JP2001271012A - Recording liquid and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pigment-based recording liquid capable of carrying out the recording without causing unevenness of recording and improved in preservation stability and to provide a method for using the recording liquid. SOLUTION: This recording liquid comprises a pigment, water and a compound having a hydrophilic site, a hydrophobic site and including functions. The compound having the including functions is at least one kind selected from cyclodextrins, steroids and calixarenes. A cyclodextrin represented by α-cyclodextrin, β-cyclodextrin or γ-cyclodextrin or the like or derivatives of the cyclodextrin are used as the cyclodextrins.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pigment-containing aqueous recording liquid suitable for an ink jet recording system and a method of using the same.

[0002]

2. Description of the Related Art Conventionally, as an ink for ink jet recording (recording liquid), a dye-based ink composition basically comprising a dye and an aqueous medium such as water has been known. It has been pointed out that these inks are inferior in light resistance and water resistance of printed matter due to the properties of the dye. In order to solve this problem, some inks using pigments instead of dyes have been put to practical use.

[0003] Ink-jet recording inks include, for example, 1) no change in physical properties during long-term storage;
2) characteristics such as not clogging fine nozzles; 3) high density and sharpness of the printed matter; 4) excellent storage stability (water resistance, light resistance, etc.) of the printed matter; . In particular, pigment-based inks have characteristics such as excellent storage stability (that is, long-term dispersion stability of the pigment) and the fact that nozzle clogging does not occur during printing or when restarting after printing is interrupted. Required.

[0004]

SUMMARY OF THE INVENTION For example, Japanese Patent Application Laid-Open No. Hei 6-2
No. 12106 discloses a technique in which a pigment is dispersed in a dispersion medium (solvent) using a dispersant to prepare a pigment dispersion, and the pigment dispersion is added to an ink composition to prepare a pigment-based ink. Is disclosed. As the dispersant, for example, polymer dispersants classified into proteins, natural rubbers, glucosides, and the like; surfactants classified into fatty acid salts, higher alkyl dicarboxylic acids, and the like are used. However, in many cases, these dispersants cause foaming of the ink, which adversely affects the ink ejection process. As a result, a problem of causing recording unevenness (print unevenness or the like) is caused.

Further, the pigment-based ink disclosed in the above-mentioned JP-A-6-212106 contains a resin emulsion as one of its compositions, and this resin may cause nozzle clogging. Therefore, there is a need to provide a highly reliable recording liquid (ink) having good properties without including the above-described polymer dispersant, surfactant, or resin emulsion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a pigment-based recording liquid capable of recording without recording unevenness and having improved storage stability. , And its use.

[0007]

In order to solve the above-mentioned problems, a recording liquid according to the present invention comprises a recording liquid containing a pigment and water, further comprising a hydrophilic portion and a hydrophobic portion. It is characterized by containing a compound having a contact function.

In order to solve the above-mentioned problems, the recording liquid according to the present invention contains at least one selected from cyclodextrins, steroids, and calixarenes as the compound having the inclusion function. It is characterized by consisting of

According to the above structure, since the pigment is included in the compound having an inclusion function, that is, for example, is included in the inside of a cyclodextrin ring, the dispersibility of the pigment, light and heat Storage stability (light and heat resistance)
It is possible to provide a recording liquid that is excellent in the above. in addition,
The recording liquid according to the present invention has excellent recording characteristics and fixability to a recording medium, and has excellent water resistance due to the use of a pigment as a recording material (printing, image, etc.).
Formation is possible. Further, since no polymer dispersant or surfactant is used for dispersing the pigment, the recording liquid does not foam, and has the characteristic that recording unevenness is unlikely to occur.

In order to solve the above-mentioned problems, the recording liquid according to the present invention comprises at least one selected from α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin as the cyclodextrin. It is characterized by comprising.

The recording liquid according to the present invention further comprises a derivative of α-cyclodextrin,
It is characterized in that at least one selected from β-cyclodextrin derivatives and γ-cyclodextrin derivatives is included as the above cyclodextrins.

According to any one of the above-mentioned constitutions, since α-, β-, γ-cyclodextrin or derivatives thereof which are easily available are used, it is possible to provide a recording liquid at a lower cost.

[0013] In order to solve the above-mentioned problems, the recording liquid according to the present invention is characterized in that at least one selected from bile acids and bile acid derivatives is contained as the steroid. .

[0014] According to the above configuration, since a readily available bile acid or a derivative thereof is used, it is possible to provide a recording liquid at a lower cost.

[0015] In order to solve the above-mentioned problems, the recording liquid according to the present invention is characterized in that at least one selected from calixarenes and derivatives of calixarenes is contained as the calixarenes. I have.

