JP2019025854A - Printer, manufacturing method of printed matter and printed matter - Google Patents

Abstract

To provide printed matter new to look at.SOLUTION: When wetting printed matter 1 with water, a first part where an image 5 is not printed among the printed matter 1 is excellently wetted, and a second part where the image 5 is printed is hardly wetted due to being lower in a water absorption percentage than the first part by a water repellent agent. Thus, when wetting the printed matter 1, a light transmission factor is different between the first part and the second part, and an appearance is different between the first part and a second part, so that the image 5 is floatingly seen. Due to being different in the water absorption percentage of respective parts where respective images 5A-5D are formed, an appearances of the images 5A-5D are also different. For example, when wetting the printed matter 1 in a table of a black color, the first part is seen darkly due to the table, and is seen darkly in order of an image 5D>an image 5C>an image 5B>an image 5A (the image 5A is seen most whitely).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a printer, a method for manufacturing a printed matter, and a printed matter.

  2. Description of the Related Art Conventionally, printed materials that have been printed with ink that changes the liquid absorption rate have been developed. For example, Patent Document 1 discloses a printed material (a fiber structure in Patent Document 1) on which an image (a pattern in Patent Document 1) is printed with an ink containing a water repellent.

JP 2007-162154 A

  In the printed matter described in Patent Document 1, only the region where the ink for changing the liquid absorption rate is applied and the region where the ink is not applied are formed, and the ink is solidly applied in the region where the ink is applied. The design was commonplace.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printer and a method for producing a printed material that can produce a new printed material.
Another object of the present invention is to provide a new printed material.

(1) A printer according to the first aspect of the present invention provides:
An ink application unit that applies ink that changes the liquid absorption rate of the medium to the medium;
A controller that controls the amount of ink applied to the medium by the ink application unit,
Printing is performed such that the liquid absorptance differs between the first region and the second region where the ink is applied on the medium due to the difference in the coating amount per unit area of the ink controlled by the control unit.

  The appearance of the first region and the second region when the printed matter manufactured (printed) by the printer is wetted with liquid, or the appearance of the first region and the second region when the printed matter is colored with a dye or the like, This is different from the appearance of these regions when ink that changes the liquid absorption rate is not applied. Further, the first region and the second region have different appearances due to the difference in liquid absorption rate. These are caused by the difference in wetness or coloring degree. Therefore, the printed matter has a new appearance. At the time of printing, in addition to the first area and the second area, the liquid absorption rate can be set in at least three stages by forming the third area where the ink is not applied on the medium. The appearance of the printed matter is even newer. As described above, according to the above configuration, it is possible to manufacture a new printed product.

(2) The printer
Printing an image having a gradation in which the liquid absorption rate gradually changes due to a difference in coating amount per unit area of the ink;
You may do it.

  According to the above configuration, when the printed material is wetted with a liquid, or when the printed material is colored, gradation appears in the image, so that a new printed material can be produced.

(3) In the printer,
The ink is an ink containing a water repellent,
The ink application unit is a print head that applies the ink to the medium by an inkjet method.
You may do it.

  According to the above configuration, it is possible to easily manufacture (print) a new printed material with an appearance. Furthermore, the image formed with ink can be easily refined by inkjet.

(4) In the printer,
The ink is an ink that improves the liquid absorption rate,
The ink application unit is a print head that applies the ink to the medium by an inkjet method.
You may do it.

  According to the above configuration, it is possible to easily manufacture (print) a new printed material with an appearance. Furthermore, the image formed with ink can be easily refined by inkjet.

(5) A method for producing a printed material according to the second aspect of the present invention includes:
A printing step of printing one or more images by applying ink that changes the liquid absorption rate of the medium to the medium;
In the printing step, the one or more images are arranged so that the liquid absorption rate is different between the first area and the second area where the ink is applied on the medium due to a difference in application amount per unit area of the ink. Print.

