JP2019045835A - Multilayer printed matter and multilayer printing method - Google Patents

Abstract

To provide a multilayer printed matter and a multilayer printing method, which can improve a property of concealing a pattern on a light source side among a plurality of patterns from a front-surface side when no light is directed from a light source on a back-surface side.SOLUTION: Provided is a multilayer printed matter 10 in which a printing layer group 30 is formed on a medium 20. The printing layer group includes: a front layer 31 and a back layer 34 on which patterns are printed; a white layer 32 which is arranged between the front layer 31 and the back layer 34, for concealing the back layer 34 from the side of the front layer 31, and for viewing the front layer 31 from the side of the front layer 31 by reflecting light incoming from the side of the front layer 31; and a black layer 33 which is arranged between the white layer 32 and the back layer 34, for concealing the back layer 34 from the side of the front layer 31. The black layer 33, when compared with the white layer 32 in the same thickness, has higher shielding performance than the white layer 32.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a multilayer print and a multilayer printing method in which a printing layer group is formed on a medium.

  Conventionally, a transparent or translucent sheet having a pattern printed on both the front and back sides is known (see, for example, Patent Document 1). In the sheet described in Patent Document 1, when no light is applied from the light source on the back side in a state where light is applied from the front side, the pattern on the front side is mainly viewed from the front side. On the other hand, in the sheet described in Patent Document 1, when light is applied from the light source on the back surface in a state in which light from the front surface side is suppressed, light on which the design on the back surface is applied from the light source Thus, the design on the back side is more easily viewed from the front side as compared to the case where light is not applied from the light source on the back side.

JP, 2009-128734, A

  However, in the sheet described in Patent Document 1, even when light is not applied from the light source on the back side in a state where light is applied from the front side, the design on the back side is transparent to the front side Since it is visible, there is a problem that the design on the back side is viewed from the front side.

  Therefore, the present invention provides a multilayer printed matter and a multilayer printing method capable of improving the concealing property of the design on the light source side among the plurality of designs when light is not applied from the light source on the back side. The purpose is to

  The multilayer printed matter according to the present invention is disposed between the first symbol printing layer and the second symbol printing layer on which symbols are printed, and the first symbol printing layer and the second symbol printing layer, The second pattern print layer is concealed from the first pattern print layer side, and the light incident from the first pattern print layer side is reflected and the first pattern print layer side is reflected from the first pattern print layer side. A first concealment print layer for making the design print layer visible, and the first concealment print layer and the second design print layer are disposed relative to the first design print layer side A printing layer group including a second concealing printing layer for concealing the second pattern printing layer is formed on the medium, and the second concealing printing layer is the first concealing print When compared with the same thickness as the layer, it is characterized in that the light shielding performance is higher than the first concealing print layer.

  According to this configuration, the multilayer printed material of the present invention includes the concealed printing layer between the first symbol printing layer and the second symbol printing layer, so that light is applied from the first symbol printing layer side. When light is not emitted from the light source on the side opposite to the first symbol printing layer side with respect to the second symbol printing layer, the second symbol printing layer side with respect to the first symbol printing layer When it sees from the opposite side, concealment nature of the 2nd pattern printing layer can be improved. That is, the multilayer printed material of the present invention can improve the concealability of the design on the light source side among the plurality of designs when light is not applied from the light source on the back side. In the multilayer printed material of the present invention, when the first concealing print layer and the second concealing print layer are compared at the same thickness, the second concealing print layer is the first concealing print Since the light shielding performance is higher than that of the layer, the same shielding performance can be obtained even if the thickness of the entire concealed printing layer is reduced as compared with the case where the concealed printing layer is formed only with the first concealed printing layer. Can. That is, the multilayer printed material of the present invention can reduce the thickness of the entire concealed printing layer. Therefore, in the multilayer printed material of the present invention, light is emitted from the light source on the side opposite to the first symbol print layer side with respect to the second symbol print layer in a state in which the light hitting from the first symbol print layer side is suppressed. When the light from the light source is transmitted through the printing layer for concealment, the amount scattered by the printing layer for concealment can be suppressed, and as a result, the second pattern printing layer becomes the light source Can be clearly seen through to the first pattern printed layer side by the light from.

  In the multilayer printed matter of the present invention, the first concealment printing layer and the second concealment printing layer are the second one in a state in which the multilayer printed matter is irradiated with light from the first pattern printing layer side. The second symbol printing is performed on the first symbol printing layer when light is not applied to the multilayer printed product from the light source on the side opposite to the first symbol printing layer side with respect to the symbol printing layer. When the multilayer printed matter is viewed from the side opposite to the layer side, the light source is concealed in the second pattern printed layer, and the light source is in a state where light striking the multilayer printed matter from the first symbol printed layer side is suppressed. When the multilayer printed matter is viewed from the side opposite to the second pattern printed layer side with respect to the first symbol printed layer when light is applied to the multilayer printed matter from the The pattern printing layer is exposed to light from the light source. Wherein the make visible through the first pattern printed layer side.

  In the multilayer printed matter of the present invention, the second concealment print layer may be thinner than the first concealment print layer.

  With this configuration, the multilayer printed material of the present invention can reduce the amount of ink for printing the concealed printing layer when the concealed printing layer is printed with the ink.

  In the multilayer printed matter of the present invention, the second concealing print layer may be a black layer.

  With this configuration, the multilayer printed material of the present invention exhibits high light shielding performance even if the second concealing print layer is thin, so the thickness of the second concealing print layer can be reduced.

  In the multilayer printed matter of the present invention, the first concealing print layer may be a white layer.

  According to this configuration, the multilayer printed material of the present invention has a high lightness of the first concealing print layer, so the first printed pattern layer is exposed to light from the first pattern printed layer side to the second printed pattern layer. When light is not applied from the light source on the side opposite to the symbol printing layer side, the first symbol printing layer is visible from the side opposite to the second symbol printing layer side with respect to the first symbol printing layer When done, the lightness of the pattern represented by the first graphic print layer can be improved by the lightness of the first concealment print layer.

  In the multilayer printed matter of the present invention, at least one of the first concealment print layer and the second concealment print layer is partially absent in the laminating direction with respect to the first graphic print layer. Also good.

  With this configuration, the multilayer printed material according to the present invention is a light source on the side opposite to the first symbol printing layer side with respect to the second symbol printing layer in a state in which light hitting from the first symbol printing layer side is suppressed. Light from the light source is applied to an area where at least one of the first concealment print layer and the second concealment print layer is not present in the stacking direction with respect to the first symbol print layer, Since it is easy to transmit, light is applied from the light source on the side opposite to the first pattern print layer side with respect to the second pattern print layer in a state in which light hitting from the first pattern print layer side is suppressed And, when viewed from the side opposite to the second symbol print layer side with respect to the first symbol print layer, at least one of the first concealment print layer and the second concealment print layer is the first An area which does not exist in the stacking direction can be highlighted with respect to one symbol printing layer.