According to the above-mentioned structure, since a calixarene or a derivative thereof which is easily available is used, a recording liquid can be provided at a lower cost.

In order to solve the above-mentioned problems, the recording liquid according to the present invention is characterized in that the content of the compound having the inclusion function is in the range of 0.1% by weight to 40% by weight. And

According to the above configuration, it is possible to provide a recording liquid which is excellent in storage stability, recording characteristics, and fixability to a recording medium, and is capable of forming a recording having excellent water resistance. Further, this recording liquid has excellent ejection stability, and can be suitably used, for example, as a recording ink for an ink jet recording apparatus.

The recording liquid according to the present invention is further characterized by further comprising a wetting agent for solving the above-mentioned problems.

In order to solve the above-mentioned problems, the recording liquid according to the present invention is preferably such that the wetting agent comprises a polyhydric alcohol,
And amide group-containing compounds.

According to any one of the above-mentioned constitutions, it is possible to provide a recording liquid which is excellent in storage stability, recording characteristics and fixability to a recording medium, and is capable of forming a recording excellent in water resistance. . Also, if this recording liquid is used as a recording ink for an ink jet recording apparatus,
No clogging of nozzles and orifices due to drying of the ink.

In order to solve the above-mentioned problems, the recording liquid according to the present invention is characterized by further comprising a liquid organic compound having a low boiling point.

According to the above construction, it is possible to provide a recording liquid which has quick drying properties, is excellent in storage stability, recording characteristics, and fixability to a recording medium, and is capable of forming a recording having excellent water resistance. Becomes possible.

The method of using a recording liquid according to the present invention is characterized in that the above-mentioned recording liquid is used as a recording ink for an ink jet recording apparatus in order to solve the above-mentioned problems.

According to the above method, ink jet recording can be performed without causing nozzle clogging and printing unevenness. Further, at the time of ink jet recording, the fixing speed of the recording liquid to the recording medium is high, and in addition, a recorded image having high density and excellent water resistance can be provided.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Note that the present invention is not limited by this.

The recording liquid according to the present invention comprises: a) a pigment; b)
A compound having a hydrophilic part and a hydrophobic part and having an inclusion function; and c) at least water (more preferably ultrapure water). Here, the hydrophilic portion means a functional group having hydrophilicity and the like, and the hydrophobic portion means a functional group having hydrophobicity and the like. The compound having an inclusion function (hereinafter, referred to as an inclusion lattice compound) means a compound that forms an inclusion lattice by forming an inclusion lattice (host) and including a pigment (guest). The inclusion lattice compound is not particularly limited, but is preferably at least one selected from cyclodextrins, steroids, and calixarenes. One of these clathrate lattice compounds may be used alone, or two or more may be used as necessary.

The pigment is not particularly limited as long as it can be used as a recording material. Specific examples thereof include inorganic pigments such as carbon black; azo pigments (insoluble azo pigments, condensed azo pigments and the like). And organic pigments such as polycyclic pigments (for example, phthalocyanine pigments, quinacridone pigments, etc.).
One type of these pigments may be used, or two or more types may be used as needed.

When the pigment is in the form of particles, the particle size of the pigment is not particularly limited, but may be from 10 nm to 10 μm.
m, more preferably within a range of 10 nm to 0.1 nm.
More preferably, it is within the range of 1 μm. Although the reason for this is not clear, it is because the pigment is easily included in the inclusion lattice of the inclusion lattice compound such as cyclodextrins described below, that is, the inclusion lattice of the inclusion lattice compound. it is conceivable that. The proportion of the pigment in the recording liquid is not particularly limited, but is preferably in the range of 0.1% by weight (mass) to 10% by weight, more preferably 0.5% to 5% by weight. Is more preferably within the range.

Examples of the cyclodextrins include cyclodextrin in which a plurality of glucoses are bonded in a cyclic manner, and derivatives of the cyclodextrin. The derivatives of cyclodextrin referred to herein include 1) a modified cyclodextrin obtained by subjecting cyclodextrin to a desired chemical modification, and 2) a polymer formed by bonding of a plurality of cyclodextrin molecules (described later). Do)
And so on. It is known that these cyclodextrins have a property that the inside of the ring is hydrophobic and the outside is hydrophilic. In addition, only one type of cyclodextrin may be used, or two or more types may be used as necessary.

The number of glucoses constituting the above cyclodextrin is not particularly limited, but is generally 6
, 7, or 8 glucoses bound in a cyclic manner, that is, α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin are easily available. Therefore, the modified cyclodextrin generally refers to a cyclodextrin derivative obtained by chemically modifying α-, β-, or γ-cyclodextrin. By using the above α-, β-, γ-cyclodextrin or a derivative thereof as cyclodextrins, it is possible to provide the recording liquid according to the present invention at a lower cost.

