JP7023661B2 - Multi-layer printed matter and multi-layer printing method - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act August 29, 2017, Website ((A) http: //japan.mimaki.com/, (B) http: //japan.mimaki.com/news/product /Entry-265510.html, (C) http: //japan.mimaki.com/product/inkjet/print-cut/ucjv300-160/, (D) http: //japan.mimaki.com/prod print-cut / ucjv150-160 /, (E) http: // ir.mimaki.com/library/press.html, (F) http: //v4.air-parts.net/v4Conents/View.aspx? = Tdnet & side = 15112020).

Application of Article 30, Paragraph 2 of the Patent Act To SIGN & DISPLAY SHOW 2017 held at Tokyo Big Sight West Hall 1 (3-11-1 Ariake, Koto-ku, Tokyo) from August 31st to September 2nd, 2017. Exhibited.

Application of Article 30, Paragraph 2 of the Patent Act The UCJV300-160 / UCJV15-160 catalog was published on September 11, 2017.

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

Conventionally, a transparent or translucent sheet in which a pattern is printed on both the front surface and the back surface is known (see, for example, Patent Document 1). In the sheet described in Patent Document 1, when the light is shined from the front surface side and the light is not shined from the light source on the back surface side, the design on the front surface side is mainly visually recognized from the front surface side. On the other hand, in the sheet described in Patent Document 1, when the light shining from the front surface side is suppressed and the light is shined from the light source on the back surface side, the design on the back surface side is the light shining from the light source. Since it can be seen through to the front surface side, the design on the back surface side can be easily seen from the front surface side as compared with the case where the light source on the back surface side does not illuminate.

Japanese Unexamined Patent Publication No. 2009-128734

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

Therefore, the present invention provides a multilayer printed matter and a multilayer printing method capable of improving the concealment of a pattern on the light source side among a plurality of symbols on the front surface side when light is not applied from the light source on the back surface side. The purpose is to do.

The multilayer printed matter of the present invention is arranged between a first symbol printing layer and a second symbol printing layer on which a symbol is printed, and the first symbol printing layer and the second symbol printing layer. The second symbol print layer is concealed from the symbol print layer side of 1, and the light incident from the first symbol print layer side is reflected to reflect the light incident from the first symbol print layer side to the first symbol print layer side. It is arranged between the first concealment printing layer for visually recognizing the design printing layer, the first concealing printing layer, and the second design printing layer, with respect to the first design printing layer side. A print layer group including a second concealment print layer for concealing the second pattern print layer is formed on the medium, and the second concealment print layer is the first concealment print. When compared with the same thickness as the layer, the light-shielding performance is higher than that of the first concealment printing layer.

With this configuration, the multilayer printed matter of the present invention includes a concealment printing layer between the first symbol printing layer and the second symbol printing layer, so that the light is shining from the first symbol printing layer side. When light is not applied to the second design print layer from the light source on the side opposite to the first design print layer side, what is the second design print layer side with respect to the first design print layer? When visually recognized from the opposite side, the concealing property of the second pattern print layer can be improved. That is, the multilayer printed matter of the present invention can improve the concealing property of the symbol on the light source side among the plurality of symbols on the front surface side when the light is not applied from the light source on the back surface side. Further, in the multilayer printed matter of the present invention, when the first concealment print layer and the second concealment print layer are compared with the same thickness, the second concealment print layer is the first concealment print. Since the light-shielding performance is higher than that of the layer, the same concealment performance can be obtained even if the thickness of the entire concealment print layer is reduced as compared with the case where the concealment print layer is formed only by the first concealment print layer. Can be done. That is, the multilayer printed matter of the present invention can reduce the thickness of the entire concealed printed matter. Therefore, in the multilayer printed matter of the present invention, the light shining from the first pattern printing layer side is suppressed, and the light is emitted from the light source on the side opposite to the first design printing layer side with respect to the second design printing layer. When the light is applied, the amount of light scattered by the concealing print layer when the light applied from the light source passes through the concealment print layer can be suppressed, and as a result, the second pattern print layer is used as the light source. It can be clearly seen through to the side of the first pattern printing layer by the light from.

In the multilayer printed matter of the present invention, the first concealing print layer and the second concealing print layer are the second in a state where the multilayer printed matter is exposed to light from the first pattern printing layer side. When the multilayer printed matter is not exposed to light from a light source on the side opposite to the first symbol printing layer side with respect to the symbol printing layer, the second symbol printing is performed on the first symbol printing layer. When the multilayer printed matter is visually recognized from the side opposite to the layer side, the light source is concealed from the second symbol printing layer and the light hitting the multilayer printed matter is suppressed from the first symbol printing layer side. When the multilayer printed matter is illuminated from the side opposite to the second symbol printing layer side with respect to the first symbol printing layer, the second multilayer printed matter is visually recognized. It is characterized in that the design printing layer is made visible through the first design printing layer side by the light applied from the light source.

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 matter of the present invention can reduce the amount of ink for printing the concealed print layer when the concealed print layer is printed with ink.

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

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

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

With this configuration, in the multilayer printed matter of the present invention, the brightness of the first concealment printing layer is high, so that the first design printing layer is exposed to light from the first design printing layer side. When no light is applied from the light source on the side opposite to the pattern printing layer side, the first design printing layer is visible from the side opposite to the second design printing layer side with respect to the first design printing layer. When so, the brightness of the symbol represented by the first symbol print layer can be improved by the brightness of the first concealment print layer.

In the multilayer printed matter of the present invention, at least one of the first concealing print layer and the second concealment print layer is not partially present in the stacking direction with respect to the first pattern print layer. Is also good.

