JP2010235764A - Edible ink and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve whiteness so as to produce ink having whiteness comparable to that obtained by using titanium dioxide even when using shell as an edible pigment. <P>SOLUTION: A white edible pigment including shell powders is mixed with a solvent containing a spreading agent and a wetting agent to produce a liquid edible white ink to be coated onto an object. The edible pigment includes a calcium carbonate powder having a particle diameter of ≤20 μm which is obtained by heat treatment of shells at 160-400°C. Desirably, the edible pigment is obtained by heat treatment of shells at 180-380°C. More desirably, the edible pigment is obtained by heat treatment of shells at 250-380°C. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an edible ink and a method for producing an edible ink for application to an object such as various foods and medicines such as fruits and vegetables by printing or the like, and in particular, using shell powder. The present invention relates to a white edible ink and a method for producing a white edible ink.

Conventionally, as this type of edible ink, for example, a technique described in Patent Document 1 (Japanese Patent Laid-Open No. 2005-314697) is known.
This is a white edible ink made by mixing a white edible pigment made of shellfish powder with a solvent containing a spreading agent and a wetting agent. An edible pigment having a calcium content of 38% or more and a particle size of 1 to 8 μm as a powder under pulverization is produced by mixing with baby milk as a spreading agent and glycerin as a wetting agent in ethanol. And using this kind of edible ink, for example, it prints on food with an inkjet printer.

JP-A-2005-314697

By the way, in the above-mentioned conventional edible ink, the white portion of the shellfish is made into a finely pulverized powder as an edible pigment, and therefore it tends to be gray and inferior in whiteness as compared with a pigment-based ink using titanium dioxide. There was a problem. On the other hand, with the recent environmental harmony and health food boom, there is an image that products derived from biological resources (shells, etc.) are more safe than mineral resources (titanium dioxide, zinc white, etc.). There is a fact that needs are increasing.
The present invention has been made in view of the above-mentioned problems. Even when a shell is used as an edible pigment, the whiteness is improved so that a white color comparable to that using titanium dioxide is exhibited. An object of the present invention is to provide an edible ink and a method for producing the edible ink.

The edible ink of the present invention for achieving such an object is produced in a liquid state by mixing a white edible pigment comprising a shell powder with a solvent containing a spreading agent and a wetting agent. In the white edible ink to be applied, the edible dye is composed of calcium carbonate powder having a particle size of 20 μm or less by heat-treating the shell at 160 ° C. to 400 ° C.
Desirably, the shell is heated at 180 ° C. to 380 ° C. with the edible pigment. More preferably, the edible pigment is heat-treated at 250 ° C. to 380 ° C. for the shell.
As the shell, one or more of various shells such as oysters, scallops, clams, swordfish shells, pearl oysters, and abalone shells can be used.

As a result, the edible dye changes from light gray to white, and even when compared with titanium dioxide, the same degree of reflectance and chromaticity are obtained, and there is no fading and the whiteness is improved.
When this edible ink is applied to the object, the edible ink is applied to the object by an appropriate means such as well-known pad printing, screen printing, ink jet printer printing, or the like.

  Here, examples of the object include objects that are mainly ingested or touched by the human body such as various foods and medicines. As food, various fruits such as apples, bananas, mandarin oranges, lemons, vegetables, cookies, biscuits, pies, chocolate, candy, caramel, chewing gum, jelly, rice crackers, sweets such as potato chips, cheese, butter, etc. Dairy products, eggs, ham, sausages, kamaboko, chikuwa and other fish products. Examples of pharmaceuticals include tablets and capsules. Moreover, an edible sheet | seat is mentioned as a target object. An edible ink may be applied to the sheet, and the applied sheet may be attached to another object such as food.

  Examples of spreading agents include shellac, vegetable wax (eg, carnauba wax, candelilla wax, wood wax, rice wax, etc.), methyl cellulose, carboxymethyl cellulose calcium, sodium carboxymethyl cellulose, sodium alginate, propylene glycol alginate, starch glycol Examples thereof include sodium acid, starch phosphate sodium, sodium polyacrylate, pullulan, gum arabic, ester gum, pectin, duran gum, xanthan gum, and carrageenan.