  In the multilayer printing method of the present invention, the first symbol printing layer and the second symbol printing layer on which symbols are printed, and the first symbol printing layer and the second symbol printing layer are disposed between the first symbol printing layer and the second symbol printing layer. The second symbol print layer is concealed from the first symbol print layer side, and the light incident from the first symbol print layer side is reflected to the first symbol print layer side. A first concealing printing layer for visualizing the first pattern printing layer, and the first concealing printing layer and the second pattern printing layer disposed on the side of the first pattern printing layer Forming a printing layer group including a second concealing printing layer for concealing the second pattern printing layer on the medium, and the second concealing printing layer is the first concealing printing layer And the light shielding performance is higher than that of the first concealing print layer.

  According to this configuration, the multilayer printed matter produced by the multilayer printing method of the present invention includes the concealed printing layer between the first symbol printing layer and the second symbol printing layer, so from the first symbol printing layer side When light is not emitted from the light source on the side opposite to the first symbol printing layer side with respect to the second symbol printing layer in a state where light is applied, the second symbol to the first symbol printing layer When it is viewed from the side opposite to the symbol printed layer side, the concealability of the second symbol printed layer can be improved. That is, in the multilayer printed material manufactured by the multilayer printing method of the present invention, the shielding property of the design on the light source side among the plurality of designs is improved with respect to the front side when light is not applied from the light source on the back side. Can. In the multilayer printed material produced by the multilayer printing method of the present invention, when the first concealing printing layer and the second concealing printing layer are compared at the same thickness, the second concealing printing layer is produced. Since the light shielding performance is higher than that of the first concealing printing layer, the thickness of the entire concealing printing layer may be reduced as compared to the case where the concealing printing layer is formed only with the first concealing printing layer, The same concealment performance can be obtained. That is, the multilayer printed material produced by the multilayer printing method of the present invention can reduce the thickness of the entire concealed printing layer. Therefore, the multilayer printed material manufactured by the multilayer printing method of the present invention is the first symbol printed layer side with respect to the second symbol printed layer in a state in which light hitting from the first symbol printed layer side is suppressed. Can reduce the amount of light scattered from the light source when it is transmitted from the light source when it is transmitted from the light source from the light source on the opposite side, as a result. The two pattern print layers can be clearly seen through to the first pattern print layer side by the light from the light source.

  In the multilayer printing method according to the present invention, the printing layer group forms a first head as an ink jet head for discharging an ink for forming the first symbol printing layer, and the first concealed printing layer. Head as an ink jet head for discharging ink for printing, a third head as an ink jet head for discharging ink for forming the second concealing printing layer, and the second pattern printing layer The first head, the second head, the third head, and the fourth head are formed by an ink jet printer including a fourth head as an ink jet head that discharges an ink for forming the ink. The first head, the second head, the third head, and the fourth head are directed from upstream to downstream in a specific direction. Of the first head, the second head, the third head and the fourth head, and one of the medium and the specific direction. The printing layer group may be formed by relatively moving in only one of the directions opposite to the specific direction.

  According to this configuration, the multilayer printing method of the present invention can move the medium relative to the ink jet head only in one of the specific direction and the direction opposite to the specific direction. Since four layers of the pattern print layer, the second pattern print layer, the first concealment print layer, and the second concealment print layer can be simultaneously printed, the method of printing each print layer sequentially in the entire area As compared with the above, the positional accuracy between the respective printing layers can be improved, and a high quality multilayer printed matter can be manufactured.

  In the multilayer printing method according to the present invention, one of the first head, the second head, the third head and the fourth head, and the medium is moved relative to the other in the main scanning direction. Ink is ejected toward the medium by the first head, the second head, the third head and the fourth head, and the first head, the second head, the second head In the third head and the fourth head, the lengths of the discharge areas in the sub-scanning direction orthogonal to the main scanning direction are the same, and the heads are arranged shifted by the length of the discharge area in the sub-scanning direction And the specific direction is any one of the sub-scanning directions, and the main direction by the first head, the second head, the third head and the fourth head In the scan direction Every time printing is completed, the medium is moved relative to the first head, the second head, the third head and the fourth head by the length of the discharge area in the sub-scanning direction, It may be relatively moved in a specific one of the sub-scanning directions.

  According to this configuration, the multilayer printing method according to the present invention can move the medium relative to the ink jet head in a specific one direction in the sub-scanning direction, so as to form the first graphic print layer, the second graphic print layer, and the first graphic print layer. Since it is possible to simultaneously print four layers of the concealed print layer and the second concealed print layer, the positional accuracy between the respective print layers is improved as compared with the method of printing the respective print layers in order by whole area. Can produce high quality multi-layered prints.

  The multilayer printed matter and the multilayer printing method of the present invention can improve the concealability of the design on the light source side among the plurality of designs when no light is applied from the light source on the back side.

It is a top view of the multilayer printed matter which concerns on one embodiment of this invention. It is a side view of the multilayer printed matter shown in FIG. (A) It is a top view of the surface layer shown in FIG. (B) It is a top view of the white layer shown in FIG. (A) It is a top view of the black layer shown in FIG. (B) It is a top view of the back layer shown in FIG. It is a side view of a display provided with the multilayer printed matter shown in FIG. It is a top view of a multilayer printed matter in case light is irradiated from the light source shown in FIG. 5 in the state by which the light which hits from the surface side is suppressed. It is a block diagram of the manufacturing system of the multilayer printed matter shown in FIG. It is a block diagram of a computer shown in FIG. It is a flowchart of the manufacturing method of the multilayer printed matter shown in FIG. It is a figure which shows an example of the preview screen performed by the preview execution means shown in FIG. It is a figure which shows an example of the preview screen shown in FIG. 10 in the state by which the check box was checked. It is a side view of a display provided with a multilayer printed matter different from the multilayer printed matter shown in FIG. It is a figure which shows an example of the printing method of surface layer, a white layer, a black layer, and a back layer by the inkjet printer shown in FIG. It is a figure which shows an example different from the example shown in FIG. 13 of the printing method of surface layer, a white layer, a black layer, and a back layer by the inkjet printer shown in FIG. It is a figure which shows an example different from the example shown in FIG.13 and FIG.14 of the printing method of surface layer, a white layer, a black layer, and a back layer by the inkjet printer shown in FIG. When printing and a cut are performed by the inkjet printer shown in FIG. 7, it is a flowchart of the manufacturing method of a multilayer printed matter when a registration mark is not utilized. FIG. 8 is a flow chart of a method of producing a multilayer printed matter when registration marks are used when printing and cutting are performed by the inkjet printer shown in FIG. 7. When printing is performed by the inkjet printer shown in FIG. 7, when cutting is performed by a cutting plotter different from an inkjet printer, it is a flowchart of the manufacturing method of a multilayer printed matter when a registration mark is not utilized. FIG. 8 is a flow chart of a method of producing a multilayer printed matter when registration marks are used when printing is performed by the inkjet printer shown in FIG. 7 and cutting is performed by a cutting plotter different from the inkjet printer.

  Hereinafter, an embodiment of the present invention will be described using the drawings.

