JP2005163239A - Method for printing by inkjet form - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form an image close to an image sample on a cloth by using an original image sample or an image close to it, correcting the injection amount for each of the color inks (by increasing or decreasing) from color differences with a trial image obtained by printing, forming the image on a cloth by using the inks for the cloth and performing the printing. <P>SOLUTION: This method for inkjet printing is characterized by forming the trial image (2) on the cloth by using the ink for the cloth, obtaining the trial image (3) by performing an after-treatment, then obtaining the color differences (ΔE) from the original image, then performing the increase or decrease of the amounts of ink ejection proportional to the color differences (ΔE), forming the image (4) on the cloth by using the increased or decreased amounts of the ink ejections and then performing the after treatment to form the printed image on the cloth. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an ink-jet printing method, a fabric of natural fibers such as cotton, silk, hemp, and wool, a fabric of semi-synthetic fibers such as rayon and cupra, and a blend, blend, woven or blend of these fibers. The present invention relates to a textile printing method using a direct ink jet printing method in which an ink is directly applied to a textile product such as medical, textile, personal items, and small articles made from the fabric of No. 1 to form an image such as a pattern, a photograph, or a character.

  Conventionally, printing methods such as roller printing and screen printing have been used for printing fabrics such as nonwoven fabrics, woven fabrics, and knitted fabrics made of various natural fibers, semi-synthetic fibers, and synthetic fibers. In recent years, inkjet printing methods have also been proposed.

  In ink-jet textile printing, an image formed by a pattern, a photograph, text, or a mixture formed by ink ejected on the surface of a textile product such as a fabric, an image intended by the creator or the orderer, and a color or clearness There are many differences in terms of size.

  After the image is formed on the fabric and actually subjected to post-processing, i.e., steaming, heat treatment, washing with water, etc., the image remaining on the fabric becomes a printed image. The printed images formed on the fabric can be used for printing, such as discoloration peculiar to individual dyes, the residual (dyeing) rate by post-treatment of the used dyes depending on the individual dyes, and dropping off from the fabric at different rates. The density and hue (chromaticity) change from the image immediately after the ink is applied.

In Patent Document 1, an image obtained by an ink jet method is obtained with a printing ink on a pretreated fabric, and an image fixed on the fabric is obtained after a post-treatment step (fixing step). A method for obtaining a correction value from these color differences and printing the final image again is disclosed. However, since correction is performed by an image formed with textile printing ink on a preprocessed fabric, the intention of the creator or the orderer is often different in terms of color and clarity. The ink-jet image formed on the fabric is different from the original image sample, and there is no check for deviation from the original image, and the fabric is pretreated for printing with the fabric ink. Thus, an image sample or an image close to the original image is not always obtained.
JP 2003-247179 A

  Accordingly, the present invention uses an original image sample or an image close thereto, and corrects (increases or decreases) the ink discharge amount of each color from the color difference between the original image and the prototype image obtained after printing, on the fabric. The purpose is to form an image with fabric ink, perform printing, and form an image close to an image sample on the fabric.

  The present invention is a problem in textile printing by the ink jet method, the difference between the image brought in by the creator or the orderer and the image formed by ink jet on the fabric and subjected to various dye process post-treatments, particularly the color. It is an object of the present invention to provide an ink-jet printing method in which a difference in density and hue is solved and an image intended by a creator or an orderer is realized on a textile product.

That is, the present invention is achieved by the following means.
(Claim 1)
In ink-jet textile printing, a prototype image (2) is formed on a fabric with fabric ink, post-processed to obtain a prototype image (3), a chromaticity difference (ΔE) from the original image is obtained, and then the above color The ink discharge amount is increased or decreased in proportion to the degree difference (ΔE), and after the image (4) is formed on the fabric with the increased or decreased ink discharge amount, post-processing is performed to form a printed image on the fabric. An ink-jet printing method characterized by the above.
(Claim 2)
In ink-jet textile printing, a sample image (1) is first printed on a paper medium with dye ink from the original image data for printing using dye ink for image sample printing, and then a prototype image (2 ), Post-processing is performed to obtain a prototype image (3), and a chromaticity difference (ΔE) from the sample image (1) is obtained, and then in proportion to the chromaticity difference (ΔE). Ink jet method characterized in that the amount of ink discharged is increased and decreased, an image (4) is formed on the fabric with the increased and decreased amount of ink discharged, and then a post-processing is performed to form a printed image on the fabric. Textile printing method.
(Claim 3)
The ink-jet printing method according to claim 1 or 2, wherein the fabric ink is an ink-jet ink containing at least one selected from a reactive dye, a disperse dye, an acid dye, and a direct dye.
(Claim 4)
The ink-jet printing method according to any one of claims 1 to 3, wherein the cloth surface is pretreated in advance for applying the ink for the cloth.