  Examples of the wetting agent include glycerin, propylene glycol, sorbitol, saccharides, and other edible solvents, which can be used alone or in combination of two or more.

When the spreader and / or wetting agent cannot form a liquid, a solvent that dissolves the edible dye, the spreading agent, and the wetting agent is used. Examples of the solvent include ethanol, geraniol, sclareol and the like.
In addition, additives such as fatty acid ester surfactants, pH adjusters, silicone antifoaming agents and preservatives can be added as necessary.

In addition, the method for producing an edible ink of the present invention for achieving the above object is produced in a liquid state by mixing a white edible pigment comprising a shell powder with a solvent containing a spreading agent and a wetting agent, In a method for producing an edible ink that is a white edible ink that is applied to an object,
When producing the edible pigment, the shell is pulverized so that the particle size is 3 mm or less, and the pulverized powder is heat-treated at 160 ° C. to 400 ° C. and then further pulverized to produce particles. The calcium carbonate powder has a diameter of 20 μm or less.
According to the edible ink produced by such a production method, the edible dye changes from light gray white to white, and even when compared with titanium dioxide, the same degree of reflectance and chromaticity is obtained, and there is no discoloration. The whiteness is improved.

Another method of producing an edible ink according to the present invention is that a white edible pigment composed of shell powder is mixed with a solvent containing a spreading agent and a wetting agent to form a liquid, which is applied to an object. In the method for producing edible ink to be white edible ink,
When producing the edible pigment, the shell is pulverized so that the particle size is 3 mm or less, and the pulverized powder is heat-treated at 160 ° C. to 400 ° C., and then at 800 ° C. to 1200 ° C. Calcination is performed by calcining, and then the calcium oxide is poured into water to form calcium hydroxide. Next, carbon dioxide is blown into the calcium hydroxide solution to precipitate calcium carbonate. Calcium is collected and then the particle size is adjusted to obtain calcium carbonate powder having a particle size of 10 μm or less.
According to the edible ink produced by such a production method, the edible dye changes from light gray white to white, and even when compared with titanium dioxide, the same degree of reflectance and chromaticity is obtained, and there is no discoloration. The whiteness is improved. This edible ink is suitable as an ink for an ink jet printer because the particle size of the edible dye is fine.

  In this case, the collected calcium carbonate is put into a sorbitol solution, stirred, allowed to stand for a predetermined time after stirring, the floating part of the solution is taken out, and the particle size is reduced to 10 μm or less by the centrifuge. It is effective to have a configuration in which calcium carbonate is extracted. Further, fine particles with high whiteness can be obtained.

  And in said manufacturing method, when producing | generating the said edible pigment, a shell is grind | pulverized so that a particle size may be 3 mm or less, and this grinded granular material is heat-processed at 180 to 380 degreeC. Is desirable. More desirably, when the edible pigment is produced, the shell is pulverized so as to have a particle size of 3 mm or less, and the pulverized powder is heat-treated at 250 ° C to 380 ° C. The whiteness can be further increased.

  According to the present invention, the shell is heat-treated at 160 ° C. to 400 ° C., preferably 180 ° C. to 380 ° C., more preferably 250 ° C. to 380 ° C., and calcium carbonate powder having a particle size of 20 μm or less is edible dye. Therefore, the edible pigment turns from light gray white to white, and even when compared with titanium dioxide, the same degree of reflectance and chromaticity can be obtained, and there is no fading and the whiteness can be improved.

It is process drawing which shows the manufacturing method of the edible ink which concerns on embodiment of this invention. It is process drawing which shows the application | coating method of the edible ink which concerns on embodiment of this invention. It is a table | surface which shows Examples 1-6 of the edible ink which concerns on the Example of this invention with a comparative example, and shows the test result regarding the reflectance and chromaticity which concern on Experimental Example 3. FIG. It is a table | surface which concerns on Experimental example 1 and shows the color tone change of the calcium carbonate by the difference in the heating temperature of a shell. It is a table | surface figure which concerns on the experiment example 2 and shows the influence which the sorbitol solution density | concentration has on the particle size production | generation of a calcium carbonate. 4 is a drawing-substituting micrograph showing the particle state of the produced calcium carbonate according to Experimental Example 2. It is a figure which shows the state which applied the edible ink which concerns on Experimental Example 4,5,7,8,9 to the Example on the apple.