  First, the structure of the multilayer printed matter according to the present embodiment will be described.

  FIG. 1 is a plan view of a multilayer printed material 10 according to the present embodiment. FIG. 2 is a side view of the multilayer printed matter 10.

  As shown in FIGS. 1 and 2, the multilayer printed article 10 includes a medium 20 and a printing layer group 30 formed on the medium 20.

  The medium 20 may be, for example, a transparent medium but may be an opaque medium.

  The print layer group 30 includes a surface layer 31, a white layer (hereinafter referred to as “white layer”) 32, a black layer (hereinafter referred to as “black layer”) 33, and a back layer 34.

  FIG. 3A is a plan view of the surface layer 31. FIG. FIG. 3 (b) is a plan view of the white layer 32. FIG. 4A is a plan view of the black layer 33. FIG. FIG. 4 (b) is a plan view of the back layer 34.

  The surface layer 31 represents a symbol as shown in FIG. 3A, and constitutes a first symbol printed layer of the present invention.

  As shown in FIG. 2, the white layer 32 shown in FIG. 3B is disposed between the surface layer 31 and the back layer 34 and conceals the back layer 34 with respect to the surface layer 31 and is incident from the surface layer 31 side. The light thus reflected is reflected to make the surface layer 31 visible from the surface layer 31 side, and constitute the first concealing print layer of the present invention. The white layer 32 is printed with white ink. The white layer 32 is printed at, for example, 200% when the case where the white ink lands on all the pixels to be printed on the medium 20 is 100%.

  As shown in FIG. 2, the black layer 33 shown in FIG. 4 (a) is disposed between the white layer 32 and the back layer 34 to conceal the back layer 34 from the surface layer 31 side. The second concealing print layer is configured. Since the black layer 33 is printed with black ink, the light shielding performance is high compared to the white layer 32 printed with white ink. As shown in FIG. 2, the black layer 33 includes a portion 33 a which does not exist in the stacking direction indicated by the arrow 10 a with respect to the surface layer 31. The black layer 33 is printed at, for example, 30% to 70%, where 100% is the case where the black ink lands on all the pixels to be printed on the medium 20. The black layer 33 has higher light shielding performance than the white layer 32 when compared with the white layer 32 at the same thickness.

  The back layer 34 represents a pattern as shown in FIG. 4 (b), and constitutes a second pattern printed layer of the present invention.

  Next, the configuration of the display device provided with the multilayer printed matter 10 will be described.

  FIG. 5 is a side view of the display device 40 provided with the multilayer printed matter 10.

  As shown in FIG. 5, the display device 40 includes the multilayer printed matter 10 and the light source 50 disposed on the side opposite to the surface layer 31 side with respect to the back layer 34 of the multilayer printed matter 10.

  In the display device 40, the multilayer printed product 10 is viewed by the user 60 from the side opposite to the back layer 34 side with respect to the surface layer 31 of the multilayer printed material 10.

  Next, the operation of the display device 40 will be described.

  In the multilayer printed matter 10, when light is not applied from the light source 50 on the back layer 34 in a state where light is applied from the surface 31 side, as shown in FIG. Ru.

  FIG. 6 is a plan view of the multilayer printed matter 10 in the case where light is applied from the light source 50 on the back layer 34 side in a state in which light hitting from the surface layer 31 side is suppressed.

  When light is applied from the light source 50 on the back layer 34 side in a state where light hitting from the surface layer 31 side is suppressed, the design of the back layer 34 is from the light source 50 as shown in FIG. Since it is seen through the surface layer 31 by the applied light, the user 60 visually recognizes the pattern in which the pattern of the surface layer 31 and the pattern of the back layer 34 are combined.

  Next, the configuration of the manufacturing system of the multilayer printed matter 10 will be described.

  FIG. 7 is a block diagram of a manufacturing system 70 of the multilayer printed matter 10.

  As shown in FIG. 7, the manufacturing system 70 includes an inkjet printer 80 that executes printing on the medium 20 (see FIG. 2), and a computer 90 such as a PC (Personal Computer) that sends print data to the inkjet printer 80. Have.

  The ink jet printer 80 may be, for example, UCJV-300 manufactured by MIMAKI ENGINEERING CO., LTD., Which can execute printing on the rolled medium 20, or may be another ink jet printer.

  FIG. 8 is a block diagram of the computer 90.

  As shown in FIG. 8, the computer 90 is a display device such as an LCD (Liquid Crystal Display) which displays various information and an operation unit 91 which is an input device such as a keyboard and a mouse to which various operations are input. A display unit 92, a communication unit 93 which is a communication device for communicating with an external device directly via a network such as a LAN (Local Area Network) or wired or wireless without a network, A storage unit 94, which is a non-volatile storage device such as a semiconductor memory for storing information and a hard disk drive (HDD), and a control unit 95 for controlling the entire computer 90 are provided.

  The storage unit 94 stores an image data generation program 94a for generating image data, a preview execution program 94b for executing preview of a multilayer printed matter, and a print data generation program 94c for generating print data. ing. The image data generation program 94a, the preview execution program 94b, and the print data generation program 94c may be installed on the computer 90 at the manufacturing stage of the computer 90, respectively, or may be a USB (Universal Serial Bus) memory or a CD (Compact Disk). The program may be additionally installed in the computer 90 from an external storage medium such as a DVD (Digital Versatile Disk), or may be additionally installed in the computer 90 from the network.

  The control unit 95 includes, for example, a central processing unit (CPU), a read only memory (ROM) storing programs and various data in advance, and a random access memory (RAM) used as a work area of the CPU. ing. The CPU is configured to execute a program stored in the ROM or the storage unit 94.

  The control unit 95 implements an image data generation unit 95a that generates image data of each of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 by executing the image data generation program 94a. The control unit 95 executes the preview execution program 94 b to realize the preview execution unit 95 b that executes the preview of the multilayer printed matter to be printed based on the image data generated by the image data generation unit 95 a. The control unit 95 realizes the print data generation unit 95c that generates print data based on the image data generated by the image data generation unit 95a by executing the print data generation program 94c.

  Next, a method of manufacturing the multilayer printed matter 10, that is, a multilayer printing method will be described.

  FIG. 9 is a flowchart of a method of manufacturing the multilayer printed matter 10.

  As shown in FIG. 9, the operator causes the computer 90 to execute the image data generation program 94 a to generate image data of the surface layer 31, the white layer 32, the black layer 33 and the back layer 34 from the operation unit 91. It instructs (S101). Therefore, the image data generation unit 95 a generates image data of each of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 in response to an instruction via the operation unit 91.

  After the process of S101, the operator causes the computer 90 to execute the preview execution program 94b and instructs the operation section 91 to execute the preview of the multilayer printed matter to be printed based on the image data generated in S101 (S102). ). Therefore, the preview executing unit 95b executes the preview of the multilayer printed matter to be printed based on the image data generated in S101.

  FIG. 10 is a diagram showing an example of the preview screen 110 executed by the preview execution unit 95b.

