JP2015147848A - Inkjet ink set for printing and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel inkjet ink set for printing.SOLUTION: There is provided an inkjet ink set for printing in which yellow ink contains C.I. Acid Yellow 49, magenta ink contains C.I. Acid Red 249, cyan ink contains C.I. Direct Blue 87 and black ink contains at least one of C.I. Acid Black 52:1, C.I. Acid Black 172 and C.I. Acid Black 194.

Description

  The present invention relates to an inkjet ink set for textile printing and a method for producing the same.

  Patent Document 1 describes an inkjet ink set for textile printing. Patent Document 1 describes that the inkjet ink set for textile printing has a wide color gamut and is excellent in fastness and storage stability.

JP 2007-238741 A (published September 20, 2007)

  However, there are colors that cannot be reproduced even with the inkjet ink set for textile printing of Patent Document 1, and a new inkjet ink set for textile printing is necessary to reproduce the color.

  The present invention has been made in view of such problems, and an object thereof is to provide a new inkjet ink set for textile printing.

  In order to solve the above problems, a textile printing inkjet ink set according to the present invention is a textile printing inkjet ink set comprising at least a yellow ink, a magenta ink, a cyan ink, and a black ink, each containing an acid dye. Yellow ink is a C.I. I. Acid Yellow 49, and the magenta ink contains C.I. I. Acid Red 249, and the cyan ink contains C.I. I. Direct Blue 87 and the black ink contains C.I. I. Acid Black 52: 1, C.I. I. Acid Black 172 and C.I. I. It contains at least one of Acid Black 194.

  Thereby, for example, a color that cannot be reproduced by the inkjet ink set for textile printing disclosed in Patent Document 1 can be reproduced.

  The inkjet ink set for textile printing according to the present invention has orange ink and blue ink as special color inks, and the orange ink is C.I. I. Acid Orange 95 and C.I. I. Acid Orange 33 is contained, and the blue ink contains C.I. I. Acid Blue 90: 1 may be included. Thereby, the color gamut that can be reproduced is further expanded.

  In the inkjet ink set for textile printing according to the present invention, the amount of chlorine ions contained in the yellow ink, the magenta ink, the cyan ink, and the black ink is 300 ppm or less and the amount of sulfate ions is 300 ppm or less, respectively. It is more preferable. Thereby, since the ink storage stability is improved, precipitation of the salt of each ion can be suppressed. As a result, the ejection stability from the head is improved.

  In the inkjet ink set for textile printing according to the present invention, the amount of chlorine ions contained in each of the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink is 300 ppm or less, and sulfuric acid is used. More preferably, the amount of ions is 300 ppm or less. Thereby, since the ink storage stability is improved, precipitation of the salt of each ion can be suppressed. As a result, the ejection stability from the head is improved.

  In the inkjet ink set for textile printing according to the present invention, each of the yellow ink, the magenta ink, the cyan ink, and the black ink has a calcium content of 200 ppm or less, an iron content of 20 ppm or less, and a magnesium content. More preferably, each is 30 ppm or less. As a result, it is possible to suppress variations in color tone and prevent a decrease in density after image formation.

  In the inkjet ink set for textile printing according to the present invention, the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink each have a calcium content of 200 ppm or less and an iron content of 20 ppm each. More preferably, the magnesium content is 30 ppm or less. As a result, it is possible to suppress variations in color tone and prevent a decrease in density after image formation.

  In the method for producing an inkjet ink set for textile printing according to the present invention, the yellow ink, the magenta ink, the cyan ink, and the black ink are subjected to a purification treatment so that the chlorine ion content is 300 ppm or less and the sulfate ion content is Each is characterized by being 300 ppm or less. Thereby, for example, it is possible to reproduce a color that cannot be reproduced by the textile ink jet ink set disclosed in Patent Document 1, and to produce a textile ink jet ink set that is excellent in ink storage stability.

  In the method for producing an inkjet ink set for textile printing according to the present invention, the yellow ink, the magenta ink, the cyan ink, and the black ink are subjected to a purification treatment so that the calcium content is 200 ppm or less and the iron content is 20 ppm. Hereinafter, it is more preferable that the magnesium content is 30 ppm or less. Thereby, the inkjet ink set for textile printing which can suppress the fluctuation | variation of a color tone and can prevent the density fall after image formation can be manufactured.