Hereinafter, an edible ink and an edible ink manufacturing method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a process diagram showing a method for producing edible ink according to an embodiment of the present invention.
An edible ink according to an embodiment of the present invention is produced in a liquid state by mixing an edible dye with a solvent containing a spreading agent and a wetting agent, and is applied to an object by printing or the like. This white edible ink is obtained by mixing a white edible pigment made of the above powder with a solvent containing a spreading agent and a wetting agent to form a liquid.

  As the shell, one or more of various shells such as oysters, scallops, clams, swordfish shells, pearl oysters, and abalone shells can be used. In the embodiment, a scallop is used.

  In addition, as the edible ink according to the embodiment of the present invention, the coated material is non-reactive with a solvent containing an edible dye, a spreading agent, and a wetting agent, and is applied to an object. Some have added a foaming agent that reacts with a reactive agent attached to the foam to foam the coating.

And in embodiment, using FIG. 1, a shell is heat-processed at 160 degreeC-400 degreeC, and makes the powder of calcium carbonate whose particle size is 20 micrometers or less, This powder is comprised as an edible pigment | dye. The shell is preferably heat-treated at 180 ° C to 380 ° C, more preferably 250 ° C to 380 ° C.
In the embodiment, as shown in FIG. 1, heavy calcium carbonate fine particles adjusted to 5 μm to 20 μm as edible dyes, and the production method is different from this heavy calcium carbonate fine particles, and adjusted to 0.1 μm to 10 μm. At least one of light calcium carbonate is used. Light calcium carbonate is suitable for inkjet printers.

Here, the production process for producing each edible pigment will be described. The production methods for heavy calcium carbonate and light calcium carbonate are different.
(A) Production of heavy calcium carbonate fine particles As shown in FIG. 1, the shell is washed with water and then pulverized to a particle size of 3 mm or less using a known pulverizer, preferably 1 mm to 2 mm or less. Grind into. Next, the pulverized powder is heat-treated at 160 ° C. to 400 ° C. using an external heating rotary furnace. Desirably, heat treatment is performed at 180 ° C. to 380 ° C., and more desirably at 250 ° C. to 380 ° C.

  Then, it grinds further. This pulverization is performed by using an apparatus for forming fine particles, for example, a jet mill or a wet mill to form calcium carbonate powder having a particle size of 20 μm or less. Then, if necessary, powder having a particle size in the range of 5 μm to 20 μm is extracted by a known method such as filtration or centrifugation.

(B) Production of light calcium carbonate As shown in FIG. 1, the shell is washed with water and then pulverized to a particle size of 3 mm or less using a known pulverizer, preferably pulverized to 1 mm to 2 mm or less. To do. Next, the pulverized powder is heat-treated at 160 ° C. to 400 ° C. using an external heating rotary furnace. Desirably, heat treatment is performed at 180 ° C. to 380 ° C., and more desirably at 250 ° C. to 380 ° C.

  Next, it is calcined at 800 ° C. to 1200 ° C. to make calcium oxide by a known calcining apparatus. Next, this calcium oxide is poured into water to form calcium hydroxide. Next, while stirring the calcium hydroxide solution, carbon dioxide gas is blown into the calcium hydroxide solution to form calcium carbonate, which is then precipitated. The precipitated calcium carbonate is then collected. Thereafter, the particle size is adjusted to obtain calcium carbonate powder having a particle size of 10 μm or less.

  The particle size is adjusted as follows. The collected calcium carbonate is put into a sorbitol solution and stirred, and is allowed to stand for a predetermined time after stirring. Then, the floating part of the stationary solution is taken out. Finally, calcium carbonate having a particle size of 10 μm or less is extracted from the extracted solution by a centrifugal separator. Then, if necessary, a powder having a particle size in the range of 0.1 μm to 10 μm is extracted by a known method such as filtration. When used in an inkjet printer, it is desirable to extract a powder having a particle size in the range of 0.1 μm to 1 μm.