  The preview screen 110 shown in FIG. 10 has a preview area 111 in which a preview of the multilayer printed matter to be printed based on the image data is displayed, and a display device 40 where the multilayer printed matter printed based on the image data is shown in FIG. And a check box 112 for selecting whether or not to display a preview of the multilayer print when light is emitted from the light source 50.

  The preview screen 110 shown in FIG. 10 is the preview screen 110 in a state where the check box 112 is not checked. Therefore, in the preview area 111 shown in FIG. 10, a preview of a multilayer printed material in the case where light is not applied from the light source 50 on the back layer 34 in a state where light is applied from the surface layer 31 side is displayed.

  FIG. 11 is a diagram showing an example of the preview screen 110 in a state where the check box 112 is checked.

  The preview screen 110 shown in FIG. 11 is the preview screen 110 in a state where the check box 112 is checked. Therefore, in the preview area 111 shown in FIG. 11, a preview of the multilayer printed matter is displayed in the case where light is applied from the light source 50 on the back layer 34 in a state in which light from the surface layer 31 side is suppressed. .

  As shown in FIG. 9, as a result of the preview in S102, the worker determines whether it is necessary to correct the image data (S103).

  If the worker determines in S103 that the image data needs to be corrected, the worker executes the process of S101.

  If the operator determines in S103 that the image data does not need to be corrected, the operator causes the computer 90 to execute the print data generation program 94c, and instructs printing from the operation unit 91 based on the image data generated in S101 ( S104). Therefore, the print data generation unit 95c generates print data based on the image data generated in S101, and transmits the generated print data to the inkjet printer 80. When the inkjet printer 80 receives the print data transmitted from the computer 90, it forms the print layer group 30 on the medium 20 based on the received print data. That is, the inkjet printer 80 manufactures the multilayer printed matter 10 shown in FIG. 5 by sequentially printing the back layer 34, the black layer 33, the white layer 32, and the surface layer 31 on the medium 20.

  The inkjet printer 80 can also produce the multilayer printed matter 120 shown in FIG. 12 by sequentially printing the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 on the medium 20.

  FIG. 13 is a view showing an example of a printing method of the surface layer 31, the white layer 32, the black layer 33 and the back layer 34 by the ink jet printer 80. As shown in FIG.

  An ink jet printer 80 shown in FIG. 13 includes ink jet heads 81 to 86 that eject ink. The inkjet heads 81 to 86 are inkjet heads for a serial head system. The colors of the ink ejected by the inkjet heads 81 to 86 are cyan, magenta, yellow, black (black), white (white), and white (white), respectively.

  The surface layer 31 and the back layer 34 are mainly printed by the ink ejected by the ink jet heads 81 to 84. The white layer 32 is printed by the ink ejected by the inkjet heads 85 and 86. The black layer 33 is printed by the ink ejected by the inkjet head 84.

  The ink jet heads 81 to 86 are mounted on the carriage 87 and moved relative to the medium 20 by moving the carriage 87 relative to the medium 20.

  The ink jet printer 80 shown in FIG. 13 is an ink directed to the medium 20 by the ink jet heads 81 to 86 when moving the other relative to one of the ink jet heads 81 to 86 and the medium 20 in the main scanning direction indicated by the arrow 80 a. Discharge the

  When the ink jet printer 80 shown in FIG. 13 discharges the ink toward the medium 20 by the ink jet heads 81 to 86, of the ink discharge areas of the ink jet heads 81 to 86, the arrow 80b is orthogonal to the main scanning direction. Print areas 81a, 82a, 83a, 84a, 85a and 86a, respectively, of the back layer 34 in order from the upstream side to the downstream side in the direction indicated by the arrow 80c in the sub scanning direction shown, black Print areas 81b, 82b, 83b, 84b, 85b and 86b of layer 33, print areas 81c, 82c, 83c, 84c, 85c and 86c of white layer 32, print areas 81d, 82d, of surface layer 31 83d, 84d, 85d and 86d.

  As described above, since the white layer 32 is printed by the ink ejected by the inkjet heads 85 and 86, the areas 81c, 82c, 83c and 84c are not actually used. Similarly, areas 81b, 82b, 83b, 85b and 86b are not actually used because the black layer 33 is printed by the ink ejected by the inkjet head 84.

  Regions 81d, 82d, 83d and 84d of the inkjet heads 81 to 84 constitute a first head of the present invention. Regions 85c and 86c of the inkjet heads 85 and 86 constitute a second head of the present invention. The area 84 b of the ink jet head 84 constitutes a third head of the present invention. Regions 81a, 82a, 83a and 84a of the ink jet heads 81 to 84 constitute a fourth head of the present invention. Regions 81d, 82d, 83d and 84d, regions 85c and 86c, region 84b, and regions 81a, 82a, 83a and 84a are in the direction opposite to the direction shown by arrow 80c, that is, from upstream to downstream in a specific direction Toward the, are arranged in this order.

  The ink jet printer 80 shown in FIG. 13 has the medium 20 for the ink jet heads 81 to 86 every time printing in the main scanning direction by the ink jet heads 81 to 86 is completed, for example, the length 80 d of the discharge area in the sub scanning direction. The multilayer printed matter 10 shown in FIG. 5 can be manufactured by relatively moving it in the direction shown by the arrow 80c by a length of 1/16 of the length.

  The inkjet printer 80 shown in FIG. 13 is 1/16 of the length 80d of the medium 20 with respect to the ink jet heads 81 to 86 every time printing in the main scanning direction by the ink jet heads 81 to 86 is completed. In the case of relative movement in the direction indicated by the arrow 80c, printing is performed four times in the main scanning direction by the ink jet heads 81 to 86 for any part of the surface layer 31, the white layer 32, the black layer 33 and That is, it will be completed in 4 passes. Therefore, the ink jet printer 80 shown in FIG. 13 completes the printing of any part of the multilayer printed matter 10 in 16 passes. However, the ink jet printer 80 shown in FIG. 13 adopts the number of passes other than 4 as the number of passes for completing printing of each of the surface layer 31, the white layer 32, the black layer 33 and the back layer 34. Also good.

  The ink jet printer 80 shown in FIG. 13 has the medium 20 for the ink jet heads 81 to 86 by, for example, a length of 1/16 of the length 80 d every time printing in the main scanning direction by the ink jet heads 81 to 86 is finished By relatively moving in the direction opposite to the direction shown by the arrow 80c, the multilayer printed matter 120 shown in FIG. 12 can be manufactured.

  FIG. 14 is a view showing an example of the printing method of the surface layer 31, the white layer 32, the black layer 33 and the back layer 34 by the ink jet printer 80, which is different from the example shown in FIG.

  The ink jet printer 80 shown in FIG. 14 includes ink jet heads 181 to 191 that eject ink. The inkjet heads 181 to 191 are inkjet heads for a serial head system. The colors of ink ejected by the inkjet heads 181 to 191 are cyan, magenta, yellow, black (black), black (black), white (white), white (white), cyan, magenta, yellow, black ( Black). The ink ejected by the inkjet heads 181 to 191 is a UV ink which is cured by being irradiated with ultraviolet light.