  In the ink-jet printing method of the present invention, that is, in the ink-jet printing method for forming an image composed of a pattern, a photograph, a character, or the like on a fabric, a dye ink for image sample printing is used. An image sample is first printed as a sample image with a dye ink on a paper medium, then a prototype image is formed on the fabric with a fabric ink, post-processed, and then the chromaticity difference (ΔE) between the remaining prototype image and the sample image Ink-jet printing method in which the ink discharge amount is increased or decreased in proportion to the ΔE, and an image suitable for actual production is formed on the fabric with the increased or decreased ink discharge amount. The image intended by the orderer can be reproduced on the fabric, which is extremely effective.

  Next, the best mode for carrying out the present invention will be described, but the present invention is not limited thereto.

  The original image from the producer or the orderer is captured by a scanner or created in a computer so that the image intended by the producer or the orderer is realized on the fiber by printing, and this image is displayed on the display. After the image displayed on the display is finely adjusted as necessary, the image is intended by the producer or the orderer.

  In addition, there is a case where a request is made by the client as an original image (there are various images such as photographs, electronic photographs, and IJ images).

  Therefore, an original image (which may be a photograph or an IJ image) is an original image brought in by a producer or an orderer or image data normally displayed on a CRT.

  In Japanese Patent Laid-Open No. 2003-247179, in a textile inkjet printer, a chromaticity difference between an inkjet image formed on a fabric and an image after textile printing is obtained, and an amount proportional to the chromaticity difference and an ejection amount of fabric ink are set. By increasing / decreasing and printing again, a method has been adopted in which the chromaticity (color appearance) of the CRT image read by the original image or scanner and confirmed by the orderer matches the chromaticity after printing. Yes.

  In the present invention, the intention of the producer or the orderer is confirmed by an original print or by an ink jet print formed on a paper medium using dye ink based on the image data instead of the image data on the CRT. As a sample image, the ink discharge amount of the printing ink is obtained in advance by using the color difference between this and the printed image that remains after the post-treatment, i.e., steaming, heat treatment, and water washing. By increasing / decreasing using the relationship between the color difference and the ink discharge amount, and printing again on the fabric, a printed image in which the color difference from the original image or the ink jet print based thereon is corrected is obtained.

  Rather than the original image, the requests from the producer and the orderer are often those in which the original image is captured by a scanner or created in a computer, so it is displayed on the display and fine-tuned as necessary. Or because the image is intended by the client. It is preferable that a sample image in which the image data is once printed on a paper medium is created with dye ink, thereby confirming the producer or the orderer.

  When the original image is used as it is as a sample image, the color difference from the corresponding pixel formed on the printed fabric is measured for each pixel, and the ink ejection amount is corrected, for example, by a method as described later. This is achieved by applying and printing again.

  In addition, the image taken from the scanner and confirmed on the monitor is formed on a paper medium using dye ink based on the image, and the inkjet image confirmed by the orderer as a hard copy is used as a sample image and this. After the image is formed on the fabric with ink, the printing ink is ejected when the next final image is obtained by using the respective color differences (ΔE) of the corresponding pixel points of the printed image remaining after post-processing. Increase / decrease in amount From the previously set relationship between the color difference and the ink discharge amount, the corrected ink discharge amount for printing at the time of creating the final image is obtained, and the image printed with the printing ink is printed accordingly. After the formation, post-treatment such as steaming, heat treatment, and rinsing can be performed to reduce the color difference from the sample image.

  In the present invention, when the original image is image data captured by a scanner or the like, it is preferable that the sample image (1) is printed on the paper medium with dye ink for image sample printing in ink jet printing.

  The ink jet device for forming the sample image (1) on the paper medium using the dye ink may be a separate device from the ink jet device for printing according to the present invention, and the ink jet ink for printing according to the present invention. The apparatus may have a configuration in which an ink jet apparatus portion that forms a sample image (1) on a paper medium by using dye ink is mounted.

  As a result, in the present invention, the image data captured from the scanner and confirmed on the monitor is printed as a sample image (1) on a paper medium and can be confirmed by the orderer or the like as a print. Subsequently, after forming a prototype image (2) with fabric ink on the fabric, post-processing it, obtaining a prototype image (3) and obtaining a chromaticity difference (ΔE) from the sample image (1), Next, the ink discharge amount is increased or decreased in proportion to the chromaticity difference (ΔE), and the image (4) is formed on the fabric with the increased or decreased ink discharge amount, and post-processing is performed on the fabric. A printed image is formed.