  The appearance of the first region and the second region when the printed material manufactured (printed) by the manufacturing method is wet with a liquid, or the appearance of the first region and the second region when the printed material is colored with a dye or the like This is different from the appearance of these regions when ink that changes the liquid absorption rate is not applied. Further, the first region and the second region have different appearances due to the difference in liquid absorption rate. These are caused by the difference in wetness or coloring degree. Therefore, the printed matter has a new appearance. At the time of printing, in addition to the first area and the second area, the liquid absorption rate can be set in at least three stages by forming the third area where the ink is not applied on the medium. The appearance of the printed matter is even newer. As described above, according to the above configuration, it is possible to manufacture a new printed product.

  The first area and the second area may be areas in one image to be printed, or may be areas in each of the two images. The first area may form one image, and the second area may form another image.

(6) The method for producing the printed matter includes:
A coloring step of coloring the medium by bringing a coloring liquid into contact with the medium on which the printing has been performed;
The colored media is different in coloring degree between the first area and the second area.
You may do it.

  According to the above configuration, the first region and the second region have different coloring degrees, whereby a new appearance of colored printed matter can be manufactured.

(7) The printed matter according to the third aspect of the present invention is
A printed matter on which an image is printed with a material that changes the liquid absorption rate,
The first region and the second region are provided with a first region and a second region to which the material is fixed, and the liquid absorption rate is different between the first region and the second region due to a difference in the amount of the fixed material per unit area.

  According to the above configuration, the appearance of the first region and the second region when the printed material is wetted with liquid, or the appearance of the first region and the second region when the printed material is colored with a dye or the like absorbs liquid. This is different from the appearance of these areas when ink that changes the rate is not applied. Further, the first region and the second region have different appearances due to the difference in liquid absorption rate. These are caused by the difference in wetness or coloring degree. Therefore, the printed matter has a new appearance. In addition to the first region and the second region, the printed matter has a third region where no ink is applied, so that the liquid absorption rate can be set in at least three stages. It looks newer.

(8) The printed matter is
Colored prints,
The first region and the second region have different coloring levels.
You may do it.

  The printed matter having the above configuration is new in appearance because the coloring degree is different between the first region and the second region.

According to the printer and the printed material manufacturing method according to the present invention, a new printed material can be manufactured.
Moreover, according to the printed matter according to the present invention, the appearance is new.

The top view of the printed matter which concerns on one Embodiment of this invention. 1 is a configuration diagram of an ink jet printer according to an embodiment of the present invention. FIG. The figure explaining the method of expressing a gradation with the inkjet printer which concerns on one Embodiment of this invention. The top view of the printed matter which concerns on the modification of this invention.

  Hereinafter, a printer, a method for manufacturing a printed material, and a printed material according to an embodiment of the present invention will be described with reference to the drawings. In the following, a printed material will be described first, and then a printer, a method for manufacturing the printed material, and the like will be described.

(Printed matter 1)
As shown in FIG. 1, the printed matter 1 according to an embodiment of the present invention includes a white fabric 3 as a medium and an image 5 formed on the fabric 3.

  The fabric 3 is not particularly limited as long as it has water absorption. Examples of the fabric 3 include a fabric made of natural fibers such as cotton, silk and hemp, and a fabric made of chemical fibers such as polyester and nylon.

  A transparent water repellent (a specific example will be described later) is fixed on the fabric 3, and an image 5 (latent image) is formed by the water repellent. The portion of the fabric 3 where the image 5 is formed, that is, the portion where the water repellent is fixed, is coated with the fibers of the fabric 3 with the water repellent and has a water repellent function. Therefore, the water absorption rate of the part is lower than that of the part where the water repellent is not fixed. The water absorption rate can be measured by a known water absorption test. For example, it can be measured based on the water absorption rate method or surface water absorption method described in JIS L 1907: 2010.