  In the manufacturing method of the inkjet ink set for textile printing according to the present invention, the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink are subjected to a purification treatment, and the chlorine ion content is set respectively. More preferably, it is 300 ppm or less and the sulfate ion content is 300 ppm or less. Thereby, for example, it is possible to reproduce a color that cannot be reproduced by the textile ink jet ink set disclosed in Patent Document 1, and to produce a textile ink jet ink set that is excellent in ink storage stability.

  In the method for manufacturing an inkjet ink set for textile printing according to the present invention, the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink are subjected to a purification treatment, and each calcium content is 200 ppm. A method for producing an inkjet ink set for textile printing, wherein the iron content is 20 ppm or less and the magnesium content is 30 ppm or less, respectively. Thereby, the inkjet ink set for textile printing which can suppress the fluctuation | variation of a color tone and can prevent the density fall after image formation can be manufactured.

  According to the present invention, there is an effect that a new inkjet ink set for textile printing can be provided. Thereby, for example, a color that cannot be reproduced by the inkjet ink set for textile printing disclosed in Patent Document 1 can be reproduced.

It is a figure which shows the evaluation result of the ink set in an Example. It is a figure which shows the evaluation result of the ink set in an Example.

<Inkjet ink set for textile printing>
The inkjet ink for printing (hereinafter also simply referred to as “ink”) constituting the inkjet ink set for textile printing (hereinafter also simply referred to as “ink set”) according to the present invention is a specific acidic dye as a coloring material. Is used. That is, the inkjet ink set for textile printing according to the present invention is an inkjet ink set for textile printing composed of at least a yellow ink, a magenta ink, a cyan ink, and a black ink each containing an acidic dye. C. I. Acid Yellow 49, and the magenta ink contains C.I. I. Acid Red 249, and the cyan ink contains C.I. I. Direct Blue 87 and the black ink contains C.I. I. Acid Black 52: 1, C.I. I. Acid Black 172 and C.I. I. Contains at least one of Acid Black 194. In addition, water, organic solvents, various additives, and the like may be included.

[Color material]
Each color ink constituting the ink set according to the present invention realizes an excellent color reproduction range, and from the viewpoint of image fastness and ejection stability, a specific acidic dye, that is, a yellow ink has C.I. I. Acid Yellow 49, C.I. I. Acid Red 249, C.I. I. Direct Blue 87, C.I. I. Acid Black 52: 1, C.I. I. Acid Black 172 and C.I. I. Contains at least one of Acid Black 194. In particular, since the ink according to the present invention stably forms a mixed color portion on a fabric with two or more colors of ink, special compatibility is required between the acid dyes to be used. It is necessary to have a dye composition.

  The color material constituting each color ink included in the ink set according to the present invention may be composed of only the acid dyes defined in the present invention. The content of the acidic dye as defined in the present invention is 70% by mass or more in all the color materials in each color ink, as long as the objective effects of the present invention are not impaired. Preferably, it is more preferably 85% or more, and it is particularly preferable that all of the coloring material is composed of the acidic dye defined in the present invention.

  In addition, in the ink set according to the present invention, in particular, from the viewpoint of further improving the color reproducibility in the special color region, together with the yellow ink, magenta ink, cyan ink and black ink according to the present invention, C.I. I. Acid Orange 95 and C.I. I. Orange ink containing at least one of Acid Orange 33, C.I. I. It is preferable to use a blue ink containing Acid Blue 90: 1.

  In each color ink constituting the ink set according to the present invention, the content of the color material in the ink is not less than 0.1% by mass and not more than 20% by mass in consideration of obtaining sufficient image density and considering ink storage stability. It is preferable that it is 0.2 mass% or more and 13 mass% or less.

[Ink and coloring material purification]
In each color ink constituting the ink set according to the present invention, a commercially available acid dye may be used as it is. Further, from the viewpoint of further improving the ink storage stability during long-term storage, it is preferable to subject the acid dye or the ink containing the acid dye to a purification treatment. The purification method applicable to the ink set according to the present invention is not particularly limited, and for example, a known recrystallization method, washing, or the like can be used. When the acid dye itself is subjected to a purification treatment, it is preferable to select an organic solvent according to the type of the acid dye and perform the purification treatment using it.

  Acid dyes are less soluble than reactive dyes. Accordingly, when the acid dye has low purity and contains impurities, problems such as precipitation are likely to occur.

