Heat transfer sheet

Abstract

This invention provides a heat transfer sheet, a combination of an image receiving sheet and a heat transfer sheet, a skin-pattern sheet manufacturing system, and a method for manufacturing a skin-pattern sheet, enabling the production of skin-pattern sheets that match the user's skin tone while keeping production costs down. [Solution] The heat transfer sheet of the present disclosure is a heat transfer sheet for printing skin patterns, wherein a set of a receiving layer, a first dye layer, a second dye layer, and a protective layer are formed sequentially on one side of a base sheet, and this set is repeatedly arranged.

Description

[Technical Field]

[0001] This disclosure relates to a thermal transfer sheet, a combination of an image receiving sheet and a thermal transfer sheet, a skin-pattern sheet manufacturing system, and a method for manufacturing a skin-pattern sheet. [Background technology]

[0002] Tattoo stickers and skin-concealing sheets, which are applied to the skin, are well-known examples of skin-patterned designs. Tattoo stickers, printed with various designs, are sold at variety stores, sports and music event venues, amusement parks, etc., and are used to enhance the atmosphere.

[0003] Skin-concealing sheets are sheets that have been pre-colored with a predetermined color using screen printing or other methods on a base material, and are used to conceal skin blemishes, scars, and other discolored areas. Users choose and use a sheet that matches their skin tone. For example, a skin-concealing sheet consists of a release sheet, an adhesive layer, a stretchable base material, and a cover sheet, which are laminated in order. It is applied to the user's skin by peeling off the release sheet, attaching the adhesive layer to the skin, and then peeling off the cover sheet.

[0004] Users select a skin-concealing sheet from several available colors that closely matches their natural skin tone. However, the available colors are limited, and users sometimes become dissatisfied due to the noticeable color difference between the sheet and their natural skin.

[0005] One possible approach is to create a skin-concealing sheet by on-demand printing a color that matches the user's skin tone. For printing, a sublimation-type thermal transfer printer with excellent color reproduction and gradation is preferable. Since a thermal transfer printer heats a thermal transfer sheet and transfers dye to form an image, it is necessary to provide a receptive layer on the skin-concealing sheet to receive the dye. When a receptive layer is provided on a stretchable substrate in advance, there was a risk that the stretchable substrate would melt, break, or deform due to the solvent contained in the coating liquid for the receptive layer during the process of applying and drying the coating liquid on the stretchable substrate. Therefore, it is preferable to transfer the receptive layer onto the stretchable substrate by thermal transfer, and the thermal transfer sheet is configured with at least five panels as a set, including a receptive layer panel, a yellow dye layer panel, a magenta dye layer panel, a cyan dye layer panel, and a protective layer panel, and this set is repeated.

[0006] Since one set of heat transfer sheets is used to produce one skin-concealing sheet, the more panels that make up a set, the slower the production speed of the skin-concealing sheets becomes, and the fewer skin-concealing sheets can be produced from a single heat transfer sheet, resulting in increased production costs. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2009-100851 [Overview of the project] [Problems that the invention aims to solve]

[0008] The object of this disclosure is to provide a heat transfer sheet, a combination of an image receiving sheet and a heat transfer sheet, a skin-pattern sheet manufacturing system, and a method for manufacturing a skin-pattern sheet that can be manufactured at a reduced production cost, matching the skin tone of the user. [Means for solving the problem]

[0009] The heat transfer sheet of this disclosure is a heat transfer sheet for printing skin textures, wherein a set of a receiving layer, a first dye layer, a second dye layer, and a protective layer are formed sequentially on one side of a base sheet, and this set is repeatedly arranged.

[0010] The combination of the image receiving sheet and the thermal transfer sheet of this disclosure comprises an image receiving sheet in which a release sheet, an adhesive layer, and an expandable sheet are laminated in that order, and the thermal transfer sheet.