  The image 5 includes images 5A to 5D. The amount of the water repellent per unit area in each of the images 5A to 5D is different from each other. Specifically, the amount per unit area of the water repellent in the image 5A is the largest, and the amount per unit area of the water repellent is decreasing sequentially for the images 5B, 5C, and 5D. As the amount of the water repellent agent per unit area decreases, the amount of fibers coated with the water repellent agent (the ratio of fibers coated with the water repellent agent) decreases, so the water absorption rate at that portion also decreases. Therefore, the water absorption is lower in the order of image 5A <image 5B <image 5C <image 5D.

  When the printed matter 1 is not wet with water, that is, when it is dried, the image 5 is not noticeable because the water repellent is transparent. On the other hand, when the printed material 1 is wetted with water, the first part of the printed material 1 where the image 5 is not printed is well wetted, and the second part where the image 5 is printed is more water-repellent than the first part. Low water absorption and difficult to wet. For this reason, when the printed material 1 is wetted, the first portion and the second portion have different light transmittances due to the difference in light transmittance between the first portion and the second portion, so that the image 5 appears to be raised. Furthermore, in this embodiment, the water absorption rates of the portions where the images 5A to 5D are formed are also different, and the appearance of the images 5A to 5D is also different. For example, when the printed material 1 is wetted on a black table, the first portion looks dark by the table, and looks dark in the order of image 5D> image 5C> image 5B> image 5A (image 5A looks whitest). As described above, the image 5 that emerges when the printed material 1 is wet has a light and dark gradation expressed by the images 5A to 5D. The printed matter 1 may include a fabric 3 on which an image 5 is formed and a backing fabric such as black. When the printed material 1 gets wet by the back fabric, the images 5A to 5D are clearly exposed.

(Printer configuration)
The printer 10 is an ink jet printer, and prints the image 5 by applying a transparent ink containing a water repellent (an ink that reduces the water absorption rate of the fabric 3) to the fabric 3. As shown in FIG. 2, the printer 10 includes a transport mechanism 11, an ink tank 12, an ink supply mechanism 13, a print head 14, a drive mechanism 15, a drying device 16, and a control unit 17.

  Examples of the water repellent include hydrocarbon compounds (having alkyl groups), paraffin compounds, fluorine compounds, pyridinium salts, N-methylol alkylamides, alkylethylene ureas, oxalin derivatives, silicone compounds, triazines. Examples thereof include, but are not particularly limited to, a compound based on zirconium, a compound based on zirconium, a compound based on wax, or a mixture thereof.

  The transport mechanism 11 transports the fabric 3. The transport mechanism 11 is constituted by a belt conveyor, for example. The transport mechanism 11 may include a table on which the fabric 3 is placed and a drive mechanism that drives the table.

  The ink tank 12 stores ink. The ink is used when printing the image 5 and is a transparent ink containing a transparent water repellent. The ink tank 12 is attached to the printer 10 as, for example, a cartridge type.

  The ink supply mechanism 13 supplies ink in the ink tank 12 to the print head 14. The ink supply mechanism 13 includes, for example, a sub tank that stores ink, and a supply pipe that supplies ink in the ink tank 12 to the sub tank. Further, the ink supply mechanism 13 includes a circulation pipe that forms a circulation path for circulating the ink stored in the sub-tank through the print head 14, a valve that controls circulation of the ink in the circulation path, and a driving device that drives the valve. And comprising.

  The print head 14 prints the image 5 by ejecting the ink supplied from the ink supply mechanism 13 onto the fabric 3 by the inkjet method. The print head 14 includes, for example, a storage chamber that stores ink, a piezoelectric element or heater that pushes out the ink stored in the storage chamber, and a nozzle that discharges the pushed ink.

  The drive mechanism 15 moves the print head 14 in a direction orthogonal to the conveyance direction of the fabric 3. The drive mechanism 15 includes, for example, a carriage on which the print head 14 is mounted, and a drive mechanism that moves the carriage in a direction (sub-scanning direction) orthogonal to the conveyance direction (main scanning direction) of the fabric 3. The drive mechanism 15 is, for example, a guide rail that supports the carriage so as to be movable in the sub-scanning direction, a pulling line that pulls the carriage, and a winding mechanism that winds the pulling line (one set at each end of the guide rail). ).