  When an original image is not available, it is preferable to create a sample image in which image data is once printed on a paper medium with dye ink.

  The sample image (1) has been subjected to data processing so that the sample image (1) has a chromaticity close to that of the original image and has an appearance (chromaticity) close to this from the image data captured from the scanner and confirmed on the monitor (that is, the ink ejection amount). Etc. are preferably adjusted).

  According to the present invention, an original image is used as a sample image, and dye ink is used with an optimized ink discharge amount that is color-corrected (image processing) and optimized so that it looks the same as the image confirmed by the orderer on the CRT. Since the orderer's intention can be confirmed by using the sample image (1) formed on the paper medium, the color difference between these and the printed image formed by printing with the fabric ink is used as the sample image. By determining the ink ejection amount of the final image so as to correct, an image closer to the intention of the orderer or the producer can be obtained.

  As a result, it is possible to perform correction with higher accuracy than correction from a color difference between an image formed by applying a printing ink as described in JP-A-2003-247179 on a fabric and a post-printing image remaining after post-processing. is there. In the latter case, the chromaticity (appearance) is further different from the fact that the cloth and the image printed on paper etc. are clearly different and the cloth is pretreated for printing. Because.

  When the prototype image (2) is created by printing on the fabric pre-treated with the printing ink in accordance with the sample image (1) or the image data confirmed by the orderer on the CRT, the prototype is produced. The image (2) is a temporary image, and the ejection amount of the printing ink for forming the prototype image (2) may be provisional, but the prototype image (3) after post-processing this is shown in FIG. In consideration of the chromaticity deviation (color difference) from the sample image (1), the amount of ink applied by the printing ink of the image (4) is adjusted, and the prototype image (2) contains the printing ink. Since it is formed by applying on a fabric, it does not strictly match chromaticity. For example, at each corresponding pixel point (part), Y in the prototype image (2) , M, C, K, etc. textile ink ejection Is set to a discharge amount that matches the Y, M, and C concentrations (absorbance) of the dye ink in the sample image (1), or the ink shot amount at this stage is, for example, on the original image or the CRT. The ink shot amount (ejection amount) is greatly corrected by at least adjusting the color so that the chromaticity confirmed by the producer or client at the site is correlated with the same (close) image. This is preferable because the finish of the final image can be matched with the sample image without performing the above process.

  Next, an embodiment of a method for increasing / decreasing the ink discharge amount from the color difference (ΔE) in the present invention will be described.

  Increasing or decreasing the ink discharge amount based on the color difference (ΔE) between the prototype image (3) formed from the prototype image (2) and the original image or the sample image (1) increases or decreases the ink discharge amount for each ink in advance. In the light of this relationship, the chromaticity of each pixel of the original image or the sample image (1) and each of the corresponding pixels in the corresponding prototype image (3) are obtained. The increase / decrease of each ink discharge amount may be determined for each pixel from the difference from chromaticity (ΔE).

  FIG. 1 shows a sample image (1) recorded on a paper medium, a prototype image (2) formed on a fabric with a printing ink according to the sample image, and the fabric by post-processing such as steam processing and heat treatment. A prototype image (3) remaining and fixed above is shown.

For example, the chromaticity coordinates _{Y 1 = (L 1, a} * 1, b * 1) in the pixel point with a sample image (1) color in the same pixel points formed on the fabric, the trial image (3) It is reproduced as a color with a degree coordinate Y ₂ = (L ₂ , a ^* ₂ , b ^* ₂ ).

FIG. 2 shows a chromaticity diagram in the La ^* b ^* system as viewed from the lightness axis direction, and the color change is shown on the chromaticity diagram.

  In FIG. 2, in printing by the ink jet method according to the present invention, the Y line is a line plotting the yellow ink discharge amount and the chromaticity coordinate points formed on the fabric after printing with this discharge amount. . Similarly, for M ink and C ink, a line indicating the movement of chromaticity coordinates when these inks are increased can be obtained experimentally. This indicates a change in chromaticity due to increase or decrease of ink.

For example, a line when increasing or decreasing the ink discharge amount represented by Y, M, C or the like plotted on the chromaticity diagram, that is, a correspondence table of the ink discharge amount and the chromaticity point obtained thereby is used. Thus, the chromaticity change (Y ₁ → Y ₂ ) can be corrected.