[0011] The skin-pattern sheet manufacturing system of the present disclosure comprises: an imaging device that photographs the user's skin including a discolored area and generates an image; an analysis unit that analyzes the hue of the discolored area from the image; a skin-pattern sheet data generation unit that generates data for a skin-pattern sheet that conceals the discolored area using the analysis results of the analysis unit; and a printer that, based on the skin-pattern sheet data, transfers dye from a thermal transfer sheet to a receiving layer to form an image, and produces a skin-pattern sheet including the receiving layer on which the image has been formed. The printer heats the thermal transfer sheet, transfers the receiving layer onto the stretchable sheet of an image receiving sheet in which a release sheet, an adhesive layer, and a stretchable sheet are laminated in that order, transfers dye from the first dye layer and the second dye layer onto the transferred receiving layer to form the image, and transfers the protective layer onto the receiving layer on which the image has been formed to produce the skin-pattern sheet.

[0012] The manufacturing method of the skin design sheet of the present disclosure includes a step of using a photographing device to photograph the skin of a user including a discolored part and generating a photographed image; a step of using an arithmetic control device to analyze the hue of the discolored part from the photographed image and generating data of a skin design sheet that conceals the discolored part based on the analysis result; and a step of using a printer to transfer a dye from a thermal transfer sheet to a receiving layer based on the data of the skin design sheet to form an image, and manufacturing a skin design sheet including the receiving layer on which the image is formed. The printer heats the thermal transfer sheet, transfers the receiving layer onto the stretchable sheet of a receiving sheet in which a release sheet, an adhesive layer, and a stretchable sheet are laminated in this order, transfers dyes from the first dye layer and the second dye layer to the transferred receiving layer to form the image, and transfers the protective layer onto the receiving layer on which the image is formed to manufacture the skin design sheet.

Advantages of the Invention

[0013] According to the present disclosure, a skin design sheet matching the color tone of the user's natural skin can be manufactured while suppressing production costs.

Brief Description of the Drawings

[0014] [Figure 1] It is a schematic configuration diagram of a skin design sheet manufacturing system according to an embodiment of the present disclosure. [Figure 2] It is a functional block diagram of an arithmetic control device. [Figure 3] FIG. 3a is a diagram showing a photographed image, FIG. 3b is a diagram showing a skin design sheet image, and FIG. 3c is a diagram showing a simulation image. [Figure 4] It is a schematic configuration diagram of a printer. [Figure 5] It is a plan view of a thermal transfer sheet. [Figure 6] It is a cross-sectional view of a receiving sheet. [Figure 7] FIGS. 7a to 7c are process cross-sectional views for explaining the manufacturing method of the skin design sheet. [Figure 8] It is a diagram showing a usage example of the skin design sheet. [Figure 9]It is a plan view of a thermal transfer sheet. [Figure 10] Figs. 10a to 10c are process cross-sectional views for explaining a method of manufacturing a skin design sheet. [Figure 11] It is a view showing an example of use of the skin design sheet. [Figure 12] It is a schematic configuration diagram of a printer. [Figure 13] It is a plan view of a thermal transfer sheet. [Figure 14] It is a cross-sectional view of an intermediate transfer medium. [Figure 15] It is a cross-sectional view of an intermediate transfer medium. [[ID=二十]] [Figure 16] It is a cross-sectional view of the skin design sheet. [Figure 17] It is a view showing an example of use of the skin design sheet. [Figure 18] It is a schematic configuration diagram of a printer. [Figure 19] It is a cross-sectional view of a cover sheet. [Figure 20] It is a cross-sectional view of the skin design sheet. [Figure 21] It is a plan view of a thermal transfer sheet. [Figure 22] It is a plan view of a thermal transfer sheet. [Figure 23] It is a plan view of a thermal transfer sheet.

Embodiments for Carrying Out the Invention

[0015] Fig. 1 is a schematic configuration diagram of a skin design sheet manufacturing system according to an embodiment of the present disclosure. As shown in Fig. 1, the skin design sheet manufacturing system includes a photographing device 1, an arithmetic control device 2, a display device 3, and a printer 4, and manufactures a skin design sheet 5 that conceals discolored parts such as moles and scars by being attached to the skin of user P. The skin design sheet 5 includes a concealment part (high light transmittance density part) that is located directly above the discolored part when attached to the skin of user P and conceals the discolored part, and a peripheral part that surrounds the concealment part and reduces the color difference from the user's natural skin to make the skin design sheet less conspicuous.