  The drying device 16 dries the surface (ink application surface) of the fabric 3 and dries the ink applied to the fabric 3. The drying device 16 may be, for example, a device that performs heat drying, and may be a heat press, an oven, or the like. By the drying, the ink is dried and the image 5 (water repellent) is fixed to the fabric 3.

  The control unit 17 includes a transport mechanism 11 (for example, the belt conveyor or the driving mechanism), an ink supply mechanism 13 (for example, the driving device), a print head 14 (for example, the piezoelectric element or the heater), and the driving mechanism 15. (For example, the winding mechanism) and the drying device 16 are controlled to perform a printing process for printing the image 5 on the fabric 3.

  In order to perform the printing process, the control unit 17 executes a storage device (hard disk, flash memory, etc.) that stores a program and various types of data and a program stored in the storage unit, and uses the various types of data to execute the printing process. Including a processor (CPU (Central Processing Unit), etc.), a main memory of the processor, and various interfaces. The control unit 17 may be a personal computer, for example.

(Printing process executed by the control unit 17 (method for manufacturing the printed matter 1))
The printed material 1 is manufactured by a printing process executed by the control unit 17. Hereinafter, the printing process will be described. The printing process is started when the image data of the image 5 is supplied from an external host computer or the like.

  In the printing process, the control unit 17 first controls the transport mechanism 11 to move the fabric 3 to the printing start position.

  Thereafter, the control unit 17 controls the drive mechanism 15 to move the print head 14 in the sub scanning direction. During this movement, the control unit 17 causes ink to be ejected from the print head 14 at the timing when the print head 14 reaches the position specified by the image data (position set for each pixel of the image). Thereby, the first line of the image 5 is printed. Thereafter, the control unit 17 controls the transport mechanism 11 to send the fabric 3 by one pixel in the main scanning direction. Thereafter, the control unit 17 prints the second line of the image 5 by ejecting ink while moving the print head 14 in the sub-scanning direction as described above. The control unit 17 repeats this and prints each line of the image 5. By printing each line, the entire image 5 is printed. In this way, the control unit 17 controls the relative movement of the print head 14 with respect to the fabric 3 (the fabric 3 side may be moved) and the amount of ink applied from the print head 14, and the image 5 To print. Note that a plurality of nozzles may be provided in the print head 14, and in this case, the control unit 17 sends the fabric 3 in the main scanning direction by the number of pixels corresponding to the number of the nozzles.

  Thereafter, the control unit 17 controls the transport mechanism 11 to transport the fabric 3 on which the image 5 is printed to the drying device 16, and causes the drying device 16 to dry the fabric 3. For example, when a water repellent such as hydrocarbon or fluorine is used and the fabric 3 is made of cotton and / or polyester, the heating temperature is 160 degrees and the heating time is 1 minute. When a water repellent such as hydrocarbon or fluorine is used and the fabric 3 is made of silk and / or wool, the heating temperature is 100 degrees and the heating time is 2 minutes. By such drying, the image 5 (water repellent) is fixed on the fabric 3, and the printed matter 1 is completed.