That is, the pixel point of chromaticity Y ₁ = (L ₁ , a ^* ₁ , b ^* ₁ ) in a pixel of the sample image (1) is the prototype image (3), and Y ₂ = (L ₂ , a ^* ₂ , When b ^* ₂ ), the color difference is expressed by a distance ΔE between them, which is a vector quantity having a direction.

The color difference (ΔE) between Y ₁ and Y ₂ plotted on this chromaticity diagram is returned along the line when the yellow ink discharge amount represented by the precursor Y is increased or decreased, and M is similarly returned. (FIG. 2), the correction amount of the discharge amount of yellow ink and magenta ink can be obtained. If the ink discharge amount is increased or decreased accordingly, the color difference can be corrected. For C, the ink discharge amount can be corrected in exactly the same manner.

In this way, by using the plot on the chromaticity diagram when the ink discharge amount is increased or decreased for Y, M, and C (showing the relationship between the ink discharge amount and the chromaticity obtained thereby), since the correction amount is understood about the discharge amount of each ink, a prototype image based on this (4) be formed in the cloth for ink, it is possible to make the image obtained after printing the original chromaticity point Y _1.

  Since these processes are performed at a large number of pixel points, for example, color patches made of, for example, Y, M, C, and K inks are printed on the sample image (1), and the sample image (1 The color difference (ΔE) between this color patch and the color patch of the prototype image (3) after printing is obtained, and the discharge amount for each ink is obtained by referring to the data indicating the change in chromaticity due to the increase or decrease of the ink. Determine the degree of increase or decrease. For example, in the prototype image (3), the color of the Y patch is lighter than that of the sample image (1). To match this with the yellow patch of the sample image (1) as the chromaticity, the color by increasing or decreasing the Y ink is used. The ink discharge amount that must be increased from the distance between the two points where the respective chromaticity points are projected on the line plotted on the chromaticity diagram with the data indicating the change in the degree is obtained. As a result, an increase in the discharge amount of Y ink is obtained, and a good result can be obtained by a method of increasing the discharge amount of Y ink for textile printing at a uniform ratio in the formation of image (4). The same discharge amount correction can be applied to other inks such as C, M, and K using other color batches.

  Since a sufficient effect can be obtained by correcting the ink discharge amount at several points as described above, in practice, the sample image (1) and the prototype images (2) and (3) are corrected together with the image. It is preferable to create a color patch for the above.

  Even when there is no color patch, the chromaticity difference (ΔE) is taken between the sample image (1) and the prototype image (3) at some specific pixel points, and Y, M, C, K, etc., respectively. Each of the fabric inks can be corrected using, for example, an average value of increase / decrease values between several pixel points.

  When the original image is used as a sample image, several representative pixel points are taken as described above, and the chromaticity shift (difference) of the corresponding portion is obtained. For each color, the average value at each pixel point is obtained. You can get pretty good results with the correction method.

  In the present invention, in many cases of combinations of the type of fabric, pre-treatment prescription to the fabric, dye type to be used, post-treatment pre-printing after ink jet printing, etc., each of these ink discharge amounts and colors on the chromaticity diagram The movement of the point (correspondence table) can be taken into a computer and converted into a database so that it can be adapted to perform correction in a variety of ink-jet printing methods. Thereby, the increase / decrease of the ink discharge amount can be determined by computer processing from the actually measured chromaticity difference (ΔE), and the color difference can be corrected.

  In the present invention, as the ink-jet ink used for forming the image sample (1), there are various types of original images such as photographs, electrophotography, thermal transfer, and handwritten images by paints, or they are captured by a scanner or the like. In addition, since it is image data created in a computer and confirmed on a CRT, an aqueous dye ink that is used for reproducing a high-definition image used in a normal inkjet method and has a wide color reproduction range is preferable.

  Examples of water-soluble dyes used in these dye inks include water-soluble direct dyes and / or acid dyes and / or reactive dyes and / or basic dyes. These dyes are used by dissolving in a solvent to be appropriately selected and used as desired. The typical ones are listed as follows. Of course, these are representative and other dyes with similar structures may be used.