The above-mentioned polymer formed by the bonding of a plurality of cyclodextrin molecules includes the following: 1) a polymer formed by condensation polymerization of hydroxyl groups between cyclodextrin molecules; ) Cyclodextrin molecules have an external chemical structure (eg,
(A cross-linking structure by a cross-linking agent, etc.). The number of cyclodextrins forming these polymers is not particularly limited, but from the viewpoint that they can be easily produced industrially and that the pigment can be included between cyclodextrin molecules, (That is, a dimer).

As the modified cyclodextrin, specifically, for example, the following general formula (1)

[0034]

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(Wherein R represents a hydrogen atom, an alkyl group, an amino group, or the like), and a modified -β-cyclodextrin represented by the following formula: In the general formula (1), only one of a plurality of hydroxyl groups of β-cyclodextrin is chemically modified, but two or more hydroxyl groups are chemically modified. May be applied.

As the above cyclodextrin polymer, specifically, for example,

[0037]

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(Wherein R ¹ and R ² represent —SS— (disulfide bond), —O— (ether bond), or —C— wherein a part of hydrogen atoms may be substituted by an amino group. _n H
_2n- (alkyl chain: n represents an integer of 1 or more)
The dimer of (beta) -cyclodextrin represented by these is mentioned.

Examples of the steroids include compounds having a perhydrocyclopentaphenanthrene ring (steroids) and derivatives of the steroids. Derivatives of steroids as used herein include 1) compounds having a steroid skeleton, including cholestane and coprostane with side chains, and 2) desired chemical modifications of steroids, such as steroid alcohols (sterols) or hydroxy acids. Means modified steroids and the like. It is known that these steroids have a property that the ring is hydrophobic and a hydroxyl group bonded to the ring is hydrophilic, and a pigment is formed by layering on each other. Include. In addition, only one type of steroid may be used, or two or more types may be used as needed.

As the steroids, bile acids, which are a kind of steroid hydroxy acids, and derivatives thereof are easily available. By using the above-mentioned bile acids and their derivatives as steroids, it becomes possible to provide the recording solution according to the present invention at lower cost.

Specific examples of the bile acids and derivatives thereof include, for example, the following structural formula group (4)

[0042]

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More than a thousand compound groups formed by combining structural formulas R _{1 to} R ₄ represented by the following formulas: In general steroids such as bile acids, skeletal isomers represented by the structural formula R ₁ in the structural formula group (4) (in alphabetical capital letters), the hydroxyl groups of the skeleton represented by the structural formula R ₂ the combination of the number and location (denoted by Roman numerals), the number of carbon atoms of the side chain represented by the structural formula R ₃ (denoted by Arabic numerals), and functional groups represented by the structural formula R ₄ (in alphabetical lowercase) Represents a specific compound. For example, cholic acid, which is well known as bile acid, is represented by (AI-3-a). Of the steroids, cholic acid is particularly preferred.

Examples of the calixarene include a cyclic compound (calixarene) obtained by reacting formaldehyde with a phenol derivative, and a derivative of the calixarene. From calix [4] arenes, which are tetramers, to calix arenes are known. The term “calixarene derivative” as used herein means 1) a modified calixarene obtained by subjecting a calixarene to a desired chemical modification. It is known that these calixarenes have a property that the ring having a flexible structure is hydrophobic and the inside (and outside) of the ring is hydrophilic. In addition, only one kind of calixarenes may be used, or two or more kinds thereof may be used as necessary.

Examples of the calixarenes include hexax calix [6] arene, octamer calix [8] arene, and derivatives thereof p
Hexasodium sulfonate and octasodium p-sulfonate are easily available. By using the above compounds and derivatives thereof as calixarenes, it becomes possible to provide the recording liquid according to the present invention at lower cost.

As the calixarene and its derivatives, specifically, for example, calix [4] arene and its derivatives represented by the following general formula (5) (where R ₀ is a hydrogen atom, an alkyl group, Or a nitro group, etc.), a calixarene which is a pentamer or more represented by the following general formula (6) and a derivative thereof (wherein R ₀ represents a hydrogen atom, an alkyl group, a nitro group, or the like;
₀ represents an arbitrary integer of 0 or more), a calixarene-p-sulfonic acid sodium salt represented by the following general formula (7), which is a kind of modified calixarene (wherein,
Represents any integer of 1 or more, and X represents any integer of 0 or more).