  In the purification treatment, the acid dye before preparation of the ink may be subjected to purification treatment, or the ink containing all components may be prepared and then subjected to the purification treatment.

  In the ink set according to the present invention, an ink set composed of yellow ink, magenta ink, cyan ink and black ink, or composed of yellow ink, magenta ink, cyan ink, black ink, orange ink and blue ink. In the ink set, the purification treatment may be performed so that at least one ink, preferably, the amount of chlorine ions contained in all inks is 300 ppm or less and the amount of sulfate ions is 300 ppm or less, respectively. preferable. Thereby, since the ink storage stability is improved, precipitation of a sodium salt or the like of each ion can be suppressed. As a result, the ejection stability from the head is improved. In particular, clogging of the nozzles of the inkjet recording head can be prevented by preventing salt precipitation at low temperatures. More preferably, the amount of chlorine ions is 5 ppm or more and 100 ppm or less, and the amount of sulfate ions is 20 ppm or more and 100 ppm or less. Thus, precipitation of sodium salt during low temperature storage is further suppressed.

  In the ink set according to the present invention, the ink set includes yellow ink, magenta ink, cyan ink, and black ink, or includes yellow ink, magenta ink, cyan ink, black ink, orange ink, and blue ink. It is preferable to carry out a purification treatment so that the calcium content in each ink is 200 ppm or less, the iron content is 20 ppm or less, and the magnesium content is 30 ppm or less.

  As a result, it is possible to suppress variations in color tone and prevent a decrease in density after image formation. More preferably, the calcium content is 0.01 ppm or more and 100 ppm or less, the iron content is 0.1 ppm or more and 10 ppm or less, and the magnesium content is 0.01 ppm or more and 10 ppm or less. By setting the content of the metal salt within this range, precipitation during long-term storage can be prevented.

  As a method for quantifying each ion and each polyvalent metal salt in the ink, it can be determined using a known quantitative analysis means, and for example, an atomic absorption method or the like can be used.

  The following method is mentioned as a concrete purification method of the ink which comprises the ink set which concerns on this invention, or the acidic dye used for it. That is, for example, an acidic dye solution dissolved in ink or a suitable organic solvent is mixed with an adsorbent or an ion exchange resin, stirred, and then filtered. Examples of the adsorbent include activated carbon, zeolite, and diatomaceous earth. Examples of the ion exchange resin include a cation resin and an anion exchange resin. Further, it may be passed through a column filled with an adsorbent or an ion exchange resin. Further, desalting and purification may be performed by an ultrafiltration device. By performing the methods listed here alone or in combination, the content can be adjusted to a desired impurity content or less. However, the present invention is not limited to the purification method exemplified here.

[Organic solvent]
The organic solvent that can be used in the ink constituting the ink set according to the present invention is preferably a water-soluble organic solvent. For example, polyhydric alcohols (for example, ethylene glycol, glycerin, 2-ethyl-2- ( Hydroxymethyl) -1,3-propanediol, tetraethylene glycol, triethylene glycol, tripropylene glycol, 1,2,4-butanetriol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, 1,6-hexanediol 1,2-hexanediol, 1,5-pentanediol, 1,2-pentanediol, 2,2-dimethyl-1,3-propanediol, 2-methyl-2,4-pentanediol, 3-methyl- 1,5-pentanediol, 3-methyl- , 3-butanediol, 2-methyl-1,3-propanediol, etc.), amines (eg, ethanolamine, 2- (dimethylamino) ethanol, etc.), monohydric alcohols (eg, methanol, ethanol, butanol, etc.) Alkyl ethers of polyhydric alcohols (eg, diethylene glycol monomethyl ether, diethylene glycol monobutyl ether, triethylene glycol monomethyl ether, triethylene glycol monobutyl ether, ethylene glycol monomethyl ether, ethylene glycol monobutyl ether, propylene glycol monomethyl ether, propylene glycol monobutyl ether , Dipropylene glycol monomethyl ether, etc.), 2,2'-thiodiethanol, amides (for example, N, N- Methylformamide, etc.), heterocyclic compounds (2-pyrrolidone), acetonitrile and the like.

  The amount of the water-soluble organic solvent is preferably 10% by mass or more and 60% by mass or less with respect to the total ink mass.

[Surfactant]
The ink constituting the ink set according to the present invention can contain various surfactants from the viewpoint of enhancing storage stability, emission stability, emission accuracy, and the like. As the surfactant, any of cationic, anionic, amphoteric and nonionic surfactants can be used.

