73 of black discharge port arrays BkI and BKII, and C, M, and Y color inks. Is applied to form a mixed image of a black image and a color image by using a portion 74 corresponding to one region of the color ink discharge port array.
- FIG. 9 as in the case of FIG. 7, an image in which a black image and a color image are mixed is formed.
- the recording head shown in FIG. 9 between the black ink discharge port row (Bk I and BKII) portion 73 and the color ink discharge port row portion 74, one batch A distance of 75 is provided for the paper feed amount a.
- the recording head shown in FIG. 9 has a more advantageous configuration for suppressing bleeding between the black image and the color image than the recording head shown in FIG.
- the black ink discharge port and the color ink discharge port are arranged for each type of discharge port and arranged in a row in the sub-scanning direction 71.
- the color image is formed after the black image is formed according to the paper feed.
- the order of the discharge port rows in each group is arranged so that the order of the driven strokes is the same in the forward and backward directions of the main investigation so that the order of the other group is reversed.
- a black image is formed using the portion 73 of the black ink ejection port array (81 1 and 8 1 ⁇ 1 I).
- the recording medium is conveyed by the distance a of the portion 73 in the auxiliary running direction.
- the color image is formed in the color ink discharge port array portion by the main scan in the backward direction of the print head in the image region formed by the black ink discharge port array portion 73. 7 Use 4 to form on a recording medium with 1-pass printing.
- the black discharge outlet rows BKI and BKII portion 73 form an image in the next area.
- the black ink discharge port array portion 7 3 and the color ink discharge port are also provided in the same manner as the recording head described in FIG. Arranged as shown in Fig. 12 with a distance of 75 for one paper feed amount a 'between the row portions 7 4 and the color image is formed after the black image is formed.
- a time difference corresponding to one scan in a reciprocation may be provided, and a more advantageous configuration may be provided for suppressing bleeding between a black image and a color image.
- the image forming method according to the present invention has been described above.
- the form of the recording head that can be used in the image forming method according to the present invention is not limited to FIGS.
- the number of passes varies depending on the recording device used, it is not limited to one-pass printing. ' Gink set>
- the first aqueous ink and the second aqueous ink according to the present invention may be used as an ink set in combination with another ink.
- the ink set may be in any of the following forms as long as a plurality of inks are combined.
- an ink set composed of an ink tank with a tank containing cyan ink, magenta ink, yellow ink, and black ink, or an ink tank with a head, or a sink ink, magenta ink
- the ink tank is composed of an ink tank with a structure in which the tanks containing the yellow ink are integrated or an ink tank with a head thereof, or each ink tank containing the ink as described above is a recording device.
- Ink sets having a structure configured to be detachable are included.
- the present invention is not limited to the above-described embodiments, and any modification may be used.
- FIG. 1 is a partial sectional view showing an example of an ink jet recording apparatus.
- the ink jet recording apparatus can also apply a two-component system.
- This ink jet recording apparatus adopts a serial type ink jet recording system, and includes a recording head 1, a recording medium (hereinafter also referred to as recording paper) 1 9, a paper feed tray 1 7, a reaction liquid
- a paper feed cassette 16 formed with a body and a drive means for reciprocating the recording head in a direction (main scanning direction) perpendicular to the recording paper transport direction (sub-scanning direction) And control means for controlling the drive of these components.
- the surface on which the ink discharge ports are formed is oriented to the platen 1 1 side. In this way, it is mounted on the carriage 2.
- the recording head 1 includes the ink discharge port, a plurality of electric heating element elements (for example, heating resistance elements) for heating the ink liquid, and a substrate for supporting the same.
- the recording head 1 has an ink cartridge mounted in the upper carriage.
- the carriage 2 has a recording head 1 mounted thereon and can reciprocate along two guide shafts 9 extending in parallel along the width direction of the recording paper 19.
- the recording head 1 is driven in synchronism with the reciprocation of the carriage, and ejects ink droplets onto the recording paper 19 to form an image.
- the paper feed cassette 16 ' can be detached from the ink jet recording apparatus main body.
- the recording paper 19 is loaded and stored on a paper feed tray 17 in the paper feed cassette 16. During feeding, the uppermost sheet is pressed against the paper roller 10 by a spring 18 that presses the paper feed tray 17 upward.
- This paper feed roller 10 is a roughly half-moon shaped roller that is driven and rotated by a motor (not shown) and feeds only the uppermost sheet (recording paper 19) by a separation claw (not shown).
