JPH1180629A - Aqueous metallic ink composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aqueous metallic ink composition which inhibits the decrease in coloring density of the film and has a high viscosity stability. SOLUTION: An aqueous metallic ink composition is obtained by allowing an ink which comprises at least a brass or aluminum powder pigment, a colorant, water and a water-soluble organic solvent to contain natural polysaccharides and cyclodextrin or derivatives thereof. The natural polysaccharides include microbially produced polysaccharides or derivatives thereof, water-soluble plant polysaccharides or derivatives thereof and water-soluble animal polysaccharides or derivatives thereof Cyclodextrins or derivatives thereof include α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin or derivatives thereof. The ink composition contains from 0.01 to 4 wt.% natural polysaccharides and from 0.1 to 40 wt.% cyclodextrin or derivatives thereof, based on the total weight of the ink composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous metallic ink composition, and more particularly to an aqueous metallic ink composition useful in the fields of writing implement inks, printing inks and paints, and more particularly, to forming a coating film having a high color density. The present invention relates to an aqueous metallic ink composition which can be formed and has excellent viscosity stability.

[0002]

2. Description of the Related Art Conventionally, aqueous metallic ink compositions have been
For example, a water-soluble organic solvent is added to an aqueous solution containing a metal powder pigment and a colorant, if necessary, and a water-soluble resin is added as a viscosity modifier. As an aqueous metallic ink composition, for example, in JP-A-8-199108, an aqueous pigment for ballpoint pens containing at least a metal powder pigment, a resin, a specific compound capable of imparting lubricity, a water-soluble organic solvent, and water An ink is disclosed. In this document, a resin is used as a fixing agent (binder resin) and a viscosity modifier, and the binder resin includes, for example, a water-soluble acrylic resin and an acrylic emulsion, and as the viscosity modifier, xanthan gum, dextran, and the like. Microbial polysaccharides or derivatives thereof, such as water-soluble vegetable polysaccharides or derivatives thereof, water-soluble seaweed-type polysaccharides or derivatives thereof, water-soluble cellulose derivatives, water-soluble synthetic polymers, and the like.Examples include xanthan gum and dextran. It is described as preferred.

[0003]

However, using an aqueous metallic ink composition containing one type of a conventional water-soluble resin, an absorbent surface (such as a conventional copy paper) for absorbing or penetrating water-based ink is used. Coating (writing or printing), the pigment (colorant) penetrates into the paper, and over time (for example, immediately after writing and after a few minutes of writing), paints or paints images. The color density of the film (hereinafter, referred to as “coating film”) decreases. There are also problems such as easy bleeding of the coating film. Further, these ink compositions have low viscosity stability, and the viscosity increases or decreases during storage. Therefore, it is difficult to maintain an appropriate viscosity for a long time. Therefore, it is difficult to control the viscosity of the ink composition according to the application.

[0004] An object of the present invention is to provide an aqueous metallic ink composition which can suppress a decrease in the color density of a coating film and has excellent viscosity stability.

[0005]

Means for Solving the Problems As a result of extensive studies, the present inventors have found that an aqueous metallic ink containing at least a metal powder pigment, a colorant, water and a water-soluble organic solvent contains a natural polysaccharide and a natural polysaccharide. It has been found that the use of an aqueous metallic ink composition containing, cyclodextrin or a derivative thereof can suppress a decrease in the color density of a coating film and can also suppress or prevent a change in viscosity of the ink composition during storage. The invention has been completed. The invention according to claim 1 is characterized in that an aqueous metallic ink containing at least a metal powder pigment, a colorant, water and a water-soluble organic solvent contains a natural polysaccharide and cyclodextrin or a derivative thereof. Aqueous metallic ink composition.

The aqueous metallic ink composition of the present invention comprises:
Since it contains a natural polysaccharide and cyclodextrin or a derivative thereof, and the metal powder pigment is coated with cyclodextrin or a derivative thereof, it is difficult for the coloring agent to penetrate into the absorbing surface (for example, the inside of drawing paper, etc.). A decrease in the color density of the film can be suppressed. This is because cyclodextrin or a derivative thereof is combined with a natural polysaccharide and a metal powder pigment is coated with cyclodextrin or a derivative thereof, so that the effect of cyclodextrin or a derivative thereof is effective on the metal powder pigment. It seems to work. That is, since the hydroxyl group of cyclodextrin or a derivative thereof acts on the metal powder pigment to enhance the hydrophilicity of the metal powder pigment, the affinity (binding property) between the metal powder pigment and the colorant increases, and the colorant becomes a metal. This is presumably because they are trapped or adsorbed by the powdered pigment, and the absorption of the colorant into the absorption surface is suppressed.