[0016] The imaging device 1 can use a digital camera or the like, and takes a photograph of user P. In addition to the imaging device, the imaging device 1 includes equipment such as lighting equipment and background equipment to appropriately capture user P's skin tone. The imaging device 1 may also be something like a photo booth for ID photos. In the following embodiment, the imaging device 1 will be described as taking a photograph of user P's face. If the user has already applied makeup to their skin, the skin in the captured facial image will refer to the skin with makeup applied. The imaging device 1 transmits user P's facial image to the arithmetic control device 2.

[0017] The arithmetic control unit 2 is, for example, a computer having a CPU and memory. The CPU executes the textured sheet manufacturing program stored in memory, thereby realizing the functions of the image receiving unit 201, analysis unit 202, textured sheet data generation unit 203, textured sheet image generation unit 204, simulation image generation unit 205, display processing unit 206, and print control unit 207, as shown in Figure 2. Instead of storing all programs in the CPU and memory for each system, the CPUs of the server and each system may be linked via a network to execute the programs, and the server may manage the registration of data such as user P information, captured images, and output images.

[0018] Furthermore, the memory unit 200 of the arithmetic control unit 2 stores a hue table that defines the correspondence between the transfer density ratio of the yellow dye contained in the yellow dye layer 12 and the magenta dye contained in the magenta dye layer 13, which are provided on the thermal transfer sheet 10 used in the printer 4 described later, and the resulting color (mixed color). The transfer density ratio may also be the heating energy of the yellow dye layer 12 and the magenta dye layer 13, respectively.

[0019] Skin tones can be created by mixing yellow and magenta, and different hues of skin tones can be expressed by changing the transfer concentration ratio of yellow and magenta dyes. For example, as shown in Table 1, there are multiple types of skin tones with different hues, and the transfer concentration ratio of yellow and magenta dyes corresponding to each hue is measured in advance and defined in a hue table.

[0020] [Table 1]

[0021] The image receiving unit 201 of the arithmetic control device 2 receives a facial image of user P from the imaging device 1.

[0022] The analysis unit 202 analyzes the facial image to identify discolored areas such as blemishes and scars, and calculates the location, shape, and dimensions of the discolored areas. The analysis unit 22 also analyzes the hue of the skin (excluding the discolored areas) and the hue of the discolored areas.

[0023] The skin texture sheet data generation unit 203 generates skin texture sheet data (design data) suitable for concealing discolored areas based on analysis results such as the location, shape, and dimensions of the discolored areas and the hue of the base surface and discolored areas. The skin texture sheet data includes, for example, the color, shape, and dimensions of the concealed area, and the color of the surrounding area. The color of the surrounding area may include a gradient (density gradation). The concealed area and the surrounding area may have different colors, or they may be the same color with the concealed area having a higher light transmission density. The colors of the concealed area and the surrounding area may be determined considering trends and the age of the user P.

[0024] Furthermore, the skin texture sheet data generation unit 203 refers to the hue table stored in the memory unit 200 and determines the transfer density ratios of yellow dye and magenta dye to represent the colors of the concealed area and the surrounding area. For example, it extracts from the hue table the transfer density ratio of the skin tone closest to the color of the concealed area and the transfer density ratio of the skin tone closest to the color of the surrounding area. The skin texture sheet data includes the transfer density ratios of yellow dye and magenta dye.

[0025] The skin texture sheet data generation unit 203 normally sets the concealed area to be located in the center of the skin texture sheet. However, if the concealed area is close to the nose or eyes, applying a skin texture sheet with the concealed area in the center will cause the sheet to cover the nose or eyes. Therefore, the skin texture sheet generation unit 203 adjusts the size of the skin texture sheet and the position of the concealed area on the sheet based on the positional relationship between the discolored area and the nose or eyes. The skin texture sheet data includes information such as the sheet size and the position of the concealed area on the sheet.

[0026] The skin texture sheet image generation unit 204 generates an image of the skin texture sheet to be manufactured based on the data of the skin texture sheet.

[0027] The simulation image generation unit 205 generates a simulation image of what it would look like if a skin-pattern sheet based on the skin-pattern sheet data were applied to the user P's face. For example, it generates a simulation image by compositing an image of the skin-pattern sheet onto the user P's face image based on the location of the discolored areas.