[0047]

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In the above formula (7), calixarene-p-sulfonic acid sodium salt is a hydrate when X is 1 or more, and is an anhydride when X is 0. When m is 3, calix [6] arene-p-sulfonic acid hexasodium salt is used, and when m is 5, calix [8] arene-p-sulfonic acid octasodium salt. Of calixarenes,
Calix [8] arene-p-sulfonic acid octasodium anhydride is particularly preferred.

The content ratio of the clathrate compound in the recording liquid is not particularly limited, but is in the range of 0.1% by weight to 40% by weight from the viewpoint of the dispersion stability of the pigment particles. Is more preferable. By setting the content of the clathrate lattice compound within the above range, storage stability (light resistance / heat resistance), recording characteristics, and fixability to a recording medium are excellent, and a recording formation excellent in water resistance is possible. It is possible to provide a suitable recording liquid. Further, this recording liquid has excellent ejection stability, and can be suitably used, for example, as a recording ink for an ink jet recording apparatus.

The recording liquid according to the present invention comprises the pigment and the clathrate compound dispersed in water. Although the ratio of water in the recording liquid is not particularly limited, it is more preferably in the range of 30% by weight to 95% by weight.
More preferably, it is in the range of 0% by weight to 95% by weight. The proportion of the total amount of the three components of the pigment, the clathrate lattice compound and the water in the recording liquid is not particularly limited, but is preferably 50% by weight to 98% by weight in order to include these three components as main components. It is more preferable to set it in the range.

In the recording liquid according to the present invention, the pigment is included in cyclodextrins, steroids, or calixarenes, which are inclusion lattice compounds.
More specifically, the pigment is included inside the cavity of the ring of, for example, cyclodextrins. The pigment is generally hydrophobic and is difficult to disperse alone in water. However, for example, by being included in the cavity of a ring of cyclodextrins, the dispersibility in water is improved. This is because the outside of the ring of cyclodextrin is hydrophilic. That is, the pigment is included in the inclusion lattice compound, so that the dispersibility in water is improved. In addition, the pigment coated with the clathrate lattice compound also has the effect of being superior in storage stability to light and heat (light resistance and heat resistance) as compared to the pigment alone.

When constructing the modified cyclodextrin described above, for example, a group having an affinity for the pigment is added to the inside of the ring of the cyclodextrin in order to ensure the inclusion of the pigment. Can also be introduced. As an example, when a naphthol azo pigment is used as a pigment, an amino group or the like may be introduced inside the cyclodextrin ring. When the affinity between cyclodextrin and water is adjusted, the above-mentioned modified cyclodextrin can be constituted by introducing a sulfonic acid group or the like outside or inside the ring of cyclodextrin.

It is more preferable that the recording liquid according to the present invention further contains a wetting agent. Preferred examples of the wetting agent include ethylene glycol, diethylene glycol,
Polyhydric alcohols such as triethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, butylene glycol, 1,2,6-hexanetriol, thioglycol, hexylene glycol, glycerin, trimethylolethane, and trimethylolpropane; urea; 2-pyrrolidone, N-methyl-
Amide group-containing compounds such as 2-pyrrolidone and 1,3-dimethyl-2-imidazolidinone; and the like. As the amide group-containing compound, a cyclic amide compound is more preferable. And among the above examples, polyhydric alcohols are more preferable, and glycols (dihydric alcohols) and glycerols (trihydric alcohols) are more preferable.
Diethylene glycol and glycerin are particularly preferred. It is most preferable to use urea, diethylene glycol and glycerin together.

By adding the above-mentioned wetting agent, it becomes possible to further improve the storage stability of the recording liquid, the recording characteristics, and the fixability to the recording medium. Further, if the recording liquid to which the wetting agent is added is used as a recording ink for an ink jet recording apparatus, clogging of nozzles and orifices due to drying of the ink does not occur. The amount of the wetting agent added is not particularly limited, but the proportion of the recording liquid in the recording liquid is 0.5% by weight to 40% by weight.
Is more preferably in the range of 2% by weight to 20% by weight.

The recording liquid further contains a wetting agent,
It is more preferable to include a liquid organic compound having a low boiling point. As such a liquid organic compound, preferably, for example, methyl alcohol, ethyl alcohol, n-propyl alcohol (97 ° C.), iso-propyl alcohol (82.4 ° C.), n-butyl alcohol (117.7)
° C), sec-butyl alcohol (98 ° C), tert
-Butyl alcohol (83 ° C.), iso-butyl alcohol (108 ° C.), n-pentyl alcohol (136 to
Monohydric alcohols such as 138 ° C); ethylene glycol monomethyl ether (124 to 125 ° C), ethylene glycol monoethyl ether (135 ° C), diethylene glycol monomethyl ether (194 ° C), diethylene glycol monoethyl ether (202 ° C), triethylene Glycol monomethyl ether (122 ° C),
Triethylene glycol monoethyl ether (256
° C), triethylene glycol monobutyl ether (1
Alcohol ethers such as 56 ° C.), and among the liquid organic compounds exemplified above, monohydric alcohols are particularly preferred. Further, as the alcohol ethers, triethylene glycol monobutyl ether is more preferable. The temperature in parentheses after each substance name is the boiling point of each substance.