With this configuration, the multilayer printed matter of the present invention has 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 where the light shining from the first symbol printing layer side is suppressed. When the light from the light source is applied to a region where at least one of the first concealing print layer and the second concealment print layer does not exist in the stacking direction with respect to the first pattern print layer when the light is applied from the light source. Since it is easy to transmit, light is applied to the second design print layer from the light source on the opposite side of the first design print layer side while the light shining from the first design print layer side is suppressed. When the first pattern print layer is visually recognized from the side opposite to the second pattern print layer side, at least one of the first concealment print layer and the second concealment print layer is the first. Areas that do not exist in the stacking direction can be highlighted with respect to the pattern print layer of 1.

The multilayer printing method of the present invention is arranged between a first symbol printing layer and a second symbol printing layer on which a symbol is printed, and 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 reflect the light incident from the first symbol print layer side to the first symbol print layer side. The first concealment print layer for visually recognizing the pattern print layer, and the first concealment print layer and the second symbol print layer arranged between the first concealment print layer and the first symbol print layer side. A print layer group including a second concealment print layer for concealing the second pattern print layer is formed on the medium, and the second concealment print layer is the first concealment print layer. When compared with the same thickness as the above, the light-shielding performance is higher than that of the first concealing print layer.

With this configuration, the multilayer printed matter produced by the multilayer printing method of the present invention includes a concealing printing layer between the first symbol printing layer and the second symbol printing layer, and therefore, from the first symbol printing layer side. When the second symbol print layer is not exposed to light from the light source opposite to the first symbol print layer side in the state of being exposed to light, the second symbol print layer is exposed to the second symbol print layer. When visually recognized from the side opposite to the pattern printing layer side, the concealing property of the second pattern printing layer can be improved. That is, the multilayer printed matter produced by the multilayer printing method of the present invention improves the concealing property of the symbol on the light source side among the plurality of symbols on the front surface side when the light is not applied from the light source on the back surface side. Can be done. Further, in the multilayer printed matter produced by the multilayer printing method of the present invention, when the first concealing print layer and the second concealment print layer are compared with the same thickness, the second concealment print layer is obtained. However, since the light-shielding performance is higher than that of the first concealment print layer, even if the thickness of the entire concealment print layer is reduced as compared with the case where the concealment print layer is formed only by the first concealment print layer. The same concealment performance can be obtained. That is, the multilayer printed matter produced by the multilayer printing method of the present invention can reduce the thickness of the entire concealing printed layer. Therefore, the multilayer printed matter produced by the multilayer printing method of the present invention has the first symbol printing layer side with respect to the second symbol printing layer in a state where the light shining from the first symbol printing layer side is suppressed. Can reduce the amount of light scattered by the concealing print layer as it passes through the concealed print layer when the light is shined from the opposite light source, and as a result, The pattern printing layer 2 can be clearly seen through to the side of the first pattern printing layer by the light from the light source.

In the multilayer printing method of the present invention, the print layer group forms a first head as an inkjet head for ejecting ink for forming the first pattern print layer, and the first concealment print layer. A second head as an inkjet head for ejecting ink for the purpose, a third head as an inkjet head for ejecting ink for forming the second concealment 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 inkjet printer including an inkjet head as an inkjet head for ejecting ink for forming the first head, the second head, and the fourth head. The first head, the second head, the third head, and the fourth head are arranged in this order from upstream to downstream in a specific direction, and the first head and the first head are arranged in this order. Two heads, the third head, the fourth head, and the other with respect to one of the media, one of the specific direction and the direction opposite to the specific direction. The printed layer group may be formed by relatively moving only in the direction.

With this configuration, the multilayer printing method of the present invention only moves the medium relative to the inkjet head in one of a specific direction and a 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 printed at the same time, a method of printing each print layer in order for all areas. In comparison with the above, the positional accuracy between the print layers can be improved, and high-quality multilayer printed matter can be produced.

In the multilayer printing method of the present invention, the first head, the second head, the third head, the fourth head, and one of the media are moved relative to each other in the main scanning direction. At that time, the first head, the second head, the third head, and the fourth head eject ink toward the medium, and the first head, the second head, and the second head. The head 3 and the fourth head have the same length of the ejection region in the sub-scanning direction orthogonal to the main scanning direction, and are arranged so as to be offset by the length of the ejection region in the sub-scanning direction. The specific direction is one of the sub-scanning directions, and the main head by the first head, the second head, the third head, and the fourth head. Each time printing in the scanning direction is completed, the medium is applied to the first head, the second head, the third head and the fourth head, and the length of the ejection region in the sub-scanning direction is long. By the way, it may be relatively moved in a specific one of the sub-scanning directions.

With this configuration, the multilayer printing method of the present invention simply moves the medium relative to the inkjet head in a specific one direction in the sub-scanning direction, and the first symbol printing layer, the second symbol printing layer, and the first. Since the four layers of the concealment print layer and the second concealment print layer can be printed at the same time, the positional accuracy between the print layers is improved as compared with the method of printing each print layer in order for all areas. And can produce high quality multilayer printed matter.