  Examples of the cationic surfactant include aliphatic amine salts, aliphatic quaternary ammonium salts, benzalkonium salts, benzethonium chloride, pyridinium salts, imidazolinium salts, and the like.

  Examples of the anionic surfactant include fatty acid soap, N-acyl-N-methylglycine salt, N-acyl-N-methyl-β-alanine salt, N-acyl glutamate, alkyl ether carboxylate, acyl Peptide, alkyl sulfonate, alkyl benzene sulfonate, alkyl naphthalene sulfonate, dialkyl sulfosuccinate, alkyl sulfoacetate, α-olefin sulfonate, N-acylmethyl taurine, sulfated oil, higher alcohol Sulfate, secondary higher alcohol sulfate, alkyl ether sulfate, secondary higher alcohol ethoxy sulfate, polyoxyethylene alkyl phenyl ether sulfate, monoglyculate, fatty acid alkylolamide sulfate, alkyl ether phosphorus acid Examples thereof include ester salts and alkyl phosphate ester salts.

  Examples of amphoteric surfactants include carboxybetaine type, sulfobetaine type, aminocarboxylate, imidazolinium betaine and the like.

  Nonionic surfactants include, for example, polyoxyethylene alkyl ether, polyoxyethylene secondary alcohol ether, polyoxyethylene alkyl phenyl ether (eg, Emulgen 911), polyoxyethylene sterol ether, polyoxyethylene lanolin derivative, polyoxyethylene Oxyethylene polyoxypropylene alkyl ether (for example, Newpol PE-62), polyoxyethylene glycerin fatty acid ester, polyoxyethylene castor oil, hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyethylene glycol fatty acid Ester, fatty acid monoglyceride, polyglycerin fatty acid ester, sorbitan fatty acid ester, propylene glycol fat Esters, sucrose fatty acid esters, fatty acid alkanolamides, polyoxyethylene fatty acid amides, polyoxyethylene alkyl amines, alkyl amine oxides, acetylene glycol, acetylene alcohol, and the like.

  When each of these surfactants is used, it can be used alone or in combination of two or more, and added in the range of 0.001% by mass or more and 1.0% by mass or less with respect to the total amount of the ink. Therefore, the surface tension of the ink can be arbitrarily adjusted, which is preferable.

〔Preservative〕
In the ink according to the present invention, an antiseptic and an antifungal agent can be added to the ink in order to maintain long-term storage stability. Examples of the antiseptic and antifungal agent include aromatic halogen compounds (for example, Preventol CMK; manufactured by Bayer), methylene dithiocyanate, halogen-containing nitrogen-sulfur compounds, 1,2-benzisothiazolin-3-one (for example, PROXEL GXL). ; Manufactured by Abyssia).

[Various additives]
The ink constituting the ink set according to the present invention may contain other conventionally known additives. For example, fluorescent brighteners, antifoaming agents, lubricants, thickeners, antistatic agents, matting agents, acid bases, pH adjusters such as buffer solutions, antioxidants, specific resistance adjusters, rust preventives, inorganic pigments A reduction inhibitor, and the like.

<Fabric>
In the inkjet textile printing method using the ink set according to the present invention, the material constituting the fabric to be used is preferably a fabric containing polyamide fiber, and among them, nylon, silk, and wool are preferable. The polyamide fiber can be used in any form such as a woven fabric, a knitted fabric, and a non-woven fabric.

  The fabric is preferably made of 100% polyamide fiber, but if the blending rate is 30% or more, preferably 50% or more, the polyamide fiber and other materials such as rayon, cotton, acetate, polyurethane, Even a blended woven fabric or a blended nonwoven fabric with acrylic or the like can be used as a textile for printing in the present invention.

  There are suitable ranges for the physical properties of the polyamide fiber and the yarn composed of the polyamide fiber constituting the fabric. For example, in the case of nylon, the average thickness of the nylon fiber is 1 to 10 d (denier), more preferably 2 A nylon yarn having an average thickness of 20 to 100 d, more preferably 25 to 80 d, and still more preferably 30 to 70 d is preferably used. In the case of silk, as a characteristic of the fiber itself, the average thickness of the silk fiber is controlled to 2.5 to 3.5d, more preferably 2.7 to 3.3d, and the silk yarn composed of the silk fiber. The average thickness is controlled to 14 to 147d, more preferably 14 to 105d, and fabrics made by a known method are preferably used.

