Thermal transfer recording medium, transferred film, and method for manufacturing the transferred film

Abstract

To provide a thermal transfer recording medium that allows for adjusting the color of a first ink layer, seen through a second ink layer, closer to the ideal color, and to provide a transferred film and its manufacturing method.SOLUTION: A transferred tape 55 has a first ink layer 36, a second ink layer 37 with translucency sufficient to render the first ink layer 36 observable, and a transparent printer tape 2, which are laminated in the stated order. The second ink layer 37 has a complementary-color relationship with the first ink layer 36.SELECTED DRAWING: Figure 5A

Description

[Technical Field] 【0001】 This disclosure relates to a thermal transfer recording medium, a transferred film, and a method for manufacturing the same. [Background technology] 【0002】 Patent Document 1 discloses a thermal transfer material characterized in that at least a first ink layer and a second ink layer are sequentially provided on a support from the support side, and the first ink layer contains a coloring agent whose color tone is complementary to the color tone of the second ink layer. [Prior art documents] [Patent Documents] 【0003】 [Patent Document 1] Japanese Patent Application Laid-Open No. 63-153186 [Overview of the Initiative] [Problems that the invention aims to solve] 【0004】 One embodiment of the present disclosure provides a thermal transfer recording medium, a transferred film, and a method for manufacturing the same, which enable the color of the first ink layer visible through the second ink layer to be brought closer to an ideal color, even when the second ink layer is the surface-side ink layer (observation-side ink layer), in a transferred film in which a transfer pattern including a laminate of a first ink layer and a second ink layer is visible through a transparent film. [Means for solving the problem] 【0005】 A thermal transfer recording medium according to one embodiment of the present disclosure is a thermal transfer recording medium transferred onto a transparent film, comprising a substrate layer and a first ink layer and a second ink layer sequentially laminated on the substrate layer, wherein the second ink layer is translucent enough to allow the first ink layer to be seen and has a complementary color relationship with respect to the first ink layer. [Effects of the Invention] 【0006】 According to a thermal transfer recording medium according to one embodiment of the present disclosure, the second ink layer has light-transmitting properties that allow the first ink layer to be seen. This makes it possible to form a film in which the laminate of the first ink layer and the second ink layer is transferred onto a transparent film such that the second ink layer becomes the surface-side ink layer (observation-side ink layer). Since the second ink layer has light-transmitting properties that allow the first ink layer to be seen, the color of the first ink layer can be recognized through the second ink layer in this transferred film. Furthermore, the second ink layer has a complementary color relationship with the first ink layer. Therefore, even when the first ink layer is covered with the second ink layer, the color of the first ink layer seen through the second ink layer can be made closer to the ideal color. [Brief explanation of the drawing] 【0007】 [Figure 1] Figure 1 is a schematic diagram showing the structure of a printing apparatus according to one embodiment of the present disclosure. [Figure 2] Figure 2 is a block diagram showing the electrical configuration of the printing apparatus. [Figure 3] Figure 3 is a schematic diagram illustrating the heating and cooling processes of the printing apparatus. [Figure 4] Figures 4A and 4B are schematic diagrams illustrating the cooling process and transfer process of the printing apparatus. [Figure 5A] Figure 5A is a schematic cross-sectional view showing the layer structure of a transferred tape according to one embodiment of the present disclosure. [Figure 5B] Figure 5B is a schematic cross-sectional view showing the layer structure of a transferred tape according to one embodiment of the present disclosure. [Figure 5C] Figure 5C is a schematic cross-sectional view showing the layer structure of a transferred tape according to one embodiment of the present disclosure. [Figure 5D] Figure 5D is a schematic cross-sectional view showing the layer structure of a transferred tape according to one embodiment of the present disclosure. [Figure 6] Figures 6A and 6B show examples of print patterns produced by the printing device. 【Best Mode for Carrying Out the Invention】 【0008】 Next, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. [Overall Configuration of Printing Device 1] FIG. 1 is a diagram schematically showing the structure of a printing device 1 according to an embodiment of the present disclosure. 【0009】 Referring to FIG. 1, the printing device 1 is a thermal transfer type thermal printer that thermally transfers the ink of an ink ribbon 3, which is an example of a thermal transfer recording medium, as characters onto a printer tape 2, which is an example of a printing medium. In this embodiment, the printer tape 2 is, for example, a transparent base film onto which the ink is directly transferred. Here, the printer tape 2 being "transparent" may be defined as having a transparency such that the shape and color of the characters transferred onto the printer tape 2 can be recognized from the side opposite to the transfer surface (printing surface). 【0010】 The characters recorded on the printer tape 2 may include, for example, typical characters, symbols such as barcodes and QR codes (registered trademarks), numbers, figures, patterns, and the like. The printing device 1 according to this embodiment can record characters of different colors (for example, two colors of black and red) on the printer tape 2. 【0011】 The printing device 1 mainly includes a housing 4, a tape cassette 5 housed inside the housing 4, a thermal head 6, a platen roller 7, a nip roller 71, and a control board 8. 【0012】 The housing 4 may be, for example, a box-shaped member made of a plastic case. An outlet 9 for taking out the printed printer tape 2 is formed on the outer wall of the housing 4. A cutter (not shown) may be provided near the outlet 9. By cutting using the cutter, the printer tape 2 can be separated and taken out as labels of sizes for each unit of use. 【0013】 The tape cassette 5 may be a detachable cartridge attached to the housing 4. The tape cassette 5 may contain, in order from upstream to downstream in the tape transport direction D1 (from right to left in Figure 1), a printer tape roll 10 (or label tape roll), an ink ribbon roll 12, an ink ribbon release member 13, an ink ribbon winding roll 14, a lamination roller 72, and a lamination film roll 73. In this embodiment, the printer tape roll 10, ink ribbon roll 12, lamination roller 72, and lamination film roll 73 are of a type that are used while housed in the tape cassette 5, but they may also be of a type that are directly attached to the printing device 1 for use. 【0014】 The printer tape roll 10 is made by winding the printer tape 2 into a cylindrical shape and is rotatably held in, for example, the tape cassette 5. 【0015】 The ink ribbon roll 12 is made by winding the ink ribbon 3 into a cylindrical shape and is rotatably held in, for example, a tape cassette 5. A ribbon drive shaft 18 provided in the housing 4 is inserted into the ink ribbon winding roll 14. The rotational force R1 generated by driving the ribbon drive shaft 18 is transmitted to the ink ribbon winding roll 14, causing the ink ribbon winding roll 14 to rotate. 【0016】 The ink ribbon release member 13 may be a guide member that changes the transport direction D2 of the ink ribbon 3. The ink ribbon release member 13 may have a shape that can contact the ink ribbon 3 while it is being transported, for example, a roller shape or a blade shape. The ink ribbon 3 is partially heat-pressed onto the printer tape 2 by the thermal head 6 and transported together with the printer tape 2 toward the outlet 9. The ink ribbon release member 13 contacts the ink ribbon 3 during transport and changes the transport direction D2 of the ink ribbon 3 at a sharp angle with respect to the transport direction D1 of the printer tape 2. As a result, the printer tape 2 and the ink ribbon 3 are pulled apart, and the ink ribbon 3 is peeled off from the printer tape 2. 【0017】 The bonding roller 72 can, for example, have a bonding roller drive shaft 75, provided in the housing 4, into which it can be inserted. The rotational force R4 generated by the driving of the bonding roller drive shaft 75 is transmitted to the bonding roller 72, causing the bonding roller 72 to rotate. As shown in Figure 1, the bonding roller 72 is provided inside the tape cassette 5, and a portion of it is exposed in the transport path of the printer tape 2. This allows the printer tape 2 to be transported sandwiched between the bonding roller 72 and the nip roller 71 when the tape cassette 5 is installed. 【0018】 The laminated film roll 73 is made by winding the laminated tape 76 into a cylindrical shape and is rotatably held in, for example, the tape cassette 5. 【0019】 The thermal head 6 is positioned between the printer tape roll 10 and the ink ribbon roll 12 and the ink ribbon release member 13 in the transport direction D1 of the printer tape 2. The thermal head 6 includes a substrate 19 and a heating element 20 (e.g., a heating resistor) formed on the substrate 19. The Joule heat generated by energizing the heating element 20 is used for the thermal transfer of the ink from the ink ribbon 3. 【0020】 For example, a platen drive shaft 21 provided in the housing 4 is inserted into the platen roller 7. The rotational force R2 generated by the drive of the platen drive shaft 21 is transmitted to the platen roller 7, causing the platen roller 7 to rotate. 【0021】 The nip roller 71 has, for example, a nip roller drive shaft 74, which is provided in the housing 4, inserted into it. The rotational force R3 generated by the driving of the nip roller drive shaft 74 is transmitted to the nip roller 71, causing the nip roller 71 to rotate. 【0022】 The control board 8 is an electronic device that performs electrical control of the printing device 1 and is installed inside the housing 4. 【0023】 [Electrical configuration of printing device 1] Figure 2 is a block diagram showing the electrical configuration of the printing device 1. 【0024】 Referring to Figure 2, the control board 8 of the printing apparatus 1 is provided with a control circuit 22. The control circuit 22 may include a CPU 23, ROM 24, memory 25, RAM 26, and an input / output I / F 27 (interface). These are electrically connected, for example, via a data bus (not shown). 【0025】 ROM 24 stores various programs for driving the printing device 1 (for example, control programs that execute each process shown in Figures 3 and 4A,B). The CPU 23 controls the printing device 1 overall by executing signal processing according to the programs stored in ROM 24 while utilizing the temporary storage function of RAM 26. Memory 25 may be composed of, for example, a part of the storage area of ​​ROM 24. Memory 25 may have a table pre-stored in it for displaying the remaining amount (consumption) of the ink ribbon 3 on the display unit (not shown) of the housing 4. 【0026】 The input / output interface 27 is electrically connected to a first drive circuit 28 and a second drive circuit 29. The first drive circuit 28 controls the energization of the heating element 20 of the thermal head 6. The second drive circuit 29 controls the drive motor 30 that rotates the ink ribbon winding roll 14, platen roller 7, nip roller 71, and bonding roller 72 by outputting drive pulses. 