(About gradation)
In order to vary the amount of the water repellent per unit area (water absorption rate) in each of the images 5A to 5D and express gradation like the image 5, the amount of ink applied to the fabric 3 per unit area (fixing) The amount of the water repellent agent per unit area) may be different for each of the images 5A to 5D. Thereby, the amount (water absorption rate) per unit area of the water repellent can be made different for each of the images 5A to 5D. As one of the methods, there is a method in which the density of pixels that eject ink is different for each of the images 5A to 5D. The density of pixels ejecting the ink can be obtained by (pixels ejecting ink in a certain region (any of images 5A to 5D)) / (all pixels in the certain region). The above method is realized by designating a pattern of pixels for ejecting ink in the image data of the image 5 used for printing in accordance with the shades of the images 5A to 5D. For example, as shown in FIG. 3, the size of one drop of ink ejected from the print head 14 (ink ejection amount) is the same, and the density of pixels ejecting the ink is varied between the images 5A to 5D. For example, in the image 5A, ink is ejected to all the pixels (FIG. 3A), and in the image 5B, ink is ejected to the pixels at a ratio of 4/5 (of the five pixels as in the dotted square). Ink is ejected to four and ink is not ejected to one. (FIG. 3B) In the image 5C, ink is ejected to the pixels at a rate of 3/5 (as in the dotted square, Of the five pixels, ink is ejected to three, and ink is not ejected to two (FIG. 3C). In the image 5D, ink is ejected to the pixels at a rate of 1/5 (inside the dotted square) As shown in FIG. 3D, ink is ejected to one of the five pixels and ink is not ejected to four of the pixels. For example, image data of a negative film of an image to be printed may be created, and multi-tone printing with the ink may be performed based on the image data to express gradation.

  In addition, as another method of changing the application amount per unit area of the ink applied to the fabric 3, for example, the density of the pixels that discharge ink may be made constant and the amount of ink discharged may be changed. Good. For example, the ink discharge amount per pixel in the image 5A may be maximized, and the ink discharge amount per pixel may be gradually decreased sequentially for the images 5B, 5C, and 5D. Further, along with such a decrease in the ejection amount, the density of pixels that eject ink may be reduced.

(Summary of embodiments, effects, etc.)
The printer 10 has a print head 14 that applies an ink that changes the water absorption rate of the fabric 3 (a transparent ink containing a water repellent that lowers the water absorption rate) to the fabric 3 by an ink jet method, and the fabric by the print head 14. And a control unit 17 that controls the amount of ink applied (discharge amount) applied to 3, and the ink is applied to the fabric 3 due to the difference in the amount of ink applied per unit area controlled by the control unit 17. The images 5A to 5D are configured to perform printing so that the water absorption is different in each region. Then, depending on the amount of ink applied per unit area, the images 5A to 5D can be printed so that the water absorption rate is different in each region of the images 5A to 5D to which the ink is applied on the fabric 3, and the printed matter 1 can be manufactured. . The printed matter 1 includes regions of the images 5A to 5D to which the water repellent is fixed, and the water absorption rate is different in the regions of the images 5A to 5D due to a difference in the amount of the fixed water repellent per unit area. . In addition, the image 5 having the images 5A to 5D is an image having a gradation in which the water absorption rate is gradually changed by the images 5A to 5D.

  According to the said structure, a gradation can be provided to the image which floats when the printed matter 1 is made wet by varying the water absorption rate in the images 5A to 5D. Therefore, according to the present embodiment, it is possible to obtain the printed matter 1 which has an image with high design as well as being lifted when wet. Thus, the printed matter 1 according to this embodiment has a new appearance. Moreover, gradation can be easily expressed by forming the image 5 with an inkjet printer. Note that the image 5 may be formed by another printer. The printed matter 1 can be used as a cloth for a swimsuit that gets wet with water, a cloth for clothes that gets wet with sweat, an umbrella, and the like.

(Modification)
The present invention is not limited to the above embodiment. Various modifications may be made to the above embodiment. For example, each member described above, the shape of the image, and the like can be changed as appropriate. Hereinafter, other modified examples will be exemplified.

(Modification 1)
The water repellent may provide a water repellent function to a portion where the image 5 is formed by covering the entire surface of the fabric 3 or being buried in a gap between the fibers on the surface. Even in this case, by changing the amount of the water repellent per unit area in each of the images 5A to 5D, the water absorption can be made different in each of the images 5A to 5D. Moreover, you may vary the water absorption rate in each of the images 5A to 5D by using a waterproofing agent instead of the water repellent. Moreover, what wets the printed matter 1 may be liquid other than water. For example, when other liquid is oil, the image 5 is formed with an oil repellent. The material for forming the images 5A to 5D is applied to a medium (fabric 3 or the like) that is an object on which an image is to be formed, such as the water repellent, the waterproof agent, and the oil repellent. Any material may be used as long as the liquid absorption rate (water absorption rate, etc.) of the application portion of the material is changed as compared with that before application. The liquid absorptivity can be measured, for example, by changing the water in the method for measuring the water absorptivity such as the water absorptivity method or the surface water absorptivity described in JIS L 1907: 2010 to another liquid.