<Direct dye>
C. I. Direct yellow: 1, 4, 8, 11, 12, 24, 26, 27, 28, 33, 39, 44, 50, 58, 85, 86, 100, 110, 142, 144
C. I. Direct Red: 1, 2, 4, 9, 11, 13, 17, 20, 23, 24, 28, 31, 33, 37, 39, 44, 47, 48, 51, 62, 63, 75, 79, 80 81, 83, 89, 90, 94, 95, 99, 220, 224, 227, 243
C. I. Direct blue: 1, 2, 6, 8, 15, 22, 25, 71, 76, 78, 80, 86, 87, 90, 98, 106, 108, 120, 123, 163, 165, 192, 193, 194 195, 196, 199, 200, 201, 202, 203, 207, 236, 237
C. I. Direct black: 2, 3, 7, 17, 19, 22, 32, 38, 51, 56, 62, 71, 74, 75, 77, 105, 108, 112, 117, 154
<Acid dye>
C. I. Acid Yellow: 2, 3, 7, 17, 19, 23, 25, 29, 38, 42, 49, 59, 61, 72, 99
C. I. Acid orange: 56, 64
C. I. Acid Red: 1, 8, 14, 18, 26, 32, 37, 42, 52, 57, 72, 74, 80, 87, 115, 119, 131, 133, 134, 143, 154, 186, 249, 254 256
C. I. Acid violet: 11, 34, 75
C. I. Acid Blue: 1, 7, 9, 29, 87, 126, 138, 171, 175, 183, 234, 236, 249
C. I. Acid green: 9, 12, 19, 27, 41
C. I. Acid Black: 1, 2, 7, 24, 26, 48, 52, 58, 60, 94, 107, 109, 110, 119, 131, 155
<Reactive dyestuff>
C. I. Reactive yellow: 1, 2, 3, 13, 14, 15, 17
C. I. Reactive Red: 2, 6, 11, 23, 36
C. I. Reactive violet: 2, 4, 8, 9
C. I. Reactive loop: 7, 14, 15, 18, 21, 25
<Basic dye>
C. I. Basic yellow: 11, 14, 21, 32
C. I. Basic Red: 1, 2, 9, 12, 13
C. I. Basic violet: 3, 7, 14
C. I. Basic blue: 3, 9, 24, 25
The composition of the dye ink is as described in the publicly known literature. In addition to the water-soluble dyes described above, inorganic alkali agents such as alkali metal hydroxides, pH adjusters such as monoethanolamine and diethanolamine, alcohol Ink solvents typified by polyhydric alcohol ethers, various surfactants, for example, anionic surfactants and nonionic surfactants can be preferably used. Moreover, a polymeric surfactant can also be used.

  Examples of the dye ink include water-soluble polymers such as glue, gelatin, polyvinyl alcohols, and polyvinylpyrrolidones, or water-insoluble polymer dispersions (also referred to as latex), such as styrene-butadiene copolymers, polystyrene, acrylonitrile- You may contain latexes, such as a butadiene copolymer, an acrylate ester copolymer, a polyurethane, a silicon-acrylic copolymer, and an acrylic modified fluorine resin.

  In addition to the above, in dye inks, other known additions may be added as necessary in accordance with the purpose of improving the emission stability, print head and ink cartridge compatibility, storage stability, image storage stability, and other performances. An agent such as a viscosity modifier, a specific resistance modifier, a film forming agent, an ultraviolet absorber, an antioxidant, a fading inhibitor, an antifungal agent, and a rust inhibitor can be appropriately selected and used.

  As a paper medium (recording medium) for printing with the dye ink according to the present invention to form a sample image, a swollen recording medium using a water-soluble binder such as gelatin or polyvinyl alcohol as an ink absorbing layer, or Any recording medium that is a mixture of fine particles such as alumina or silica and a water-soluble binder applied to form a void-type ink absorbing layer may be used, and it is particularly selected if it has good color development and can reproduce color faithfully to the image data. However, a void type in which the ink absorption speed of the recording medium is high and the amount of absorption is large is preferable. Moreover, the thing with glossiness is preferable.

  In the present invention, the ink jet (print) method for forming a sample image on a paper medium is the same as that applied to textile printing, but there are various methods such as a thermal ink jet method, a piezo ink jet method, a bipolar deflection method, a multi deflection method, and the like. Without being limited to one of the ink jet methods, printing can be performed by an ink jet method that is appropriately selected and adopted from them. Among them, the piezo ink jet method in the present invention is preferable. The printer that creates the sample image by printing on the paper medium with the dye ink may be another printer, or the textile inkjet printer may include a printer unit with the dye ink as part of the apparatus.