Further, the aqueous metallic ink composition of the present invention has high dispersibility (particularly, dispersibility of metal powder pigment) and excellent stability over time of the viscosity of the ink composition. this is,
This is because the metal powder pigment is coated with cyclodextrin or a derivative thereof, so that the elution of metal ions in the ink composition can be suppressed, and the effect of metal ions on natural polysaccharides can be suppressed or prevented. Therefore, since the aqueous metallic ink composition of the present invention contains a natural polysaccharide and cyclodextrin or a derivative thereof,
A decrease in the color density of the coating film can be suppressed, and the viscosity stability of the ink composition is high.

As the metal powder pigment, a brass powder pigment or an aluminum powder pigment can be used. In particular, an aluminum powder pigment can be suitably used as the metal powder pigment.

As the natural polysaccharide, at least one selected from a microbial polysaccharide or a derivative thereof, a water-soluble plant polysaccharide or a derivative thereof, and a water-soluble animal polysaccharide or a derivative thereof can be used. The cyclodextrin or a derivative thereof includes at least one selected from α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, and derivatives thereof. The content of the natural polysaccharide is 0.01 to 4% by weight based on the total amount of the ink composition, and the content of cyclodextrin or a derivative thereof is 0.1 to 40% by weight based on the total amount of the ink composition. It is.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(Natural polysaccharide) The feature of the aqueous metallic ink composition of the present invention is that a natural polysaccharide is used in combination with cyclodextrin or a derivative thereof. for that reason,
The colorant in the metallic ink can be prevented from penetrating into the interior of the absorbing surface, and the viscosity stability of the ink composition can be improved.

As natural polysaccharides, microbial polysaccharides or derivatives thereof, water-soluble plant polysaccharides or derivatives thereof, and water-soluble animal polysaccharides or derivatives thereof can be used.

Examples of the microbial polysaccharide or a derivative thereof include pullulan, xanthan gum, welan gum,
Ramzan gum, succinoglucan, dextran, etc. can be presented.

[0013] The water-soluble plant polysaccharides or derivatives thereof include:
For example, tragansi gum, guar gum, tara gum, b
Castin gum, gati gum, arabinogalactan gum, gum arabic, quisseed gum, pectin, starch, sylum seed gum, carrageenan, alginic acid, agar and the like. The water-soluble animal polysaccharide or a derivative thereof includes, for example, gelatin, casein and the like.

Preferred natural polysaccharides include microbial polysaccharides or derivatives thereof, especially xanthan gum, welan gum, ramzan gum and the like.

The natural polysaccharides can be used alone or in combination of two or more. The amount of the natural polysaccharide used is, for example, 0.01 to 4% by weight, preferably 0.3 to 2% by weight based on the total amount of the ink composition. If the amount of the natural polysaccharide used is too small, the dispersibility of the aluminum powder pigment decreases, and the aluminum powder pigment precipitates. On the other hand, if it is too large, the viscosity of the ink composition becomes high, and the writability and printability deteriorate.

(Cyclodextrin or a derivative thereof) Examples of the cyclodextrin or a derivative thereof include α
-Cyclodextrin, β-cyclodextrin, γ-
Cyclodextrin or their alkyl derivatives,
Maltosyl cyclodextrin, glycosyl cyclodextrin and the like can be mentioned. Cyclodextrin or a derivative thereof can be used alone or in combination of two or more. Alkyl derivatives of cyclodextrin (α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin) include, for example, 2,6-dimethyl-β-cyclodextrin, 2,3,6-trimethyl-
and methyl derivatives of cyclodextrin such as β-cyclodextrin.