【0027】 [Flow of the printing process using printing device 1] Figure 3 is a schematic diagram illustrating the heating and cooling processes of the printing apparatus 1. Figures 4A and 4B are schematic diagrams illustrating the cooling and transfer processes of the printing apparatus 1. Figure 4B is an enlarged view of the main part of the transfer pattern as seen from the direction of arrow 4B in Figure 4A. The printing process by the printing apparatus 1 will be specifically explained with reference to Figures 1, 3, and 4A,B. 【0028】 To print characters on the printer tape 2, the printer tape 2 is pulled out from the printer tape roll 10 by the rotational drive of the platen roller 7, and the ink ribbon 3 is pulled out from the ink ribbon roll 12 by the rotational drive of the ink ribbon winding roll 14. As a result, as shown in Figures 1 and 3, the printer tape 2 and the ink ribbon 3 are transported downstream in an overlapping state. On the printer tape 2, the side facing the ink ribbon 3 is the printing surface 31 (front), and the opposite side is the back surface 32. On the ink ribbon 3, the side facing the printer tape 2 is the adhesive surface 33 (front), and the opposite side is the back surface 34. 【0029】 Referring to Figure 3, the ink ribbon 3 includes a base layer 35, a first ink layer 36, and a second ink layer 37. The first ink layer 36 and the second ink layer 37 are laminated in this order on the surface 38 of the base layer 35, which is an example of the first surface. The surface opposite the surface 38 of the base layer 35 is the back surface 39 (the back surface 34 of the ink ribbon 3). The first ink layer 36 and the second ink layer 37 contain colorants of different colors. 【0030】 The ink ribbon 3 is transported toward the thermal head 6 with the second ink layer 37 and the printer tape 2 in contact. In the thermal head 6, a heating process is performed as shown in Figure 3. Specifically, by pressing the heating element 20, which is heated by the application of electricity, against the ink ribbon 3, this heat is transferred to the first ink layer 36 and the second ink layer 37 via the base layer 35. The laminate of the ink ribbon 3 and the printer tape 2 is sandwiched between the thermal head 6 and the platen roller 7, and is transported downstream while being heated by the thermal head 6. 【0031】 The heating element 20 may be controlled to the same temperature overall, or it may be controlled to different temperatures in parts. For example, as shown in Figure 3, the first part 40 of the heating element 20 may be controlled to a relatively low first heating temperature, and the second part 41 of the heating element 20 may be controlled to a second heating temperature higher than the first heating temperature. The first heating temperature may be controlled by applying a relatively low first energy amount to the thermal head 6, and the second heating temperature may be controlled by applying a second energy amount relatively higher than the first energy amount to the thermal head 6. 【0032】 The first heating temperature is, for example, 60°C to 120°C, preferably 70°C to 90°C. The second heating temperature is, for example, 80°C to 180°C, preferably 130°C to 150°C. The first and second energy amounts should be set according to the specifications of the printing apparatus 1 so that the thermal head 6 is heated to the first and second heating temperatures, respectively. For example, in a printing apparatus 1 where the applied energy amount can be directly set by a voltage value, a voltage value can be set, or in a printing apparatus 1 where the applied energy amount can be increased or decreased by adjusting the energy amount in multiple stages, the energy amount of the appropriate stage should be set. 【0033】 As a result, the ink ribbon 3 may include a first portion 42 heated at a first heat-generating temperature and a second portion 43 heated at a second heat-generating temperature. In the first portion 42 and the second portion 43 of the ink ribbon 3, at least part or all of the first ink layer 36 and the second ink layer 37 melt or soften and adhere to the printer tape 2. 【0034】 Referring to Figures 3 and 4A,B, a cooling process is performed in the section between the thermal head 6 and the ink ribbon release member 13. Specifically, the ink ribbon 3, which has been heat-pressed onto the printer tape 2 in the heating process, cools naturally in the section from the thermal head 6 to the ink ribbon release member 13, and its temperature decreases toward the operating environment temperature of the printing device 1. 【0035】 Next, as shown in Figures 4A and 4B, the ink ribbon release member 13 selectively changes only the transport direction D2 of the ink ribbon 3, thereby applying an external force F1 to the base layer 35 and the second ink layer 37 in a direction away from each other. This separates the printer tape 2 and the ink ribbon 3, and the ink ribbon 3 is wound onto the ink ribbon winding roll 14. At this time, the first portion 42 and the second portion 43 of the ink ribbon 3, which have been heated by the thermal head 6, selectively remain on the printer tape 2, thereby performing the transfer process. For example, in the first portion 42, delamination may occur between the base layer 35 and the laminate including the first ink layer 36 and the second ink layer 37, and the laminate may be transferred. On the other hand, in the second portion 43, delamination may occur between the first ink layer 36 and the second ink layer 37, and the second ink layer 37 may be selectively transferred. 【0036】 Subsequently, as shown in Figure 1, the laminating tape 76 is attached to the printer tape 2 on which the first ink layer 36 and the second ink layer 37 have been transferred. The transferred tape 55, formed by attaching the laminating tape 76 to the printer tape 2 and on which the characters are recorded, is removed from the output outlet 9 of the printing device 1. [Layer structure of transferred tape 55] Figures 5A and 5B are schematic cross-sectional views showing the layer structure of a transferred tape 55 according to one embodiment of the present disclosure. Figures 6A and 6B show an example of a printed pattern 44 by the printing apparatus 1. 【0037】 Referring to Figures 5A and 5B, the transferred tape 55 includes a printed material 56 containing a printer tape 2 on which a portion of the ink ribbon 3 has been transferred, and a laminated tape 76 bonded to the printed material 56. The laminated tape 76 may also be called a laminated film. Figure 5A shows a cross-section of the portion of the transferred tape 55 in which the laminate of the first ink layer 36 and the second ink layer 37 has been transferred as the first transfer layer 57. Figure 5B shows a cross-section of the portion of the transferred tape 55 in which the second ink layer 37 has been selectively transferred as the second transfer layer 58. 【0038】 In this embodiment, the transferred tape 55 has a laminated tape 76 formed as a backing film that supports the first transfer layer 57 and the second transfer layer 58. The printer tape 2 is formed as a transparent cover film that physically protects the first transfer layer 57 and the second transfer layer 58 from the outside. Therefore, in the first transfer layer 57 and the second transfer layer 58, the second ink layer 37 on the side closer to the printer tape 2 is the surface-side ink layer (observation-side ink layer). As shown by the white arrows 59 and 60 in Figures 5A and 5B, a person can perceive the respective colors of the first ink layer 36 and the second ink layer 37 by the light that passes through the printer tape 2 and is reflected by the first ink layer 36 or the second ink layer 37, respectively. 【0039】 The first transfer layer 57 and the second transfer layer 58 form a printed pattern 44 of different colors on the transferred tape 55. The printed pattern 44 may have different colors for each independent character, for example, as shown in Figure 6A. In Figure 6A, when viewing the printed pattern 44 from the back side 32 of the printer tape 2, the second color pattern 45 based on the second ink layer 37 may be recognized on the outermost surface of the letters "A" and "C", and the first color pattern 46 based on the first ink layer 36 may be recognized on the outermost surface of "B". On the other hand, as shown in Figure 6B, the printed pattern 44 may have both the second color pattern 45 and the first color pattern 46 recognized for each part of each character. 【0040】 Next, we will provide a more detailed explanation of the layer structure of the transferred tape 55. 【0041】 As described above, the transferred tape 55 is formed by bonding the printed material 56 and the adhesive tape 76. 【0042】 The printed material 56 includes a printer tape 2 and a first transfer layer 57 and a second transfer layer 58 selectively formed on the printing surface 31 of the printer tape 2, respectively. The first transfer layer 57 includes a second ink layer 37, an intermediate layer 51, and a first ink layer 36 that are sequentially laminated on the printing surface 31, and the second transfer layer 58 is the second ink layer 37 formed on the printing surface 31. (1) Printer tape 2 The printer tape 2 is not particularly limited as long as it is a transparent base film to which ink is directly transferred, and examples include resin films such as polyester, polyethylene, polypropylene, polyamide, polyimide, polycarbonate, polystyrene, and fluororesin. Of these, polyethylene terephthalate (PET) film, which is a type of polyester, is preferred from the viewpoint of mechanical strength, dimensional stability, heat treatment resistance, and cost. The printer tape 2 may be a single layer of any of the above resin films, or it may be a laminated film formed by laminating multiple of the above resin films. 【0043】 The thickness of the printer tape 2 can be arbitrarily set according to, for example, the specifications of the thermal transfer printer, the characteristics required of the printer tape 2, etc. For example, the thickness of the printer tape 2 is 1 μm or more, preferably 10 μm or more. For example, the thickness of the printer tape 2 is 100 μm or less, preferably 50 μm or less. For example, the thickness of the printer tape 2 is 1 μm or more and 100 μm or less, preferably 10 μm or more and 50 μm or less. If the thickness of the printer tape 2 is within this range, it is possible to give the transferred tape 55 appropriate flexibility while exhibiting sufficient mechanical strength and elasticity. If the flexibility of the transferred tape 55 is important, the printer tape 2 may be thinner than the above range. This makes it possible to adhere the transferred tape 55 well to complex curved surfaces. On the other hand, if the mechanical strength and elasticity of the transferred tape 55 are important, the printer tape 2 may be thicker than the above range. This makes it possible to suppress the occurrence of wrinkles in the printer tape 2 during transport in the printing device 1 or when bonding the bonding tape 76. 【0044】 The printer tape 2 may be an unstretched film that has not undergone stretching during the manufacturing process, or it may be a stretched film that has undergone stretching such as uniaxial stretching or biaxial stretching. Furthermore, the surface of the printer tape 2 (printing surface 31 and back surface 32) may be finished with a glossy finish, a matte finish, or other surface finishing processes. Additionally, a primer layer to improve printability on the printer tape 2, an overcoat layer to adjust friction, and a silicone-based release layer to protect the surface of the printer tape 2 before use may be formed separately. Conceptually, these layers may be part of the printer tape 2. 