CN111629907B - Printed matter, reading device, reading method, printing method, and printing device - Google Patents
Printed matter, reading device, reading method, printing method, and printing device Download PDFInfo
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- CN111629907B CN111629907B CN201880086105.XA CN201880086105A CN111629907B CN 111629907 B CN111629907 B CN 111629907B CN 201880086105 A CN201880086105 A CN 201880086105A CN 111629907 B CN111629907 B CN 111629907B
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- Prior art keywords
- substance
- printing
- titanium oxide
- type titanium
- latent image
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/02—Inorganic compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/20—Pills, tablets, discs, rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
Abstract
In the printed matter on which the latent image is formed, the latent image can be read well. A tablet (9) as a printed matter has an object to be printed, a base layer (93), and a latent image layer (92). The base layer (93) is formed on the surface of the object to be printed and contains anatase titanium oxide (first substance) having a property of absorbing invisible light of a specific wavelength. The latent image layer (92) is printed on the base layer (93), and contains rutile titanium oxide (second substance) having a property of absorbing invisible light of a wavelength different from the specific wavelength.
Description
Technical Field
The invention relates to a printed matter, a reading device, a reading method, a printing method, and a printing device.
Background
Conventionally, there is known a technique of printing a latent image on a printed matter using an ink for hiding that changes in hue by irradiation with invisible light. For example, patent document 1 discloses an ink used for such a printed matter.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2011-
The ink described in patent document 1 contains riboflavin as a distinguishable dye, and develops color by changing the color phase upon irradiation with ultraviolet light. In addition, in the printed matter using the ink described in patent document 1, the printed surface exhibits clear yellowish-white fluorescence under ultraviolet irradiation, and thus can be recognized by a difference in light emission from the printing substrate.
As described above, in recent years, for various purposes, techniques such as a printed matter in which printed contents can be recognized only under specific ambient light, and a reading device that reads the printed matter have been required. As a specific example, in the medical field, a technique of printing information inherent to a tablet on a surface of the tablet taken by a consumer is attracting attention. As the information printed on the surface of the tablet, for example, there are included: information to be displayed to the consumer such as the name of the drug and the content of the active ingredient, and information not to be displayed to the consumer, which is management information that the manufacturer or pharmacist of the tablet only wants to confirm. Therefore, it is considered that information which is not desired to be displayed to the consumer is printed as a latent image. Further, as the management information, for example, there are: the lot number of the tablet, the expiration date, a verification code for preventing counterfeit drugs, and the like.
Disclosure of Invention
Problems to be solved by the invention
However, in many cases, among tablets as a pharmaceutical product, particularly, in a Film (FC) tablet or a sugar-coated tablet whose surface is coated, a substance having a property of absorbing invisible light of a specific wavelength (e.g., anatase-type titanium oxide) is contained in the coated surface layer. Therefore, in the tablet, when a latent image is formed on the surface of the tablet using the special ink described above, it is difficult to read information of the latent image because the invisible light of a specific wavelength is absorbed by both the surface layer of the tablet of the latent image and the background thereof.
The present invention has been made in view of the above circumstances, and a potential object thereof is to enable a latent image to be read well on a printed matter on which the latent image is formed.
Technical scheme for solving problems
In order to solve the problems of the present invention as described above, a description will be given of a solution to the problems.
In a first aspect of the present application, there is provided a printed matter including an object to be printed, a base layer, and a latent image layer. The base layer is formed on a surface of the object to be printed, and contains a first substance having a property of absorbing invisible light of a specific wavelength. The latent image layer is printed on the base layer and contains a second substance having a property of absorbing invisible light of a wavelength different from the specific wavelength.
In a second aspect of the present application, in the printed matter according to the first aspect, the first substance is one of anatase-type titanium oxide and rutile-type titanium oxide, and the second substance is the other of anatase-type titanium oxide and rutile-type titanium oxide.
In a third aspect of the present application, in the printed matter of the second aspect, the first substance is anatase-type titanium oxide, and the second substance is rutile-type titanium oxide.