Preferred cyclodextrins or derivatives thereof include at least one selected from α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, and derivatives thereof, and more preferably, α-cyclodextrin, A mixture of α-cyclodextrin and β-cyclodextrin and / or γ-cyclodextrin (for example, a mixture of α-cyclodextrin, β-cyclodextrin, and γ-cyclodextrin) can be given. This cyclodextrin mixture (a mixture of α-cyclodextrin and β-cyclodextrin and / or γ-cyclodextrin) may contain α-cyclodextrin, and the content of α-cyclodextrin is as follows. For example, 30% by weight or more (preferably 50% by weight)
Above).

The amount of cyclodextrin or a derivative thereof used is, for example, 0.1 to 40 with respect to the total amount of the ink composition.
%, Preferably 0.3 to 20% by weight. If the amount of cyclodextrin or its derivative is too small,
The fixability of the colorant to the metal powder pigment decreases, and the decrease in the color density of the coating film cannot be suppressed. On the other hand, if the amount is too large, aggregation occurs between the metal powder pigments, which affects the viscosity (increases in viscosity).

(Metal Powder Pigment) As the metal powder pigment, those having a metallic luster can be used, and those having high dispersibility in water are preferable. The metal powder pigment may be a leafing type or a non-leafing type. The metal powder pigment is not particularly limited, and for example, a brass powder pigment or an aluminum powder pigment, particularly an aluminum powder pigment can be suitably used. In the aluminum powder pigment, the effects of the natural polysaccharide and cyclodextrin or a derivative thereof can be significantly exhibited.

As the brass powder pigment, for example, trade name: B
S-605 (manufactured by Toyo Aluminum Co., Ltd.), trade name: BS-
607 (manufactured by Toyo Aluminum Co., Ltd.), trade name: Bronze Powder P-555 (manufactured by Nakajima Metal Foil & Powder Co., Ltd.), trade name: bronze powder P-777 (manufactured by Nakajima Metal Foil & Powder Co., Ltd.), etc. be able to.

Specific examples of the aluminum powder pigment include Alpaste WJP-U75C (trade name, manufactured by Toyo Aluminum Co., Ltd.) and Alpaste WE1200 (trade name).
(Toyo Aluminum Co., Ltd.), Product name: Alpaste WX
M7675 (manufactured by Toyo Aluminum), trade name: Alpaste WXM0630 (manufactured by Toyo Aluminum), trade name: 1110W (manufactured by Showa Aluminum), trade name: 2
172SW (manufactured by Showa Aluminum Co., Ltd.), trade name: AW-
808C (made by Asahi Kasei Corporation), trade name: AW-7000R
(Made by Asahi Kasei Corporation).

The average particle size of the metal powder pigment (brass powder pigment, aluminum powder pigment) is, for example, 5 to 30 μm, preferably 5 to 15 μm. The average particle size is within these ranges,
In particular, metal powder pigments (brass powder pigments, aluminum powder pigments) having a size of 5 to 15 μm are excellent in writability and printability.

The metal powder pigments (brass powder pigments, aluminum powder pigments) can be used alone or in combination of two or more.
The amount of the metal powder pigment (brass powder pigment, aluminum powder pigment) used is, for example, 3 to 30% by weight, preferably 4 to 15% by weight based on the total amount of the ink composition. If the amount of the metal powder pigment is too small, the metallic luster does not appear. On the other hand, if the amount is excessive, the solid content increases, so that the viscosity and the fluidity of the ink composition are affected.

(Colorant) The colorant can be used without any particular limitation as long as it has good dispersibility in aqueous ink.
Therefore, the coloring agent may be a water-soluble coloring agent. Colorants include inorganic pigments and organic pigments. Specifically, examples of the coloring agent include pigments (for example, titanium oxide, zinc white, carbon black, copper phthalocyanine, sulene, azo, quinacridone, anthraquinone, dioxane, indigo, thioindigo, Perinone, perylene, isoindolenone,
Azomethine pigments, fluorescent pigments, ethylenebismelamine, ethylenebismelamine derivatives, etc.), dyes, and colorants obtained by coloring plastic pigments with pigments or dyes. Preferred coloring agents include pigments and dyes.

The coloring agents can be used alone or in combination of two or more. The amount of the colorant used is, for example, 0.05 to 15% by weight, preferably 1 to 1% by weight based on the total amount of the ink composition.
0% by weight. If the amount of the coloring agent is too small, a metallic coating film cannot be obtained. On the other hand, if the amount is excessive, the solid content increases, so that the viscosity and the fluidity of the ink composition are affected.