[0028] The display processing unit 206 displays the user P's face image, the skin pattern sheet image, and the simulation image on the display device 3. For example, the user P's face image as shown in Figure 3a, the skin pattern sheet 5 image as shown in Figure 3b, and the simulation image as shown in Figure 3c are displayed on the display device 3. When user P confirms the simulation image displayed on the display device 3 in which the discolored area S on the face is concealed, they operate an operation unit (not shown) to instruct the start of skin pattern sheet production.

[0029] User P may be able to adjust the color and density of the skin texture sheet, the position and size of the concealed areas, etc., by operating the control panel while viewing the simulation image. The adjustment results will be reflected in the data of the skin texture sheet.

[0030] When the print control unit 207 receives an instruction to start production, it transfers the textured sheet data to the printer 4. The printer 4 performs the printing process based on the textured sheet data and outputs the textured sheet 5.

[0031] Figure 4 is a schematic diagram of the printer 4, Figure 5 is a plan view of the thermal transfer sheet 10 used in the printer 4, and Figure 6 is a cross-sectional view of the image receiving sheet 20 used in the printer 4.

[0032] The thermal transfer sheet 10 is wound around the supply unit 33, unwound from the supply unit 33, passes through the thermal head 31, and is wound up and collected in the recovery unit 34.

[0033] The thermal transfer sheet 10 consists of a long, strip-shaped base sheet (not shown) on one side, with four panels (regions) formed sequentially from the recovery section 34 side: a transfer-type receiving layer 11, a yellow dye layer 12, a magenta dye layer 13, and a protective layer 15. These sets are repeated. The receiving layer 11 is a transparent layer that receives the dye migrated from the thermal transfer sheet 10. The yellow dye layer 12 and the magenta dye layer 13 contain a binder resin and a sublimable dye. Known materials can be used for the receiving layer 11.

[0034] The sublimation dye contained in the yellow dye layer 12 is not particularly limited and can be appropriately selected from conventionally known sublimation dyes, but styryl dyes are preferred. The sublimation dye contained in the magenta dye layer 13 is not particularly limited and can be appropriately selected from conventionally known sublimation dyes, but azo dyes are preferred.

[0035] A transparent resin material can be used for the protective layer 15. Furthermore, the protective layer 15 is preferably matte in appearance with low surface reflectivity to suppress glossiness when applied to the skin. Here, "matte" refers to a gloss level of 40% or less. The gloss level is measured using a gloss meter at an incident angle of 45°.

[0036] The image receiving sheet 20 is unwound from the image receiving sheet roll 35 on which the image receiving sheet 20 is wound. The image receiving sheet roll 35 is attached to a winding shaft component (not shown), and when the winding shaft component is rotated (forward / reverse), the image receiving sheet roll 35 rotates, causing the image receiving sheet 20 to be unwound or wound up.

[0037] The image receiving sheet 20 has a release sheet 21, an adhesive layer 22, and an elastic sheet 23, which are laminated in order. The release sheet 21 can be a known release paper that has been treated with silicone release treatment or the like. The adhesive used in the adhesive layer 22 is preferably a urethane-based or acrylic-based adhesive that is less likely to cause skin irritation or inflammation. In addition, a gel-type adhesive is preferable in order to ensure adhesion to the skin.

[0038] The stretchable sheet 23 can be made of, for example, a urethane film. The stretchable sheet 23 preferably has an elongation rate of about 30% to 100%, and more preferably about 60%, in order to follow the stretching and contracting of the skin when it is applied.

[0039] The elongation rate of the stretchable sheet is the elongation rate obtained by the test method compliant with JIS-K-7127 (1999). The elongation rate can be calculated using the following formula (1). In formula (1), L is the length at which the stretchable sheet is cut (broken) when pulled at a speed of 200 mm / min using a tensile testing machine. L0 is the length before being pulled by the tensile testing machine. A tensile testing machine such as a Tensilon universal material tester can be used. Growth rate (%) = 100 × (L - L0) / L0 ... (1)

[0040] The stretchable sheet 23 allows water vapor from sweat on the skin to pass through, with a density of 1000 g / m². 2 It is preferable that the moisture permeability is 24hr or higher.