〔Preprocessing〕
The textile for textiles applied to the ink-jet textile printing method using the ink set concerning the present invention can use a publicly known pretreatment method together as needed. For example, those containing 0.01 to 20% by mass of urea, water-soluble metal salt, water-soluble polymer and the like are more preferable. Furthermore, a water repellent, a surfactant and the like can be added.

  Examples of the water-soluble polymer include starch substances such as corn and wheat, cellulosic substances such as carboxymethylcellulose, methylcellulose, and hydroxyethylcellulose, polysaccharides such as sodium alginate, arabic gum, locust bean gum, tant gum, guar gum, tamarind seeds, Known natural water-soluble polymers such as protein substances such as gelatin and casein, tannin substances, and lignin substances can be used.

  Examples of the synthetic polymer include known polyvinyl alcohol compounds, polyethylene oxide compounds, acrylic acid-based water-soluble polymers, and maleic anhydride-based water-soluble polymers. Of these, polysaccharide polymers and cellulose polymers are preferred.

Examples of the water-soluble metal salt include compounds that form typical ionic crystals and have a pH of 4 to 10, such as alkali metal and alkaline earth metal halides. Representative examples of the compound include, for example, Na, K salts such as NaCl, Na ₂ SO ₄ , KCl, and CH ₃ COONa for alkali metals, and CaCl ₂ , MgCl for alkaline earth metals. _{2 and the} like salts of Ca and Mg. Of these, Na, K, and Ca salts are preferred.

  Examples of the water repellent include paraffin-based, fluorine-based compounds, pyridinium salts, N-methylol alkylamides, alkylethylene urea, oxalin derivatives, silicone-based compounds, triazine-based compounds, zirconium-based compounds, or mixtures thereof. However, it is not particularly limited. Among these water repellents, paraffin-based and fluorine-based water repellents are particularly preferable in terms of prevention of bleeding and concentration. The water repellent is preferably added to the fabric in an amount of 0.05 to 40% by mass, more preferably in the range of 0.5 to 10% by mass. This is because if the amount is 0.05% by mass or more, excessive penetration of the ink can be prevented, and even if the amount exceeds 40% by mass, there is no significant change in performance.

  As the surfactant, an anionic, nonionic or amphoteric surfactant can be used.

  Examples of anionic surfactants include sulfonic acid type, carboxylic acid type, sulfuric acid ester type, and phosphoric acid ester type, and sulfonic acid type includes alkyl sulfonate type and alkyl allyl sulfonate ester type sulfonate type surfactants. As the carboxylic acid type, soap, fat protein condensate, etc., and as the sulfate type, higher alcohol sulfate, higher alcohol EO adduct sulfate, olefin sulfate, fatty acid sulfate, etc., phosphate ester Examples of the mold include higher alcohol phosphate esters, higher alcohol EO adduct phosphate esters, and the like.

  Nonionic surfactants include ether types such as polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyethylene polyoxypropylene ether, acetylene glycol, polyoxyethylene alkyl ester, sorbitan fatty acid ester, etc. An ester type, an amino ether type such as polyoxyethylene alkylamine, and an ether ester type such as polyoxyethylene sorbitan fatty acid ester can be used. In particular, it is preferable to use a nonionic surfactant of HLB 12.5 or more, preferably 14 or more.

  A betaine type etc. can be used as an amphoteric surfactant.

  The surfactant is preferably added to the fabric in an amount of 0.01 to 30% by mass. Furthermore, it is preferable to add additives such as a reducing agent, an antioxidant, a leveling agent, a deep dyeing agent, a carrier, a reducing agent, and an oxidizing agent depending on the characteristics of the dye used.

  A method for incorporating the compound used for the pretreatment into the fabric is not particularly limited, and examples thereof include a dipping method, a pad method, a coating method, a spray method, and an ink jet method.

<Inkjet printing method>
In the ink jet textile printing method for printing on a fabric using the ink set according to the present invention, it is desirable that after printing the ink, the printed fabric is wound up, colored by heating, washed and dried. In ink-jet textile printing, ink cannot be satisfactorily dyed simply by printing on a fabric and leaving it as it is. In addition, when printing on a long fabric for a long time, it is preferable to take up the fabric coming out of the ink jet apparatus. This is because the place where the printed fabric is placed can be saved. In addition, the printed fabric placed on the floor or the like can prevent problems such as unexpected stains. When winding, a medium such as paper, cloth, vinyl or the like on which printed ink is difficult to move may be sandwiched between the cloths.