As the (water) water, conventional water (for example, ion-exchanged water, distilled water, etc.) can be used without any problem. The amount of water used is not particularly limited, and other components (natural polysaccharide, cyclodextrin or a derivative thereof,
It can be selected according to the type and amount of metal powder pigment, colorant, water-soluble organic solvent, etc.), the viscosity of the intended ink composition, and the like. Water usage can vary widely, for example,
It can be selected from a range of about 1 to 80% by weight based on the total amount of the ink composition. The preferred amount of water to be used is about 20 to 70% by weight.

(Water-soluble organic solvent) Examples of the water-soluble organic solvent include glycols (eg, ethylene glycol, diethylene glycol, propylene glycol, etc.), glycol ethers (eg, ethylene glycol monomethyl ether, etc.), and carbitols (eg, Diethylene glycol monomethyl ether), glycerin, trimethylolpropane and the like can be suitably used. The water-soluble organic solvents can be used alone or in combination of two or more. The amount of the water-soluble organic solvent used is, for example,
It is 1 to 40% by weight, preferably 4 to 20% by weight, based on the total amount of the ink composition. If the amount of the water-soluble organic solvent is too small, the ink composition tends to dry, and if it is used for a ballpoint pen or the like, clogging occurs and coating cannot be performed. on the other hand,
If the amount is excessive, the ink is difficult to dry after application.

The aqueous metallic ink composition of the present invention may contain, if necessary, a rust preventive (for example, benzotriazole, tolyltriazole, dicyclohexylammonium nitrate, etc.), a preservative and fungicide (for example, benzoisothiazoline-based preservative and antiseptic). Fungicides, pentachlorophenol-based antiseptic / antifungal agents, cresol-based antiseptic / antifungal agents), dispersants (eg, water-soluble acrylic resin, water-soluble maleic resin, water-soluble styrene-acryl copolymer, water-soluble styrene- Water-soluble resin such as maleic acid copolymer), surfactant, wetting agent, antifoaming agent, leveling agent, anti-agglomeration agent, p
Conventional additives such as an H adjuster and a pseudoplasticity imparting agent may be added.

The viscosity of the aqueous metallic ink composition is not particularly limited as long as it is a conventionally used viscosity, that is, a viscosity that does not cause precipitation of the metal powder pigment and is suitable for writing and printing. In the present invention, the viscosity of the aqueous metallic ink composition is, for example, 3,000 to 20 ° C.
40,000 cps, preferably 3,000 to 15.0
It can be selected from the range of 00 cps. The viscosity is EL
It is measured using a D-type viscometer at a cone of 3 ° R14 cone, a rotation speed of 0.5 rpm, and a temperature of 20 ° C.

(Production method) The aqueous metallic ink composition of the present invention can be prepared by a conventional method using the above components, metal powder pigment, colorant, water, water-soluble organic solvent, natural polysaccharide, cyclodextrin or a derivative thereof. It can be prepared by mixing. For example, water, a water-soluble organic solvent, and a metal (brass powder pigment, aluminum powder pigment) are mixed to prepare a metal powder pigment dispersion, and cyclodextrin or a derivative thereof is added thereto. An aqueous metallic ink composition can be prepared by adding a colorant to this dispersion solution to disperse the same, and further adding a natural polysaccharide and various additives as necessary. Note that the colorant may be used as a colorant dispersion previously dispersed with a dispersant.

The method of dispersion, defoaming, filtration and the like performed in the preparation of the aqueous metallic ink composition can be performed by a conventional method. As described above, by mixing the metal powder pigment dispersion with cyclodextrin or a derivative thereof, the metal powder pigment can be coated with cyclodextrin or a derivative thereof.

The aqueous metallic ink composition of the present invention comprises
A decrease in the color density of the coating film on the absorbing surface can be suppressed. Therefore, when this aqueous metallic ink composition is used, a coating film having a high coloring density can be formed on the absorbing surface and the non-absorbing surface.

This ink composition has a small change in viscosity over a long period of time. Therefore, the viscosity of the ink composition can be controlled to an appropriate viscosity according to the application. Therefore, the viscosity can be controlled to be suitable for the use (writing, printing, etc.), and the appropriate viscosity can be maintained for a long period of time.