- Separately fed recording paper 1 9 is divided into the conveyance surface of paper cassette 16 and the conveyance surface of paper guide 2 7 by a large-diameter intermediate roller 1 2 and a small-diameter application roller 6 pressed against it. It is conveyed along. These transport surfaces are curved surfaces that are concentric with the intermediate roller 12. Accordingly, the recording sheet 19 reverses its conveying direction by passing through these conveying surfaces. That is, the surface on which the recording paper 19 is printed is facing downward until it reaches the intermediate outlet 1 2 after being transported from the paper feed tray 1 7, but when it faces the recording head 1 Then, face up (recording head side). Therefore, the printing surface of the recording paper always faces the outside direction of the ink jet recording device.
- the reaction liquid application means is provided in the paper feed cassette 16 and rotates with a replenishment tank 2 2 for supplying the reaction liquid 15 and a part of the peripheral surface immersed in the tank 22.
- Freely supported intermediate roller 1 2 and parallel to the intermediate roller It has an application roller 6 that is arranged in this way and that contacts the intermediate roller 12 and rotates in the same direction.
- the application roller 6 is arranged so that the intermediate roller 12 for conveying the recording paper 19 is in contact with and parallel to the peripheral surface. Therefore, when the recording paper 19 is transported, the intermediate roller 1 2 and the coating roller 6 rotate as the intermediate roller 12 rotates.
- reaction liquid 15 is supplied to the circumference surface of the coating roller 6 by the supply roller 13, and is further uniformly applied to the printing surface of the recording paper 19 sandwiched between the coating roller 6 and the intermediate roller 12.
- the reaction solution is applied by the supply roller 6.
- a float 14 is provided in the collection tank 22.
- This float 14 is a substance having a lighter specific gravity than the reaction liquid 15 and floats on the liquid surface of the reaction liquid, so that the reaction liquid containing the reaction components from the outside through the remaining amount display window 21 which is a transparent member. The remaining amount can be confirmed visually. ⁇
- the remaining amount display section is provided with a display indicating the level of the remaining amount along the longitudinal direction of the remaining amount display window 2 1.
- the reaction liquid level or float 14 reaches the position labeled “F u 1 1”, it is full.
- the reaction solution 15 should be replenished when the reaction solution 15 gradually decreases and the float 14 lowers to the Ad d line.
- the replenishment method of the reaction solution is composed of a rubber member with a slit at the tip of the injection device 2 3 with the paper feed cassette 16 pulled out from the ink jet recording device body.
- the reaction solution is injected into the replenishing tank 22 by inserting it into the inlet 20.
- the recording paper coated with the reaction liquid is then fed a predetermined amount by the main transport roller 7 and the pinch roller 8 in pressure contact with the main transport roller 7 and transported to the recording section, and the recording head 1 receives ink. Is granted.
- paper feeding and printing The recorded sheet 19 is discharged and conveyed by the discharge roller 3 and the spur 4 that is in pressure contact with the discharge roller 3, and is stacked on the discharge tray 5.
- the ink When applying the reaction solution with a roller, etc., especially when the viscosity of the reaction solution is higher than the viscosity of the ink, the ink can be effectively destabilized even with a small amount of reaction solution applied, and the recorded material It is preferable because of its good fixability. More specifically, when the viscosity of the reaction liquid is high, the polyvalent metal ions are more likely to stay near the surface of the recording medium, and thus easily react with the ink effectively. After the ink reacts with the reaction liquid, the colorant component in the ink stays in the vicinity of the surface of the recording medium, and the water-soluble organic solvent and water quickly permeate the recording medium, that is, the solid-liquid separation is performed quickly. It is preferable.
- the viscosity of the reaction solution is preferably low from the viewpoint of the fixability of the recorded matter.
- the viscosity of the reaction solution is 3 m Pa ⁇ s or more and 10 O m Pa ⁇ s or less, and further 5 m Pa ⁇ s or more and 6 O m Pa ⁇ s or more.
- the viscosity of the reaction liquid or ink in the present invention can be measured by a conventional method under an environment of 25 ° C. ⁇ '
- FIG. 4 shows another example of an ink jet recording apparatus.
- reference numeral 61 denotes a blade as a wiping member, one end of which is held and fixed by a blade holding member, and forms a cantilever.
- the blade 61 is disposed at a position adjacent to the recording area by the recording head 65, and in this example, is held in a form protruding in the moving path of the recording head 65.
- 6 2 is a cap on the protruding port surface of the recording head 65, which is disposed at the home position adjacent to the blade 61, and moves in a direction perpendicular to the moving direction of the recording head 65, thereby ejecting ink. It has a structure that abuts the outlet surface and performs cabbing.