  The fabric to which the ink constituting the ink set according to the present invention is applied from the inkjet recording head is preferably subjected to post-treatment to promote the fixing of the acid dye to the fiber. In addition, it is preferable to sufficiently remove the colorant, other ink components, and the pretreatment agent that have not been fixed after the posttreatment.

  Post-treatment can be divided into several steps. First, it is preferable that after the ink constituting the ink set according to the present invention is attached to a cloth, the cloth is left at room temperature (for example, 20 ° C.) to 150 ° C. for 0.5 to 30 minutes to predry the ink. . This preliminary drying can improve the printing density and effectively prevent bleeding. The preliminary drying includes that the ink penetrates into the fabric.

  According to the ink jet textile printing method according to the present invention, the heat drying may be continuously performed as the preliminary drying. The cloth is rolled and supplied to an ink jet printing machine for printing, and then dried before winding the printing cloth. The dryer may be directly connected to the printing machine or may be separated. Drying in a dryer is preferably performed at 150 ° C. or lower for 0.5 to 30 minutes. Moreover, as a preferable drying method, an air convection method, a heating roll direct attachment method, an irradiation method, etc. are mentioned.

  According to the ink jet textile printing method of the present invention, it is preferable that the fixing step in the post-processing step is changed in conditions, particularly in the time, depending on the type of fabric. For example, when the fabric is wool, the time is preferably 20 to 120 minutes, more preferably about 30 to 90 minutes. When the fabric is silk, the time is preferably 5 to 40 minutes, more preferably about 15 to 30 minutes. Furthermore, when the fabric is nylon, it is preferably about 5 to 90 minutes, more preferably about 10 to 60 minutes.

  Among inks recorded by ink jet recording, most of the dyes adhere to the fabric, but some dyes do not adhere to the fibers. It is preferable to wash away the dye that has not fixed. A conventionally known cleaning method can be employed to remove the dye that has not adhered. For example, it is preferable to use water of several tens of degrees Celsius to 100 degrees Celsius or an anionic or nonionic soaping agent. By sufficiently removing the color material that has not adhered, better results in terms of washing fastness, water fastness and sweat fastness can be obtained.

  It is preferable to dry after washing. After the washed fabric is squeezed or dehydrated, it is dried or dried using a dryer, heat roll, iron or the like.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in the embodiments are also included. It is included in the technical scope of the present invention.

[Ink set according to Example 1 and Comparative Example 1]
First, an ink set according to Example 1 (hereinafter also referred to as “ink set I”) and an ink set according to comparative example 1 (hereinafter also referred to as “ink set II”) will be described. The “%” shown below is “% by weight”.

  Various acid dyes used for the preparation of the ink were purified.

  Each color ink was prepared according to the composition shown in Tables 1 and 2 below. Each material was added while stirring. The order of charging was performed in order from the top of Tables 1 and 2.

  Ink set II was prepared in the same manner except that the following acid dyes were used as yellow and blue acid dyes of ink set I.

Ink set I: Yellow Acid Yellow 49, Blue Acid Blue 90: 1
Ink set II: Yellow Acid Yellow 79, Blue Acid Blue 112

(Image formation)
(Pre-treatment cloth creation)
A pretreatment agent was applied to 100% silk fabric, treated with mangle, and dried at room temperature for 2 hours.

  The composition and blending ratio of the pretreatment agent are as follows.

Sodium carboxymethylcellulose 1.5%
Sodium polyacrylate 1.0%
Ammonium tartrate 3.0%
Urea 5.0%
89.5% water
Total 100.0%.

(Printing)
Tx-2 manufactured by Mimaki Engineering Co., Ltd. was used as a printing apparatus, and a solid image was printed at 720 × 720 dpi for each ink sealed in the ink pack. The more detailed printing conditions are as follows.

Device: Tx-2
Resolution: 720x720ND (ink limit off)
Image: gradation pattern (10% to 100%)
Media: The above pre-treated cloth Post-treatment: 104.4 ° C x 12 min (box steamed)
Colorimeter: X-Rite 1 (D65 / 10).