【0045】 As a numerical value representing the transparency of the printer tape 2, for example, the total light transmittance measured in accordance with JIS K 7361 may be used. The total light transmittance of the printer tape 2 is, for example, 80% or more, and preferably 85% or more. The total light transmittance of the printer tape 2 can be measured, for example, using a haze meter. (2) First ink layer 36 The first ink layer 36 can be formed, for example, from any thermoplastic resin. It is preferable to use an epoxy resin as the thermoplastic resin for the first ink layer 36, considering improvements in affinity and adhesion to the intermediate layer 51. The first ink layer 36 can be formed using an epoxy resin as the thermoplastic resin, without any curing agent added. 【0046】 Examples of epoxy resins include bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, alicyclic epoxy resin, hydrogenated bisphenol A type epoxy resin, hydrogenated bisphenol AD ​​type epoxy resin, aliphatic epoxy resins such as propylene glycol glycoxy ether and pentaerythritol polyglycidyl ether, epoxy resins obtained from aliphatic or aromatic amines and epichlorohydrin, epoxy resins obtained from aliphatic or aromatic carboxylic acids and epichlorohydrin, heterocyclic epoxy resins, spiroring-containing epoxy resins, epoxy-modified resins, and brominated epoxy resins. Specific examples of epoxy resins are not particularly limited, but examples include the following various epoxy resins. These epoxy resins can be used individually or in combination of two or more types. 【0047】 Among the JER (registered trademark) series epoxy resins manufactured by Mitsubishi Chemical Corporation, the basic solid types are 1001 [softening point (ring and ball method): 64°C, number average molecular weight Mn: about 900], 1002 [softening point (ring and ball method): 78°C, number average molecular weight Mn: about 1200], 1003 [softening point (ring and ball method): 78°C, number average molecular weight Mn: about 1200], Softening point (ring and ball method): 89℃, number average molecular weight Mn: approx. 1300], 1055 [softening point (ring and ball method): 93℃, number average molecular weight Mn: approx. 160 0], 1004 [Softening point (ring and ball method): 97℃, number average molecular weight Mn: about 1650], 1004AF [Softening point (ring and ball method): 97℃, number average Molecular weight Mn: about 1650], 1007 [softening point (ring and ball method): 128℃, number average molecular weight Mn: about 2900], 1009 [softening point (ring and ball method) method): 144℃, number average molecular weight Mn: approximately 3800], 1010 [number average molecular weight Mn: approximately 5500], 1003F [softening point (ring and ball method): 96℃], 1004F [Softening point (ring and ball method): 103℃], 1005F, 1009F [Softening point (ring and ball method): 144℃], 1004FS [Softening point (ring and ball method): 100℃], 1006FS [Softening point (ring and ball method): 112℃], 1007FS [Softening point (ring and ball method): 124℃]. 【0048】 The softening point of the epoxy resin used in the first ink layer 36 is, for example, 95°C or higher, preferably 110°C or higher, and more preferably 125°C or higher. If the softening point is within this range, it is possible to suppress the occurrence of high adhesion between the first ink layer 36 and the substrate layer 35 (see Figures 3 and 4A,B) at relatively low temperatures during low-temperature transfer. Since the low-temperature transfer range of the first ink layer 36 can be sufficiently extended to the high-temperature side, it is possible to suppress color blurring even when continuous thermal transfer recording is performed. 【0049】 The first ink layer 36 may contain an adhesive in addition to the epoxy resin. The inclusion of an adhesive can further improve the affinity and adhesion to the intermediate layer 51. Examples of adhesives include rubber-based adhesives, acrylic-based adhesives, silicone-based adhesives, vinyl alkyl ether-based adhesives, polyvinyl alcohol-based adhesives, polyvinylpyrrolidone-based adhesives, polyacrylamide-based adhesives, and cellulose-based adhesives. 【0050】 Considering the affinity and compatibility with epoxy resin, as well as the affinity and adhesion to the intermediate layer 51, an acrylic adhesive is preferred as the adhesive. Specific examples of acrylic adhesives are not particularly limited, but include the following various acrylic adhesives. These acrylic adhesives can be used individually or in combination of two or more. 【0051】 Among the Olivine® BPS (solvent-based) series manufactured by Toyo Chem Co., Ltd., BPS1109 (non-volatile content: 39.5% by mass), BPS3156D (non-volatile content: 34% by mass), BPS4429-4 (non-volatile content: 45% by mass), BPS4849-40 (non-volatile content: 40% by mass), BPS5160 (non-volatile content: 33% by mass), BPS5213K (non-volatile content: 35% by mass), BPS5215K (non-volatile content: 39% by mass), BPS5227-1 (non-volatile content: 41.5% by mass), BPS5296 (non-volatile content: 37% by mass), BPS5330 (non-volatile content: 40% by mass), BPS5375 (non-volatile content: 45% by mass), BPS5448 (non-volatile content: 40% by mass), BPS5513 (non-volatile content: 44.5% by mass), BPS55 65K (non-volatile content: 45% by mass), BPS5669K (non-volatile content: 46% by mass), BPS5762K (non-volatile content: 45.5% by mass), BPS5896 (non-volatile content: 37% by mass), BPS5978 (non-volatile content: 35% by mass), BPS6074HTF (non-volatile content: 52% by mass), BPS6080TFK (non-volatile content: 45% by mass), BPS6130TF (non-volatile content) BPS6153K (non-volatile content: 45.5% by mass), BPS6163 (non-volatile content: 37% by mass), BPS6231 (non-volatile content: 56% by mass), BPS6421 (non-volatile content: 47% by mass), BPS6430 (non-volatile content: 33% by mass), BPS6574 (non-volatile content: 57% by mass), BPS8170 (non-volatile content: 36.5% by mass), BPS HS-1 (non-volatile content: 40% by mass). 【0052】 Among the solvent-based adhesives (removable type) manufactured by Lion Specialty Chemicals Co., Ltd., the following are included: AS-325 (solid content concentration: 45% by mass), AS-375 (solid content concentration: 45% by mass), AS-409 (solid content concentration: 45% by mass), AS-417 (solid content concentration: 45% by mass), AS-425 (solid content concentration: 45% by mass), AS-455 (solid content concentration: 45% by mass), AS-665 (solid content concentration: 40% by mass), AS-1107 (solid content concentration: 43% by mass), and AS-4005 (solid content concentration: 45% by mass). 【0053】 The acrylic adhesive used in the first ink layer 36 may be used in combination with a tackifier. This is because, for example, it can improve the sharpness of the first ink layer 36, suppress excess peeling, and improve the clarity of the recorded characters. Examples of tackifiers include ester gum, terpene phenol resin, rosin ester, etc. There are no particular limitations on specific examples of tackifiers, but examples include the following various tackifiers. These tackifiers can be used alone or in combination of two or more. 【0054】 Among the terpene phenol resins of the YS Polystar series manufactured by Yasuhara Chemical Co., Ltd., U130 (softening point: 130±5℃), U115 (softening point: 115±5℃), T160 (softening point: 160±5℃), T145 (softening point: 145±5℃), T130 (softening point: 130±5℃), T115 (softening point: 115± 5℃), T100 (softening point: 100±5℃), T80 (softening point: 80±5℃), S145 (softening point: 145±5℃), G150 (softening point: 150±5℃) , G125 (softening point: 125±5℃), N125 (softening point: 125±5℃), K125 (softening point: 125±5℃), TH130 (softening point: 130±5℃). 【0055】 Among the ester gums manufactured by Arakawa Chemical Co., Ltd., AA-G [softening point (ring and ball method): 82~88℃], AA-L [softening point (ring and ball method): 82~88℃], AA-V [softening point (ring and ball method): 82~95℃] , 105 [Softening point (ring and ball method): 100~110℃], AT [Viscosity: 20000~40000mPa·s], H [Softening point (ring and ball method): 68~75℃], HP [Softening point (ring and ball method): 80℃ or higher]. 【0056】 Among the rosin esters in the Pencel (registered trademark) series manufactured by Arakawa Chemical Industries, Ltd., GA-100 [softening point (ring-ball method): 100~110℃], AZ [softening point (ring-ball method): 95 ~105℃], C [Softening point (ring and ball method): 117~127℃], D-125 [Softening point (ring and ball method): 120~130℃], D-135 [Softening Point (ring and ball method): 130~140℃], D-160 [softening point (ring and ball method): 150~165℃], KK [softening point (ring and ball method): 165℃ or higher]. 【0057】 The softening point of the tackifier used in the first ink layer 36 is, for example, 60°C or higher, preferably 120°C or lower. If the softening point is within this range, the first ink layer 36 and the intermediate layer 51 can be smoothly reverse-transferred to the substrate layer 35 during high-temperature transfer. Since the high-temperature transfer range of the first ink layer 36 can be sufficiently extended to the low-temperature side, color blurring can be suppressed. 【0058】 The first ink layer 36 may contain any colorant. As the colorant, one or more different colorants can be used, depending on the color of the first ink layer 36. For example, the colorant may be a pigment or a dye. Considering the opacity of the substrate, a pigment is preferred as the colorant used in the first ink layer 36. In other words, by suppressing the transmission of light through the first ink layer 36, the color of the first ink layer 36 can be clearly perceived as black as a complementary color effect through the printer tape 2 and the second ink layer 37. Details of the colorant of the first ink layer 36 will be described later. 【0059】 The proportion of each component in the first ink layer 36 is not particularly limited. The proportion of acrylic adhesive to 100 parts by mass of epoxy resin is, for example, 30 parts by mass or more, preferably 40 parts by mass or more. The proportion of acrylic adhesive to 100 parts by mass of epoxy resin is, for example, 150 parts by mass or less, preferably 100 parts by mass or less. The proportion of acrylic adhesive to 100 parts by mass of epoxy resin is, for example, 30 parts by mass or more and 150 parts by mass or less, preferably 40 parts by mass or more and 100 parts by mass or less. 【0060】 The ratio of tackifier to 100 parts by mass of epoxy resin is, for example, 3 parts by mass or more, preferably 5 parts by mass or more. The ratio of tackifier to 100 parts by mass of epoxy resin is, for example, 150 parts by mass or less, preferably 100 parts by mass or less. The ratio of tackifier to 100 parts by mass of epoxy resin is, for example, 3 parts by mass or more and 150 parts by mass or less, preferably 5 parts by mass or more and 100 parts by mass or less. 【0061】 The ratio of coloring agent to 100 parts by mass of epoxy resin is, for example, 100 parts by mass or more, preferably 130 parts by mass or more. The ratio of coloring agent to 100 parts by mass of epoxy resin is, for example, 230 parts by mass or less, preferably 200 parts by mass or less. The ratio of coloring agent to 100 parts by mass of epoxy resin is, for example, 100 parts by mass or more and 230 parts by mass or less, preferably 130 parts by mass or more and 200 parts by mass or less. 【0062】 Furthermore, for components of the first ink layer 36 that are supplied in liquid form dissolved or dispersed in any solvent, the amount of each component should be adjusted so that the proportion of the active ingredient falls within the above range (the same applies hereinafter). 【0063】 The first ink layer 36 can be formed, for example, by applying a coating material obtained by dissolving or dispersing each of the above components in any solvent directly onto the surface 38 of the base layer 35, or via any release layer, and then drying it. In this disclosure, the characters to be recorded on the printer tape 2 are color-coded, as shown in Figures 6A and 6B. For this color coding, considering the adjustment of the adhesion between the first ink layer 36 and the base layer 35 and each of the other layers, it is preferable that the first ink layer 36 be formed directly on the surface 38 of the base layer 35 without a release layer. 