Further, as shown in FIG. 1, as the spreading agent, anhydrous ones were selected in relation to the foaming agent and the reactive agent described later, and carnauba wax that was shellac or vegetable wax was used.
As the wetting agent, an anhydrous one was selected in relation to a foaming agent and a reactive agent described later, and glycerin was used.
Moreover, the solvent for making an edible dye, a spreading agent, and a wetting agent into a liquid was used. As the solvent, an anhydrous solvent was selected in relation to the foaming agent and the reactant described later, and ethanol was used.

And as shown in FIG. 1, while using said heavy calcium carbonate microparticles | fine-particles (A) or light calcium carbonate (B), required mixing is performed using said spreading agent and wetting agent, and white Obtain edible ink.
As an embodiment, as shown in FIG. 1, an edible ink of ink composition I containing no foaming agent, an edible ink of ink composition II comprising a solvent as an anhydrous solvent and a foaming agent as an alkaline salt, The edible ink of ink composition III in which the solvent is composed of an anhydrous solvent and the foaming agent is composed of acidic salts, and the ink composition IV that is composed of the solvent is composed of an anhydrous solvent and the foaming agent is composed of alkaline salts and acidic salts. There is edible ink.

Next, in the embodiment of the present invention, the solvent is non-reactive with the solvent containing the edible dye, the spreading agent, and the wetting agent, and is a reaction that is attached to the coated material applied to the object. What added the foaming agent which reacts with an agent and foams a coating material by generation | occurrence | production of gas is demonstrated in detail.
Examples of the combination of the foaming agent and the reactive agent include the following embodiments.

(1) Combination 1 (see ink composition II)
The foaming agent is composed of alkaline salts, and the reactive agent is an acidic solution that reacts with alkaline salts. Here, as the solvent containing the edible dye, the spreading agent, and the wetting agent, an anhydrous solvent is selected in relation to the foaming agent and the reactive agent.
In this configuration, the alkaline salt is not particularly limited as long as it can be used as a food additive, but a salt of organic acid or inorganic acid exhibiting alkalinity is preferably used. For example, as the alkaline salt, one or more kinds are selected from sodium bicarbonate, sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate, sodium hydroxide, potassium hydroxide and the like.
The acidic solution is not particularly limited as long as it can be used as a food additive, and for example, at least one kind is selected from a citric acid solution, a lactic acid solution, an acetic acid solution, and the like.
In the embodiment, as the alkaline salt, for example, sodium bicarbonate or baking powder was used.
Baking powder is composed of sodium bicarbonate, potassium hydrogen carbonate, calcium hydrogen carbonate, wheat flour, etc. using an edible material, and is mixed with bread making, cakes, etc., and then foamed and swollen by heat treatment.
For example, a citric acid solution was used as the acidic solution.

(2) Combination 2 (see ink composition III)
The foaming agent is composed of acidic salts, and the reactive agent is an alkaline solution that reacts with acidic salts. Here, as the solvent containing the edible dye, the spreading agent, and the wetting agent, an anhydrous solvent is selected in relation to the foaming agent and the reactive agent.
In this configuration, the acid salts are not particularly limited as long as they can be used as food additives, but salts of organic acids or inorganic acids exhibiting acidity are preferably used. For example, at least one selected from citric acid, lactic acid, acetic acid and the like is selected.
The alkaline solution is not particularly limited as long as it can be used as a food additive. For example, at least one selected from a sodium bicarbonate solution and a calcium hydroxide solution is selected.
In the embodiment, for example, citric acid or lactic acid was used as the acid salt. As the alkaline solution, for example, a sodium bicarbonate solution was used.

(3) Combination 3 (see ink composition IV)
The foaming agent is composed of alkaline salts and acidic salts, and the reactant is water. Here, as the solvent containing the edible dye, the spreading agent, and the wetting agent, an anhydrous solvent is selected in relation to the foaming agent and the reactive agent.
As the alkaline salt, for example, sodium bicarbonate was used. As acid salts, for example, citric acid and lactic acid were used.