(Color development / washing)
The printed fabric was dried and treated in steam at 104.4 ° C. for 12 minutes, then rinsed with cold water for 5 minutes and then with warm water at 40-50 ° C. for 5 minutes. Next, using a soaping solution, it processed at 40-50 degreeC for 3 minutes, and then processed at 40 degreeC-50 degreeC warm water for 2 minutes, and cold water for 2 minutes. Then, it was dried.

(Evaluation)
About each image, colorimetry was performed with the colorimeter (X-Rite (D65 / 10)), and reflection density and hue were evaluated. The reflection density was compared with the measured value. For hue, gamut reproducibility comparison was performed. The light resistance was evaluated according to ISO105-B02 light resistance and ISO105-E04 sweat resistance. The evaluation criteria are as follows. The results are shown in Tables 3 to 6 and FIGS.
◎ Grade 4 or higher ○ Grade 3 or higher, less than Grade 4

  As shown in FIG. 1, the reflection density of Yellow was the same for ink set I and ink set II. The reflection density of Blue was improved by setting AcidBlue 90: 1.

  As shown in FIG. 2, with respect to color reproducibility, the use of Acid Yellow 49 and Acid Blue 90: 1 (Example 1) widened the color reproducibility. A portion surrounded by a dotted line in FIG. 2 indicates that the color reproducibility is widened.

  The present invention can be used for textile printing.

Claims (10)

  In an inkjet ink set for textile printing comprising at least a yellow ink, a magenta ink, a cyan ink and a black ink, each containing an acid dye, the yellow ink is C.I. I. Acid Yellow 49, and the magenta ink contains C.I. I. Acid Red 249, and the cyan ink contains C.I. I. Direct Blue 87 and the black ink contains C.I. I. Acid Black 52: 1, C.I. I. Acid Black 172 and C.I. I. An inkjet ink set for textile printing, comprising at least one of Acid Black 194.   The special color ink includes orange ink and blue ink, and the orange ink is C.I. I. Acid Orange 95 and C.I. I. Acid Orange 33 is contained, and the blue ink contains C.I. I. The inkjet ink set for textile printing according to claim 1, comprising Acid Blue 90: 1.   The amount of chlorine ions contained in each of the yellow ink, the magenta ink, the cyan ink, and the black ink is 300 ppm or less, and each of the sulfate ions is 300 ppm or less. Inkjet ink set for textile printing.   The amount of chlorine ions contained in each of the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink is 300 ppm or less, and each of the sulfate ions is 300 ppm or less. The inkjet ink set for textile printing according to claim 2.   The yellow ink, the magenta ink, the cyan ink, and the black ink each have a calcium content of 200 ppm or less, an iron content of 20 ppm or less, and a magnesium content of 30 ppm or less, respectively. Item 4. The inkjet ink set for textile printing according to Item 3.   The yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink each have a calcium content of 200 ppm or less, an iron content of 20 ppm or less, and a magnesium content of 30 ppm or less, respectively. The inkjet ink set for textile printing according to claim 4, wherein:   A method for producing a printing ink-jet ink set according to claim 1, wherein the yellow ink, the magenta ink, the cyan ink and the black ink are subjected to a purification treatment to produce chloride ions. A method for producing an inkjet ink set for textile printing, characterized in that each content is 300 ppm or less and each sulfate ion content is 300 ppm or less.   A method for producing an inkjet ink set for textile printing according to claim 1, wherein the yellow ink, the magenta ink, the cyan ink and the black ink are subjected to a purification treatment to contain calcium. A method for producing an inkjet ink set for textile printing, characterized in that the amount is 200 ppm or less, the iron content is 20 ppm or less, and the magnesium content is 30 ppm or less, respectively.   A manufacturing method of a printing inkjet ink set according to claim 2, wherein the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink are manufactured. A method for producing an inkjet ink set for textile printing, characterized in that a chlorine ion content is 300 ppm or less and a sulfate ion content is 300 ppm or less, respectively, by performing a purification treatment.   A manufacturing method of a printing inkjet ink set according to claim 2, wherein the yellow ink, the magenta ink, the cyan ink, the black ink, the orange ink, and the blue ink are manufactured. A method for producing an inkjet ink set for textile printing, characterized in that a purification treatment is carried out so that the calcium content is 200 ppm or less, the iron content is 20 ppm or less, and the magnesium content is 30 ppm or less, respectively.

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