(Modification 2)
The fabric 3 may be changed to other media. For example, a sheet made of a synthetic resin, such as a sheet not having water absorption, provided with an ink receiving layer or the like may be used.

(Modification 3)
In FIG. 1, a circular figure having gradation is expressed by the formed image, but the figure or the like may be expressed by a part where the image is not formed or a part where the amount of the water repellent per unit area is small. Good. For example, an image in which the magnitude relation of the amount (water absorption rate) of the water repellent per unit area of the printed matter 1 in FIG. 1 is reversed is formed on the fabric 3, and the same figure as the figure represented by the image 5 in FIG. 1 is expressed. May be. Specifically, the water repellent in the order of a portion other than the image 5> a portion where the image 5D is formed> a portion where the image 5C is formed> a portion where the image 5B is formed> a portion where the image 5A is formed. The amount per unit area (density of pixels ejecting ink, etc.) is increased. As a result, the portion on which the image 5A is formed is wetted well, while the portion other than the image 5 is poorly wetted. Therefore, a figure having a reverse wetting relationship to that in FIG. ) Can be expressed. Even in such a modification, the appearance can be renewed and high design can be obtained.

(Modification 4)
The medium for forming an image having gradation may be a medium that does not have water absorption, such as a synthetic resin sheet. In this case, the ink (ink that improves the liquid absorption rate) containing the material of the liquid absorption layer (material that improves the liquid absorption rate) that absorbs the liquid is applied (applied) to the medium by an inkjet method or the like. Alternatively, a liquid absorption layer may be formed (printed) and an image may be represented by the liquid absorption layer. The material of the liquid absorption layer is also an example of a material that changes the liquid absorption rate of the medium. As the liquid absorbing layer and its material, for example, a known ink receiving layer and its material can be used.

  A printed matter 100 of such a modification is shown in FIG. An image 105 is provided on the synthetic resin sheet 103. The image 105 is formed by a liquid absorption layer. The image 105 includes images 105A to 105D. In addition, although the sheet | seat 103 also contains the area | region in which the image 105A-105D is formed, in FIG. 4, the code | symbol 103 is attached | subjected to the part (part which the sheet | seat 103 is exposed) in which the liquid absorption layer is not provided, A sheet 103 is shown. In the images 105A to 105D, the amount of the material constituting the liquid absorption layer per unit area (for example, the density of the pixels that eject ink) is different, and each portion provided with the images 105A to 105D has a liquid absorption rate. Different. Specifically, in the order of image 105A> image 105B> image 105C> image 105D, the amount per unit area of the material constituting the liquid absorption layer (the density of pixels that eject ink containing the material, etc.) increases. The liquid absorption rate is high. As in the third modification, the magnitude relationship of the amount per unit area of the material constituting the liquid absorption layer may be reversed.

  The medium may have liquid absorbency, or a material that improves liquid absorbability may be applied to the medium to form the image 105 or the like.

  As described above, by using a material or ink that improves the liquid absorptance and applying the material or ink to the fabric 3, a new printed matter can be obtained. Similarly to the above, by varying the amount of the water repellent per unit area or the amount of ink applied per unit area of the ink depending on the location, an image having gradation can be expressed, and a printed matter with high design can be obtained.

(Modification 5)
There may be at least two portions having different water absorption rates. If there are at least two portions having different water absorption rates, the image does not become monotonous and the appearance can be renewed. Further, the step of changing the amount or absorption rate per unit area of the water repellent (gradation change step) is 3 steps or more, preferably 5 steps or more, more preferably 10 steps or more. By increasing the number of steps and finely changing the gradation, the design of the image is further improved.