The multilayer printed matter and the multilayer printing method of the present invention can improve the concealing property of the symbol on the light source side among the plurality of symbols on the front surface side when the light is not applied from the light source on the back surface 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. 1. (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 the display device provided with the multilayer printed matter shown in FIG. 1. It is a top view of the multilayer printed matter in the case where the light is applied from the light source shown in FIG. 5 in the state where the light applied from the surface layer side is suppressed. It is a block diagram of the manufacturing system of the multilayer printed matter shown in FIG. 1. It is a block diagram of the computer shown in FIG. 7. 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 executed 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 where a check box is checked. It is a side view of the display device provided with the multilayer printed matter different from the multilayer printed matter shown in FIG. 1. It is a figure which shows an example of the printing method of the surface layer, the white layer, the black layer and the back layer by the inkjet printer shown in FIG. 7. It is a figure which shows an example different from the example shown in FIG. 13 of the printing method of the surface layer, the white layer, the black layer and the back layer by the inkjet printer shown in FIG. 7. It is a figure which shows an example different from the example shown in FIG. 13 and FIG. 14 of the printing method of the surface layer, the white layer, the black layer and the back layer by the inkjet printer shown in FIG. 7. It is a flowchart of the manufacturing method of the multilayer printed matter when the register mark is not used when printing and cutting are executed by the inkjet printer shown in FIG. 7. It is a flowchart of the manufacturing method of a multilayer printed matter when a register mark is used when printing and cutting are executed by the inkjet printer shown in FIG. 7. FIG. 7 is a flowchart of a method for manufacturing a multilayer printed matter when a registration mark is not used when printing is executed by the inkjet printer shown in FIG. 7 and then cutting is executed by a cutting plotter different from the inkjet printer. FIG. 7 is a flowchart of a method for manufacturing a multilayer printed matter when a dragonfly is used when printing is executed by the inkjet printer shown in FIG. 7 and then cutting is executed by a cutting plotter different from the inkjet printer.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

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

FIG. 1 is a plan view of the multilayer printed matter 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 matter 10 includes a medium 20 and a print 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. 3B is a plan view of the white layer 32. FIG. 4A is a plan view of the black layer 33. FIG. 4B is a plan view of the back layer 34.

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

As shown in FIG. 2, the white layer 32 shown in FIG. 3B is arranged between the surface layer 31 and the back layer 34 to hide the back layer 34 from the surface layer 31 side and is incident from the surface layer 31 side. The surface layer 31 is made visible from the surface layer 31 side by reflecting the light, which constitutes the first concealment printing layer of the present invention. The white layer 32 is printed with white ink. The white layer 32 is printed at, for example, 200%, where 100% is the case where the white ink lands on all the pixels to be printed on the medium 20.

As shown in FIG. 2, the black layer 33 shown in FIG. 4A is arranged between the white layer 32 and the back layer 34 and hides the back layer 34 from the surface layer 31 side. It constitutes a second concealment print layer. Since the black layer 33 is printed with black ink, the light-shielding performance is higher than that of the white layer 32 printed with white ink. As shown in FIG. 2, the black layer 33 includes a portion 33a that does not exist in the stacking direction indicated by the arrow 10a with respect to the surface layer 31. The black layer 33 is printed at, for example, 30% to 70%, assuming that the case where the black ink lands on all the pixels to be printed on the medium 20 is 100%. The black layer 33 has higher light-shielding performance than the white layer 32 when compared with the white layer 32 with the same thickness.

As shown in FIG. 4B, the back layer 34 represents a design and constitutes the second design printing layer of the present invention.

Next, the configuration of the display device including 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 a multilayer printed matter 10 and a light source 50 arranged 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 matter 10 is visually recognized 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 matter 10.

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

When the multilayer printed matter 10 is exposed to light from the surface layer 31 side and is not exposed to light from the light source 50 on the back layer 34 side, the design of the surface layer 31 is visually recognized by the user 60 as shown in FIG. The light source.

FIG. 6 is a plan view of the multilayer printed matter 10 when the light shining from the surface layer 31 side is suppressed and the light is shined from the light source 50 on the back layer 34 side.

In the multilayer printed matter 10, when the light shining from the surface layer 31 side is suppressed and the light is shined from the light source 50 on the back layer 34 side, as shown in FIG. 6, the design of the back layer 34 is from the light source 50. Since it can be seen through to the surface layer 31 side by the applied light, the user 60 can visually recognize the symbol in which the symbol of the surface layer 31 and the symbol 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 the manufacturing system 70 of the multilayer printed matter 10.

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

The inkjet printer 80 may be, for example, UCJV-300 manufactured by Mimaki Engineering Co., Ltd., which can perform printing on the medium 20 wound in a roll shape, or may be another inkjet printer.

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

As shown in FIG. 8, the computer 90 is an operation unit 91 which is an input device such as a keyboard and a mouse into which various operations are input, and a display device such as an LCD (Quick Crystal Disk play) which displays various information. Various types of display unit 92, communication unit 93 which is a communication device that directly communicates with an external device via a network such as a LAN (Local Area Network) or directly by wire or wirelessly without a network. It includes a storage unit 94, which is a non-volatile storage device such as a semiconductor memory for storing information and an HDD (Hard Disk Drive), and a control unit 95 for controlling the entire computer 90.

The storage unit 94 stores an image data generation program 94a for generating image data, a preview execution program 94b for executing a 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 in the computer 90 at the manufacturing stage of the computer 90, respectively, or may be installed in the computer 90, a USB (Universal Serial Bus) memory, or a CD (Compact Disk). , DVD (Digital Versaille Disk) or the like may be additionally installed on the computer 90, or may be additionally installed on the computer 90 from the network.

The control unit 95 includes, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory) that stores programs and various data in advance, and a RAM (Random Access Memory) used as a work area of the CPU. ing. The CPU is designed to execute a program stored in the ROM or the storage unit 94.

By executing the image data generation program 94a, the control unit 95 realizes the image data generation means 95a that generates the 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 preview execution program 94b, the control unit 95 realizes the preview execution means 95b that executes the preview of the multilayer printed matter to be printed based on the image data generated by the image data generation means 95a. The control unit 95 realizes the print data generation means 95c that generates print data based on the image data generated by the image data generation means 95a by executing the print data generation program 94c.