By including the above-mentioned liquid organic compound, it is possible to give the recording liquid a quick drying property and to further improve the storage stability, the recording characteristics, and the fixability of the recording liquid to a recording medium. The amount of the liquid organic compound to be added is not particularly limited,
More preferably, the proportion of the recording liquid in the range of 0.5% by weight to 10% by weight, more preferably 1.5% by weight to 6% by weight.
Is more preferably within the range.

The recording liquid according to the present invention may further contain an appropriate additive, if necessary, for improving various physical properties of the recording liquid. Examples of the additive include a viscosity regulator, a surface tension regulator, a pH regulator such as triethanolamine, a fungicide, and a preservative. When the wetting agent, liquid organic compound, or additive described above is used, only one type may be used, or two or more types may be used as needed.

The recording liquid according to the present invention can be produced by dispersing and mixing each of the above-mentioned components (hereinafter, referred to as components of the recording liquid) in water by an appropriate method. Above all,
The mixture excluding liquid organic compounds and volatile components is
For example, a method in which a homogeneous composition is obtained by mixing with a suitable dispersing machine such as a ball mill, a sand mill, and an ultrasonic homogenizer, and then a liquid organic compound and a volatile component are added and mixed to obtain a recording liquid is more preferable.

After that, it is more preferable that the recording liquid is subjected to filtration or centrifugal separation in order to remove coarse particles and foreign substances that cause clogging during ink jet recording. The method of filtering the recording liquid is not particularly limited, but pressure reduction or pressure filtration using a metal filter, a membrane filter, or the like is more preferable.

The recording liquid according to the present invention is excellent in recording characteristics and fixability to a recording medium (such as paper), has a high fixing speed to a recording medium, and uses a pigment as a recording material. Records (printing, images, etc.) with excellent water resistance can be formed. In addition, a high density recording image is provided, and since a polymer dispersant and a surfactant are not used for dispersing the pigment, the recording liquid does not foam and the recording unevenness hardly occurs.

Although the use of the recording liquid according to the present invention is not particularly limited, as described above, the storage stability,
It has excellent properties such as excellent pigment dispersion stability, does not cause nozzle clogging, and has no recording unevenness. Therefore, it can be particularly suitably used as a recording ink for various inkjet recording apparatuses.

[0062]

The present invention will be described more specifically with reference to the following examples and comparative examples, but the present invention is not limited to these examples.

Example 1 The recording liquid according to the present example contains the following components of the recording liquid in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight α-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 2] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight β-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 3] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight γ-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 4] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment TONER MAGENTA E-02 (manufactured by Clariant Japan KK) 8% by weight α-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight % Ultrapure water 44.5% by weight First, the above components of the recording liquid composition except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are mixed and ultrasonically crushed. Using machine 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

Embodiment 5 The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment TONER MAGENTA E-02 (manufactured by Clariant Japan KK) 8% by weight β-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight % Ultrapure water 44.5% by weight First, the above components of the recording liquid composition except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are mixed and ultrasonically crushed. Using machine 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 6] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment TONER MAGENTA E-02 (manufactured by Clariant Japan KK) 8% by weight γ-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight % Ultrapure water 44.5% by weight First, the above components of the recording liquid composition except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are mixed and ultrasonically crushed. Using machine 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 7] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Cyanine blue KRO (manufactured by Sanyo Pigment Co., Ltd.) 8% by weight α-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 8] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Cyanine blue KRO (manufactured by Sanyo Color Co., Ltd.) 8% by weight β-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 9] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Cyanine blue KRO (manufactured by Sanyo Color Co., Ltd.) 8% by weight γ-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine More than 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 10] The recording liquid according to the present embodiment contains the following recording liquid components in a predetermined weight%. Carbon black M-800 (manufactured by Cablack Corporation) 8% by weight α-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, among the above-mentioned components of the recording liquid, the above-mentioned components except urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea and the like) were mixed, and an ultrasonic pulverizer was used. 2 using
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 11] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Carbon black M-800 (manufactured by Cablack Corporation) 8% by weight β-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, among the above-mentioned components of the recording liquid, the above-mentioned components except urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea and the like) were mixed, and an ultrasonic pulverizer was used. 2 using
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 12] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Carbon black M-800 (manufactured by Cablack Corporation) 8% by weight γ-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, among the above-mentioned components of the recording liquid, the above-mentioned components except urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea and the like) were mixed, and an ultrasonic pulverizer was used. 2 using
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