【0064】 The thickness of the first ink layer 36 can be set arbitrarily, for example, according to the specifications of the thermal transfer printer. The thickness of the first ink layer 36 can be adjusted by the amount of ink applied to the first ink layer 36. 【0065】 For example, the amount of the first ink layer 36 applied is 0.1 g / m², expressed as the amount of solids per unit area. 2 The above is preferable, and preferably 0.5 g / m 2 That concludes the explanation. For example, the amount of the first ink layer 36 applied is 3.0 g / m², expressed as the amount of solids per unit area. 2 The following, preferably 2.5 g / m² 2The following applies. For example, the amount of the first ink layer 36 applied is 0.1 g / m², expressed as the amount of solids per unit area. 2 More than 3.0g / m 2 The following, preferably 0.5 g / m 2 More than 2.5g / m 2 The following applies: 【0066】 The specific thickness of the first ink layer 36 (before printing) is, for example, 0.05 μm or more, preferably 0.5 μm or more. The thickness of the first ink layer 36 is, for example, 3.0 μm or less, preferably 2.5 μm or less. The thickness of the first ink layer 36 may also be, for example, 0.05 μm or more and 3.0 μm or less, preferably 0.5 μm or more and 2.5 μm or less. The thickness of the first ink layer 36 can be confirmed, for example, based on SEM (Scanning Electron Microscope) images, TEM (Transmission Electron Microscope) images, etc. of the ink ribbon 3. (3) Middle layer 51 The intermediate layer 51 contains a thermoplastic elastomer. In particular, it is preferable that the intermediate layer 51 be formed solely of a thermoplastic elastomer. The thermoplastic elastomer forming the intermediate layer 51 preferably contains at least one of a styrene-based thermoplastic elastomer and an acetate ester-based thermoplastic elastomer. 【0067】 Examples of styrene-based thermoplastic elastomers include styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS), and styrene-isoprene-styrene block copolymer (SIS). Examples of acetate ester-based thermoplastic elastomers include ethylene-vinyl acetate copolymer (EVA). 【0068】 The styrene content in the thermoplastic elastomer contained in the intermediate layer 51 is, for example, 10% by mass or more and 70% by mass or less, preferably 15% by mass or more and 50% by mass or less. If the styrene content is too high, the rubbery elasticity of the intermediate layer 51 decreases, and during low-temperature transfer, it may not be possible to maintain adhesion to the first ink layer 36 and the second ink layer 37, or the color of the characters may become cloudy. If the styrene content is too low, the rubbery elasticity of the intermediate layer 51 becomes too high, and during high-temperature transfer, it may not be possible to peel off the second ink layer 37, causing the color of the characters to become cloudy. 【0069】 The thermoplastic elastomer contained in the intermediate layer 51 has a melt mass flow rate (hereinafter sometimes simply abbreviated as "MFR") of, for example, 1000 g / 10 min or less, preferably 400 g / 10 min or less. The MFR may be, for example, the MFR at a temperature of 190°C and a load of 2.16 kg, as determined by the measurement method specified in ISO 1133-1:2011. In the following, unless otherwise specified, the measurement conditions for the MFR are a temperature of 190°C and a load of 2.16 kg. 【0070】 Thermoplastic elastomers with an MFR exceeding 400 g / 10 min tend to have too strong an affinity for the second ink layer 37. As a result, the second ink layer 37 may not be able to be peeled off during high-temperature transfer, causing the color of the characters to become muddy. In addition, the entire ink ribbon 3, i.e., the base layer 35, the first ink layer 36, the intermediate layer 51, and the second ink layer 37, may adhere to the printing surface 31 of the printer tape 2. Thermoplastic elastomers with an MFR exceeding 400 g / 10 min have low melt viscosity and high fluidity, so during low-temperature transfer, they may not be able to maintain adhesion to the first ink layer 36 and the second ink layer 37, or the color of the characters may become muddy. 【0071】 In contrast, if the thermoplastic elastomer has an MFR of 400 g / 10 min or less, it is possible to suppress the problems that may occur when using thermoplastic elastomers with an MFR exceeding 400 g / 10 min. Furthermore, even when thermal transfer recording is performed continuously, the colors on the printed surface 31 of the printer tape 2 do not easily become muddy, and the two colors are clearly separated. Moreover, it is possible to stably record characters with excellent clarity without excessive peeling. To further improve these effects, it is preferable that the MFR of the thermoplastic elastomer be 2.5 g / 10 min or less, and especially 2.3 g / 10 min or less, even within the above range. 【0072】 There are no particular restrictions on the lower limit of MFR, and thermoplastic elastomers that show "No Flow" in the measurement results at the aforementioned temperature of 190°C and load of 2.16 kg can be used. Specific examples of thermoplastic elastomers are not particularly limited, but include the following types of thermoplastic elastomers. These thermoplastic elastomers can be used individually or in combination of two or more types. 【0073】 Among the SEBS products in the ToughTec (registered trademark) series manufactured by Asahi Kasei Corporation, the following are included: H1521 [MFR: 2.3g / 10min], H1051 [MFR: less than 0.8g / 10min], H1052 [MFR: less than 13.0g / 10min], H1272 [MFR: No Flow], P1083 [MFR: 3.0g / 10min], P1500 [MFR: 4.0g / 10min], P5051 [MFR: 3.0g / 10min], and P2000 [MFR: 3.0g / 10min]. 【0074】 Among the SBS products in the Toughprene® series manufactured by Asahi Kasei Corporation, A [MFR: 2.6g / 10min], 125 [MFR: 4.5g / 10min], and 126S [MFR: 4.5g / 10min]. 【0075】 Among the Asaprene® T series SBS manufactured by Asahi Kasei Corporation, T-411 [MFR: No Flow], T-432 [MFR: No Flow], T-437 [MFR: No Flow], T-438 [MFR: No Flow], and T-439 [MFR: No Flow]. 【0076】 The following are SEPS models from Kuraray Co., Ltd.'s Septon® series: 2002 [MFR: 70g / 10min], 2004F [MFR: 5g / 10min], 2005 [MFR: No Flow], 2006 [MFR: No Flow], 2063 [MFR: 7g / 10min], and 2104 [MFR: 0.4g / 10min]. The MFR measurement conditions for all of these SEPS models were 230°C and 2.16kg load. 【0077】 The following are SEEPS devices from the Septon® series manufactured by Kuraray Co., Ltd.: 4033 [MFR: <0.1g / 10min], 4044 [MFR: No Flow], 4055 [MFR: No Flow], 4077 [MFR: No Flow], and 4099 [MFR: No Flow]. The MFR measurement conditions for all of these SEEPS devices were 230°C and 2.16kg load. 【0078】 Among the vinyl SIS products in the Hybler (registered trademark) series manufactured by Kuraray Co., Ltd., 5125 [MFR: 4g / 10min] and 5127 [MFR: 5 / 10min]. 【0079】 Among the EVAs of the ULTRASEN (registered trademark) series manufactured by Tosoh Corporation, 514R [MFR: 0.41 g / 10 min], 515 [MFR: 2.5 g / 10 min], 510 [MFR: 2.5 g / 10 min], 510F [MFR: 2.5 g / 10 min], 520F [MFR: 2.0 g / 10 min], 540 [MFR: 3.0 g / 10 min], 540F [MFR: 3.0 g / 10 min], 537 [MFR: 8.5 g / 10 min], 537L [MFR: 8.5 g / 10 min], 537S-2 [MFR: 8.5 g / 10 min], 541 [MFR: 9.0 g / 10 min], 541L [MFR: 9.0 g / 10 min], 530 [MFR: 75 g / 10 min], 526 [MFR: 25 g / 10 min], 630 [MFR: 1.5 g / 10 min], 631 [MFR: 1.5 g / 10 min], 636 [MFR: 2.5 g / 10 min], 625 [MFR: 14 g / 10 min], 626 [MFR: 3.0 g / 10 min], 627 [MFR: 0.8 g / 10 min], 633 [MFR: 20 g / 10 min], 635 [MFR: 2.4 g / 10 min], 640 [MFR: 2.8 g / 10 min], 634 [MFR: 4.3 g / 10 min], 680 [MFR: 160 g / 10 min], 681 [MFR: 350 g / 10 min], 751 [MFR: 5.7 g / 10 min], 710 [MFR: 18 g / 10 min], 720 [MFR: 150 g / 10 min], 722 [MFR: 400 g / 10 min], 750 [MFR: 30 g / 10 min], 752 [MFR: 60 g / 10 min], 760 [MFR: 70 g / 10 min]. 【0080】 The intermediate layer 51 can be formed, for example, by applying a coating material obtained by dissolving or dispersing a forming material for the intermediate layer 51 containing at least a thermoplastic elastomer in an arbitrary solvent onto the first ink layer 36 and then drying it. 【0081】 The thickness of the intermediate layer 51 can be arbitrarily set according to, for example, the specifications of the thermal transfer printer and the like. The thickness of the intermediate layer 51 can be adjusted by the coating amount of the intermediate layer 51. For example, the coating amount of the intermediate layer 51 is represented by the solid content per unit area and is 0.1 g / m 2The above is preferable, and preferably 0.2 g / m 2 That concludes the explanation. For example, the amount of intermediate layer 51 applied is 2.0 g / m², expressed as the amount of solids per unit area. 2 The following, preferably 1.5 g / m² 2 The following applies: For example, the amount of intermediate layer 51 applied is 0.1 g / m², expressed as the amount of solids per unit area. 2 More than 2.0g / m 2 The following, preferably 0.2 g / m² 2 More than 1.5g / m 2 The following applies: 【0082】 The specific thickness of the intermediate layer 51 (before printing) is, for example, 0.05 μm or more, preferably 0.2 μm or more. The thickness of the intermediate layer 51 is, for example, 2.0 μm or less, preferably 1.5 μm or less. The thickness of the intermediate layer 51 may also be, for example, 0.05 μm or more and 2.0 μm or less, preferably 0.2 μm or more and 1.5 μm or less. The thickness of the intermediate layer 51 can be confirmed, for example, based on SEM (Scanning Electron Microscope) images, TEM (Transmission Electron Microscope) images, etc. of the ink ribbon 3. 【0083】 Due to limitations in coating precision, the thickness of the intermediate layer 51 may vary depending on the measurement location. The coating amount and thickness of the intermediate layer 51 mentioned above may include this error. For example, 0.2 g / m 2 The intermediate layer 51 formed with this coating amount has a measurement of 0.1 g / m² depending on the measurement location. 2 It may have a region having a thickness when formed by the amount of coating applied. (4) Second ink layer 37 The second ink layer 37 can be formed from, for example, any thermoplastic resin. Examples of thermoplastic resins used for the second ink layer 37 include epoxy resin, polyester resin, and polyolefin resin. The thermoplastic resin can be appropriately selected depending on the material used to form the printer tape 2. If the first ink layer 36 is formed from epoxy resin, it is preferable that the second ink layer 37 is also formed from epoxy resin. 【0084】 By forming the second ink layer 37 with epoxy resin, the adhesion force of the first ink layer 36 to the substrate layer 35 and the intermediate layer 51 can be counteracted by the adhesion force of the second ink layer 37 to the printer tape 2. This allows for good separation of the first ink layer 36 and the intermediate layer 51 to the substrate layer 35 side and the second ink layer 37 to the printer tape 2 side during high-temperature transfer. Since the high-temperature transfer range can be extended to the low-temperature side, the effect of suppressing color blurring can be further improved. Examples of epoxy resins include the various epoxy resins exemplified as the epoxy resin for the first ink layer 36. These epoxy resins can be used individually or in combination of two or more types. 【0085】 The second ink layer 37 may contain wax in addition to thermoplastic resin. The inclusion of wax allows for good separation of the first ink layer 36 and the intermediate layer 51 to the substrate layer 35 side and the second ink layer 37 to the printer tape 2 side during high-temperature transfer. As a result, the high-temperature transfer range can be extended to the low-temperature side, further improving the effect of suppressing color blurring. 