  Fabrics used in the inkjet printing method of the present invention include non-woven fabrics, woven fabrics, and knitted fabrics. For example, fabrics of natural fibers such as cotton, silk, hemp, wool, cupra, rayon, diacetate, etc. Semi-synthetic fiber fabrics, synthetic fiber fabrics such as polyester, polyacryl, polyamide, triacetate, and the like, fabrics made from these fibers, blended fabrics, mixed woven fabrics and knitted fabrics, and clothing made from these fabrics, Textile products such as textiles, personal items, and small articles such as sign tags are preferred, but are not limited thereto.

  The above-described fabric may be applied as it is to the fabric to which the ink-jet printing method in the present invention is applied. However, preferably, the fabric surface is smoothed beforehand by means such as pressing or sintering. In order for these fabrics to accurately receive the inkjet ink for fabrics and to obtain a clear image, the fabric is impregnated, coated, sprayed with a thin layer such as a bleeding prevention layer, an ink receiving layer or a water repellent layer in advance. What provided what is called pre-processing provided using means, etc., and what gave two or more types of said means can use more preferably. The fabric subjected to the pretreatment in the present invention is pretreated with an aqueous dispersion or solvent dispersion (hereinafter referred to as “pretreatment agent”) containing, for example, a water-soluble resin and a softener or fine powder. It is a thing.

  Examples of the water-soluble resin that can be used in the present invention include oxidized starch, methyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, tragacanth gum, guar gum, gum arabic, sodium alginate, soda polyacrylate, polyvinyl alcohol, polyvinyl pyrrolidone, and polyacrylamide. , Polyethylene oxide, polyarylamine hydrochloride, polydiaryldimethylammonium chloride, casein and the like. Of these, sodium alginate and carboxymethyl cellulose can be preferably used. Moreover, you may add a pH adjuster to the said pretreatment agent as needed. Examples of pH adjusters include phosphoric acid, hydrochloric acid, sulfuric acid, boric acid, silicic acid, acetic acid, carbonic acid, citric acid, tartaric acid, maleic acid, phthalic acid, and alkali metal salts, ammonium salts, triethylamine salts, triethanolamine salts, And caustic soda, triethanolamine and the like.

  The amount of the pretreatment agent used in the present invention applied to the fabric is 0.1 to 30% by weight with respect to the fabric, and the method for applying the fabric to the fabric can be performed by any one of coating, impregnation, and spraying. . When the fabric is pretreated with the pretreatment agent, the image formed by the fabric ink is suppressed from blurring, and the dye is deposited on the surface of the fabric, so that the dye deposition rate is improved and sufficient color density, depth and Sharpness can be obtained. It is desirable to change the pH of the pretreatment agent used in the present invention depending on the type of fabric. For example, in the case of cotton, silk, hemp and rayon, the pH is controlled to be alkaline, and in the case of nylon, the pH is controlled to be acidic. In the case of acetate and polyester, the vicinity of neutrality is preferable.

  The fabric ink that can be used in the present invention is an ink containing one selected from reactive dyes, disperse dyes, acid dyes, direct dyes, and the like, and an ink of an optimal dye is used according to the type of fabric. be able to. As constituent components of these fabric inks, dyes, water, water-soluble organic solvents, pH adjusters, antifungal agents, surfactants, water-soluble resins, and the like are appropriately used. Examples of the water-soluble organic solvent include glycols, glycol ethers, and nitrogen-containing solvents. As the surfactant, any of nonionic, anionic, cationic, and amphoteric active agents can be used, and they are properly used according to the purpose. Printing with inkjet ink, that is, image formation (printing or printing) is performed by applying ink by scanning a printer recording head on a cloth or the like. After this printing, a treatment such as a color development treatment is performed, followed by washing and drying to obtain a desired finished dyed product (finished printed product).

  The ink-jet printing method in the present invention is not limited to one of various ink-jet methods such as a thermal ink-jet method, a piezo ink-jet method, a bipolar deflection method, and a multi-deflection method. The inkjet printing method according to the present invention is optimally used for a piezo inkjet method, and a specific image, character, or pattern is printed using a piezo inkjet printer. Is printed on a fiber product or fabric and fixed by post-treatment to obtain the most preferable dyed product of fiber product.