[0041] Furthermore, the stretchable sheet 23 is preferably 5 μm or thicker in order to prevent wrinkles from forming during application and to improve workability. In addition, the thickness of the stretchable sheet 23 is preferably 30 μm or less in order to minimize discomfort during application.

[0042] In the printer 4, a rotatable platen roll 32 is provided on the side opposite the thermal head 31, with the thermal transfer sheet 10 in between. The thermal head 31 and the platen roll 32 sandwich the image receiving sheet 20 and the thermal transfer sheet 10, and heat the thermal transfer sheet 10.

[0043] First, the thermal head 31 heats the transfer-type receiving layer 11 and transfers it onto the stretchable sheet 23 of the image receiving sheet 20, as shown in Figure 7a. Next, based on the transfer density ratio included in the data of the skin pattern sheet, the yellow dye layer 12 and the magenta dye layer 13 are heated in sequence to transfer the dye to the receiving layer 11 on the image receiving sheet 20, forming the skin pattern sheet image G, as shown in Figure 7b. The skin pattern sheet image G includes the concealed area and the peripheral area.

[0044] Next, the protective layer 15 of the heat transfer sheet 10 is heated and transferred onto the skin texture sheet image G, as shown in Figure 7c. The image receiving sheet 20, on which the image has been formed and the protective layer has been transferred, is cut by a cutter 38 (see Figure 4) located downstream, based on the data of the skin texture sheet, to produce the skin texture sheet 5.

[0045] As shown in Figure 8, user P peels off the release sheet 21 of the fabricated skin-pattern sheet 5, aligns it so that the concealing portion covers the discolored portion S of the skin, and attaches the skin-pattern sheet 5 to the skin using the adhesive layer 22. If user P's information is registered on the server, a composite image of user P's face image and the skin-pattern sheet may be sent and displayed to user P's personal computer, smartphone, or other user terminal so that the user can confirm the placement of the skin-pattern sheet. The composite image may be displayed on the display device 3 to prompt immediate attachment, or the composite image may be printed on photographic paper and output.

[0046] Thus, according to this embodiment, since the skin-patterned sheet 5 is manufactured on demand from a captured image of user P, the position, size, and shape of the concealed area of ​​the skin-patterned sheet 5 correspond to the position, size, and shape of the discolored area of ​​the skin, and the color of the surrounding area of ​​the skin-patterned sheet 5 matches the color of user P's natural skin. As a result, any discomfort when the skin-patterned sheet 5 is applied to the skin is suppressed, and a natural finish is achieved.

[0047] Furthermore, by adjusting the position of the concealing portion of the skin-like design sheet 5, it is possible to prevent the skin-like design sheet 5 from coming into contact with the eyes, nose, etc., when the concealing portion is aligned with the discolored area of ​​the skin and applied to the sheet.

[0048] Furthermore, the thermal transfer sheet 10 consists of a set of four panels (regions) formed sequentially face-to-face: a receiving layer 11, a yellow dye layer 12, a magenta dye layer 13, and a protective layer 15. Because the cyan dye layer panel is omitted, the number of panels constituting one set is smaller compared to conventional thermal transfer sheets, which allows for faster production of textured sheets and increases the number of textured sheets that can be produced from a single thermal transfer sheet, thereby reducing production costs.

[0049] In the above embodiment, the transfer-type receiving layer 11 provided on the thermal transfer sheet 10 used in the printer 4 may have a white receiving layer 11A and a transparent receiving layer 11B, as shown in Figure 9. The white receiving layer 11A is formed by laminating a primer layer containing a white pigment such as titanium dioxide with a transparent receiving layer.

[0050] As shown in Figure 10a, the white receiving layer 11A is transferred to the area on the image receiving sheet 20 where the concealed portion is to be formed. The transparent receiving layer 11B is transferred to the area other than the concealed portion, i.e., the area where the peripheral portion is to be formed.