【0086】 As the wax, any wax having affinity and compatibility with thermoplastic resins such as epoxy resins can be used. For example, natural waxes such as carnauba wax, paraffin wax, and microcrystalline wax, and synthetic waxes such as Fischer-Tropsch wax can be used. There are no particular limitations on specific examples of waxes, but for example, carnauba wax No. 1 flakes, No. 2 flakes, No. 3 flakes, No. 1 powder, and No. 2 powder (all with a melting point of 80-86°C) manufactured by Toyo Chem Co., Ltd., and paraffin waxes EMUSTAR-1155 (melting point: 69°C), EMUSTAR-0135 (melting point: 60°C), and EMUSTAR-0136 (manufactured by Nippon Seiro Co., Ltd.) can be used. Examples include microcrystalline waxes manufactured by Nippon Seiro Co., Ltd., such as EMUSTAR-0001 (melting point: 84°C) and EMUSTAR-042X (melting point: 84°C), and Fischer-Tropsch waxes manufactured by Nippon Seiro Co., Ltd., such as FNP-0090 (setting point: 90°C), SX80 (setting point: 83°C), FT-0165 (melting point: 73°C), and FT-0070 (melting point: 72°C). These waxes can be used individually or in combination of two or more types. 【0087】 The second ink layer 37 may contain any colorant. As the colorant, one or more different colorants can be used, depending on the color of the second ink layer 37. The colorant may be, for example, a pigment and a dye. From the viewpoint of ensuring transparency relative to the first ink layer 36, it is preferable that the second ink layer 37 contains a colorant that includes at least a dye. It is preferable that the second ink layer 37 contains only a dye as the colorant, and may contain a dye and a pigment in a smaller proportion than the dye. Details of the colorant of the second ink layer 37 will be described later. 【0088】 Here, the second ink layer 37, which ensures transparency to the first ink layer 36, may be defined as having light transmittance such that, when the printed pattern 44 of the first transfer layer 57 is viewed from the second ink layer 37 side, the printed pattern 44 is visible as the color of the first ink layer 36. Therefore, when the transferred tape 55 is viewed in the direction indicated by the white arrow 59 in Figure 5A, the printed pattern 44 is recognized as the color of the first ink layer 36. As a numerical value representing the transparency of the second ink layer 37, for example, the total light transmittance measured in accordance with JIS K 7361 may be used. The total light transmittance of the second ink layer 37 is, for example, 16% or more, and preferably 16.5% or more. The total light transmittance of the second ink layer 37 can be measured, for example, using a haze meter. 【0089】 When dyes and pigments are used in combination, the mixing ratio (mass ratio) of the dye is, for example, 50% by mass or more, preferably 70% by mass or more, and more preferably 90% by mass or more. The higher the mass ratio of the dye, the more the transparency of the second ink layer 37 relative to the first ink layer 36 can be improved. 【0090】 Furthermore, the L value of the color difference of the reflected light from the second ink layer 37 is 20 or less, preferably 15 or less, more preferably 10 or less, and particularly preferably 5 or less. The L value may be, for example, the reflected density (L value) measured when a light beam is incident on the ink ribbon 3 from the side of the second ink layer 37 using a reflectance colorimeter. If the L value of the reflected light from the second ink layer 37 is within the above range, sufficient transparency to the first ink layer 36 can be ensured. 【0091】 The proportion of each component in the second ink layer 37 is not particularly limited. The proportion of wax to 100 parts by mass of epoxy resin is, for example, 3 parts by mass or more, preferably 5 parts by mass or more. The proportion of wax to 100 parts by mass of epoxy resin is, for example, 11 parts by mass or less, preferably 9 parts by mass or less. The proportion of wax to 100 parts by mass of epoxy resin is, for example, 3 parts by mass or more and 11 parts by mass or less, preferably 5 parts by mass or more and 9 parts by mass or less. 【0092】 The ratio of colorant to 100 parts by mass of epoxy resin (total amount of colorant) is, for example, 70 parts by mass or more, preferably 80 parts by mass or more. The ratio of colorant to 100 parts by mass of epoxy resin is, for example, 140 parts by mass or less, preferably 120 parts by mass or less. The ratio of colorant to 100 parts by mass of epoxy resin is, for example, 70 parts by mass or more and 140 parts by mass or less, preferably 80 parts by mass or more and 120 parts by mass or less. 【0093】 The second ink layer 37 can be formed, for example, by applying a coating material obtained by dissolving or dispersing each of the above components in any solvent onto the intermediate layer 51 and then drying it. 【0094】 The thickness of the second ink layer 37 can be arbitrarily set according to, for example, the specifications of the thermal transfer printer. The thickness of the second ink layer 37 can be adjusted by the amount of ink applied to the second ink layer 37. For example, the amount of ink applied to the second ink layer 37 can be expressed as 0.2 g / m² in terms of solid content per unit area. 2 The above is preferable, preferably 1.0 g / m 2 That concludes the explanation. For example, the amount of the second ink layer 37 applied is 7.0 g / m², expressed as the amount of solids per unit area. 2 The following, preferably 5.0 g / m² 2 The following applies: For example, the amount of the second ink layer 37 applied is 0.2 g / m², expressed as the amount of solids per unit area. 2 More than 7.0g / m 2 The following, preferably 1.0 g / m² 2 More than 5.0g / m 2 The following applies: 【0095】 The specific thickness of the second ink layer 37 (before printing) is, for example, 0.05 μm or more, preferably 1.0 μm or more. The thickness of the second ink layer 37 is, for example, 7.0 μm or less, preferably 5.0 μm or less. The thickness of the second ink layer 37 may also be, for example, 0.05 μm or more and 7.0 μm or less, preferably 1.0 μm or more and 5.0 μm or less. The thickness of the second ink layer 37 can be confirmed, for example, based on SEM (Scanning Electron Microscope) images, TEM (Transmission Electron Microscope) images, etc. of the ink ribbon 3. (5) Colorants of the first ink layer 36 and the second ink layer 37 In the transferred tape 55 of this disclosure, as shown by the white arrows 59 and 60 in Figures 5A and 5B, the colors of the first ink layer 36 and the second ink layer 37 are recognized by light that has passed through the printer tape 2 and been reflected by the first ink layer 36 or the second ink layer 37, respectively. Since the color of the first ink layer 36 on the reverse side is recognized by light that has passed through the second ink layer 37, the color of the first ink layer 36 that is actually recognized may differ from the ideal color that is to be recognized as the color of the first ink layer 36. 【0096】 Therefore, in the embodiments of this disclosure, the color recognized as the first ink layer 36 is brought closer to the ideal color by including colorants that are complementary to each other in the first ink layer 36 and the second ink layer 37. "Complementary color relationship" may refer, for example, to the relationship between a reference color selected in a 24-color hue circle and a color having a hue difference of 11 to 12 from that reference color. In other words, "complementary color relationship" may refer to the relationship between a reference color and a color located at a position of 165° to 195° from that reference color in the hue circle. 【0097】 Since mixing complementary colors results in achromatic colors, in this embodiment, the "complementary color relationship" may refer to a combination of colors between the first ink layer 36 and the second ink layer 37 that provides an L value of the color difference of the reflected light from the second ink layer 37 of 20 or less. 【0098】 For example, when black or a near-black achromatic color is required as the first ink layer, various combinations can be exemplified as follows: For example, if the second ink layer 37 is red, the first ink layer 36 is preferably blue-green, which is the complementary color of red. For example, if the second ink layer 37 is purple, the first ink layer 36 is preferably yellow-green, which is the complementary color of purple. For example, if the second ink layer 37 is yellow, the first ink layer 36 is preferably blue-violet, which is the complementary color of yellow. For example, if the second ink layer 37 is orange, the first ink layer 36 is preferably blue, which is the complementary color of orange. 【0099】 For example, the dyes used to color the second ink layer 37 red include oil-soluble dyes, acid dyes, basic dyes, metal-containing dyes, and various salt-forming types of these dyes, as well as the following types of red dyes. These red dyes can be used individually or in combination of two or more types. 【0100】 CI Basic Red 1, 12, 13; CI Acid Red 13, 14, 18, 27, 50, 52; CI Solvent Red 25, 27, 30, 35, 49, 83, 89, 100, 122, 138, 149, 150, 160, 179, 218, 230; CI Direct Red 20, 37, 39, 44; CI Disperse Red 5, 7, 13, 17. 【0101】 For example, the following various red pigments can be used to color the second ink layer 37 red. These red pigments can be used individually or in combination of two or more. 【0102】 CI Pigment Red 5, 7, 9, 12, 48(Ca), 48(Mn), 49, 52, 53, 53:1, 57(Ca), 57:1, 97, 112, 122, 123, 149, 168, 177, 178, 179, 184, 202, 206, 207, 209, 242, 254, 255. 【0103】 The following various green pigments can be used to make the first ink layer 36 blue-green as a complementary color to the second ink layer 37 (red). These green pigments can be used individually or in combination of two or more. 【0104】 CI Pigment Green 7, 10, 36, 37, 58, 59, 62, 63. 【0105】 For example, dyes used to color the second ink layer 37 purple include oil-soluble dyes, acid dyes, basic dyes, metal-containing dyes, and various salt-forming types of these dyes, as well as the following various purple dyes. These purple dyes can be used individually or in combination of two or more types. 【0106】 CI Basic Violet 1, 3, 7, 10, 14, 15, 21, 25, 26, 27, 28; CI Acid Violet 1, 2, 3, 4, 5, 5:1, 6, 7, 7:1, 9, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 23, 24, 25, 27, 29, 30, 31, 33, 34, 36, 38, 39, 41, 42, 43, 47, 49, 51, 63, 67, 72, 76, 96, 97, 102, 103, 109. 【0107】 For example, the following purple pigments can be used to color the second ink layer 37 purple. These purple pigments can be used individually or in combination of two or more. 【0108】 CI Pigment Violet 1, 19, 27, 29, 30, 32, 37, 40, 42, 50. 【0109】 As a pigment to make the first ink layer 36 yellow-green as a complementary color to the second ink layer 37 (purple), a mixture of the aforementioned green pigment and the following various yellow pigments can be used. These green and yellow pigments can be used individually or in combination of two or more. The mixing ratio of the green pigment to the yellow pigment may also be 5:5. 【0110】 CI Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 20, 24, 31, 32, 34, 35, 35:1, 36, 36:1, 37, 37:1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 86, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 1 20, 123, 125, 126, 127, 128, 129, 137, 138, 147, 148, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180, 181, 182, 185, 187, 188, 193, 194, 198, 199, 213, 214, 218, 219, 220, 221, 231, 233. 【0111】 For example, the dyes used to color the second ink layer 37 yellow include oil-soluble dyes, acid dyes, basic dyes, metal-containing dyes, and various salt-forming types of these dyes, as well as the following yellow dyes. These yellow dyes can be used individually or in combination of two or more types. 【0112】 CI Acid Yellow 2, 3, 4, 5, 6, 7, 8, 9, 9:1, 10, 11, 11:1, 12, 13, 14, 15, 16, 17, 17:1, 18, 20, 21, 22, 23, 25, 26, 27, 29, 30, 31, 33, 34, 36, 38, 39, 40, 40:1, 41, 42, 42:1, 43, 44, 46, 48, 51, 53, 55, 56, 60, 63, 65, 66, 67, 68, 69, 72, 76, 82, 83, 84, 86, 87, 90, 94, 105, 115, 117, 122, 127, 131, 132, 136, 141, 142, 143, 144, 145, 146, 149, 153, 159, 166, 168, 169, 172, 174, 175, 178, 180, 183, 187, 188, 189, 190, 191, 192, 199. 