Embodiment 13 The recording liquid according to this embodiment contains the following recording liquid components in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight Cholic acid 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight At first, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether and triethanolamine (referred to as urea and the like) are mixed with each other in the above-mentioned recording liquid composition, and the mixture is mixed with an ultrasonic pulverizer. 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 14] The recording liquid according to this embodiment contains the following recording liquid components in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight Calix [8] arene-p-sulfonic acid octasodium salt anhydrous 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10 % By weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are excluded from the components of the above recording liquid. The above components were mixed and mixed with an ultrasonic pulverizer.
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 15] The recording liquid according to the present embodiment contains the following recording liquid components in a predetermined weight%. Pigment TONER MAGENTA E-02 (manufactured by Clariant Japan KK) 8% by weight Cholic acid 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine Over 0.5% by weight Pure water 44.5% by weight First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) in the above-mentioned recording liquid composition were mixed, and an ultrasonic pulverizer was used. Using 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 16] The recording liquid according to this embodiment contains the following recording liquid components in a predetermined weight%. Pigment TONER MAGENTA E-02 (manufactured by Clariant Japan KK) 8% by weight Calix [8] arene-p-sulfonic acid octasodium salt anhydrous 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol mono Butyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, among the components of the above recording liquid, urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, triethanolamine (referred to as urea, etc.) The above components are mixed except for
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 17] The recording liquid according to this embodiment contains the following recording liquid components in a predetermined weight%. Pigment Cyanine blue KRO (manufactured by Sanyo Color Co., Ltd.) 8% by weight Cholic acid 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight At first, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether and triethanolamine (referred to as urea and the like) are mixed with each other in the above-mentioned recording liquid composition, and the mixture is mixed with an ultrasonic pulverizer. 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 18] The recording liquid according to the present embodiment contains the following components of the recording liquid in a predetermined weight%. Pigment Cyanine blue KRO (manufactured by Sanyo Color Co., Ltd.) 8% by weight Calix [8] arene-p-sulfonic acid octasodium salt anhydrous 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10 % By weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are excluded from the components of the above recording liquid. The above components were mixed and mixed with an ultrasonic pulverizer.
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 19] The recording liquid according to the present embodiment contains the following recording liquid components in a predetermined weight%. Carbon black M-800 (manufactured by Cablack Co., Ltd.) 8% by weight Cholic acid 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultra pure 44.5% by weight of water First, the above-mentioned components except for urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea, etc.) are mixed with each other in the above-mentioned recording liquid composition, and an ultrasonic pulverizer is used. 2
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Embodiment 20] The recording liquid according to this embodiment contains the following recording liquid components in a predetermined weight%. Carbon black M-800 (manufactured by Cabrac Co., Ltd.) 8% by weight Calix [8] arene-p-sulfonic acid octasodium salt anhydrous 14% by weight Urea 6% by weight Diethylene glycol 10% by weight glycerin 7% by weight triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, among the components of the recording liquid, urea, diethylene glycol, glycerin, triethylene glycol monobutyl ether, and triethanolamine (referred to as urea and the like) were used. The above components were mixed together using an ultrasonic pulverizer.
This mixture was dispersed by irradiating ultrasonic waves of 0 kHz for 2 hours. Subsequently, the above-mentioned urea and the like were mixed with the mixture after dispersion, and the mixture was filtered through a 0.45 μm membrane filter to obtain the above-mentioned recording liquid as a filtrate.

[Comparative Example 1] The recording liquid according to the present comparative example contains the following recording liquid components in a predetermined weight%. Pigment Permanent Yellow GRY80 (manufactured by Clariant Japan KK) 8% by weight Sodium di (2-ethylhexyl) sulfosuccinate 0.02% by weight Urea 7% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight triethanol Amine 0.48% by weight Ultrapure water 57.5% by weight First, the above-mentioned recording liquid components were mixed, and the mixture was dispersed by irradiating ultrasonic waves of 20 kHz for 2 hours using an ultrasonic pulverizer. Subsequently, the mixture after dispersion was added to 0.45
The solution was filtered through a μm membrane filter to obtain a recording solution for comparison as a filtrate. The above sodium di (2-ethylhexyl) sulfosuccinate is an anionic surfactant manufactured by Kishida Chemical Co., Ltd.