Accordingly, the aqueous metallic ink composition of the present invention is useful as a recording ink (for example, a printing ink, a writing ink, an ink jet recording ink, etc.) or an aqueous metallic ink used in a paint-related field.

[0035]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

(Preparation Example 1 of Colored Pigment Dispersion) A colorant (phthalocyanine blue) and a dispersant (styrene-acrylic copolymer) were prepared by mixing phthalocyanine blue / styrene-acrylic copolymer = 5/1 (weight ratio). ), Ion-exchanged water was added thereto, and the mixture was dispersed with a ball mill using sodium hydroxide to prepare a pigment dispersion having an average particle size of 0.08 μm and a solid content concentration of 10% by weight. Hereinafter, this pigment dispersion is referred to as Pigment Base 1. (Preparation Example 2 of Color Pigment Dispersion) A colorant (isoindoline) and a dispersant (styrene-acryl copolymer)
Isoindoline / styrene-acrylic copolymer = 5/1
(Weight ratio) was added to ion-exchanged water and dispersed with a ball mill using sodium hydroxide to prepare a pigment dispersion having an average particle size of 0.15 μm and a solid concentration of 10% by weight. Hereinafter, this pigment dispersion is referred to as Pigment Base 2.

(Examples 1 to 6 and Comparative Examples 1 to 7) In Examples and Comparative Examples, the proportions shown in Table 1 and Table 2 (the amounts of the various components in Tables 1 and 2 were all the same) % By weight) to prepare an ink composition. Specifically, in each of Examples and Comparative Examples, a metal powder pigment (brass powder pigment or aluminum powder pigment) was added to a mixture of ion-exchanged water and a water-soluble organic solvent at room temperature (20 to 25 ° C.). After stirring and dispersing for an hour, the adhesive resin for coloring was added, and the mixture was further stirred for 1 hour to coat the metallic powder pigment by adsorbing the adhesive resin for coloring. To this dispersion, add a pigment base and stir at room temperature (20-25 ° C) for 1 hour,
Coloring was performed by adsorbing a colorant onto the metal powder pigment. The natural polysaccharide and various additives are added to the colored metal powder pigment dispersion, and further added at room temperature (20 to 25 ° C.).
After stirring for an hour, an aqueous metallic ink composition was obtained.

As the raw materials, the following metal powder pigments, natural polysaccharides, adhesive resins for coloring such as cyclodextrin or derivatives thereof, and antiseptic / antifungal agents were used. (Metal powder pigment)-Aluminum powder pigment 1 Trade name: ALPASTE WXM0630, manufactured by Toyo Aluminum Co., Ltd., leafing type, average particle size: about 8μ
m ・ Aluminum powder pigment 2 Product name: Alpaste WXM7675, manufactured by Toyo Aluminum Co., Ltd., non-leafing type, average particle size: about 15 μm ・ Brass powder pigment 1 Product name: BS-605, manufactured by Toyo Aluminum Co., Ltd. -Brass powder pigment 2 Product name: BS-607, manufactured by Toyo Aluminum Co., Ltd. (natural polysaccharide)-Xanthan gum Product name: KELZAN, manufactured by Sansei Co., Ltd.-Welan gum Product name: K1A96, Sansei Co., Ltd. -Ramzan gum Product name: K7C233, manufactured by Sanseki Co., Ltd. (adhesive resin for coloring)-Cyclodextrin 1 Product name: Dexipearl α-100, manufactured by Saltwater Port Sugar Co., Ltd., α-cyclodextrin (100% -Cyclodextrin 2 Trade name: Dexipearl K-50, manufactured by Saltwater Port Sugar Co., Ltd., mixed with α-, β-, γ-cyclodextrin -Carboxymethylcellulose (referred to as "CMC") Trade name: Cellogen PR, manufactured by Daiichi Kogyo Seiyaku Co., Ltd., number average molecular weight: 47,000-54,000-Polyvinyl alcohol Trade names: PVA-117, Kuraray Co., Ltd. ) Co., Ltd., number average molecular weight: 1800 ・ Sodium polyacrylate Trade name: Julimer AC-20N, manufactured by Nippon Pure Chemical Co., Ltd. ・ Styrene acrylic emulsion (referred to as “St-A emulsion”) Trade name: Joncryl 1535 Acrylic vinyl acetate emulsion (referred to as "A-AcV emulsion") Trade name: Movinyl SK-3000, manufactured by Hoechst Gosei Co., Ltd. Isothiazolin-3-one Trade name: Proxel GXL, manufactured by Hoechst Gosei Co., Ltd. (Rust prevention Agent) ・ Benzotriazole