【0113】 For example, the various yellow pigments mentioned above can be used as pigments to color the second ink layer 37 yellow. These yellow pigments can be used individually or in combination of two or more types. 【0114】 As a pigment to make the first ink layer 36 blue-violet as a complementary color to the second ink layer 37 (yellow), the following mixtures of blue pigments and the aforementioned purple pigments can be used. These blue and purple pigments can be used individually or in combination of two or more. The mixing ratio of blue pigment to purple pigment may also be 5:5. 【0115】 CI Bigment Blue 15:3, 15:4, 15:6. 【0116】 For example, the dyes used to color the second ink layer 37 orange include oil-soluble dyes, acid dyes, basic dyes, metal-containing dyes, and various salt-forming types of these dyes, as well as the following various orange dyes. These orange dyes can be used individually or in combination of two or more types. 【0117】 CI Acid Orange 1, 1:1, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 17, 18, 19, 20, 20:1, 22, 23, 24, 24:1, 25, 27, 28, 28:1, 30, 31, 33, 35, 36, 37, 38, 41, 45, 49, 50, 51, 54, 55, 56, 59, 79, 83, 94, 95, 102, 106, 116, 117, 119, 128, 131, 132, 134, 136, 138. 【0118】 For example, the following various orange pigments can be used to color the second ink layer 37 orange. These orange pigments can be used individually or in combination of two or more. CI Pigment Orange shades 36, 38, 43, 51, 55, 59, 61, 71, and 73. 【0119】 As a pigment to make the first ink layer 36 blue as a complementary color to the second ink layer 37 (orange), the aforementioned blue pigment can be mentioned. 【0120】 The adhesive tape 76 includes a base layer 61, a first adhesive layer 62, a second adhesive layer 63, and a release layer 64. The first adhesive layer 62 is formed on the adhesive surface 65 of the base layer 61, and the second adhesive layer 63 is formed on the release surface 66 opposite to the adhesive surface 65. The adhesive tape 76 is attached to the printed material 56 via the first adhesive layer 62. (6) Base material layer 61 Examples of the base layer 61 include resin films such as polysulfone, polystyrene, polyamide, polyimide, polycarbonate, polypropylene, polyester, and triacetate; thin papers such as condenser paper and glassine paper; and cellophane. Of these, polyester films such as polyethylene terephthalate (PET) and polyethylene naphthalate are preferred from the viewpoint of mechanical strength, dimensional stability, heat treatment resistance, and cost. The thickness of the base layer 61 can be arbitrarily set according to the specifications of the thermal transfer printer, for example. For example, the thickness of the base layer 61 is 1 μm or more, preferably 10 μm or more. For example, the thickness of the base layer 61 is 100 μm or less, preferably 50 μm or less. For example, the thickness of the base layer 61 is 1 μm or more and 100 μm or less, preferably 10 μm or more and 50 μm or less. (7) First adhesive layer 62 The first adhesive layer 62 is not particularly limited as long as it is an adhesive layer used for bonding films together, and examples include acrylic adhesives and rubber adhesives. The thickness of the first adhesive layer 62 is, for example, 1 μm or more, preferably 10 μm or more. For example, the thickness of the first adhesive layer 62 is 100 μm or less, preferably 50 μm or less. For example, the thickness of the first adhesive layer 62 is 1 μm or more and 100 μm or less, preferably 10 μm or more and 50 μm or less. (8) Second adhesive layer 63 The second adhesive layer 63 is not particularly limited as long as it is an adhesive layer used for bonding films together, and for example, the adhesive material used for the first adhesive layer 62 can be used. The thickness of the second adhesive layer 63 is, for example, 1 μm or more, preferably 10 μm or more. For example, the thickness of the second adhesive layer 63 is 100 μm or less, preferably 50 μm or less. For example, the thickness of the second adhesive layer 63 is 1 μm or more and 100 μm or less, preferably 10 μm or more and 50 μm or less. (9) Peeling layer 64 The release layer 64 is peeled off from the adhesive tape 76 when the transferred tape 55 is attached to the object, exposing the second adhesive layer 63. The transferred tape 55 can then be attached to the object via the exposed second adhesive layer 63. Examples of the release layer 64 include release paper coated with a release agent such as silicone. 【0121】 As shown in Figures 5C and 5D, the bonding tape 76 does not necessarily have to include a base layer 61. According to the transferred tape 55 having the above layer configuration, the second ink layer 37 has light-transmitting properties that allow the first ink layer 36 to be seen. This makes it possible to form a film in which the laminate of the first ink layer 36 and the second ink layer 37 is transferred to a transparent printer tape 2 such that the second ink layer 37 becomes the surface-side ink layer (observation-side ink layer). Since the second ink layer 37 has light-transmitting properties that allow the first ink layer 36 to be seen, the color of the first ink layer 36 can be recognized through the second ink layer 37 in this transferred tape 55. Furthermore, the second ink layer 37 has a complementary color relationship with the first ink layer 36. Therefore, even when the first ink layer 36 is covered with the second ink layer 37, the color of the first ink layer 36 seen through the second ink layer 37 can be brought closer to an ideal color (in this embodiment, black or a near-black achromatic color). 【0122】 The embodiments described herein are illustrative in all respects and should not be construed restrictively, and are intended to be modified in all respects. 【0123】 The following features can be extracted from the description in this specification and drawings. 【0124】 [Note 1-1] A thermal transfer recording medium that is transferred onto a transparent film, A base layer and The material includes a first ink layer and a second ink layer laminated sequentially on the substrate layer, A thermal transfer recording medium wherein the second ink layer has light-transmitting properties that allow the first ink layer to be visible, and has a complementary color relationship with the first ink layer. 【0125】 [Appendix 1-2] The thermal transfer recording medium according to Appendix 1-1, wherein the L value of the color difference of the reflected light from the second ink layer is 20 or less. 【0126】 [Appendix 1-3] The second ink layer is a thermal transfer recording medium according to Appendix 1-1 or Appendix 1-2, comprising 50% by mass or more of dye as a colorant. 【0127】 [Appendix 1-4] The first ink layer comprises a thermoplastic resin and an adhesive, as described in any one of the appendices 1-1 to 1-3. 【0128】 [Appendix 1-5] The second ink layer comprises a thermoplastic resin and wax, and is a thermal transfer recording medium according to any one of the appendices 1-1 to 1-4. 【0129】 [Appendix 1-6] A thermal transfer recording medium according to any one of the appendices 1-1 to 1-5, further comprising an intermediate layer formed between the first ink layer and the second ink layer. 【0130】 [Appendix 1-7] The thermal transfer recording medium according to Appendix 1-6, wherein the intermediate layer comprises a styrene-based thermoplastic elastomer. 【0131】 [Appendix 1-8] A transferred film is formed in which a first ink layer, a second ink layer having light-transmitting properties that allow the first ink layer to be seen, and a transparent film are laminated in this order. A transferred film in which the second ink layer has a complementary color relationship with respect to the first ink layer. 【0132】 [Appendix 1-9] A printed material comprising the transparent film, the first ink layer and the second ink layer laminate, A transferred film according to Appendix 1-8, comprising a first adhesive layer laminated on the printed material on the first ink layer side, and a lamination layer including the base material layer attached to the printed material via the first adhesive layer. 【0133】 [Appendix 1-10] The transferred film according to Appendix 1-9, wherein the lamination layer further comprises a second adhesive layer laminated on the substrate layer on the opposite side of the first adhesive layer, and a release layer laminated on the substrate layer via the second adhesive layer. 【0134】 [Appendix 1-11] A thermal transfer recording medium having a substrate layer and a laminate of a first ink layer and a second ink layer sequentially laminated on the substrate layer, wherein the second ink layer is translucent enough to allow the first ink layer to be seen, and the second ink layer is complementary in color to the first ink layer, the thermal transfer recording medium is heated in a heating step of heating the second ink layer in contact with a transparent film, A cooling step for cooling the thermal transfer recording medium that has been heated by the heating step, A method for manufacturing a transferred film, comprising a transfer step of transferring a transfer layer, which includes at least a laminate of the first ink layer and the second ink layer, onto a transparent film by applying an external force to the substrate layer and the first ink layer of the thermal transfer recording medium, which have been cooled by the cooling step, in a direction away from each other. 【0135】 [Appendix 1-12] In the heating step, the first portion of the thermal transfer recording medium is heated by applying a relatively low first energy, and the second portion of the thermal transfer recording medium is heated by applying a second energy that is relatively higher than the first energy. The method for manufacturing a transferred film according to Appendix 1-11, wherein in the transfer step, the laminate of the first ink layer and the second ink layer is transferred to the transparent film in a first portion of the thermal transfer recording medium, and the second ink layer is selectively transferred to the transparent film in a second portion of the thermal transfer recording medium. [Examples] 【0136】 The present disclosure will be further explained below based on experimental examples, but the configuration of the present disclosure is not limited to these examples. 【0137】 [Painting material for green colored layer (1)] A green coloring layer coating material (1) with a solid content of 22.5% by mass was prepared by dissolving 100 parts by mass of epoxy resin: JER1007 manufactured by Mitsubishi Chemical Corporation [basic solid type, softening point (ring-sphere method): 128℃, number average molecular weight Mn: approximately 2900], 200 parts by mass of acrylic adhesive: AS-665 manufactured by Lion Specialty Chemicals Co., Ltd. [solid content concentration: 40% by mass], 28.3 parts by mass of terpene phenol resin: YS Polystar T80 manufactured by Yasuhara Chemical Co., Ltd. (softening point: 80±5℃), and 166.7 parts by mass of green coloring agent [green pigment FASTOGEN® GREEN 5740 (CI Pigment Green 7) manufactured by DIC Corporation] in a mixed solvent of toluene and methyl ethyl ketone (MEK) in a mass ratio of 1 / 4. The proportion of the active ingredient in the acrylic adhesive was 80 parts by mass per 100 parts by mass of epoxy resin. 【0138】 [Coating material for green colored layer (2)] Green colored layer coating material (2) was prepared in the same manner as green colored layer coating material (1), except that an acrylic adhesive and tackifier were not included. 