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

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

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

After the step of S101, the operator causes the computer 90 to execute the preview execution program 94b, and instructs the operation unit 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 execution means 95b executes a 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 means 95b.

The preview screen 110 shown in FIG. 10 has a preview area 111 for displaying a preview of the multilayer printed matter printed based on the image data, and a display device 40 as shown in FIG. 5 for the multilayer printed matter printed based on the image data. Includes a check box 112 for selecting whether or not to display a preview of the multilayer printed matter when illuminated from the light source 50 when used in.

The preview screen 110 shown in FIG. 10 is a 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 the multilayer printed matter when the light is not applied from the light source 50 on the back layer 34 side while the 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 a 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 when the light is applied from the light source 50 on the back layer 34 side while the light emitted from the surface layer 31 side is suppressed is displayed. ..

As shown in FIG. 9, the operator determines whether or not the image data needs to be modified as a result of the preview in S102 (S103).

When the operator determines in S103 that the image data needs to be corrected, the operator executes the step of S101.

When 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 the operation unit 91 to print based on the image data generated in S101 (). S104). Therefore, the print data generation means 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, the inkjet printer 80 forms a 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 printing the back layer 34, the black layer 33, the white layer 32, and the surface layer 31 on the medium 20 in this order.

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

FIG. 13 is a diagram 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 inkjet printer 80.

The inkjet printer 80 shown in FIG. 13 includes inkjet heads 81 to 86 for ejecting ink. The inkjet heads 81 to 86 are inkjet heads for the 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 inkjet 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 inkjet heads 81 to 86 are mounted on the carriage 87 and are moved relative to the medium 20 by the carriage 87 being moved relative to the medium 20.

In the inkjet printer 80 shown in FIG. 13, when one of the inkjet heads 81 to 86 and the medium 20 is relatively moved in the main scanning direction indicated by the arrow 80a, the ink jet heads 81 to 86 point the ink at the medium 20. Is discharged.

When the inkjet printer 80 shown in FIG. 13 ejects ink toward the medium 20 by the inkjet heads 81 to 86, the arrow 80b in the ink ejection region of the inkjet heads 81 to 86 is orthogonal to the main scanning direction. Of the sub-scanning directions shown, 1/4 of the area from the upstream side to the downstream side in the direction indicated by the arrow 80c, in order, the printing areas 81a, 82a, 83a, 84a, 85a and 86a of the back layer 34, black. The printing areas 81b, 82b, 83b, 84b, 85b and 86b of the layer 33, the printing areas 81c, 82c, 83c, 84c, 85c and 86c of the white layer 32, and the printing areas 81d, 82d of the surface layer 31. It is set to 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 regions 81c, 82c, 83c and 84c are not actually used. Similarly, the regions 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.

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

In the inkjet printer 80 shown in FIG. 13, each time printing by the inkjet heads 81 to 86 is completed in the main scanning direction, the medium 20 is printed on the inkjet heads 81 to 86, for example, the length of the ejection region in the sub-scanning direction is 80d. The multilayer printed matter 10 shown in FIG. 5 can be manufactured by relatively moving the printed matter 10 in the direction indicated by the arrow 80c by the length of 1/16 of the above.

The inkjet printer 80 shown in FIG. 13 uses the medium 20 with respect to the inkjet heads 81 to 86 for a length of 1/16 of the length 80d each time printing is completed by the inkjet heads 81 to 86 in the main scanning direction. , When the relative movement is performed in the direction indicated by the arrow 80c, any portion is printed four times in the main scanning direction by the inkjet heads 81 to 86 on each of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34. That is, it will be completed in 4 passes. Therefore, the inkjet printer 80 shown in FIG. 13 completes printing of an arbitrary portion on the multilayer printed matter 10 in 16 passes. However, the inkjet printer 80 shown in FIG. 13 employs a number of passes other than 4 as the number of passes for completing printing at any portion of each of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34. Is also good.

In the inkjet printer 80 shown in FIG. 13, each time printing by the inkjet heads 81 to 86 is completed in the main scanning direction, the medium 20 is applied to the inkjet heads 81 to 86 by, for example, 1/16 of the length 80d. The multilayer printed matter 120 shown in FIG. 12 can be manufactured by moving the printed matter 120 in the direction opposite to the direction indicated by the arrow 80c.

FIG. 14 is a diagram 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 inkjet printer 80, which is different from the example shown in FIG.

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

The inkjet printer 80 shown in FIG. 14 includes an ultraviolet irradiation device 192 and an ultraviolet irradiation device 193 for irradiating the ink ejected by the inkjet heads 181 to 191 with ultraviolet rays. The ultraviolet irradiation device 192 and the ultraviolet irradiation device 193 are arranged at positions sandwiching the inkjet 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 inkjet heads 181 to 184. The black layer 33 is printed by the ink ejected by the inkjet 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 the first head of the present invention. The inkjet heads 186 and 187 constitute the second head of the present invention. The inkjet head 185 constitutes the third head of the present invention. The inkjet heads 181 to 184 constitute the fourth head of the present invention. The inkjet heads 188 to 191, the inkjet heads 186 and 187, the inkjet head 185, and the inkjet heads 181 to 184 are in the opposite directions of the direction indicated 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 the carriage 194 is moved relative to the medium 20 so that the carriage 194 is moved relative to the medium 20.