More specifically, the edible ink according to the embodiment is as follows.
(1) First Embodiment 40-55 wt% heavy calcium carbonate having a particle size of 5 μm to 20 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol Composition.
(2) Second embodiment 40-55 wt% light calcium carbonate having a particle size of 0.1 μm to 10 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol It was composed of
(3) Third Embodiment 35 to 45% by weight of light calcium carbonate having a particle size of 0.1 μm to 0.5 μm, 10 to 20% by weight of vegetable wax, 15 to 25% by weight of glycerin, and 10 of ethanol Composition composed of ˜25% by weight.

(4) Fourth Embodiment 40-55 wt% heavy calcium carbonate having a particle size of 5 μm to 20 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol, Composition composed of 2-15% by weight of alkaline salt (sodium bicarbonate, baking powder).
After printing, the coated product is foamed by spraying an acidic solution of 2 to 15% by weight of weak acid salts (citric acid, lactic acid, etc.).
(5) Fifth embodiment 40-55 wt% light calcium carbonate having a particle size of 0.1 μm to 10 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol , Composed of 2-15% by weight of an alkaline salt (sodium bicarbonate or baking powder).
After printing, the coating is foamed by spraying an acidic solution of 2 to 15% by weight weak acid salts (such as citric acid or lactic acid).
(6) Sixth Embodiment 35 to 45% by weight of light calcium carbonate having a particle size of 0.1 to 0.5 μm, 10 to 20% by weight of vegetable wax, 15 to 25% by weight of glycerin, and 10 of ethanol. -25% by weight, composed of 2-15% by weight of alkaline salt (sodium bicarbonate or baking powder).
After printing, the coating is foamed by spraying an acidic solution of 2 to 15% by weight weak acid salts (such as citric acid or lactic acid).

(7) Seventh Embodiment 40-55 wt% heavy calcium carbonate having a particle size of 5 μm to 20 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol, A composition composed of 2 to 15% by weight of a weak acid salt (citric acid or lactic acid).
After printing, the coating is foamed by spraying 2-15% by weight alkaline solution (sodium bicarbonate solution).
(8) Eighth Embodiment Light calcium carbonate having a particle size of 0.1 μm to 10 μm is 40 to 55 wt%, shellac is 7 to 14 wt%, glycerin is 5 to 40 wt%, and ethanol is 13 to 26 wt%. A composition composed of 2 to 15% by weight of a weak acid salt (citric acid or lactic acid).
After printing, the coating is foamed by spraying 2-15% by weight alkaline solution (sodium bicarbonate solution).
(9) Ninth Embodiment 35 to 45% by weight of light calcium carbonate having a particle size of 0.1 μm to 0.5 μm, 10 to 20% by weight of vegetable wax, 15 to 25% by weight of glycerin, and 10 of ethanol Composition composed of ˜25% by weight and weak acid salt (citric acid or lactic acid) at 2 to 15% by weight.
After printing, the coating is foamed by spraying 2-15% by weight alkaline solution (sodium bicarbonate solution).

(10) Tenth Embodiment 40-55 wt% heavy calcium carbonate having a particle size of 5 μm to 20 μm, 7-14 wt% shellac, 5-40 wt% glycerin, 13-26 wt% ethanol, A composition composed of 2 to 15% by weight of an alkaline salt (sodium bicarbonate or baking powder) and 2 to 15% by weight of a weakly acidic salt (such as citric acid or lactic acid).
After printing, the coating is foamed by spraying water.
(11) Eleventh Embodiment Light calcium carbonate having a particle size of 0.1 μm to 10 μm is 40 to 55 wt%, shellac is 7 to 14 wt%, glycerin is 5 to 40 wt%, and ethanol is 13 to 26 wt%. And 2-15% by weight of an alkaline salt (sodium bicarbonate or baking powder) and 2-15% by weight of a weakly acidic salt (citric acid or lactic acid).
After printing, the coating is foamed by spraying water.
(12) Twelfth Embodiment 35 to 45% by weight of light calcium carbonate having a particle diameter of 0.1 to 0.5 μm, 10 to 20% by weight of vegetable wax, 15 to 25% by weight of glycerin, and 10 of ethanol. Composition composed of ˜25% by weight, 2-15% by weight of alkaline salt (sodium bicarbonate or baking powder), and 2-15% by weight of weakly acidic salt (such as citric acid or lactic acid).
After printing, the coating is foamed by spraying water.