[Comparative Example 2] The recording liquid according to this comparative example contains the following components of the recording liquid in a predetermined weight%. Dye CIacid red 52 (manufactured by Tokyo Chemical Industry Co., Ltd.) 8% by weight α-cyclodextrin 14% by weight Urea 6% by weight Diethylene glycol 10% by weight glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, the components of the above recording liquid were mixed, and the mixture was dispersed by irradiating an ultrasonic wave of 20 kHz for 2 hours using an ultrasonic pulverizer. Subsequently, the mixture after dispersion was added to 0.45
The solution was filtered through a μm membrane filter to obtain a recording solution for comparison as a filtrate.

Comparative Example 3 The recording liquid according to this comparative example contains the following components of the recording liquid in a predetermined weight%. Dye CIacid red 52 (manufactured by Tokyo Chemical Industry Co., Ltd.) 8% by weight Cholic acid 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight Triethanolamine 0.5% by weight Ultra pure Water 44.5% by weight First, the above-mentioned recording liquid composition was mixed, and the mixture was dispersed by irradiating an ultrasonic wave of 20 kHz for 2 hours using an ultrasonic pulverizer. Subsequently, the mixture after dispersion was added to 0.45
The solution was filtered through a μm membrane filter to obtain a recording solution for comparison as a filtrate.

[Comparative Example 4] The recording liquid according to this comparative example contains the following components of the recording liquid in a predetermined weight%. Dye CIacid red 52 (manufactured by Tokyo Chemical Industry Co., Ltd.) 8% by weight Calix [8] arene-p-sulfonic acid octasodium anhydride 14% by weight Urea 6% by weight Diethylene glycol 10% by weight Glycerin 7% by weight Triethylene glycol monobutyl ether 10% by weight triethanolamine 0.5% by weight Ultrapure water 44.5% by weight First, the components of the above recording liquid were mixed, and the mixture was irradiated with ultrasonic waves of 20 kHz for 2 hours using an ultrasonic pulverizer. Dispersed. Subsequently, the mixture after dispersion was added to 0.45
The solution was filtered through a μm membrane filter to obtain a recording solution for comparison as a filtrate.

The properties of the recording liquids obtained in Examples 1 to 20 and Comparative Examples 1 to 4 were evaluated by the following methods.

A) Clogging Characteristics An ink jet printer PM-750C (ink jet recording device manufactured by Seiko Epson Corporation) was filled with the above recording liquid, and printing was continuously performed for one hour. Then, the printing operation was stopped. Subsequently, after leaving the printer at room temperature for one day without capping the head, the nozzle cleaning operation and the printing operation are repeated until printing equivalent to that at the time of the initial filling of the recording liquid is performed, and the clogging characteristic of the recording liquid is obtained. Was evaluated.

The evaluation of the clogging characteristics was carried out by visual evaluation in three steps. More specifically, a case where printing equivalent to that at the beginning of the recording liquid filling was possible with the cleaning operation of 0 to 5 times is "O", and printing equivalent to the initial state of the recording liquid filling is performed by 6 to 11 cleaning operations. "△" when possible, 12
A case where printing equivalent to that at the time of initial filling of the recording liquid was not possible even after performing the cleaning operation more than once was evaluated as “×”.

B) Storage stability 50 ml of the above recording solution was placed in a Laborun screw tube bottle and allowed to stand at room temperature for 30 days, and the presence or absence of sediment was examined. The evaluation of the storage stability was performed by a two-step visual evaluation. More specifically, those with no sediment were evaluated as “○”, and those with sediment were evaluated as “x”.

C) Water Resistance Using the above-mentioned ink jet printer PM-750C, printing was performed on high quality paper, and the high quality paper after recording was immersed in water to examine the change in the recording state. The evaluation of the water resistance was performed by a two-stage evaluation by visual observation. More specifically, a mark that did not cause any change in the recording state was evaluated as “○”, and a change in the recording state, such as blurred printing or reduced print density, was evaluated as “x”.

D) Light Resistance First, 50 ml of the above recording solution was placed in a Laboran screw tube bottle, and its ultraviolet spectral characteristics were measured. Subsequently, 50 ml of the recording liquid was allowed to stand under sunlight for 90 days, and its ultraviolet spectral characteristics were measured again. Then, the presence or absence of discoloration of the recording liquid was examined by comparing the ultraviolet spectral characteristics before and after standing. The light resistance was evaluated in two steps. More specifically, those having no discoloration were evaluated as “○”, and those having discoloration were evaluated as “×”.

The above Examples 1 to 20 and Comparative Examples 1 to
The characteristics of the recording liquid according to Example No. 4 were arranged, and the results shown in Table 1 below were obtained.