(Modification 6)
The material that changes the liquid absorption rate, such as a water repellent, or the ink that changes the liquid absorption rate is not transparent and may have the same color as the medium such as the fabric 3.

(Modification 7)
A medium such as a fabric 3 (cloth 3 coated with ink or the like) on which a material that changes the liquid absorption rate such as a water repellent is fixed is contacted (preferably immersed) with a colored liquid (preferably a dye liquid). And may be colored. The coloring is performed by, for example, a conventional coloring method (especially a dyeing method) such as plant dyeing. By such coloring, the liquid absorption rate is changed in the region where the ink is applied, and therefore, an anti-coloring effect or a deep coloring effect is obtained. The anti-coloring effect refers to an effect of lowering the degree of coloring by coloring than when no ink is applied (same coloring conditions are included) (including the case of completely preventing coloring). The deep coloring effect means an effect of increasing the coloring degree by coloring as compared with the case where no ink is applied (the coloring conditions are the same). In the case of dyeing, the anti-coloring effect is also called an anti-dyeing effect, and the deep coloring effect is also called a deep dyeing effect.

  The term “coloration degree” is defined as (i) the density of color in the color of the media after coloring when compared to the color of the media before coloring when the color of the media is visually or mechanically observed. It includes a change amount, (ii) a change amount of a color component excluding lightness, or (iii) a change amount of lightness, hue, and saturation.

“Color density” means the color intensity. When the density of a certain color is visually evaluated, the color density is higher as the color brightness is closer to black, and the color density is lower as the color brightness is closer to white. If mechanically evaluate the density of a color, reflection density or lightness ^{(e.g., L * a * b * L} * values in a color system) can be used as an index. It is particularly preferable to use the reflection density as an index. The reflection density can be measured with a reflection densitometer. The brightness can be measured with a spectrocolorimeter. When evaluating the density of a certain color based on the lightness, the lower the lightness of the color, the higher the color density, and the higher the lightness of the color, the lower the color density. Further, when evaluating the density of a certain color based on the reflection density, the higher the reflection density of the color, the higher the density of the color, and the lower the reflection density of the color, the lower the density of the color.

“A color component excluding lightness” means hue and saturation. When the change amount of the color component excluding the brightness from the color of the media before coloring to the color of the media after coloring is visually evaluated, the color of the media before coloring is a certain color A, and this color A is determined by coloring. Is changed toward color B of another system, it is evaluated that the amount of change is smaller as the color system of the colored medium is closer to color A, and the color system of the colored medium is The closer to B, the greater the amount of change. When mechanically evaluating color components other than lightness, the a ^* value and b ^* value in the L ^* a ^* b ^* color system can be used as indices. The a ^* value and b ^* value can be measured with a spectrocolorimeter. If the change amount of the color components excluding the brightness of the medium color after coloring the color of the media before coloring is assessed by a ^* and b ^* values, the color of the media due to coloration a ^* value and b ^* value variation .DELTA.a ^* using the numerical value of the square root of both sums of squares from and [Delta] b ^*, and evaluated as the amount significant enough the number, the greater is large, it evaluates the amount of change as the number is less small.

When mechanically evaluating changes in lightness, hue, and saturation, the L ^* value, a ^* value, and b ^* value in the L ^* a ^* b ^* color system can be used as an index. When the amount of change in the color component excluding the brightness from the color of the media before coloring to the color of the media after coloring is evaluated by the L ^* value, a ^* value, and b ^* value, the L ^* value of the media color due to coloring , A ^* value, and b ^* value change amounts ΔL ^* , Δa ^* , and Δb ^* are used as the square root value ΔE ^* ab of these three sums of squares, and the larger the value, the larger the change amount, The smaller the numerical value, the smaller the change amount. In a certain coloring method, when the change in color density caused by the coloring method is small and the change in the color component excluding lightness is large, the change amount of the color component excluding lightness or the change amount of lightness, hue, and saturation is calculated. It is preferable to use it as a coloring degree. In addition, when there is little change in color components excluding lightness caused by the coloring method and there is a large change in color density, the change in color density or the change in brightness, hue, and saturation should be used as the coloring degree. Is preferred.