Next, a method for applying edible ink according to an embodiment of the present invention will be described.
In the first to third embodiments, the edible ink is applied to the object by an appropriate means such as well-known pad printing, screen printing, ink jet printer printing, or the like. In this case, the edible dye changes from light gray white to white, and even when compared with titanium dioxide, the same degree of reflectance and chromaticity are obtained, and there is no discoloration and the whiteness is improved.

In the fourth to twelfth embodiments, as shown in FIG. 2, first, edible ink is first applied to the object by a suitable means such as well-known pad printing, screen printing, ink jet printer printing, or the like. Application is performed to form an application on the surface of the object (FIG. 2 (a)). Then, a reactive agent is made to adhere to a coated material. Adhesion to the coated material is desirable as long as the coated material is not yet dried. This adhesion is performed by an appropriate means such as applying with a brush, instilling, or spraying with a sprayer (FIG. 2 (b)). In the case of spraying, the reactants are evenly attached to the coated material, which is efficient. As a result, the foaming agent and the reactive agent in the coated product react to foam the coated product (FIG. 2C). Therefore, as shown in FIG.2 (c), a coating material expand | swells and a volume increases, it becomes a thick and three-dimensional form, and a coating material comes to be emphasized. For example, even a coating material having a thickness of several tens of μm can be made to have a thickness of about 1 to 3 mm by foaming.
Further, in this case, since the applied material can be foamed by a simple operation of simply attaching the reactant to the applied material, the operation can be performed very easily and workability can be improved.
The edible ink according to the present embodiment can be used without necessarily being foamed. That is, an edible ink is applied to an object to form an application on the surface of the object, and then dried without attaching a reactant. As a result, the edible ink is fixed and can be held at a thickness of several tens of μm.

Next, an example is shown. In the examples, two types of calcium carbonate, heavy calcium carbonate made of scallop shells and light calcium carbonate, were used.
As heavy calcium carbonate, as shown in FIG. 1, scallop shells are washed with water, pulverized to 1 mm to 2 mm, and pulverized in an externally heated rotary furnace, and the granular material obtained at a temperature of 250 ° C. Using a dry high-speed rotary impact pulverizer (N-COS-1, manufactured by Nara Machinery Co., Ltd.), which is an apparatus for finely pulverizing each of the obtained fired products, the particle size is adjusted to 5 μm to 20 μm. It was adjusted.
As light calcium carbonate, as shown in FIG. 1, scallop shells are washed with water and then crushed to 1 mm to 2 mm, fired at 1000 ° C. in an external heating rotary furnace, and 10 g to 20 g of the fired powder is distilled. Throw in 1000 ml of water and throw the carbon dioxide into bubbling water at 300 rpm while collecting the precipitate. Place 1000 ml of 15.0 wt% sorbitol solution in a beaker prepared in advance and place the precipitate in the beaker. The mixture was allowed to stand for 5 hours after stirring, and the floating part was centrifuged at 8000 rpm for 60 minutes using a centrifuge to obtain a precipitate (light calcium carbonate). The particle size was about 0.5 μm to 5 μm.

As shown in FIG. 3, edible inks according to the following examples were produced using these heavy calcium carbonate or light calcium carbonate.
<Example 1 (type of ink composition II)>
Heavy calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, sodium bicarbonate 5 wt%, glycerin 20 wt%
<Example 2 (type of ink composition III)>
Heavy calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, citric acid 5 wt%, glycerin 20 wt%
<Example 3 (type of ink composition IV)>
Heavy calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, sodium bicarbonate 2.5 wt%, citric acid 2.5 wt%, glycerin 20 wt%