The method for manufacturing 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 manufacturing method for the multilayer printed matter 10 and the multilayer printed matter 120 by the inkjet printer 80 shown in FIG. However, in the inkjet printer 80 shown in FIG. 14, immediately after the ink ejected by the inkjet heads 181 to 191 landed on the medium 20, the carriage 194 with respect to the medium 20 among the ultraviolet irradiation device 192 and the ultraviolet irradiation device 193. Ultraviolet rays are irradiated and cured by an ultraviolet ray irradiating device on the upstream side in the direction of relative movement in the main scanning direction.

FIG. 15 is a diagram 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 inkjet printer 80, which is different from the examples shown in FIGS. 13 and 14.

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

The inkjet printer 80 shown in FIG. 15 includes ultraviolet irradiation devices 292 to 296 for irradiating the ink ejected by the inkjet heads 281 to 291 with ultraviolet rays. The ultraviolet irradiation device 292 and the ultraviolet irradiation device 293 are arranged at positions sandwiching the inkjet heads 281 to 284 in the direction indicated by the arrow 80b. The ultraviolet irradiation device 293 and the ultraviolet irradiation device 294 are arranged at positions sandwiching the inkjet head 285 in the direction indicated by the arrow 80b. The ultraviolet irradiation device 294 and the ultraviolet irradiation device 295 are arranged at positions sandwiching the inkjet heads 286 and 287 in the direction indicated by the arrow 80b. The ultraviolet irradiation device 295 and the ultraviolet irradiation device 296 are arranged at positions sandwiching the inkjet heads 288 to 291 in the direction indicated by the arrow 80b.

The back layer 34 is printed by the ink ejected by the inkjet heads 281 to 284. The black layer 33 is printed by the ink ejected by the inkjet 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 ejected by the inkjet heads 288 to 291.

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

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

In the inkjet printer 80 shown in FIG. 15, when the multilayer printed matter 10 is manufactured, the inkjet head 281 is moved relative to the inkjet heads 281 to 291 and the ultraviolet irradiation devices 292 to 296 in the direction indicated by the arrow 80c. Ink is ejected toward the medium 20 by 291. In the inkjet printer 80 shown in FIG. 15, when the multilayer printed matter 10 is manufactured, the ink ejected by the inkjet heads 281 to 284, the ink ejected by the inkjet head 285, and the ink ejected by the inkjet heads 286 and 287 are used. Immediately after the ink ejected by the inkjet heads 288 to 291 land on the medium 20 side, the ink is irradiated with ultraviolet rays by the ultraviolet irradiation devices 293, 294, 295, 296, respectively, and is cured.

In the case of manufacturing 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. Inkjet heads 281 to 291 eject ink toward the medium 20. In the inkjet printer 80 shown in FIG. 15, when the multilayer printed matter 120 is manufactured, the ink ejected by the inkjet heads 281 to 284, the ink ejected by the inkjet head 285, and the ink ejected by the inkjet heads 286 and 287 are used. Immediately after the ink ejected by the inkjet heads 288 to 291 land on the medium 20 side, the ink is irradiated with ultraviolet rays by the ultraviolet irradiation devices 292, 293, 294, and 295, respectively, and is cured.

The printing method of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 by the inkjet printer 80 may be a method other than the methods shown in FIGS. 13 to 15.

In the above, a method of manufacturing a multilayer printed matter by forming a print layer group on a medium 20 by an inkjet printer 80 based on print data generated by a computer 90 will be described. Here, the multilayer printed matter may be separated from the portion of the medium 20 other than the multilayer printed matter by a cutting plotter. Hereinafter, a method for producing a multilayer printed matter will be described by forming a print layer group on the medium 20 with an inkjet printer 80 and then separating the multilayer printed matter from a portion of the medium 20 other than the multilayer printed matter by a cutting plotter.

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

FIG. 16 is a flowchart of a method for manufacturing a multilayer printed matter when printing and cutting are executed by the inkjet printer 80 and the registration marks for alignment of cuts are not used.

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 matter by the computer 90 in accordance with the print data created in S301 (S302). Next, the worker creates print cut data by synthesizing the print data created in S301 and the cut data created in S302 by the computer 90 (S303), and the worker creates the print cut data in S303 by the computer 90. It is transmitted to the inkjet printer 80 (S304).

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

Next, the inkjet printer 80 starts printing the print layer group on the medium 20 based on the print data in the print cut data (S306), and determines that the printing of the print layer group on the medium 20 is completed. Until, it is determined whether or not the printing of the print layer group on the medium 20 is completed (S307).

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

Next, the inkjet printer 80 starts cutting the medium 20 by the function of the cutting plotter based on the cut data in 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 or not the cut based on the data is completed (S310).

When the inkjet printer 80 determines in S310 that the cut based on the cut data is completed, the 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 for manufacturing a multilayer printed matter when a register mark is 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 printed matter by the computer 90 (S321), and creates cut data of the multilayer printed matter by the computer 90 in accordance with the print data created in S321 (S322). Next, the worker adds a registration mark matching 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 synthesizing the print data to which the dragonfly is added in S323 and the cut data created in S322 by the computer 90 (S324), and the worker creates the print cut data in S324 by the computer. It is transmitted 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, the inkjet printer 80 stores the origin position in the medium 20 (S326).

Next, the inkjet printer 80 starts printing the print layer group and the registration mark on the medium 20 based on the print data in the print cut data (S327), and finishes printing the print layer group and the registration mark on the medium 20. It is determined whether or not the printing of the print layer group and the registration mark on the medium 20 is completed until it is determined that the printing has been completed (S328).

When the inkjet printer 80 determines in S328 that the printing of the print layer group and the registration marks on the medium 20 has been completed, the inkjet printer 80 stores the medium 20 in S326 in order to return the medium 20 by the amount conveyed by the printing of the print layer group and the registration marks. The medium 20 is moved based on the position of the origin (S329).