- 63 is an ink absorber provided adjacent to the blade 61, and is held in a form protruding in the moving path of the recording head 65, like the blade 61. The blade 61, the cap 62, and the ink absorber 63 make up the discharge recovery section 64, and the blade 61 and the ink absorber 63 make up the moisture, dust, etc. Removal is performed.
- each ink of the recording head, and further, the ink located at the discharge port of the reaction liquid is sucked by a pump (not shown) through a cap, and the original ink of the recording head, or ink and reaction. It is a recovery unit that restores the original discharge performance of the liquid.
- 6 5 has a discharge energy generating means, and a recording head for recording by discharging ink to a recording medium facing the discharge port surface provided with the discharge port.
- 6 6 is a recording head 6 5 It is a carriage for moving the recording head 6 5 with the.
- the carriage 6 6 is slidably engaged with the guide shaft 6 7, and a part of the carriage 6 6 is connected to a belt 6 9 driven by a motor 6 8 (not shown).
- the carriage 66 can move along the guide shaft 67, and the recording area and its adjacent area can be moved by the recording head 65.
- Reference numeral 51 denotes a paper feeding unit for inserting a recording medium
- 52 denotes a paper feed roller driven by a motor (not shown).
- the recording medium is fed to a position facing the 65 discharge port surface of the recording head, and is discharged to a discharge portion provided with a discharge roller 53 as recording progresses.
- the cap 6 2 of the discharge recovery section 6 4 is retracted from the moving path of the recording head 6 5, but the blade 6 1 protrudes in the movement path.
- the discharge port of the recording head 65 is wiped.
- the cap 62 moves so as to protrude into the moving path of the recording head.
- the cap 62 and the blade 61 are in the same positions as those of the wiping described above. As a result, even in this movement, the discharge port surface of the recording head 65 is wiped.
- the above-mentioned movement of the recording head to the home position is performed not only at the end of recording or at the time of ejection recovery, but also at a predetermined interval while the recording head moves through the recording area for recording. To move to the home position adjacent to the recording area, and the wiping is performed with this movement.
- FIG. 5 shows an example of a cartridge 45 containing a member that supplies a reaction tank that does not contain ink or coloring material to the recording head, for example, an ink or reaction liquid supplied via a tube.
- reference numeral 40 denotes a storage portion, for example, a bag, which stores ink for supply or reaction liquid, and a rubber stopper 42 is provided at the tip thereof. By inserting a needle (not shown) into the stopper 42, the ink or reaction liquid in the bag 40 can be supplied to the head.
- 4 4 is an absorber that accepts waste ink or waste reaction solution.
- the container 40 preferably has a liquid contact surface made of polyolefin, particularly polyethylene, with the ink or the reaction liquid. For example, as shown in FIG.
- such a force cartridge is configured to be detachable from a recording head 91 for discharging an ink or a reaction solution, and the four cartridges are connected to the recording head. In the state of being attached to the head, the ink or the reaction liquid is supplied to the recording head 9 0 1.
- the solid content concentration of the pigment dispersions 1 and 2 is 10 mass.
- a 0 aqueous solution was prepared, and using this and each water-soluble organic solvent, a dispersion A for determination of a good solvent / a poor solvent and an aqueous dispersion B for determination were prepared at the following blending ratio.
- the determination aqueous dispersion B was not warmed and stored, and the average particle size of the pigment in the dispersion was measured using a concentrated particle size analyzer in the same manner as described above. Then, the water-soluble organic solvent in which the average particle diameter of the pigment in the determination dispersion A and the determination aqueous dispersion B is larger than that of the determination dispersion A is determined as a poor solvent. A water-soluble organic solvent in which the average particle size of the dispersion liquid A was equal to or less than that of the determination aqueous dispersion liquid B was determined as a good solvent.
- an aqueous dye solution having a composition shown below and having a dye concentration of 0.5% by mass was prepared.
- the reason for using such an aqueous dye solution is to make it easy to measure the Ka value by visualizing a colorless and transparent sample by coloring it.
- a 20% aqueous solution of a colored water-soluble organic solvent having the following composition was prepared from the 0.5% by mass dye aqueous solution and each water-soluble organic solvent to be measured.
- Table 1 shows the measurement results of the Ka value in a 20% by mass aqueous solution.
- O and X represent a good solvent and a poor solvent, respectively.
- the printer driver selected the default mode.
- the setting conditions for the default mode are as follows.
- the following copy paper was left for 24 hours in an environment with a temperature of 23 ° C and humidity of 40%.