【0139】 [Coating material for yellow-green colored layer (1)] A yellow-green colored layer coating material (1) was prepared in the same manner as the green colored layer coating material (1), except that a mixture of a green pigment [FASTOGEN® GREEN 5740 (CI Pigment Green 7) manufactured by DIC Corporation] and a yellow pigment [SYMULER® FAST YELLOWGF CONC-P (CI Pigment Yellow 12) manufactured by DIC Corporation] was added as a green coloring agent (mixing ratio = green pigment 5: yellow pigment 5). The solid content concentration was 28% by mass. 【0140】 Table 1 summarizes the material names and mixing ratios of the green colored layer coating materials (1) and (2) and the yellow-green colored layer coating material (1) used as green colored layer coating materials. 【0141】 [Table 1] 【0142】 [Coating material for intermediate layer (1)] A thermoplastic elastomer [ToughTec H1521, SEBS, MFR: 12.3 g / 10 min, styrene content 18% by mass, manufactured by Asahi Kasei Corporation] was dissolved in a mixed solvent of toluene and hexane in a 1:1 mass ratio to prepare an intermediate layer coating material (1) with a solid content concentration of 10% by mass. 【0143】 [Coating material for intermediate layer (2)] Intermediate layer coating material (2) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of ToughTec H1517 [SEBS, MFR: less than 3.0 g / 10 min, styrene content 43% by mass] manufactured by Asahi Kasei Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0144】 [Coating material for intermediate layer (3)] Intermediate layer coating material (3) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of ToughTec H1272 [SEBS, MFR: No Flow, styrene content 35% by mass] manufactured by Asahi Kasei Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0145】 [Coating material for intermediate layer (4)] Intermediate layer coating material (4) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of Toughprene A [SBS, MFR: 2.6 g / 10 min, styrene content 40% by mass] manufactured by Asahi Kasei Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0146】 [Coating material for intermediate layer (5)] Intermediate layer coating material (5) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of UltraSen 634 [EVA, MFR: 4.3 g / 10 min] manufactured by Tosoh Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0147】 [Coating material for intermediate layer (6)] Intermediate layer coating material (6) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of UltraSen 722 [EVA, MFR: 400g / 10min] manufactured by Tosoh Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0148】 [Coating material for intermediate layer (7)] Intermediate layer coating material (7) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of UltraSen 725 [EVA, MFR: 1000g / 10min] manufactured by Tosoh Corporation was added as a thermoplastic elastomer. The solid content concentration was 10% by mass. 【0149】 [Coating material for intermediate layer (8)] Intermediate layer coating material (8) was prepared in the same manner as intermediate layer coating material (1), except that the same amount of amorphous polyester resin [Byron® 200 manufactured by Toyobo Co., Ltd.], which is a thermoplastic resin, was added instead of the thermoplastic elastomer. The solid content concentration was 10% by mass. 【0150】 Table 2 below summarizes the material names, MFRs, and styrene content of the intermediate layer coating materials (1) to (8). The mixing ratio of the constituent components is omitted as the solids / toluene / hexane ratio is 10 / 45 / 45 for all of the intermediate layer coating materials (1) to (8). 【0151】 [Table 2] 【0152】 [Coating material for red colored layer (1)] A coating material (1) for a red colored layer with a solid content of 28% by mass was prepared by dissolving 100 parts by mass of epoxy resin [JER1004 manufactured by Mitsubishi Chemical Corporation (basic solid type, softening point (ring-sphere method): 97°C, number average molecular weight Mn: approximately 1650)], 7.1 parts by mass of low-melting-point wax [Carnauba wax No. 2 powder manufactured by Toyo Chem Co., Ltd. (melting point: 80-86°C)], and 92.9 parts by mass of red coloring agent [Red dye VALIFAST RED1320 manufactured by Orient Chemical Industry Co., Ltd. (CI BASIC RED 1 and onium salt of azo dye)] in a mixed solvent of toluene and MEK in a mass ratio of 1 / 4. 【0153】 [Coating material for red colored layer (2)] Red-colored coating material (2) was prepared in the same manner as red-colored coating material (1), except that it contained a mixture of red dye [VALIFAST RED1320 (CI BASIC RED 1 and onium salt of azo dye) manufactured by Orient Chemical Industry Co., Ltd.] and red pigment [SYMULER® LAKE RED C CONC210 (CI Pigment Red 53:1) manufactured by DIC Corporation] as a red coloring agent (mixing ratio = red dye 7: red pigment 3). The solid content concentration was 28% by mass. 【0154】 [Coating material for red colored layer (3)] A red-colored coating material (3) was prepared in the same manner as the red-colored coating material (1), except that it contained a mixture of a red dye [VALIFAST RED1320 (CI BASIC RED 1 and onium salt of azo dye) manufactured by Orient Chemical Industry Co., Ltd.] and a red pigment [SYMULER® LAKE RED C CONC210 (CI Pigment Red 53:1) manufactured by DIC Corporation] (mixing ratio = red dye 5: red pigment 5). The solid content concentration was 28% by mass. 【0155】 [Coating material for purple colored layer (1)] A purple-colored layer coating material (1) was prepared in the same manner as the red-colored layer coating material (1), except that a purple dye [VALIFAST VIOLET 1704 (a mixture of CI BASIC VIOLET 1 and CI Acid Yellow 36) manufactured by Orient Chemical Industry Co., Ltd.] was added alone as a red-coloring agent. The solid content concentration was 28% by mass. 【0156】 The names of the materials and mixing ratios for the red-colored layer coating materials (1) to (3) and the purple-colored layer coating material (1), which are used as coating materials for red-colored layers, are summarized in Table 3 below. 【0157】 [Table 3] 【0158】 [Experimental Examples 1-16] (1) Manufacturing of ink ribbons (thermal transfer recording media) First, a PET film with a thickness of 4.5 μm was prepared as the base layer. Next, on the side of the base layer opposite to the surface where the transfer layer is formed (the back side), a silicone-based resin with a solid content of 0.1 g / m² per unit area was applied. 2 The back layer was formed. Next, one of the previously prepared green colored coating materials was applied to the surface of the base layer and then dried until the solid content per unit area was 1.5 g / m². 2 A green-colored layer was formed. Next, one of the previously prepared intermediate layer coating materials was applied to the green-colored layer and then dried until the solid content per unit area was 1 g / m².2 An intermediate layer was formed (except for Experimental Example 2). Next, one of the previously prepared red-colored coating materials was applied to the intermediate layer and then dried until the solid content per unit area was 2.5 g / m². 2 A reddish colored layer was formed to produce an ink ribbon. The composition of each layer of the ink ribbons obtained in Experimental Examples 1 to 16 is shown in Tables 4 to 6 below. (2) Evaluation (2-1) Transmittance of the base film First, the total light transmittance of the transparent base film used to produce the transferred film was measured. Two types of base films were used. One was a glossy transparent PET film [Lumirror® #50-S10 manufactured by Toray Industries, Inc.], and the other was a matte transparent PET film [a film made by Toray Industries, Inc. that had been sandblasted]. In Tables 4-6, the former is shown as "PET" and the latter as "Matte PET". 【0159】 The transmittance of each substrate film was measured using a haze meter (NDH7000, manufactured by Nippon Denshoku Industries Co., Ltd.) after preparing evaluation samples by cutting the film into 30 mm squares. The results are shown in Tables 4-6. (2-2) Reflection density A 330 μm thick white PET sheet was laid out, and the ink ribbons produced in each experimental example were placed on top of it with the substrate layer facing downwards. Next, a light beam was incident from the side of the red-colored layer, and the reflectance density (L value) was measured. The reflectance density was measured using a reflectance colorimeter (Spectro Photometer NF777, manufactured by Nippon Denshoku Industries Ltd.). The results are shown in Tables 4-6. (2-3) Print transparency The ink ribbons produced in each experiment were slit into ribbons of a predetermined width, wound into rolls, and set in a thermal transfer printer (a prototype printer manufactured by Brother Industries, Ltd.). The main specifications of the thermal transfer printer are as follows: <Resolution> 300dpi line thermal head <Resistance of heating element> 1830Ω <Transfer load> 30N / 2inch <Conveying speed> 20 mm / sec <Peeling distance> 110mm Next, under ambient temperature conditions of 25°C, the energy value applied to the thermal head of the thermal transfer printer was set to 100 (low temperature), as pre-configured. Then, a solid 70mm square image was thermally transferred onto the surface of the transparent substrate film shown in Tables 4-6 at a printing speed of 5 inches / sec. As a result, a transferred film was obtained in which a laminate of red and green colored layers was formed as the transfer layer, with the red colored layer facing the substrate film side. 【0160】 Next, the print transmittance of the transferred film was evaluated. Print transmittance is an index for comparing the light transmittance of the red-colored layer covering the green-colored layer. The better the print transmittance, the more likely it is that the green-colored layer can be perceived as black or a near-black achromatic color when viewed through the transparent substrate film and the red-colored layer. Specifically, a 330 μm thick white PET sheet was laid down, and the transferred film was placed on top of it with the transparent substrate film facing upwards. Next, a light beam was incident from the transparent substrate film side, and the reflectance density (L value, a value, and b value) was measured. The reflectance density was measured using a reflectance colorimeter (Spectro Photometer NF777 manufactured by Nippon Denshoku Industries Ltd.). Print transmittance was evaluated according to the following criteria: The target values ​​for each reflectance density that can be perceived as black are L value ≤ 25, a value ≤ 17, and b value ≤ 7. The results are shown in Tables 4-6. ○: Black (L value, a value, and b value are all within the target range). △: Has a reddish tint but is recognizable as black (one or fewer L, a, and b values ​​are outside the target range). ×: Brown (Two or more items among L value, a value, and b value are outside the target range). (2-4) Printing stability The ink ribbons produced in each experimental example were slit into ribbons of a predetermined width, wound into rolls, and set in a thermal transfer printer with the same specifications as (2-3). Next, under ambient temperature of 25°C, the energy values ​​applied to the thermal head, which were pre-set in the thermal transfer printer, were set to three energy levels each on the low-temperature and high-temperature sides. Then, a solid image of 70 mm square was thermally transferred onto the surface of the transparent substrate film shown in Tables 4-6 at a printing speed of 5 inches / sec. 【0161】 Regarding the energy values ​​applied to the thermal head, the low-temperature side consisted of three stages: a reference value of 100, and surrounding values ​​of 90 and 110. This resulted in a transferred film in which a laminate of the red-colored layer and the green-colored layer was formed as a transfer layer, with the red-colored layer facing the substrate film side. On the other hand, the high-temperature side consisted of three stages: a reference value of 170, and surrounding values ​​of 160 and 180. This resulted in a transferred film in which the red-colored layer was selectively peeled from the substrate layer and formed as a transfer layer on the transparent substrate film. 