  The inkjet printer 80 shown in FIG. 14 includes an ultraviolet irradiation device 192 and an ultraviolet irradiation device 193 for irradiating the ink discharged by the inkjet heads 181 to 191 with ultraviolet light. The ultraviolet irradiation device 192 and the ultraviolet irradiation device 193 are disposed at positions sandwiching the ink jet heads 181 to 191 in the main scanning direction indicated by the arrow 80a.

  The back layer 34 is printed by the ink ejected by the ink jet heads 181 to 184. The black layer 33 is printed by the ink discharged by the ink jet head 185. The white layer 32 is printed by the ink ejected by the inkjet heads 186 and 187. The surface layer 31 is printed by the ink ejected by the inkjet heads 188 to 191.

  The inkjet heads 188 to 191 constitute a first head of the present invention. The inkjet heads 186 and 187 constitute a second head of the present invention. The inkjet head 185 constitutes a third head of the present invention. The inkjet heads 181 to 184 constitute a fourth head of the present invention. The ink jet heads 188 to 191, the ink jet heads 186 and 187, the ink jet heads 185, and the ink jet heads 181 to 184 are directed in the direction opposite to the direction shown by the arrow 80c, that is, from upstream to downstream in a specific direction. They are arranged in this order.

  The inkjet heads 181 to 191, the ultraviolet irradiation device 192, and the ultraviolet irradiation device 193 are mounted on the carriage 194, and moved relative to the medium 20 by moving the carriage 194 relative to the medium 20.

  The method of producing the multilayer printed matter 10 and the multilayer printed matter 120 by the inkjet printer 80 shown in FIG. 14 is basically the same as the method of producing the multilayer printed matter 10 and the multilayer printed matter 120 by the inkjet printer 80 shown in FIG. However, in the ink jet printer 80 shown in FIG. 14, the ink ejected by the ink jet heads 181 to 191 immediately after landing on the medium 20 side is one of the ultraviolet irradiation device 192 and the ultraviolet irradiation device 193. Ultraviolet rays are irradiated and cured by the ultraviolet ray irradiation device on the upstream side in the direction of relative movement in the main scanning direction.

  FIG. 15 is a view showing an example of the printing method of the surface layer 31, the white layer 32, the black layer 33 and the back layer 34 by the ink jet printer 80, which is different from the example shown in FIG. 13 and FIG.

  The ink jet printer 80 shown in FIG. 15 includes ink jet heads 281 to 291 which eject ink. The inkjet heads 281 to 291 are inkjet heads for the line head method. The colors of the ink ejected by the ink jet heads 281 to 291 are cyan, magenta, yellow, black (black), black (black), white (white), white (white), cyan, magenta, yellow, black ( Black). The ink ejected by the inkjet heads 281 to 291 is a UV ink which is cured by being irradiated with ultraviolet light.

  The ink jet printer 80 shown in FIG. 15 is provided with ultraviolet irradiation devices 292 to 296 for irradiating the ink discharged by the ink jet heads 281 to 291 with ultraviolet light. The ultraviolet irradiation device 292 and the ultraviolet irradiation device 293 are disposed at positions sandwiching the ink jet heads 281 to 284 in the direction indicated by the arrow 80 b. The ultraviolet irradiation device 293 and the ultraviolet irradiation device 294 are disposed at positions sandwiching the ink jet head 285 in the direction indicated by the arrow 80 b. The ultraviolet irradiation device 294 and the ultraviolet irradiation device 295 are disposed at positions sandwiching the ink jet heads 286 and 287 in the direction shown by the arrow 80 b. The ultraviolet irradiation device 295 and the ultraviolet irradiation device 296 are disposed at positions sandwiching the ink jet heads 288 to 291 in the direction indicated by the arrow 80 b.

  The back layer 34 is printed by the ink ejected by the ink jet heads 281-284. The black layer 33 is printed by the ink ejected by the ink jet head 285. The white layer 32 is printed by the ink ejected by the inkjet heads 286 and 287. The surface layer 31 is printed by the ink discharged by the ink jet heads 288 to 291.

  The inkjet heads 288 to 291 constitute a first head of the present invention. The inkjet heads 286 and 287 constitute a second head of the present invention. The ink jet head 285 constitutes a third head of the present invention. The inkjet heads 281 to 284 constitute a fourth head of the present invention. The inkjet heads 288 to 291, the inkjet heads 286 and 287, the inkjet heads 285, and the inkjet heads 281 to 284 are directed in the direction opposite to the direction shown by the arrow 80c, that is, from upstream to downstream in a specific direction. They are arranged in this order.

  The relative positions of the inkjet heads 281 to 291 and the ultraviolet irradiation devices 292 to 296 are fixed.

  When the inkjet printer 80 shown in FIG. 15 manufactures the multilayer printed material 10, the inkjet head 281 moves the medium 20 relative to the inkjet heads 281 to 291 and the ultraviolet irradiation devices 292 to 296 in the direction indicated by the arrow 80 c. The ink is ejected toward the medium 20 by 291 291. In the inkjet printer 80 shown in FIG. 15, when the multilayer printed material 10 is manufactured, the ink ejected by the inkjet heads 281 to 284, the ink ejected by the inkjet head 285, the ink ejected by the inkjet heads 286 and 287, Immediately after the ink ejected by the ink jet heads 288 to 291 lands on the medium 20 side, the ultraviolet irradiation devices 293, 294, 295, and 296 respectively irradiate and cure the ultraviolet light.

  When producing the multilayer printed matter 120, the inkjet printer 80 shown in FIG. 15 moves the medium 20 relative to the inkjet heads 281 to 291 and the ultraviolet irradiation devices 292 to 296 in the direction opposite to the direction indicated by the arrow 80c. The ink is ejected toward the medium 20 by the inkjet heads 281 to 291. In the ink jet printer 80 shown in FIG. 15, when the multilayer printed matter 120 is manufactured, the ink ejected by the ink jet heads 281 to 284, the ink ejected by the ink jet head 285, the ink ejected by the ink jet heads 286 and 287, Immediately after the ink ejected by the ink jet heads 288 to 291 lands on the medium 20 side, the ultraviolet irradiation devices 292, 293, 294, and 295 respectively irradiate and cure the ultraviolet light.

  The printing method of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 by the ink jet printer 80 may be a method other than the method shown in FIGS.

  In the above, the method of manufacturing a multilayer printed matter by forming the printing layer group on the medium 20 by the ink jet printer 80 based on the printing data generated by the computer 90 has been described. Here, the multilayer printed matter may be separated from the portion of the medium 20 other than the multilayer printed matter by the cutting plotter. In the following, there will be described a method of producing a multilayer printed matter by forming the printing layer group on the medium 20 by the ink jet printer 80 and separating the multilayer printed matter from the portion of the medium 20 other than the multilayer printed matter by the cutting plotter.

  First, when the inkjet printer 80 has a cutting plotter function, a method of producing a multilayer printed matter when printing and cutting are performed by the inkjet printer 80 will be described.