[0051] As shown in Figure 10b, dye is transferred from the heat transfer sheet 10 to the white receiving layer 11A and the transparent receiving layer 11B to form the skin texture sheet image G. The image of the concealed area is formed on the white receiving layer 11A. The image of the peripheral area is formed on the transparent receiving layer 11B. Then, as shown in Figure 10c, the protective layer 15 is transferred to cover the skin texture sheet image G to produce the skin texture sheet 5.

[0052] As shown in Figure 11, the release sheet 21 of the fabricated skin-pattern sheet 5 is peeled off, and the skin-pattern sheet 5 is positioned so that the concealing portion formed on the white receiving layer 11A covers the discolored area S of the skin, and then attached to the skin using the adhesive layer 22. By using the white receiving layer 11A, reflected light from the discolored area S is suppressed, the concealment of the discolored area S is enhanced, and the reproduction of the desired skin color can be improved. Since a transparent receiving layer 11B is used in the peripheral area, the transparency of the skin color is high, and the color difference between the skin-pattern sheet 5 and the surrounding skin can be suppressed.

[0053] The transparent receiving layer may contain particles that scatter light.

[0054] Figure 12 is a schematic diagram of a printer 4 according to another embodiment. Figure 13 is a plan view of the thermal transfer sheet 40 used in this printer 4, and Figure 14 is a cross-sectional view of the intermediate transfer medium 50.

[0055] In the thermal transfer sheet 40, two panels (regions), a yellow dye layer 42 and a magenta dye layer 43, are formed sequentially on each surface, forming a set, and this set is repeatedly arranged. The thermal transfer sheet 10 is wound around the supply unit 63, unwound from the supply unit 63, passes through the thermal head 61, and is wound up and collected in the recovery unit 64.

[0056] The intermediate transfer medium 50 has a cover sheet 51, a protective layer 52, and a receiving layer 53 that are laminated in order. The cover sheet 51 has a base material 51a and a release layer 51b provided on the base material 51a, with the release layer 51b in contact with the protective layer 52. The protective layer 52 and the receiving layer 53 can be the same as those used for the protective layer 15 and the receiving layer 11 described above.

[0057] As the base material 51a, a plastic base material such as polyethylene terephthalate can be used. The release layer 51b improves the peelability of the cover sheet 51 from the protective layer 52, and a release component such as wax can be used.

[0058] The thermal head 61 and platen roll 62 sandwich the intermediate transfer medium 50 and the heat transfer sheet 40, and the thermal head 61 sequentially heats the yellow dye layer 42 and the magenta dye layer 43 based on the transfer density ratio of the skin pattern sheet data, and transfers the dye to the receiving layer 53 of the intermediate transfer medium 50 to form the skin pattern sheet image G, as shown in Figure 15.

[0059] The intermediate transfer medium 50 on which the skin-pattern sheet image G is formed is superimposed on the image receiving sheet 20 unwound from the image receiving sheet roll 66 and transported to the heat roller 67. As shown in Figure 16, the image receiving sheet 20 and the intermediate transfer medium 50, which are superimposed so that the stretchable sheet 23 of the image receiving sheet 20 and the receiving layer 53 of the intermediate transfer medium 50 face each other, are compressed and heated by the heat roller 67 to become one. After that, the integrated image receiving sheet 20 and intermediate transfer medium 50 are cut by a cutter 68 to produce a skin-pattern sheet 5A with a cover sheet.

[0060] As shown in Figure 17, user P peels off the release sheet 21 of the fabricated skin-like design sheet 5A, aligns it so that the concealing portion covers the discolored area S of the skin, and attaches the skin-like design sheet 5A to the skin using the adhesive layer 22. After that, the cover sheet 51 is peeled off.

[0061] Thus, a skin-pattern sheet 5A can be produced even when using the intermediate transfer medium 50.

[0062] In the printer 4 shown in Figure 4, the receiving layer 11 is transferred onto the stretchable sheet 23 of the image receiving sheet 20, a skin texture sheet image G is formed on the receiving layer 11, a protective layer 15 is transferred onto the skin texture sheet image G, and then it is cut with a cutter. However, as shown in Figure 18, after the transfer of the protective layer 15, the cover sheet 51 unwound from the cover sheet roll 69 and the image receiving sheet 20 may be pressed and heated together with a heat roller 67 to integrate them, and then cut with a cutter 68 to produce a skin texture sheet 5B with a cover sheet.