<Example 4 (type of ink composition III)>
Light calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, citric acid 5 wt%, glycerin 20 wt%
<Example 5 (type of ink composition IV)>
Light calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, citric acid 2.5 wt%, sodium bicarbonate 2.5 wt%, glycerin 20 wt%
<Example 6 (Type of ink composition II)>
Light calcium carbonate 50 wt%, shellac 8.75 wt%, ethanol 16.25 wt%, sodium bicarbonate 5 wt%, glycerin 20 wt%

Next, an experimental example is shown.
<Experimental example 1>
Using scallop shells as shells, this scallop shells were washed with water and crushed to 1 mm to 2 mm, and as shown in FIG. High-speed rotational impact pulverizer (N-COS-1, Co., Ltd.), which is an apparatus for firing at 180 ° C., 250 ° C., 380 ° C., 450 ° C., and 600 ° C. The particle size was adjusted to 5 μm to 20 μm using Nara Machinery Co., Ltd. to obtain heavy calcium carbonate fine particles. And as shown in FIG. 4, the color tone was compared about each fine particle. As a result, the whiteness was 180 ° C to 380 ° C.

<Experimental example 2>
In the same manner as described above, the scallop shell was washed with water, pulverized to 1 mm to 2 mm, and fired at 1000 ° C. in an external heating type rotary furnace to obtain a fired powder. 10 g to 20 g of the calcined powder was put into 1000 ml of distilled water, and carbon dioxide gas was bubbled into the running water while stirring at 300 rpm. The resulting precipitate was collected. Into a beaker prepared in advance, 1000 ml of 5.0% by weight, 10.0% by weight, 15.0% by weight and 20.0% by weight of each sorbitol solution was placed, and the precipitate was put in the beaker and stirred for 5 hours. The suspension was allowed to stand, and the floating part was centrifuged at 8000 rpm for 60 minutes using a centrifuge to obtain a precipitate (light calcium carbonate). Their whiteness and particle size were compared. The results are shown in FIG. As a result, it was found that light calcium carbonate having a particle size of about 0.5 μm to 5 μm can be efficiently obtained with a 10.0 wt% to 15.0 wt% sorbitol solution.
Further, FIG. 6 shows a drawing-substituting electron micrograph showing light calcium carbonate. From this micrograph, it can be seen that it is fine powder calcium carbonate having a constant particle size.

<Experimental example 3>
As shown in FIG. 3, with respect to Examples 1 to 6 described above, together with the comparative example, a printing test was performed to check the reflectance, chromaticity, and fixing condition. Printing was by pad printing or stencil printing. As a comparative example, a composition having a composition of 30% by weight of titanium dioxide, 30% by weight of shellac, 30% by weight of ethanol and 10% by weight of glycerin was used. The measuring device used was a spectroscopic color difference meter (SE-2000), manufactured by Nippon Denshoku Industries Co., Ltd. The XYZ color system is the basis for each color system as a CIE standard colorant. That is, using the chromaticity diagram, the color is represented by three of Yxy. Y is reflectance (%) and corresponds to lightness, and xy represents chromaticity. The results are shown in the figure. From this result, it is said that the white of the comparative example (titanium dioxide) is the strongest, but each example obtained the same reflectivity and chromaticity as compared with the comparative example (titanium dioxide). It can be seen that there was no discoloration and whiteness was improved.

<Experimental example 4>
Using the ink composition according to each example, pad printing was performed on an apple as shown in FIG. Whiteness and transferability were good and printing was easy.
<Experimental example 5>
Using the ink composition according to each example, as shown in FIG. 7, when the screen was printed on a transfer sheet and transferred to an apple, it was easy to print with good whiteness and transferability.

<Experimental example 6>
Moreover, it printed in the inkjet printer using the ink composition containing 25-55 weight% of light calcium carbonate with a particle size of 0.1 micrometer-0.5 micrometer. As a result, good printing results could be obtained.