[0039]

[Table 1]

[0040]

[Table 2]

(Evaluation of Ink Composition) (Viscosity Stability Test) Each of the metallic ink compositions obtained in Examples 1 to 6 and Comparative Examples 1 to 7 was placed in a beaker and left at 50 ° C. for 30 days. The change in viscosity of the ink composition (change in viscosity before and after standing) was examined, and the viscosity stability of the ink composition was evaluated according to the following criteria. The results are shown in Tables 1 and 2. The viscosity was measured by an ELD viscometer using a cone of 3 ° R14 cone and a rotation speed of 0.5 r.
pm, temperature: 20 ° C. ：: Little change in viscosity before and after standing Δ: Little change in viscosity (thickening or thinning) before and after leaving ×: Significant change in viscosity (thickening or thinning) before and after standing

(Coloring Test) Each of the metallic ink compositions obtained in Examples 1 to 6 and Comparative Examples 1 to 7 was filled in an ink container, and bubbles in the ink were removed by centrifugation. A test sample of a ballpoint pen was prepared. Using this test sample, the color development and adhesion of the handwriting were evaluated by the following color development test and adhesion test, and the results are shown in Table 1 or Table 2. In addition, a nickel-white ball-point pen tip (ball material: cemented carbide)
Was connected to one end of a ball-point pen ink container made of a hollow cylinder made of polypropylene.

The test sample was used to write on black paper (absorbing surface), and the coloring of the handwriting was visually evaluated according to the following criteria. ：: Handwriting having good metallic luster together with the color of the coloring pigment. X: Handwriting without the color of the coloring pigment and only the color of the metal powder pigment.

In Examples 1 to 6, the ink composition hardly changed in viscosity before and after standing at 50 ° C. for 30 days, and the viscosity stability was excellent.

Further, in Examples 1 and 4, blue metallic handwriting having a high color density was obtained.
In Nos. 5 and 6, a metallic metallic handwriting was obtained at a high coloring density.

On the other hand, in Comparative Examples 1 and 6, blue metallic handwriting was obtained, but the viscosity stability of the ink composition was low. In Comparative Examples 2 and 7, the viscosity stability of the ink composition was good, but no golden metallic handwriting was obtained. In Comparative Examples 3 to 5, metallic handwriting was not obtained, and the viscosity stability of the ink composition was low.

Therefore, the aqueous metallic ink compositions obtained in Examples 1 to 6 have high viscosity stability, and using this ink composition, a metallic handwriting having a high color density can be obtained.

[0048]

The aqueous metallic ink composition of the present invention contains a metal powder pigment, a colorant, water, a water-soluble organic solvent, a natural polysaccharide, and cyclodextrin or a derivative thereof, so that the viscosity is stable over time. Is excellent,
A metallic coating film having a high coloring density can be formed.

Claims (5)

[Claims] An aqueous metallic ink containing at least a metal powder pigment, a colorant, water and a water-soluble organic solvent, wherein the aqueous metallic ink contains a natural polysaccharide and cyclodextrin or a derivative thereof. Metallic ink composition. 2. The aqueous metallic ink composition according to claim 1, wherein the metal powder pigment is a brass powder pigment or an aluminum powder pigment. 3. The natural polysaccharide is at least one selected from a microbial polysaccharide or a derivative thereof, a water-soluble plant polysaccharide or a derivative thereof, and a water-soluble animal polysaccharide or a derivative thereof. Or the aqueous metallic ink composition according to 2. 4. The cyclodextrin or a derivative thereof,
α-cyclodextrin, β-cyclodextrin, γ
The aqueous metallic ink composition according to claim 1, which is at least one selected from cyclodextrin and derivatives thereof. 5. The ink composition according to claim 1, comprising 0.01 to 4% by weight of a natural polysaccharide and 0.1 to 40% by weight of cyclodextrin or a derivative thereof based on the total amount of the ink composition.
The aqueous metallic ink composition according to any one of the above items.