  FIG. 16 is a flow chart of a method of producing a multilayer printed matter when marks and alignment marks for cutting are not used when printing and cutting are performed by the inkjet printer 80.

  As shown in FIG. 16, the operator creates print data of the multilayer printed matter by the computer 90 (S301), and creates cut data of the multilayer printed article by the computer 90 in accordance with the print data created in S301 (S302). Next, the worker creates print cut data by combining the print data created in S301 and the cut data created in S302 by the computer 90 (S303), and uses the computer 90 the print cut data created in S303. It transmits to the inkjet printer 80 (S304).

  When the inkjet printer 80 receives the print cut data transmitted from the computer 90 in S304, it stores the origin position on the medium 20 (S305).

  Next, the inkjet printer 80 starts printing of the print layer group on the medium 20 based on the print data of the print cut data (S306), and determines that printing of the print layer group on the medium 20 is completed. It is determined whether the printing of the printing layer group on the medium 20 has been completed (S307).

  When the inkjet printer 80 determines in S307 that the printing of the printing layer group on the medium 20 is completed, the origin stored in S305 in order to return the medium 20 by the amount of conveyance of the medium 20 by printing of the printing layer group. The medium 20 is moved based on the position (S308).

  Subsequently, the inkjet printer 80 starts cutting of the medium 20 by the function of the cutting plotter based on the cut data of the print cut data (S309), and cuts until it is determined that the cut based on the cut data is completed. It is determined whether the cut based on the data is completed (S310).

  When it is determined by the inkjet printer 80 in S310 that the cutting based on the cut data is completed, a multilayer printed matter separated from the portion of the medium 20 other than the multilayer printed matter is manufactured.

  FIG. 17 is a flowchart of a method of producing a multilayer printed matter when registration marks are used when printing and cutting are performed by the inkjet printer 80.

  As shown in FIG. 17, the operator creates print data of the multilayer print by the computer 90 (S321), and creates cut data of the multilayer print by the computer 90 in accordance with the print data created in S321 (S322). Next, the operator adds a registration mark, which is matched with the cut data created in S322, to the print data created in S321 by the computer 90 (S323). Next, the worker creates print cut data by combining the print data to which registration marks have been added in S323 and the cut data created in S322 by the computer 90 (S324), and the print cut data created in S324 is a computer It transmits to the inkjet printer 80 by 90 (S325).

  When the inkjet printer 80 receives the print cut data transmitted from the computer 90 in S325, it stores the origin position on the medium 20 (S326).

  Next, the inkjet printer 80 starts printing the printing layer group and registration mark on the medium 20 based on the print data of the print cut data (S327), and the printing of the printing layer group and registration mark on the medium 20 is completed. Until it is determined that the printing has been completed, it is determined whether the printing of the printing layer group and the registration marks on the medium 20 is completed (S328).

  When the inkjet printer 80 determines in S328 that printing of the printing layer group and registration mark on the medium 20 is completed, storage is performed in S326 in order to return the medium 20 by the amount of transport of the medium 20 by printing of printing layer group and registration mark. The medium 20 is moved based on the original position which has been set (S329).

  Next, the ink jet printer 80 reads the registration mark printed on the medium 20 (S330), and according to the position of the registration mark read in S330, based on the cut data of the print cut data, the medium by the function of the cutting plotter 20 cuts are started (S331), and it is judged whether the cut based on the cut data is ended until it is judged that the cut based on the cut data is ended (S332).

  If it is determined by the ink jet printer 80 in S332 that the cutting based on the cut data is completed, a multilayer printed matter separated from a portion of the medium 20 other than the multilayer printed matter is manufactured.

  Next, a method of manufacturing a multilayer printed matter will be described in which the printing is performed by the inkjet printer 80 and the cutting is performed by a cutting plotter different from the inkjet printer 80.

  FIG. 18 is a flow chart of a method of producing a multilayer printed matter when registration marks are not used when printing is performed by the ink jet printer 80 and cutting is performed by a cutting plotter different from the ink jet printer 80.

  As shown in FIG. 18, the operator creates print data of a multilayer print by the computer 90 (S341), and creates cut data of the multilayer print by the computer 90 in accordance with the print data created at S341 (S342). Next, the worker transmits the print data created in S341 to the ink jet printer 80 by the computer 90 (S343).

  When the inkjet printer 80 receives the print data transmitted from the computer 90 in S343, it starts printing the print layer group on the medium 20 based on the print data (S344), and prints the print layer group on the medium 20. It is determined whether the printing of the printing layer group on the medium 20 is completed (S345) until it is determined that the process is completed.

  If it is determined by the inkjet printer 80 that printing of the print layer group on the medium 20 is completed in S345, the operator takes out the medium 20 on which the print layer group is printed by the inkjet printer 80 from the inkjet printer 80, The cutting plotter different from the ink jet printer 80 is set (S346). Here, the operator appropriately sets the medium 20 on the cutting plotter so that the origin position on the medium 20 matches the specific position on the cutting plotter.

  Next, the worker transmits the cut data created in S342 to the cutting plotter by the computer 90 (S347).

  When the cutting plotter receives the cut data transmitted from the computer 90 in S347, it starts cutting of the medium 20 based on the cut data (S348), and cuts until it is determined that the cut based on the cut data is completed. It is determined whether the cut based on the data is completed (S349).

  If it is determined by the cutting plotter in S 349 that the cutting based on the cut data is completed, a multilayer printed matter separated from a portion of the medium 20 other than the multilayer printed matter is manufactured.

  FIG. 19 is a flowchart of a method of producing a multilayer printed matter when registration marks are used when printing is performed by the inkjet printer 80 and cutting is performed by a cutting plotter different from the inkjet printer 80.

  As shown in FIG. 19, the operator creates print data of a multilayer printed article by the computer 90 (S361), and creates cut data of the multilayer printed article by the computer 90 in accordance with the print data created in S361 (S362). Next, the operator adds a registration mark, which is matched with the cut data created in S362, to the print data created in S361 by the computer 90 (S363). Next, the worker transmits the print data to which the registration mark has been added in S363 to the inkjet printer 80 by the computer 90 (S364).

  When the inkjet printer 80 receives the print data transmitted from the computer 90 in S364, it starts printing the printing layer group and registration mark on the medium 20 based on the printing data (S365), and the printing layer on the medium 20. It is determined whether the printing of the printing layer group and registration mark on the medium 20 is completed until it is determined that the printing of the group and registration mark is completed (S366).

  If it is determined by the inkjet printer 80 in S366 that printing of the printing layer group and registration mark on the medium 20 is completed, the worker causes the inkjet printer 80 to print the printing layer group and registration mark printed medium 20 by the inkjet printer 80. , And set on a cutting plotter different from the ink jet printer 80 (S367). Here, the operator appropriately sets the medium 20 on the cutting plotter so that the origin position on the medium 20 matches the specific position on the cutting plotter.

  Next, the worker transmits the cut data created in S362 to the cutting plotter by the computer 90 (S368).