<Experimental example 7>
Next, Example 1 (ink composition containing 5% by weight of sodium bicarbonate) was printed on an apple as shown in FIG. 7, and then as shown in FIG. 2 (b) 5-15% by weight of citric acid was sprayed on the coating material, and the shape of the coating material was observed and experimented. As a result, as shown in FIG. 2 (c), the coated material foamed and raised to an embossed three-dimensional shape. The height of the emboss was about 1 to 3 mm.
<Experimental Example 8>
Moreover, about Example 2 (ink composition which mix | blended citric acid in the ratio of 5 weight%), as shown in FIG. 7, it prints on an apple, Then, as shown in FIG.2 (b), the coating material 5 to 15% by weight of sodium bicarbonate solution was sprayed to observe the shape of the solution. As a result, as shown in FIG. 2 (c), the coated material foamed and raised to an embossed three-dimensional shape. The height of the emboss was about 1 to 3 mm.
<Experimental Example 9>
Further, Example 3 (ink composition containing 2.5% by weight of citric acid and 2.5% by weight of sodium bicarbonate) was printed on an apple as shown in FIG. 7, and then FIG. 2 (b) As shown in Fig. 4, water was sprayed on the coated material, and the shape was observed and experimented. As a result, as shown in FIG. 2 (c), the coated material foamed and raised to an embossed three-dimensional shape. The height of the emboss was about 1 to 3 mm.

<Experimental example 10>
With the ink composition according to each example, printing experiments of pad printing and screen printing were performed on an edible film mainly composed of agar or gelatin. As a result, all showed good printing forms.

  As described above, since the ink composition provided by the present invention is blended with edible components, it is possible to print pictograms and figures on foods such as fruits and confectionery, and for foods with a colored background. This is effective when edible white ink is required. In addition, since it is possible to create a processed character such as embossing, it is extremely effective when creating printed materials in various forms.

Claims (8)

In white edible ink that is produced in liquid by mixing white edible pigment made of shell powder with solvent containing spreading agent and wetting agent and applied to the object,
An edible ink characterized in that the edible pigment is composed of calcium carbonate powder having a particle size of 20 μm or less, wherein the shell is heat-treated at 160 ° C. to 400 ° C.   The edible ink according to claim 1, wherein the edible pigment is obtained by heat-treating a shell at 180 ° C to 380 ° C.   The edible ink according to claim 2, wherein the edible dye is obtained by heat-treating a shell at 250 ° C to 380 ° C. In a method for producing an edible ink, a white edible pigment composed of shell powder is mixed with a solvent containing a spreading agent and a wetting agent to form a white edible ink that is produced in a liquid state and applied to an object. ,
When producing the edible pigment, the shell is pulverized so that the particle size is 3 mm or less, and the pulverized powder is heat-treated at 160 ° C. to 400 ° C. and then further pulverized to produce particles. A method for producing an edible ink, wherein the powder is calcium carbonate powder having a diameter of 20 μm or less. In a method for producing an edible ink, a white edible pigment composed of shell powder is mixed with a solvent containing a spreading agent and a wetting agent to form a white edible ink that is produced in a liquid state and applied to an object. ,
When producing the edible pigment, the shell is pulverized so that the particle size is 3 mm or less, and the pulverized powder is heat-treated at 160 ° C. to 400 ° C., and then at 800 ° C. to 1200 ° C. Calcination is performed by calcining, and then the calcium oxide is poured into water to form calcium hydroxide. Next, carbon dioxide is blown into the calcium hydroxide solution to precipitate calcium carbonate. A method for producing an edible ink, characterized in that calcium is collected and then the particle size is adjusted to obtain calcium carbonate powder having a particle size of 10 μm or less.   The collected calcium carbonate is put into a sorbitol solution, stirred, allowed to stand for a predetermined time after stirring, the floating part of the solution is taken out, and the taken-out solution is centrifuged to obtain calcium carbonate having a particle size of 10 μm or less. 6. The method for producing an edible ink according to claim 5, wherein the extraction is performed.   7. When producing the edible pigment, the shell is pulverized to a particle size of 3 mm or less, and the pulverized powder is heat-treated at 180 ° C. to 380 ° C. The manufacturing method of the edible ink in any one.   8. The shell according to claim 7, wherein when the edible pigment is produced, the shell is pulverized so as to have a particle size of 3 mm or less, and the pulverized powder is heat-treated at 250 ° C. to 380 ° C. Method for producing edible ink.