[0063] Figure 19 is a cross-sectional view of the cover sheet 51 being unwound from the cover sheet roll 69. Figure 20 is a cross-sectional view of the textured sheet 5B with the cover sheet attached.

[0064] In the above embodiment, an example was described in which a skin-pattern sheet image matching the user's skin tone is formed using yellow dye and magenta dye. However, as shown in Figure 21, instead of the yellow dye layer and magenta dye layer, a heat transfer sheet 10A comprising a skin-color layer 16 containing yellow dye and magenta dye, and a brightness adjustment layer 17 for adjusting the brightness of the skin color may be used to form the skin-pattern sheet image. The skin-color layer 16 contains, for example, yellow dye and magenta dye so that any of the multiple skin tones shown in Table 1 can be represented.

[0065] The yellow dye contained in the skin-color layer 16 is a * ga -24~-5, b * This refers to dyes 9 to 100, and the magenta dye (Mg) contained in the skin tone layer 16 is a * 11-81, b * This refers to dyes with a color of -13 to 13. Skin tone layer 16 is L * Yellow dye (Ye) with a value of 92-96, and L * It is preferable to include magenta dye (Mg) with a value of 44 to 92 in a mixing ratio of Ye:Mg = 0.5 to 0.6:0.4 to 0.5 (where Ye + Mg = 1).

[0066] In the thermal transfer sheet 10A, four panels (regions) consisting of a receiving layer 11, a skin-color layer 16, a brightness adjustment layer 17, and a protective layer 15 are formed sequentially on one side of the base sheet (not shown), and these sets are repeatedly arranged.

[0067] The brightness adjustment layer 17 is, for example, a layer containing a gray dye. This gray dye is L * This dye can reduce the hue by 15 or more. In this case, the hue table of the memory unit 200 of the arithmetic control device 2 defines the transfer density ratio of the skin tone layer 16 and the lightness adjustment layer 17 corresponding to the hue of each of the multiple types of skin tones. Based on the transfer density ratio defined in the hue table, a skin tone dye (a dye mixed with yellow dye and magenta dye) is transferred from the skin tone layer 16 to the receiving layer, and a gray dye is transferred from the lightness adjustment layer 17 to the receiving layer, thereby forming a skin design sheet image that expresses the desired skin tone.

[0068] The brightness adjustment layer 17 may contain black pigment instead of gray dye. The brightness of the skin tone can be adjusted by adjusting the density or size of the fine halftone dots of the black pigment transferred from the brightness adjustment layer 17.

[0069] The brightness adjustment layer 17 may contain a dark skin-colored dye instead of a gray dye, i.e., a skin-colored layer with low brightness.

[0070] It is more preferable that the low-brightness skin tone layer contains cyan dye (Cy). In this case, the hue table of the storage unit 200 of the arithmetic control device 2 defines the transfer density ratio of the skin tone layer 16 (high-brightness skin tone) and the brightness adjustment layer 17 (low-brightness skin tone) corresponding to the respective hues and brightness of multiple types of skin tones. Based on the transfer density ratio defined in the hue table, a skin tone dye (a dye mixed with yellow dye (Ye) and magenta dye (Mg)) is transferred from the skin tone layer 16 to the receiving layer, and a low-brightness skin tone dye (a dye mixed with yellow dye (Ye), magenta dye (Mg), and cyan dye (Cy)) is transferred from the brightness adjustment layer 17 to the receiving layer, thereby forming a skin design sheet image that expresses a desired skin tone.

[0071] Here, the yellow dye (Ye) contained in the lightness adjustment layer (the light skin color layer with low lightness) means a dye where a * is -24 to -5 and b * is 9 to 100. The magenta dye (Mg) contained in the lightness adjustment layer means a dye where a * is 11 to 81 and b * is -13 to 13. The cyan dye (Cy) contained in the lightness adjustment layer means a dye where a * is -23 to -1 and b * is -42 to -5. The lightness adjustment layer preferably contains a yellow dye (Ye) with an L * value of 92 to 96, a magenta dye (Mg) with an L * value of 44 to 92, and a cyan dye (Cy) with an L * value of 54 to 95, with a mixing ratio of Ye:Mg = 0.3 to 0.4:0.28 to 0.32 (where Ye + Mg + Cy = 1).