In a fourth aspect of the present application, in the printed matter according to the second or third aspect, the object to be printed is a granular object to be taken by a consumer as a tablet.
In a fifth aspect of the present application, in the printed matter according to any one of the first to fourth aspects, the latent image layer is printed by an ink jet method.
In a sixth aspect of the present application, there is provided a reading apparatus for reading a printed matter having the following configuration. That is, the printed matter is configured by printing a latent image layer containing a second substance on a base layer containing a first substance on a surface thereof, wherein the first substance has a property of absorbing invisible light of a specific wavelength, and the second substance has a property of absorbing invisible light of a wavelength different from the specific wavelength. The reading apparatus includes an irradiation section and an imaging section. The irradiation unit irradiates, onto the surface of the printed matter, invisible light having a wavelength that is absorbed by one of the first substance and the second substance and is not absorbed by the other of the first substance and the second substance. The imaging unit images an invisible light image that is an image formed by receiving only invisible light of visible light and invisible light.
In a seventh aspect of the present application, the reading device according to the sixth aspect further comprises an image reading unit that reads information contained in the latent image layer from an imaging result of the imaging unit.
In an eighth aspect of the present application, in the reading apparatus according to the sixth or seventh aspect, the first substance is one of anatase-type titanium oxide and rutile-type titanium oxide, and the second substance is the other of anatase-type titanium oxide and rutile-type titanium oxide.
In a ninth aspect of the present application, in the reading apparatus of the eighth aspect, the irradiation section irradiates invisible light of a wavelength range from 360nm to 400nm to the surface of the printed matter.
In a tenth aspect of the present application, there is provided a reading method of reading a printed matter having the following configuration. That is, the printed matter is configured by printing a latent image layer containing a second substance on a base layer containing a first substance on a surface thereof, wherein the first substance has a property of absorbing invisible light of a specific wavelength, and the second substance has a property of absorbing invisible light of a wavelength different from the specific wavelength. The reading method includes a) step and b) step. In the step a), the surface of the printed matter is irradiated with invisible light having a wavelength that is absorbed by one of the first substance and the second substance and is not absorbed by the other of the first substance and the second substance. In the step b), an invisible light image, which is an image formed by receiving only invisible light of visible light and invisible light, is captured.
In an eleventh aspect of the present application, there is provided a printing method of the following configuration. That is, the latent image layer is printed on the base layer having a surface containing the first substance having a property of absorbing the invisible light of the specific wavelength. The printing method includes the following steps c) and d). In the step c), the object to be printed having the base layer is conveyed so that the base layer is on the surface. In the step d), the latent image layer is formed on the base layer of the printing object by an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength.
In a twelfth aspect of the present application, in the printing method of the eleventh aspect, the object to be printed is a granular object to be taken as a tablet by a consumer.
In a thirteenth aspect of the present application, there is provided a printing method of the following configuration. That is, the surface of the printing object is printed. The printing method comprises the following steps e) and f) and g). In the step e), the printing object is conveyed so that the surface on which the printing object is printed is on the surface. In the step f), an underlayer is formed on the surface of the object to be printed by an ink containing a first substance having a property of absorbing invisible light of a specific wavelength. In the step g), a latent image layer is formed on the base layer of the printing object by an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength.
In a fourteenth aspect of the present application, in the printing method according to the thirteenth aspect, the printing object is a long belt-shaped or sheet-shaped (japanese "ben-ye-shaped") substrate.
In a fifteenth aspect of the present application, there is provided a printing apparatus configured as follows. That is, the latent image layer is printed on the base layer having the first substance absorbing the invisible light of the specific wavelength on the surface. The printing apparatus includes a conveyance mechanism and a printing section. The carrying mechanism carries the printing object having the base layer so that the base layer is on the surface. The printing unit forms the latent image layer on the base layer of the printing object by using ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength.
In a sixteenth aspect of the present application, in the printing apparatus of the fifteenth aspect, the object to be printed is a granular object to be taken by a consumer as a tablet. The pellet has the substrate layer on its surface.
In a seventeenth aspect of the present application, in the printing apparatus according to the sixteenth aspect, the printing section forms the latent image layer by an ink jet method.