  The textile ink for textile printing in the present invention is an inkjet ink containing one kind selected from reactive dyes, disperse dyes, acid dyes and direct dyes, and the dyes used in these textile inks are not particularly limited. A known dye is used instead. Preferred examples of reactive dyes include C.I. I. Reactive Yellow 2, 3, 14, 15, 21, 23, 25, 26, 27, 29, 34, 50, 52, 75, 76, 77, 81, 82, 83, 84, 85, 87, 88, 92 95, 98, 111, 115, 116, 135; I. Reactive Red 3, 13, 17, 21, 22, 23, 24, 35, 37, 40, 41, 43, 45, 55, 56, 58, 63, 68, 78, 80, 81, 82, 83, 84 85, 86, 87, 100, 106, 111, 112, 117, 120, 131, 147, 158, 170, 171, 172, 176, 226; I. Reactive Blue 3, 13, 15, 17, 21, 25, 26, 27, 38, 39, 40, 42, 43, 49, 50, 51, 52, 65, 68, 78, 80, 89, 94, 98 , 100, 105, 113, 112, 147, 158, 177, 182, 187, and the like.

  Preferred examples of the disperse dye include C.I. I. Disperse Yellow 3, 5, 13, 24, 30, 33, 34, 42, 44, 49, 50, 54, 60, 66, 71, 76, 79, 82, 83, 85, 86, 88, 91, 98 , 114, 116, 118, 122, 135, 140, 141, 160, 179, 180, 182, 186, 198, 202, 210, 211, 215, 216, 224; I. Disperse Red 4, 5, 13, 15, 27, 43, 44, 45, 50, 52, 55, 56, 59, 60, 65, 72, 75, 76, 77, 81, 82, 86, 88, 92 96, 103, 105, 106, 108, 111, 113, 117, 118, 121, 126, 128, 131, 135, 137, 145, 151, 152, 153, 157, 164, 169, 177, 181, 185 188, 190, 192, 200, 201, 202, 203, 205, 206, 210, 221, 225, 239, 277, 278, 281, 288, 296, 303, 310, 311, 312, 320, 324, 328 C. I. Disperse Blue 1, 3, 7, 9, 14, 16, 19, 20, 26, 35, 43, 54, 55, 56, 58, 60, 62, 70, 72, 75, 79, 81, 82, 87 91, 93, 95, 102, 106, 118, 120, 122, 125, 128, 130, 139, 141, 142, 143, 148, 149, 153, 158, 167, 171, 173, 176, 181, 183 185, 187, 189, 198, 200, 201, 224, 225, 259, 267, 268, 270, 287, 288, 295, 297, 301, 315, 330, and the like.

  Preferred examples of the acid dye include C.I. I. Acid Yellow 17, 19, 25, 39, 40, 42, 44, 49, 50, 61, 64, 76, 79, 110, 127, 135, 151, 159, 169, 174, 190, 195, 196, 197, 218, 219, 222, 227; I. Acid Red 35, 42, 57, 62, 80, 82, 111, 114, 118, 119, 127, 128, 131, 143, 151, 154, 158, 249, 257, 261, 263, 299, 301, 336, 337, 361, 397; I. Acid Blue 25, 40, 41, 62, 72, 76, 78, 80, 82, 92, 106, 112, 113, 120, 127, 138, 143, 175, 181, 205, 207, 220, 221, 232, 247, 258, 260, 264, 271, 277, 278, 280, 288, 290, 326 and the like.

  Preferred examples of direct dyes include C.I. I. Direct yellow 8, 9, 11, 12, 28, 29, 33, 35, 41, 44, 50, 53, 58, 68, 86, 87, 95, 96, 98, 100, 106, 108, 110, 130, 142, 161, 163; I. Direct Red 2, 4, 9, 23, 26, 31, 62, 63, 72, 75, 80, 81, 83, 84, 95, 111, 173, 184, 207, 211, 212, 218, 223, 225, 227, 232, 240, 242, 243, 247; Direct Blue 1, 10, 15, 22, 25, 55, 67, 68, 71, 76, 80, 84, 86, 90, 98, 106, 151, 158, 189, 211, 213, 218, 229, 236, 237, 244, 248, 249, 251, 252, 264, 270, 280, 288, 289, 291 and the like, but are not limited to these exemplified dyes. Absent.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these.

  Water-based dye ink for image sample printing: Full-color printing was performed on Konica QA paper with the inks [K], [Y], [M], and [C] shown below.

  The printed image was designated as a sample image (1). Each color patch for correction was simultaneously printed on the sample image.

  Next, carboxymethylcellulose, sodium alginate, a pH adjuster, a softening agent, and water were mixed to prepare a pretreatment liquid. The polyester fabric was sufficiently impregnated with this pretreatment liquid, and then squeezed at a drawing ratio of 70% and dried at 110 ° C. to obtain a pretreatment cloth.

  In order to obtain the same full color on the fabric with the disperse dye inks K, Y, M, and C shown below on the pretreated fabric, the image is printed with a predetermined ink amount (A), and a prototype image (2) Got.