  The cutting plotter reads the mark printed on the medium 20 (S369), and starts cutting the medium 20 based on the cut data according to the position of the mark read in S369 (S370), based on the cut data Until it is determined that the cut is completed, it is determined whether the cut based on the cut data is completed (S371).

  When it is determined by the cutting plotter in S371 that the cutting based on the cut data is completed, a multilayer printed matter separated from a portion of the medium 20 other than the multilayer printed matter is manufactured.

  As described above, since the multilayer printed matter 10 and the multilayer printed matter 120 include the white layer 32 and the black layer 33 as the printing layer for concealing between the surface layer 31 and the back layer 34, light is applied from the surface layer 31 side. When light is not applied from the light source 50 on the opposite side to the surface layer 31 to the back layer 34 in the state, the light to the surface layer 31 is from the opposite side to the back layer 34 side, that is, When viewed from the opposite side by the user 60, the concealability of the back layer 34 can be improved. That is, the multilayer printed matter 10 and the multilayer printed matter 120 can improve the concealability of the design on the light source 50 side among the plurality of designs when no light is applied from the light source 50 on the back side.

  In the multilayer printed matter 10 and the multilayer printed matter 120, since the black layer 33 has higher light shielding performance than the white layer 32 when the white layer 32 and the black layer 33 are compared at the same thickness, the printing for concealment is performed only with the white layer 32. The same concealing performance can be obtained even if the overall thickness of the concealing print layer is reduced compared to when the layer is formed. That is, the multilayer printed matter 10 and the multilayer printed matter 120 can reduce the thickness of the entire concealed printing layer. Therefore, in the multi-layered printed matter 10 and the multi-layered printed matter 120, when light from the light source 50 on the side opposite to the surface layer 31 is applied to the back layer 34 in a state where light from the surface layer 31 side is suppressed. It is possible to suppress the amount of light scattered from the light source 50 by the printing layer for hiding when transmitted through the printing layer for hiding, and as a result, the light from the light source 50 makes the back layer 34 clearer on the surface 31 side. Can be seen through. For example, when the multilayer printed matter 10 and the multilayer printed matter 120 are irradiated with light from the light source 50 on the side opposite to the surface layer 31 side with respect to the back layer 34 in a state where light hitting from the surface layer 31 side is suppressed. The outline of the design in the back layer 34 can be clearly seen through the surface layer 31 by the light from the light source 50.

  The multilayer printed matter 10 and the multilayer printed matter 120 are provided with two concealing printing layers different in light blocking performance of the material, that is, the white layer 32 and the black layer 33. Therefore, white of the two concealing printing layers has low light blocking performance. The same concealing performance can be obtained even if the thickness of the entire concealed printing layer is reduced as compared with the case where the concealed printing layer is formed of the material of the layer 32, that is, only the white ink. Therefore, the multilayer printed matter 10 and the multilayer printed matter 120 can reduce, for example, the amount of ink for printing the concealed printing layer by reducing the thickness of the entire concealed printing layer. Moreover, the multilayer printed matter 10 and the multilayer printed matter 120 can also shorten the printing time of the printing layer for concealment by reducing the thickness of the whole printing layer for concealment depending on the printing method of the printing layer for concealment. For example, when the positions of the ink jet heads 81 to 86 in the sub scanning direction with respect to the medium 20 are the same position, the number of relative movements of the ink jet heads 81 to 86 in the main scanning direction with respect to the medium 20, that is, the number of passes is increased. Therefore, when the printing method is to increase the amount of ink ejected from the inkjet heads 81 to 86 toward the medium 20, the thickness of the entire concealed printing layer may be reduced, that is, from the inkjet heads 81 to 86 to the medium 20. By reducing the amount of ink ejected toward the printing medium, the printing time of the concealed printing layer can be shortened.

  If the light shielding performance of the multilayer printed matter 10 and the multilayer printed matter 120 is too low in light shielding performance of the concealed printing layer on the back layer 34 side (hereinafter referred to as “back layer side concealed printing layer”), light from the user 60 side That is, when ambient light is applied, the user 60 easily sees the design of the back layer 34. In the multilayer printed matter 10 and the multilayer printed matter 120, if the light shielding performance of the back layer side concealing printing layer is too high, even if light is applied from the light source 50, the user 60 from the opposite side to the light source 50 side It is difficult to see 34 symbols. Therefore, it is preferable that the multilayer printed matter 10 and the multilayer printed matter 120 have a moderate density which is not too low and too high in black density of the back layer side concealing printing layer. For example, when the thickness of the medium 20 is reduced, the multilayer printed matter 10 and the multilayer printed matter 120 can easily transmit the light from the light source 50, so the black density of the back layer side concealing printing layer should be increased. Is preferred. In the multilayer printed matter 10 and the multilayer printed matter 120, when the light from the user 60 side, that is, the ambient light becomes strong, the design of the back layer 34 becomes easy to be recognized by the user 60. It is preferred to increase the black density of the layer.

  In the multi-layered printed matter 10 and the multi-layered printed matter 120, the black layer 33 is laminated on the surface layer 31 when light is applied from the light source 50 on the back layer 34 in a state where light hitting from the surface layer 31 side is suppressed. The light from the light source 50 is easily transmitted through the region 10b (see FIG. 6) which does not exist in the light, and thus the light from the light source 50 on the back layer 34 is applied in a state where the light falling from the surface layer 31 is suppressed. In this case, when viewed by the user 60 from the side opposite to the light source 50 side, the area 10 b where the black layer 33 does not exist in the stacking direction with respect to the surface layer 31 can be highlighted.

  In the embodiment, the multilayer printed matter 10 and the multilayer printed matter 120 have portions 33 a which do not exist in the laminating direction with respect to the surface layer 31 in the black layer 33. However, the multilayer printed matter 10 and the multilayer printed matter 120 may have portions in the white layer 32 which are not present in the laminating direction with respect to the surface layer 31.

  In the multilayer printed matter 10 and the multilayer printed matter 120, since the back layer side concealing print layer is the black layer 33 and exhibits high light shielding performance even if the back layer side concealment print layer is thin, the back layer side concealment print layer The thickness can be reduced. In the multilayer printed matter 10 and the multilayer printed matter 120, the back layer side concealing printing layer may not be black.

  In the multilayer printed matter 10 and the multilayer printed matter 120, the concealment printing layer on the surface 31 side (hereinafter referred to as the “surface layer concealing printing layer”) is the white layer 32, and the surface layer concealing printing layer has high brightness. When the surface layer 31 is viewed by the user 60 from the side opposite to the light source 50 side when the light is not irradiated from the light source 50 on the back layer 34 side in a state where light is incident from the side 31 The lightness of the displayed pattern can be improved by the lightness of the surface layer side concealing printing layer. In the multilayer printed matter 10 and the multilayer printed matter 120, the surface layer side concealing print layer may not be white.