  According to the above, it is possible to color the area where the ink is applied with a different coloring degree than the area where the ink is not applied. Thereby, a new color can be realized. Further, by providing a region where ink is applied and a region where ink is not applied, the degree of coloring in the two regions can be made different. Furthermore, since the coloring degree can be varied for portions (images 5A to 5D) having different application amounts per unit area of ink, gradation can also be expressed. These can provide a new look with high design.

  In addition, when an image formed with a specific water repellent is colored, either the anti-coloring effect or the deep coloring effect can be selectively obtained according to the temperature and contact time of the coloring liquid to be brought into contact with the medium. This inventor has found. The specific water-repellent agent has, for example, a bond for forming a bond with the surface of the media, and is a linear hydrocarbon moiety having the longest chain length counted from the carbon bonded to the bond. A water repellent containing a substituted or unsubstituted chain hydrocarbon compound having 7 to 100 carbon atoms as an active ingredient, for example, binding to an alkyl group as a water repellent ingredient and a medium such as the fabric 3 An agent having an isocyanate group (of course, this water repellent can also be used in the above embodiment). For example, by increasing the temperature of the coloring liquid (50 degrees, 80 degrees, etc.), a deep coloring effect can be obtained, and by reducing the temperature of the coloring liquid (25 degrees, etc.), an anti-coloring effect can be obtained. If the contact time is also long (10 minutes or the like), a deep coloring effect is obtained, and if the contact time is also short (10 seconds, 1 minute, etc.), the anti-coloring effect is obtained. These naturally vary depending on the material of the coloring liquid and the material of the fabric. With such a configuration, the degree of coloring can be easily controlled.

  DESCRIPTION OF SYMBOLS 1,100 ... Printed matter, 3 ... Fabric, 5,105 ... Image, 5A-5D, 105A-105D ... Image, 10 ... Printer, 11 ... Conveyance mechanism, 12 ... Ink tank, 13 ... ink supply mechanism, 14 ... print head, 15 ... drive mechanism, 16 ... drying device, 17 ... control unit

Claims (8)

An ink application unit that applies ink that changes the liquid absorption rate of the medium to the medium;
A controller that controls the amount of ink applied to the medium by the ink application unit,
Printing is performed so that the liquid absorption rate is different between the first region and the second region where the ink is applied on the medium due to the difference in the amount of application per unit area of the ink controlled by the control unit.
Printer. Printing an image having a gradation in which the liquid absorption rate gradually changes due to a difference in coating amount per unit area of the ink;
The printer according to claim 1. The ink is an ink containing a water repellent,
The ink application unit is a print head that applies the ink to the medium by an inkjet method.
The printer according to claim 1 or 2. The ink is an ink that improves the liquid absorption rate,
The ink application unit is a print head that applies the ink to the medium by an inkjet method.
The printer according to claim 1 or 2. A printing step of printing one or more images by applying ink that changes the liquid absorption rate of the medium to the medium;
In the printing step, the one or more images are arranged so that the liquid absorption rate is different between the first area and the second area where the ink is applied on the medium due to a difference in application amount per unit area of the ink. Print,
Manufacturing method of printed matter. A coloring step of coloring the medium by bringing a coloring liquid into contact with the medium on which the printing has been performed;
The colored media is different in coloring degree between the first area and the second area.
The manufacturing method of the printed matter of Claim 5. A printed matter on which an image is printed with a material that changes the liquid absorption rate,
The first region and the second region have a first region and a second region to which the material is fixed, and the liquid absorption rate is different between the first region and the second region due to a difference in amount per unit area of the material that is fixed.
Printed matter. A printed matter according to claim 7, which is colored,
The first region and the second region have different coloring levels.
Printed matter.

Images