Next, the inkjet printer 80 reads the dragonfly printed on the medium 20 (S330), and according to the position of the dragonfly read in S330, the medium is based on the cut data of the print cut data by the function of the cutting plotter. 20 cuts are started (S331), and it is determined whether or not the cut based on the cut data is completed until it is determined that the cut based on the cut data is completed (S332).

When the inkjet printer 80 determines in S332 that the cut based on the cut data is completed, the multilayer printed matter separated from the portion of the medium 20 other than the multilayer printed matter is manufactured.

Next, a method for manufacturing a multilayer printed matter will be described when printing is executed by the inkjet printer 80 and then cutting is executed by a cutting plotter different from that of the inkjet printer 80.

FIG. 18 is a flowchart of a method for manufacturing a multilayer printed matter when the registration mark is not used when the printing is executed by the inkjet printer 80 and then the cutting is executed by a cutting plotter different from the inkjet printer 80.

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

When the inkjet printer 80 receives the print data transmitted from the computer 90 in S343, the inkjet printer 80 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 or not the printing of the print layer group on the medium 20 is completed until it is determined that the printing is completed (S345).

When the inkjet printer 80 determines in S345 that the printing of the print layer group on the medium 20 is completed, 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. It is set in a cutting plotter different from that of the inkjet printer 80 (S346). Here, the operator appropriately sets the medium 20 on the cutting plotter so that the origin position on the medium 20 matches a 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, the cutting plotter starts cutting 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 or not the cut based on the data is completed (S349).

When the cutting plotter determines in S349 that the cut based on the cut data is completed, the multilayer printed matter separated from the portion of the medium 20 other than the multilayer printed matter is manufactured.

FIG. 19 is a flowchart of a method for manufacturing a multilayer printed matter when a dragonfly is used when printing is executed by the inkjet printer 80 and then cutting is executed by a cutting plotter different from that of the inkjet printer 80.

As shown in FIG. 19, the operator creates print data of the multilayer printed matter by the computer 90 (S361), and creates cut data of the multilayer printed matter by the computer 90 in accordance with the print data created in S361 (S362). Next, the worker adds a register mark matching 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 marks are 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, the inkjet printer 80 starts printing the print layer group and the registration mark on the medium 20 based on the print data (S365), and starts printing the print layer on the medium 20. Until it is determined that the printing of the group and the registration mark is completed, it is determined whether or not the printing of the printing layer group and the registration mark on the medium 20 is completed (S366).

When the inkjet printer 80 determines in S366 that the printing of the print layer group and the dragonfly on the medium 20 is completed, the operator transfers the medium 20 on which the print layer group and the dragonfly are printed by the inkjet printer 80 to the inkjet printer 80. It is taken out from the printer and set in a cutting plotter different from that of the inkjet 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 a 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 registration mark printed on the medium 20 (S369), starts cutting the medium 20 based on the cut data according to the position of the registration mark read in S369 (S370), and is based on the cut data. Until it is determined that the cut is completed, it is determined whether or not the cut based on the cut data is completed (S371).

When the cutting plotter determines in S371 that the cut based on the cut data is completed, the multilayer printed matter separated from the 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 concealment printing layers between the surface layer 31 and the back layer 34, light is applied from the surface layer 31 side. When light is not applied to the back layer 34 from the light source 50 on the side opposite to the surface layer 31 side, the light source 50 is on the side opposite to the back layer 34 side with respect to the surface layer 31. Can improve the concealment of the back layer 34 when viewed by the user 60 from the opposite side. That is, the multilayer printed matter 10 and the multilayer printed matter 120 can improve the concealing property of the symbol on the light source 50 side among the plurality of symbols on the front surface side when the light is not applied from the light source 50 on the back surface side.

In the multilayer printed matter 10 and the multilayer printed matter 120, when the white layer 32 and the black layer 33 are compared with the same thickness, the black layer 33 has a higher light-shielding performance than the white layer 32. The same concealment performance can be obtained even if the thickness of the entire concealment print layer is reduced as compared with the case where 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 printed matter. Therefore, when the multilayer printed matter 10 and the multilayer printed matter 120 are exposed to 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 the light shining from the surface layer 31 side is suppressed. It is possible to suppress the amount of light scattered by the concealing print layer when the light applied from the light source 50 passes through the concealment print layer, and as a result, the back layer 34 is sharpened to the surface layer 31 side by the light from the light source 50. It can be seen through. For example, in the multilayer printed matter 10 and the multilayer printed matter 120, when the light shining from the surface layer 31 side is suppressed and the light is applied to the back layer 34 from the light source 50 on the opposite side to the surface layer 31 side. The outline of the pattern in the back layer 34 can be clearly seen through to the surface layer 31 side by the light from the light source 50.

Since the multilayer printed matter 10 and the multilayer printed matter 120 include two concealing printed layers having different light-shielding performances, that is, a white layer 32 and a black layer 33, white having a lower light-shielding performance among the materials of the two concealing printed layers. The same concealment performance can be obtained even if the thickness of the entire concealment print layer is reduced as compared with the case where the concealment print layer is formed only by the material of the layer 32, that is, the white ink. Therefore, the multilayer printed matter 10 and the multilayer printed matter 120 can reduce the amount of ink for printing the concealed printed matter, for example, by reducing the thickness of the entire concealed printed matter. Further, in the multilayer printed matter 10 and the multilayer printed matter 120, depending on the printing method of the concealed printed matter, the printing time of the concealed printed matter can be shortened by reducing the thickness of the entire concealed printed matter. For example, when the positions of the inkjet heads 81 to 86 with respect to the medium 20 in the sub-scanning direction are the same, the number of relative movements of the inkjet heads 81 to 86 with respect to the medium 20 in the main scanning direction, that is, the number of passes is increased. Thereby, when the printing method increases the amount of ink ejected from the inkjet heads 81 to 86 toward the medium 20, the thickness of the entire concealing printing layer is reduced, that is, the ink jet heads 81 to 86 to the medium 20. By reducing the amount of ink ejected toward the surface, the printing time of the concealment printing layer can be shortened.