  In the multilayer printed matter 10 and the multilayer printed matter 120, the light shielding performance of the material of the back layer side concealing print layer is higher than the light shielding performance of the material of the surface layer side concealing print layer, the lightness of the surface layer side concealing print layer is concealed on the back layer side It can be made higher than the printing layer. In the multilayer printed matter 10 and the multilayer printed matter 120, the lightness of the white layer 32, which is the printing layer for surface layer side hiding, is higher than that of the black layer 33, which is the printing layer for hiding the back layer side. When the surface layer 31 is viewed by the user 60 from the side opposite to the light source 50 side when no light is applied from the light source 50 on the back layer 34 side, the brightness of the pattern represented by the surface layer 31 is the white layer 32 Can be improved by the lightness of

  In the multilayer printed matter 10 and the multilayer printed matter 120, the back layer side concealing print layer has higher light shielding performance than the back layer side concealing print layer when compared with the surface layer side concealing print layer at the same thickness and reflects light. Performance is low. The difference between the light shielding performance and the light reflection performance can be realized by the difference of the material, or even the same material can be realized by the difference of the structure. Here, the difference in structure means, for example, the difference in the size and the content of particles contained in the ink.

  The multilayer printing method shown in FIGS. 13 to 15 corresponds to the inkjet heads 81 to 86, the inkjet heads 181 to 191, and the inkjet heads 281 to 291, respectively, in a specific one direction in the sub scanning direction indicated by the arrow 80b. Since the four layers of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 can be simultaneously printed only by relative movement, each printing can be performed compared to the method of printing each area sequentially. The positional accuracy between layers can be improved, and high quality multilayer printed matter 10 and multilayer printed matter 120 can be manufactured.

  In the present embodiment, inkjet printing is used as a printing method for multilayer printed matter. However, the printing method of the multilayer printed matter may be a printing method other than inkjet printing.

10 multilayer printed matter 10a arrow (arrow indicating the stacking direction)
20 medium 30 printing layer group 31 surface layer (first pattern printing layer)
32 white layer (first concealed printing layer)
33 Black layer (second hiding print layer)
33a part (the part which does not exist in the stacking direction with respect to the first symbol printed layer)
34 Back layer (second pattern print layer)
80 inkjet printer 80a arrow (arrow indicating main scanning direction)
80b Arrow (arrow showing sub scanning direction)
80c Arrows (arrows indicating a specific one of the sub-scanning directions, arrows indicating a direction opposite to the specific direction)
81 to 86 inkjet heads 81a, 82a, 83a, 84a area (fourth head)
84b area (third head)
85c, 86c area (second head)
81d, 82d, 83d, 84d area (first head)
120 multilayer printed matter 181 to 184 inkjet head (fourth head)
185 Ink jet head (third head)
186 to 187 Ink jet head (second head)
188 to 191 Ink jet head (first head)
281 to 284 inkjet head (fourth head)
285 Inkjet head (third head)
286 to 287 Inkjet head (second head)
288 to 291 Inkjet head (first head)

Claims (9)

A first symbol printing layer and a second symbol printing layer on which symbols are printed;
The first symbol printing layer is disposed between the first symbol printing layer and the second symbol printing layer to conceal the second symbol printing layer from the first symbol printing layer side, and the first symbol printing layer A first concealing printing layer for reflecting light incident from the layer side to make the first symbol printing layer visible from the first symbol printing layer side;
A second concealing layer disposed between the first concealment printing layer and the second symbol printing layer for concealing the second symbol printing layer with respect to the first symbol printing layer side A printing layer group including the printing layer is formed on the medium;
A multilayer printed matter characterized in that the second concealing print layer has a higher light shielding performance than the first concealing print layer when compared with the first concealing print layer at the same thickness. The first concealment print layer and the second concealment print layer are
Light is applied to the multilayer printed matter from the light source on the side opposite to the first symbol printed layer side with respect to the second symbol printed layer in a state where light is applied to the multilayer printed matter from the first symbol printed layer side When the multi-layered printed matter is viewed from the side opposite to the second symbol printing layer side with respect to the first symbol printing layer, the second symbol printing layer is concealed when the second symbol printing layer is not applied. ,
When light is applied from the light source to the multi-layered printed matter in a state in which light hitting the multi-layered printed matter from the first-pattern printed layer side is suppressed, the second relative to the first-pattern printed layer When the multi-layered printed matter is viewed from the side opposite to the symbol printing layer side, the second symbol printing layer can be seen through to the first symbol printing layer side by the light applied from the light source. The multilayer printed matter according to claim 1, characterized in that   The multilayer printed matter according to claim 1 or 2, wherein the second concealing print layer is thinner than the first concealing print layer.   The multilayer printed matter according to any one of claims 1 to 3, wherein the second concealing print layer is a black layer.   The multilayer printed matter according to claim 4, wherein the first concealing print layer is a white layer.   The at least one of the first concealment print layer and the second concealment print layer is not partially present in the laminating direction with respect to the first symbol print layer. The multilayer printed matter according to any one of claims 5 to 10. A first symbol printing layer and a second symbol printing layer on which symbols are printed;
The first symbol printing layer is disposed between the first symbol printing layer and the second symbol printing layer to conceal the second symbol printing layer from the first symbol printing layer side, and the first symbol printing layer A first concealing printing layer for reflecting light incident from the layer side to make the first symbol printing layer visible from the first symbol printing layer side;
A second concealing layer disposed between the first concealment printing layer and the second symbol printing layer for concealing the second symbol printing layer with respect to the first symbol printing layer side Forming a printing layer group including the printing layer on the medium;
The second printing layer for concealing has a light shielding performance higher than that of the first printing layer for concealment when compared at the same thickness as the first concealing print layer. The printing layer group is a first head as an inkjet head for ejecting an ink for forming the first pattern printing layer, and an inkjet head for ejecting an ink for forming the first concealed printing layer A second head as a second head, a third head as an ink jet head for discharging an ink for forming the second concealed printing layer, and an ink for forming the second graphic print layer Formed by an inkjet printer having a fourth head as an inkjet head,
The first head, the second head, the third head, and the fourth head are directed from the upstream to the downstream in a specific direction, and the first head, the second head, the fourth The third head and the fourth head are arranged in this order,
One of the first head, the second head, the third head and the fourth head, and one of the medium with the other, the particular direction, and the opposite direction of the particular direction The multilayer printing method according to claim 7, wherein the printing layer group is formed by relatively moving in only one of the directions. The first head when moving the other relative to one of the first head, the second head, the third head and the fourth head, and the medium with respect to one of the medium; Causing the second head, the third head, and the fourth head to eject ink toward the medium;
The first head, the second head, the third head, and the fourth head have the same discharge region length in the sub scanning direction orthogonal to the main scanning direction, and the sub scanning Are arranged offset by the length of the discharge area in the
The particular direction is any one of the sub-scanning directions,
Every time printing in the main scanning direction by the first head, the second head, the third head and the fourth head is finished, the first head, the second head, the first head Moving the medium relative to the third head and the fourth head in a specific one of the sub-scanning directions by the length of the discharge area in the sub-scanning direction. Item 9. A multilayer printing method according to item 8.

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