[0072] As shown in FIG. 22, the receiving layer 11 of the thermal transfer sheet 10A may have a white receiving layer 11A and a transparent receiving layer 11B.

[0073] In the printer 4 shown in FIG. 12, instead of the thermal transfer sheet 40, a thermal transfer sheet 40A may be used, in which two panels (regions), namely a skin color layer 46 and a lightness adjustment layer 47, are formed in a surface sequential manner as shown in FIG. 23, and this set of two is repeatedly arranged. The skin color layer 46 and the lightness adjustment layer 47 are the same as the above-described skin color layer 16 and lightness adjustment layer 17.

[0074] In the above embodiment, the protective layers 15 and 52 may contain an antibacterial agent containing catechin, copper, silver, titanium, etc.

[0075] In the above embodiment, an example of peeling off the release sheet 21 and attaching the skin design sheet 5 to the skin using the adhesive layer 22 has been described. However, any configuration in which the skin design sheet 5 is attached to the skin may be used. For example, the adhesive layer 22 may be made of a material that exhibits adhesiveness when wetted with water. In this case, instead of the release sheet 21, a water-soluble sheet may be provided.

[0076] In the above embodiment, an example was described in which the analysis unit 202 analyzes the hue of the discolored area and the base skin and calculates the position, shape, dimensions, etc. of the discolored area. However, the analysis unit 202 only needs to analyze the hue of the discolored area and the base skin. From the hue analysis results, a skin-like design sheet suitable for concealing the discolored area can be manufactured. In this case, the user cuts the skin-like design sheet as needed for use. By further calculating the dimensions and / or shape of the discolored area, the analysis unit 22 ensures that the size and shape of the concealed area of ​​the manufactured skin-like design sheet correspond to the size and shape of the discolored area on the skin, resulting in a skin-like design sheet that is easy for the user to use. By further calculating the position of the discolored area, the analysis unit 202 adjusts the position of the concealed area on the skin-like design sheet, making it possible to manufacture a skin-like design sheet that suppresses contact with the eyes, nose, etc.

[0077] In the above embodiment, the area photographed by the imaging device 1 may be other than the face.

[0078] In the above embodiment, an example was described in which the shooting device 1 photographs user P and generates a face image. However, user P may prepare face image data in advance and store it in a portable storage medium such as a smartphone or USB memory, and then input the face image data to the arithmetic control device 2.

[0079] Although this disclosure has been described in detail using specific embodiments, it will be apparent to those skilled in the art that various modifications are possible without deviating from the intent and scope of this disclosure. [Explanation of Symbols]

[0080] 1. Imaging device 2. Arithmetic control unit 3 Display device 4 Printers 10, 40 Heat Transfer Sheets 11 Receptive layer 12 Yellow dye layer 13. Magenta dye layer 15 Protective layer 16 Skin Tone Layer 17 Brightness adjustment layer 20 Image receiving sheet 50 Intermediate transfer medium 200 storage units 201 Image Receiving Unit 202 Analysis Department 203 Skin Pattern Sheet Data Generation Unit 204 Skin pattern sheet image generation unit 205 Simulation Image Generation Unit 206 Display Processing Unit 207 Print Control Unit

Claims

1. A heat transfer sheet for printing skin textures, A thermal transfer sheet having a white receiving layer and a transparent receiving layer formed on one side of the base sheet, configured such that the white receiving layer is transferred to the area where the concealed portion is to be formed, and the transparent receiving layer is transferred to the area where the peripheral portion is to be formed.

2. The thermal transfer sheet according to claim 1, wherein the transparent receiving layer contains particles.

3. A heat transfer sheet for manufacturing skin-patterned sheets, A thermal transfer sheet having a white receiving layer and a transparent receiving layer formed on one side of the base sheet, configured such that the white receiving layer is transferred to the area where the concealed portion is to be formed, and the transparent receiving layer is transferred to the area where the peripheral portion is to be formed.

Images