In the multilayer printed matter 10 and the multilayer printed matter 120, if the light blocking performance of the concealing printed layer on the back layer 34 side (hereinafter referred to as “back layer side concealing printed layer”) is too low, the light from the user 60 side is emitted. That is, when the ambient light is applied, the design of the back layer 34 is easily visually recognized by the user 60. Further, in the multilayer printed matter 10 and the multilayer printed matter 120, if the light blocking performance of the back layer side concealing printed matter is too high, even if light is applied from the light source 50, the back layer is formed by the user 60 from the side opposite to the light source 50 side. The design of 34 is difficult to see. Therefore, in the multilayer printed matter 10 and the multilayer printed matter 120, it is preferable that the black density of the back layer side concealing printed matter is not too low and not too high. For example, in the multilayer printed matter 10 and the multilayer printed matter 120, when the thickness of the medium 20 is reduced, the medium 20 can easily transmit the light from the light source 50, so that the black density of the back layer side concealing printed matter is increased. Is preferable. Further, 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 easily visible by the user 60, so that the back layer side concealment printing is performed. It is preferable to increase the black density of the layer.

In the multilayer printed matter 10 and the multilayer printed matter 120, when the light shining from the surface layer 31 side is suppressed and the light is shined from the light source 50 on the back layer 34 side, the black layer 33 is laminated with respect to the surface layer 31. Since the light from the light source 50 is easily transmitted through the region 10b (see FIG. 6) that does not exist in the surface layer 31, the light is applied from the light source 50 on the back layer 34 side while the light shining from the surface layer 31 side is suppressed. In this case, when the black layer 33 is visually recognized by the user 60 from the side opposite to the light source 50 side, the region 10b in which the black layer 33 does not exist in the stacking direction with respect to the surface layer 31 can be highlighted.

In the multilayer printed matter 10 and the multilayer printed matter 120, in the present embodiment, the portion 33a that does not exist in the stacking direction with respect to the surface layer 31 exists in the black layer 33. However, in the multilayer printed matter 10 and the multilayer printed matter 120, a portion that does not exist in the stacking direction with respect to the surface layer 31 may exist in the white layer 32.

In the multilayer printed matter 10 and the multilayer printed matter 120, the back layer side concealing printed matter is the black layer 33, and even if the back layer side concealing print layer is thin, high light-shielding performance is exhibited. The thickness can be reduced. In the multilayer printed matter 10 and the multilayer printed matter 120, the back layer side concealing printed matter does not have to be black.

In the multilayer printed matter 10 and the multilayer printed matter 120, the concealing print layer on the surface layer 31 side (hereinafter referred to as “surface layer side concealment print layer”) is the white layer 32, and the surface layer side concealment print layer has high brightness. When the surface layer 31 is visually recognized by the user 60 from the side opposite to the light source 50 side when the light is not applied from the light source 50 on the back layer 34 side while the light is shining from the 31 side, the surface layer 31 The brightness of the represented pattern can be improved by the brightness of the printed layer for concealment on the surface layer side. In the multilayer printed matter 10 and the multilayer printed matter 120, the surface layer side concealing printed matter does not have to 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. It can be higher than the printed matter layer. In the multilayer printed matter 10 and the multilayer printed matter 120, the brightness of the white layer 32, which is the surface layer side concealing print layer, is higher than that of the black layer 33, which is the back layer side concealing print layer. When the surface layer 31 is visually recognized by the user 60 from the side opposite to the light source 50 side when the light source 50 on the back layer 34 side is not illuminated, the brightness of the pattern represented by the surface layer 31 is set to the white layer 32. It can be improved by the brightness of.

In the multilayer printed matter 10 and the multilayer printed matter 120, the back layer side concealing printed matter has higher light-shielding performance than the back layer side concealing printed layer when compared with the same thickness as the front layer side concealing printed layer, and reflects light. Performance is low. Differences in light-shielding performance and light reflection performance can be realized by differences in materials, and even if the same material is used, differences in structure can also be realized. Here, the difference in structure is, for example, a difference in the size and content of particles contained in the ink.

In the multilayer printing method shown in FIGS. 13 to 15, the medium 20 is directed to the inkjet heads 81 to 86, the inkjet heads 181 to 191 and the inkjet heads 281 to 291 in a specific direction in the sub-scanning direction indicated by the arrow 80b, respectively. Since the four layers of the surface layer 31, the white layer 32, the black layer 33, and the back layer 34 can be printed at the same time only by moving them relative to each other, each printing is compared with the method of printing each printing layer in order for all areas. The positional accuracy between the layers can be improved, and the high-quality multilayer printed matter 10 and the multilayer printed matter 120 can be manufactured.