- Example 1 a recorded material was prepared using BK 1 and BK 6 in combination.
- BK 1 is installed at the black ink position of the above recording device, and BK 6 is installed at the photo cyan ink position, and a solid image of 5 cm x 5 cm is printed with the duty changed to 100% duty in increments of 10% duty. It was. Note that BK6 is printed for 20% duty or less, BK6 and BK1 for 30% duty or more and 70% duty or less, and BK1 for 80% duty or more.
- the print signal was set so that
- Example 2 a recorded material was produced in the same manner as described above using a combination of 8 2 and 81 ⁇ 6.
- BK2 was installed at the black ink position of the above recording device, and BK 6 was installed at the photo cyan ink position. Note that printing is performed using BK6 for 20% duty or less, ⁇ 6 and ⁇ 2 for 30% duty or more and 70% duty or less, and ⁇ 2 for 80% duty or more.
- the print signal was set in
- Example 3 a recorded material was produced in the same manner as described above using a combination of ⁇ 3 and ⁇ 6. ⁇ 3 was attached to the black ink position of the above recording device, and ⁇ 6 was attached to the photocyan ink position. Note that printing is performed using ⁇ ⁇ ⁇ K6 for 20% duty or less, ⁇ 6 and ⁇ 3 for 30% duty or more and 70% duty or less, or ⁇ 3 for 80% duty or more. The print signal was set.
- Example 4 a recorded matter was produced in the same manner as described above using 4 and 81: 7 in combination. ⁇ 4 was installed at the black ink position and ⁇ ⁇ 7 was installed at the photocyan ink position of the recording device. In addition, when 20% duty or less, print using ⁇ K7, 30% duty or more 70%, or less than duty 7 or ⁇ 4, 8 0% duty or more, use ⁇ ⁇ ⁇ 4. The print signal was set.
- Example 5 a recorded material was produced in the same manner as described above using ⁇ 2 and ⁇ 7 in combination. ⁇ 2 was attached to the black ink position of the above recording device, and ⁇ 7 was attached to the photocyan ink position. In case of 20% duty or less, ⁇ The print signal was set so that printing was performed using BK7 and BK2 for K7, 30% duty and 70% duty, and BK2 for 80% duty and more.
- Example 6 a recorded matter was produced in the same manner as described above using BK 8 and BK 6 in combination.
- BK 8 was installed at the black ink position and BK 6 was installed at the photo cyan ink position in the above recording device. Note that printing is performed using BK6 for 20% duty or less, ⁇ 6 and ⁇ 8 for 30% duty or more and 70% .duty or less, or ⁇ 8 for 80% duty or more.
- the print signal was set.
- Example 7 a recorded material was produced in the same manner as described above using 84 and 81:10 in combination. ⁇ 4 was installed at the black ink position of the above recording device, and BK10 was installed at the photo cyan ink position. Note that printing is performed using BK10 for 20% duty or less, BK10 and BK4 for 30% duty or more and 70% duty or less, and ⁇ 4 for 80% duty or more. The print signal is set.
- Example 8 a recorded matter was produced in the same manner as described above using a combination of ⁇ 11 and ⁇ 12.
- ⁇ ⁇ ⁇ ⁇ ⁇ 11 was installed at the black ink position
- BK 12 was installed at the photo cyan ink position. Note that printing is performed using BK12 for 20% duty or less, BKl 2 and BK11 for 30% duty or more and 70% duty or less, and BKl 1 for 80% duty or more.
- the print signal was set in
- Example 9 BK11 and BK13 are used in combination with A recorded matter was produced in the same manner.
- BK11 was installed at the black ink position and BK13 at the photocyan ink position of the above recording device. Note that printing is performed using BK 13 for 20% duty or less, BK 13 and BK11 for 30% duty or more and 70% duty or less, and BK 11 for 80% duty or more.
- the print signal was set in
- a recorded material was prepared using BK 2 in the same manner as described above.
- BK 2 was installed at each of the black ink position and the photo ink position of the recording device. In all cases, printing was performed using BK 2 ink.
- Comparative Example 1 a recorded material was produced in the same manner as described above using a combination of 82 and 81 ⁇ 6.
- B K 2 was installed at the black ink position and BK 6 was installed at the photo cyan ink position in the recording device. If the ink is 20% duty or less, the ink is printed using B K2, the ink of ⁇ 2 and 706 if it is 30% duty or more and 70% duty or less, or ⁇ 6 if it is 80% duty or more.
- the character signal was set.