[0094]

[Table 1]

As is clear from the results shown in Table 1, no particular problem of clogging was observed in the recording liquids obtained in Examples 1 to 20 and Comparative Examples 1 to 4. But,
The recording liquid according to the present invention was found to be more excellent in storage stability, water resistance, and light resistance.

[0096]

As described above, the recording liquid according to the present invention has a constitution comprising a pigment, water and a compound having a hydrophilic part and a hydrophobic part and having an inclusion function.

The recording liquid according to the present invention comprises at least one selected from cyclodextrins, steroids, and calixarenes as a compound having the inclusion function, in addition to the above-mentioned constitution. It is.

According to the above structure, since the pigment is included in the compound having an inclusion function, that is, for example, included in the inside of a cyclodextrin ring, the dispersibility of the pigment, light and heat Storage stability (light and heat resistance)
This makes it possible to provide an excellent recording liquid.

The recording liquid according to the present invention comprises at least one selected from α-, β-, γ-cyclodextrin as the above-mentioned cyclodextrins in addition to the above-mentioned constitution.

The recording liquid according to the present invention contains, in addition to the above-mentioned constitution, at least one selected from derivatives of any of α-, β-, γ-cyclodextrin as the above-mentioned cyclodextrins. Configuration.

The recording liquid according to the present invention has, in addition to the above-mentioned constitution, at least one kind selected from bile acids and derivatives thereof as the above-mentioned steroids.

The recording liquid according to the present invention has, in addition to the above configuration, at least one selected from calixarenes and derivatives thereof as the calixarenes.

According to any one of the above structures, the recording liquid according to the present invention can be provided at a lower cost.

In the recording liquid according to the present invention, in addition to the above-mentioned constitution, the content of the compound having the inclusion function is 0.1%.
The configuration is within a range of 1% by weight to 40% by weight.

The recording liquid according to the present invention has a structure further comprising a wetting agent in addition to the above structure.

The recording liquid according to the present invention has a configuration in which, in addition to the above configuration, the wetting agent is at least one selected from polyhydric alcohols and amide group-containing compounds.

According to any one of the above constitutions, it is possible to provide a recording liquid which is excellent in storage stability, recording characteristics, and fixability to a recording medium, and is capable of forming a recording with excellent water resistance. The effect is also achieved.

The recording liquid according to the present invention has, in addition to the above constitution, a liquid organic compound having a low boiling point.

According to the above construction, it is possible to provide a recording liquid which has quick drying properties, is excellent in storage stability, recording characteristics, and fixability to a recording medium, and is capable of forming a recording having excellent water resistance. And the effect that it becomes possible.

The method of using the recording liquid according to the present invention is a method of using the above recording liquid as a recording ink for an ink jet recording apparatus as described above.

According to the above-described method, there is an effect that ink jet recording can be performed without causing nozzle clogging and uneven printing.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kenjiro Waku, 22-22, Nagaikecho, Abeno-ku, Osaka-shi, Osaka F-term (reference) 2C056 EA04 EA13 FC01 FC02 2H086 BA52 BA53 BA55 BA59 BA60 BA62 4J039 AB01 BE01 BE06 GA24

Claims (11)

[Claims] 1. A recording liquid comprising a pigment and water, further comprising a compound having a hydrophilic part and a hydrophobic part and having an inclusion function. 2. The recording liquid according to claim 1, comprising at least one selected from cyclodextrins, steroids, and calixarenes as the compound having the inclusion function. 3. The recording liquid according to claim 2, wherein at least one selected from the group consisting of α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin is contained as the cyclodextrin. . 4. The method according to claim 1, wherein at least one selected from the group consisting of α-cyclodextrin derivatives, β-cyclodextrin derivatives, and γ-cyclodextrin derivatives is included as the cyclodextrins. 3. The recording liquid according to 2. 5. The recording liquid according to claim 2, wherein at least one selected from bile acids and bile acid derivatives is contained as said steroids. 6. The recording liquid according to claim 2, comprising at least one selected from calixarenes and derivatives of calixarenes as the calixarenes. 7. The recording according to claim 1, wherein the content of the compound having the inclusion function is in the range of 0.1% by weight to 40% by weight. liquid. 8. The recording liquid according to claim 1, further comprising a wetting agent. 9. The recording liquid according to claim 8, wherein the wetting agent is at least one selected from polyhydric alcohols and amide group-containing compounds. 10. The recording liquid according to claim 1, further comprising a liquid organic compound having a low boiling point. 11. A method for using a recording liquid, wherein the recording liquid according to claim 1 is used as a recording ink for an ink jet recording apparatus.