  The amounts of the dispersed inks K, Y, M, and C are the water-based dye ink and inks [K], [Y], [M], and [C] used in the printing for the image sample, and B, G, and R, respectively. , And the ink discharge amount at which the K absorbance was the same.

  The fabric on which the prototype image (2) was formed was treated with water vapor at 110 ° C. for 20 minutes, and then the laundry was dried for 10 minutes to obtain a printed product. This image is a prototype image (3).

  The prototype image (3) and the sample image (1) are clearly different in color density and hue by visual judgment.

  In the sample image (1), color patches of Y, M, C, and K are printed, and the same color of the same color patch in the prototype image (3) is compared (obviously different), respectively. Was measured using a photoelectric spectrophotometer, and the difference in chromaticity (ΔE) between the prototype image (3) and the sample image (1) was obtained.

  In addition, for each of the disperse dye inks of Y, M, C, and K, when the ink was printed on the cloth in advance, chromaticity points were plotted according to the increase in the ink discharge amount in the post-processing conditions. A relational expression between the discharge amount and the chromaticity change due to the discharge amount was obtained.

  Using this data, computer processing is performed to correct the chromaticity difference (ΔE) of each color patch, the ink ejection amount is corrected, and the ink amount (B) obtained by adding or subtracting the predetermined ink amount (A). In order to obtain a full-color prototype image (4) again on the pretreated fabric. The obtained prototype image (4) was treated with water vapor at 110 ° C. for 20 minutes, then washed for 10 minutes and dried to obtain a final printed image. The obtained printed image was hardly visually perceived by the color density difference and hue between the sample image (1) and the sample image (1).

《Water-based dye ink》
Black ink [K] C.I. I. Ink consisting of Direct Black 68, glycerin, triethylene glycol monobutyl ether, water Yellow ink [Y] C.I. I. Ink consisting of Direct Yellow 86, triethylene glycol, triethylene glycol monobutyl ether, water Magenta ink [M] C.I. I. Ink consisting of Direct Red 249, glycerin, triethylene glycol monobutyl ether, water Cyan ink [C] C.I. I. Direct Blue 199, PEG # 200, Olefin E1010 (manufactured by Shin-Etsu Chemical), water ink << disperse dye ink >>
Black ink K C.I. I. Disperse Black 1, ink composed of dipotassium monohydrogen phosphate, potassium dihydrogen phosphate, glycerin, ethylene glycol, preservative (isothiazolone chloride), water Yellow ink Y C.I. I. Disperse Yellow 30 Ink made of dipotassium monohydrogen phosphate, potassium dihydrogen phosphate, glycerin, ethylene glycol, preservative (isothiazolone chloride), water Magenta ink MC I. Disperse Red 5, dipotassium monohydrogen phosphate, potassium dihydrogen phosphate, glycerin, ethylene glycol, preservative (isothiazolone chloride), water cyan ink C C.I. I. Disperse Blue 330, dipotassium monohydrogen phosphate, potassium dihydrogen phosphate, glycerin, ethylene glycol, preservative (isothiazolone chloride), water ink

A sample image (1), a prototype image (2), and a prototype image (3) are shown. The change of the color on a chromaticity diagram is shown.

Claims (4)

In ink-jet textile printing, a prototype image (2) is formed on a fabric with fabric ink, post-processed to obtain a prototype image (3), a chromaticity difference (ΔE) from the original image is obtained, and then the above color The ink discharge amount is increased or decreased in proportion to the degree difference (ΔE), and after the image (4) is formed on the fabric with the increased or decreased ink discharge amount, post-processing is performed to form a printed image on the fabric. An ink-jet printing method characterized by the above. In ink-jet textile printing, a sample image (1) is first printed on a paper medium with dye ink from the original image data for printing using dye ink for image sample printing, and then a prototype image (2 ), Post-processing is performed to obtain a prototype image (3), and a chromaticity difference (ΔE) from the sample image (1) is obtained, and then in proportion to the chromaticity difference (ΔE). Ink jet method characterized in that the amount of ink discharged is increased and decreased, an image (4) is formed on the fabric with the increased and decreased amount of ink discharged, and then a post-processing is performed to form a printed image on the fabric. Textile printing method. The ink-jet printing method according to claim 1 or 2, wherein the fabric ink is an ink-jet ink containing at least one selected from a reactive dye, a disperse dye, an acid dye, and a direct dye. The ink-jet printing method according to any one of claims 1 to 3, wherein the cloth surface is pretreated in advance for applying the ink for the cloth.

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