【0162】 Next, the print stability of each transferred film was evaluated. Print stability is an indicator for comparing the breadth of the energy range required to form the desired transfer layer. A wider energy range indicates a more stable formation of the desired transfer layer, thus resulting in higher print stability. Specifically, solid images transferred at three energy levels—low and high—were compared, and print stability was evaluated according to the following criteria. The results are shown in Tables 4-6. 4: There is no change in any of the 3 stages, and the printable energy range is wide. 3: Turbidity or unprintability is present at any one energy level around the reference value. 2: Turbidity or unprintability is present in any two energy levels around the reference value. 1: Turbidity or unprintable is present in any three energy levels around the reference value. 0: Turbidity or unprintable material exists in either the reference energy value of 100 or 170. (2-5) Transmittance of the red-tinted layer The ink ribbons produced in each experimental example were slit into ribbons of a predetermined width, wound into rolls, and set in a thermal transfer printer with the same specifications as (2-3). Next, under ambient temperature of 25°C, the energy value applied to the thermal head, which was pre-set in the thermal transfer printer, was set to 170 (high temperature). Then, a solid image of 70 mm square was thermally transferred onto the surface of the transparent substrate film shown in Tables 4-6 at a printing speed of 5 inches / sec. As a result, a transferred film was obtained in which the red-colored layer was selectively peeled off from the substrate layer and formed as a transfer layer on the transparent substrate film. 【0163】 Next, each solid image was cut into 30mm squares to create evaluation samples, and the transmittance of the red-colored layer was measured. Transmittance was measured using a haze meter (NDH7000, manufactured by Nippon Denshoku Industries, Ltd.). Specifically, first, the total light transmittance (%) of the evaluation samples was measured. Similarly, the total light transmittance (%) of the blank (the unprinted portion of the transferred film) was measured. Then, the total light transmittance (%) of only the red-colored layer was calculated using the formula: Total light transmittance (%) of the evaluation sample / Total light transmittance (%) of the blank × 100. The results are shown in Tables 4-6. 【0164】 [Table 4] 【0165】 [Table 5] 【0166】 [Table 6] 【0167】 By comparing the L values ​​of the ink ribbons used in Experimental Examples 1-7 and 9-16, where there is a complementary color relationship between the red and green colored layers, with the L value of the ink ribbon used in Experimental Example 8, where there is no such complementary color relationship, it was found that if there is a complementary color relationship between the red and green colored layers, the L value of the color difference of the reflected light from the red colored layer side of the ink ribbon can be reduced to 20 or less, resulting in good print transparency in the transferred film. In other words, in the transferred films of Experimental Examples 1-7 and 9-16, when the green colored layer is viewed through the transparent base film and red colored layer, it can be perceived as black. Furthermore, from a comparison between Experimental Examples 1 and 3 and Experimental Example 4, it was found that if the L value is 15 or less, the color can be made to approach black more effectively. On the other hand, from a comparison between Experimental Example 4 and Experimental Example 6, it was found that even with the same L value, using a matte-finished transparent PET film as the base film can improve print transparency. 【0168】 Furthermore, it was found that print transparency could be improved by increasing the proportion of red dye in the red-colored layer. Comparing the transmittance of the red-colored layers in Experimental Example 1 (red dye:red pigment = 10:0), Experimental Example 3 (red dye:red pigment = 7:3), and Experimental Example 4 (red dye:red pigment = 5:5), it was found that the transmittance improved as the proportion of red dye increased. In particular, the transmittance of the red-colored layer in Experimental Example 1 was excellent. 【0169】 Next, a comparison between Experimental Example 1 and Experimental Example 2 revealed that interposing an intermediate layer between the green-colored layer and the red-colored layer resulted in superior print stability. In other words, the interposition of an intermediate layer reduced the likelihood of peeling and allowed for the recording of characters with superior clarity. Furthermore, from the viewpoint of print stability, a comparison between Experimental Examples 1 and 10-12 and Experimental Examples 13-16 revealed that styrene-based thermoplastic elastomers (SEBS, SBS) are preferred as the intermediate layer, with SEBS being particularly preferred. In addition, a comparison between Experimental Example 1 and Experimental Example 7 revealed that including an acrylic adhesive in the green-colored layer is preferable for improving print stability. [Explanation of Symbols] 【0170】 2: Printer tape 3: Ink ribbon 35: Base material layer 36: First ink layer 37: Second ink layer 42: 1st part 43:Second part 44: Print Pattern 45: Second color pattern 46: First color pattern 51: Middle Class 55: Pre-transferred tape 56: Printed matter 57: First transfer layer 58: Second transfer layer 61: Base material layer 62: 1st adhesive layer 63:Second adhesive layer 64: Exfoliation layer 76: Adhesive tape

Claims

[Claim 1] A thermal transfer recording medium that is transferred onto a transparent film, A base layer and The material includes a first ink layer and a second ink layer laminated sequentially on the substrate layer, The second ink layer has light-transmitting properties that allow the first ink layer to be visible, and has a complementary color relationship with the first ink layer. The second ink layer is a thermal transfer recording medium containing 50% by mass or more of dye as a colorant. [Claim 2] A thermal transfer recording medium that is transferred onto a transparent film, A base layer and A first ink layer and a second ink layer are sequentially laminated on the substrate layer, The intermediate layer formed between the first ink layer and the second ink layer is included. The second ink layer has light-transmitting properties that allow the first ink layer to be visible, and has a complementary color relationship with the first ink layer. The intermediate layer comprises at least one thermoplastic elastomer selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS), styrene-isoprene-styrene block copolymer (SIS), and ethylene-vinyl acetate copolymer (EVA), and is a thermal transfer recording medium. [Claim 3] The thermal transfer recording medium according to claim 1, wherein the L value of the color difference of the reflected light from the second ink layer is 20 or less. [Claim 4] The thermal transfer recording medium according to claim 2, wherein the second ink layer contains 50% by mass or more of dye as a colorant. [Claim 5] The thermal transfer recording medium according to claim 1, wherein the first ink layer comprises a thermoplastic resin and an adhesive. [Claim 6] The thermal transfer recording medium according to claim 1, wherein the second ink layer comprises a thermoplastic resin and a wax. [Claim 7] The thermal transfer recording medium according to any one of claims 1, 3, 5, and 6, further comprising an intermediate layer formed between the first ink layer and the second ink layer. [Claim 8] The thermal transfer recording medium according to claim 7, wherein the intermediate layer comprises a styrene-based thermoplastic elastomer. [Claim 9] A transferred film is formed in which a first ink layer, a second ink layer having light-transmitting properties that allow the first ink layer to be seen, and a transparent film are laminated in this order. The second ink layer has a complementary color relationship with the first ink layer. A printed material comprising the transparent film, the first ink layer and the second ink layer laminate, A transferred film comprising a first adhesive layer laminated on the printed material on the first ink layer side, and a lamination layer including a substrate layer attached to the printed material via the first adhesive layer. [Claim 10] The transferred film according to claim 9, wherein the lamination layer further comprises a second adhesive layer laminated on the substrate layer on the opposite side of the first adhesive layer, and a release layer laminated on the substrate layer via the second adhesive layer. [Claim 11] A thermal transfer recording medium having a substrate layer and a laminate of a first ink layer and a second ink layer sequentially laminated on the substrate layer, wherein the second ink layer is translucent enough to allow the first ink layer to be seen, and the second ink layer is complementary in color to the first ink layer, the thermal transfer recording medium is heated in a heating step of heating the second ink layer in contact with a transparent film, A cooling step for cooling the thermal transfer recording medium that has been heated by the heating step, The transfer step includes applying an external force to the substrate layer and the first ink layer of the thermal transfer recording medium, which have been cooled by the cooling step, in a direction away from each other, thereby transferring a transfer layer, which includes at least a laminate of the first ink layer and the second ink layer, to the transparent film. A method for manufacturing a transferred film, wherein the second ink layer contains 50% by mass or more of dye as a colorant. [Claim 12] A thermal transfer recording medium having a substrate layer and a laminate of a first ink layer, an intermediate layer, and a second ink layer sequentially laminated on the substrate layer, wherein the second ink layer is translucent enough to allow the first ink layer to be seen, and the second ink layer is complementary in color to the first ink layer, the thermal transfer recording medium is heated in a heating step of heating the second ink layer in contact with a transparent film, A cooling step for cooling the thermal transfer recording medium that has been heated by the heating step, The transfer step includes applying an external force to the substrate layer and the first ink layer of the thermal transfer recording medium, which have been cooled by the cooling step, in a direction away from each other, thereby transferring a transfer layer, which includes at least a laminate of the first ink layer and the second ink layer, to the transparent film. A method for producing a transferred film, wherein the intermediate layer comprises at least one thermoplastic elastomer selected from the group consisting of styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butene-styrene block copolymer (SEBS), styrene-ethylene-propylene-styrene block copolymer (SEPS), styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS), styrene-isoprene-styrene block copolymer (SIS), and ethylene-vinyl acetate copolymer (EVA). [Claim 13] In the heating step, the first portion of the thermal transfer recording medium is heated by applying a relatively low first energy, and the second portion of the thermal transfer recording medium is heated by applying a second energy that is relatively higher than the first energy. The method for manufacturing a transferred film according to claim 11 or 12, wherein in the transfer step, the laminate of the first ink layer and the second ink layer is transferred to the transparent film in a first portion of the thermal transfer recording medium, and the second ink layer is selectively transferred to the transparent film in a second portion of the thermal transfer recording medium.

Images