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

10 Multi-layer printed matter 10a Arrow (arrow indicating the stacking direction)
20 Medium 30 Print layer group 31 Surface layer (first pattern print layer)
32 White layer (first concealment printing layer)
33 Black layer (second concealment printing layer)
33a part (a part that does not exist in the stacking direction with respect to the first pattern print layer)
34 Back layer (second pattern printing layer)
80 Inkjet printer 80a Arrow (arrow indicating the main scanning direction)
80b arrow (arrow indicating the sub-scanning direction)
80c arrow (arrow indicating one specific direction of the sub-scanning direction, arrow indicating the opposite direction of the specific direction)
81-86 Inkjet heads 81a, 82a, 83a, 84a region (fourth head)
84b area (third head)
85c, 86c area (second head)
81d, 82d, 83d, 84d areas (first head)
120 Multi-layer printed matter 181 to 184 Inkjet head (fourth head)
185 Inkjet head (third head)
186-187 Inkjet head (second head)
188-191 Inkjet head (first head)
281 to 284 Inkjet head (4th head)
285 Inkjet head (third head)
286-287 Inkjet head (second head)
288-291 Inkjet head (first head)

Claims (8)

The first design print layer and the second design print layer on which the design is printed, and
The second symbol print layer is concealed from the first symbol print layer side by being arranged between the first symbol print layer and the second symbol print layer, and the first symbol print is performed. A first concealment printing layer for reflecting light incident from the layer side to visually recognize the first pattern printing layer from the first pattern printing layer side, and a printing layer for concealment.
A second concealment printer arranged between the first concealment print layer and the second pattern print layer to conceal the second symbol print layer from the first symbol print layer side. A print layer group including a print layer is formed on the medium.
The second concealment print layer has higher light-shielding performance than the first concealment print layer when compared with the first concealment print layer with the same thickness.
At least one of the first concealment print layer and the second concealment print layer is a multilayer printed matter characterized in that a part thereof does not exist in the stacking direction with respect to the first pattern print layer . The first concealment print layer and the second concealment print layer are
Light is applied to the multilayer printed matter from a light source opposite to the first symbol printing layer side with respect to the second symbol printing layer in a state where the light is shining on the multilayer printed matter from the first symbol printing layer side. When the multilayer printed matter is visually recognized 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 light is applied to the multilayer printed matter from the light source while the light hitting the multilayer printed matter is suppressed from the first symbol printing layer side, the second pattern printing layer is exposed to the light. When the multilayer printed matter is visually recognized from the side opposite to the design printing layer side, the second design printing layer is made visible through the first design printing layer side by the light applied from the light source. The multilayer printed matter according to claim 1. The first design print layer and the second design print layer on which the design is printed, and
The second symbol print layer is concealed from the first symbol print layer side by being arranged between the first symbol print layer and the second symbol print layer, and the first symbol print is performed. A first concealment printing layer for reflecting light incident from the layer side to visually recognize the first pattern printing layer from the first pattern printing layer side, and a printing layer for concealment.
A second concealment printer arranged between the first concealment print layer and the second pattern print layer to conceal the second symbol print layer from the first symbol print layer side. A print layer group including a print layer is formed on the medium.
The second concealment print layer has higher light-shielding performance than the first concealment print layer when compared with the first concealment print layer with the same thickness.
The second concealment print layer is a multilayer printed matter having a thickness thinner than that of the first concealment print layer. The multilayer printed matter according to any one of claims 1 to 3, wherein the second concealment printed layer is a black layer. The multilayer printed matter according to claim 4, wherein the first concealment print layer is a white layer. The first design print layer and the second design print layer on which the design is printed, and
The second symbol print layer is concealed from the first symbol print layer side by being arranged between the first symbol print layer and the second symbol print layer, and the first symbol print is performed. A first concealment printing layer for reflecting light incident from the layer side to visually recognize the first pattern printing layer from the first pattern printing layer side, and a printing layer for concealment.
A second concealment printer arranged between the first concealment print layer and the second pattern print layer to conceal the second symbol print layer from the first symbol print layer side. A print layer group including a print layer is formed on a medium, and the print layer group is formed on the medium.
The second concealment print layer has higher light-shielding performance than the first concealment print layer when compared with the first concealment print layer with the same thickness.
A multilayer printing method characterized in that at least one of the first concealment printing layer and the second concealment printing layer does not exist in a part in the stacking direction with respect to the first pattern printing layer. The print layer group includes a first head as an inkjet head for ejecting ink for forming the first pattern print layer, and an inkjet head for ejecting ink for forming the first concealment print layer. The second head as an inkjet head for ejecting ink for forming the second concealing print layer, and the ink for forming the second pattern print layer. Formed by an inkjet printer with a fourth head as an inkjet head
The first head, the second head, the third head, and the fourth head are the first head, the second head, and the second head from upstream to downstream in a specific direction. The head of 3 and the fourth head are arranged in this order.
The first head, the second head, the third head, the fourth head, and the other with respect to one of the media, the specific direction and the direction opposite to the specific direction. The multilayer printing method according to claim 6, wherein the print layer group is formed by relatively moving the print layer group in only one of the above directions. The first head, the second head, the third head, the fourth head, and the first head when the other is relatively moved in the main scanning direction with respect to one of the media. Ink is ejected toward the medium by the second head, the third head, and the fourth head.
The first head, the second head, the third head, and the fourth head have the same length of the ejection region in the sub-scanning direction orthogonal to the main scanning direction, and the sub-scanning has the same length. They are arranged so as to be offset by the length of the discharge region in the direction.
The specific direction is one of the sub-scanning directions.
Each time printing by the first head, the second head, the third head, and the fourth head in the main scanning direction is completed, the first head, the second head, and the second head are finished. A claim characterized in that the medium is relatively moved with respect to the head of 3 and the 4th head in a specific one of the sub-scanning directions by the length of the ejection region in the sub-scanning direction. Item 7. The multilayer printing method according to Item 7.

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