- Comparative Example 2 a recorded matter was produced in the same manner as described above using ⁇ 6. ⁇ 6 was attached to each of the black ink position and photocyan ink position of the recording device. In all cases, printing was performed using BK 6 ink.
- Comparative Example 3 a recorded matter was produced in the same manner as described above using BK 3 and BK 6 in combination.
- BK 3 was installed at the black ink position and BK 6 was installed at the photo cyan ink position in the above recording device.
- B The print signal was set to print using the inks BK3 and BK6 for K3, 30% duty or more and 70% duty or less, and BK6 for 80% duty or more.
- Comparative Example 4 a recorded matter was produced in the same manner as described above using BK 2 and BK 9 in combination.
- BK 9 was installed at the black ink position and BK 2 was installed at the photo cyan ink position in the above recording device. Note that printing is performed using the following inks: BK2 for 20% duty or less, ⁇ 2 and ⁇ 9 for 30% duty or more and 70% duty or less, or ⁇ 9 for 80% duty or more.
- a print signal was set.
- AA Sufficient image density is obtained with all papers. + A: Although sufficient image density cannot be obtained with the — part of paper, there is no problem in actual use. B: A sufficient image density cannot be obtained with some paper.
- Example 6 As for the image density in Example 3 and Example 6, a better result was obtained in Example 6 using B K 8 having the same ratio of the poor solvent to the pigment.
- the color material is uniformly and stably dispersed in the ink.
- Example 8 and Comparative Example 5 were produced.
- an ink jet recording device BJF 90 0 manufactured by Canon having an on-demand type multi-recording head that ejects ink by applying thermal energy to the ink according to the recording signal is used.
- the one shown in Fig. 1 was modified so as to have a mechanism for applying the reaction liquid to the recording medium by a coating roller. Specifically, the reaction liquid was applied to the recording medium, and after the reaction liquid fixed on the recording medium, each ink was applied to the recording medium to form an image. In addition, the speed of the roller and the contact pressure of the roller to the recording medium were adjusted so that the amount of the reaction solution applied was 2.4 g / m 2 .
- the printer driver selected the default mode.
- the setting conditions for the default mode are as follows.
- the recording media used was the following copy paper that was left for 24 hours in an environment with a temperature of 23 ° C and humidity of 40%.
- Example 8 a recorded matter was produced in the same manner as described above using BK 2 and BK 6 in combination.
- BK 2 was installed at the black ink position of the above recording device, and BK 6 was installed at the photo's cyan ink position. Note that printing is performed using BK6 for 20% duty or less, ⁇ 6 and ⁇ 2 for 30% duty or more and 70% duty or less, or ⁇ 2 for 8'0% duty or more.
- the print signal was set.
- Comparative Example 5 a recorded matter was produced in the same manner as described above using a combination of ⁇ 2 and ⁇ 6. ⁇ ⁇ 2 was attached to the black ink position of the recording device, and ⁇ 6 was attached to the photo cyan ink position. Note that if the ink is 20% duty or less, the ink is printed using 2 K2, if it is 30% duty or more and 70% duty or less, ⁇ 2 and ⁇ 6, if it is 80% duty or more, use ⁇ ⁇ ⁇ 6. The character signal was set. ,
- Example 8 and Comparative Example 5 obtained above were evaluated in the same manner as described above for image density, graininess, and gradation.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Ink Jet (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2005800209321A CN1972809B (zh) | 2004-06-28 | 2005-06-28 | 记录方法、墨盒及图像形成方法 |
EP05755733.2A EP1726449B1 (en) | 2004-06-28 | 2005-06-28 | Recording method, ink cartridge and method for image formation |
US11/314,010 US7635182B2 (en) | 2004-06-28 | 2005-12-22 | Recording method, ink cartridge, and image-forming method |
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JP2004190546 | 2004-06-28 | ||
JP2004-190546 | 2004-06-28 |
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US11/314,010 Continuation US7635182B2 (en) | 2004-06-28 | 2005-12-22 | Recording method, ink cartridge, and image-forming method |
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WO2006001543A1 true WO2006001543A1 (ja) | 2006-01-05 |
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EP (1) | EP1726449B1 (ja) |
CN (1) | CN1972809B (ja) |
WO (1) | WO2006001543A1 (ja) |
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US20060103704A1 (en) | 2006-05-18 |
CN1972809B (zh) | 2011-09-07 |
EP1726449A4 (en) | 2014-04-09 |
EP1726449B1 (en) | 2016-06-29 |
EP1726449A1 (en) | 2006-11-29 |
CN1972809A (zh) | 2007-05-30 |
US7635182B2 (en) | 2009-12-22 |
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