In an eighteenth aspect of the present application, there is provided a printing apparatus configured as follows. That is, the surface of the printing object is printed. The printing device includes: a conveying mechanism, a first printing portion, and a second printing portion. The conveying mechanism conveys the printing object in a manner that the surface of the printing side of the printing object is positioned on the surface. The first printing unit forms a base layer on the surface of the object to be printed by using ink containing a first substance having a property of absorbing invisible light of a specific wavelength. The second printing unit forms a latent image layer on the base layer of the printing object by using an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength.
In a nineteenth aspect of the present application, in the printing apparatus according to the seventeenth aspect, the object to be printed is a long strip-shaped or sheet-shaped base material.
Effects of the invention
According to the first to nineteenth aspects of the present application, the latent image layer can be satisfactorily read on the printed matter on which the latent image layer is formed.
In particular, according to the first aspect of the present application, the information on the latent image layer can be read by confirming the invisible light image of the printed matter in a state where the invisible light having the wavelength which is not absorbed by the first substance but absorbed by the second substance is irradiated or in a state where the invisible light having the wavelength which is not absorbed by the second substance but absorbed by the first substance is irradiated.
In particular, according to the second aspect of the present application, information printed as a latent image layer can be read by utilizing the difference in the absorption wavelength between anatase-type titanium oxide and rutile-type titanium oxide.
In particular, according to the third aspect of the present invention, when the invisible image of the printed matter is confirmed in a state where the invisible light of a specific wavelength is irradiated, which is not absorbed by the anatase type titanium oxide but absorbed by the rutile type titanium oxide, the latent image layer is clearly seen in a darker color than the base layer. This makes it possible to easily read information of the latent image layer.
In particular, according to the fourth, twelfth or sixteenth aspect of the present application, for example, information that can be confirmed only by a specific relationship other than the consumer can be printed as a latent image layer on the surface layer of the tablet. This can prevent information beyond necessity from entering the visual field of the consumer viewing the tablet and causing confusion.
According to the fifth aspect of the present invention, a fine latent image layer can be formed by an ink-jet method.
In addition, according to the sixth aspect of the present application, by checking the invisible light image, it is possible to read the latent image layer superimposed on the background layer.
In particular, according to the seventh aspect of the present application, information of the latent image layer can be automatically read.
In particular, according to the eighth aspect of the present application, the information on the latent image layer can be read by utilizing the difference in the absorption wavelength between the anatase type titanium oxide and the rutile type titanium oxide.
In particular, according to the ninth aspect of the present invention, by irradiating the invisible light having a wavelength range of 360nm to 400nm, which is absorbed by the rutile type titanium oxide while being hardly absorbed by the anatase type titanium oxide, and confirming the invisible light image of the printed matter, it is possible to read the information of the printed matter by the contrast between the latent image layer and the underlayer.
In addition, according to the tenth aspect of the present application, by checking the invisible light image, it is possible to read information of the latent image layer printed on the background layer.
In addition, according to the eleventh aspect of the present application, for example, information that can be confirmed only by a specific relationship other than the consumer of the printed matter can be printed so as to be visible only under specific ambient light.
In addition, according to a thirteenth aspect of the present invention, the base layer is formed on the surface of the object to be printed by printing, and the latent image layer is further formed on the base layer. This makes it possible to print information expressed by the contrast between the base layer and the latent image layer so as to be visible only under specific ambient light.
In particular, according to the fourteenth or eighteenth aspect of the present application, for example, information that can be confirmed only by a specific relationship person other than the consumer is printed on the surface of the long strip-shaped or sheet-shaped base material so as to be visible only under specific ambient light. This prevents information beyond necessity from entering the field of view of the consumer who observes the surface of the long strip-shaped or sheet-shaped base material, thereby causing confusion.
In addition, according to a fifteenth aspect of the present application, a latent image layer is printed on the base layer. This makes it possible to print information expressed by the contrast between the base layer and the latent image layer so as to be visible only under specific ambient light.
In addition, according to the seventeenth aspect of the present application, a fine latent image layer can be formed on the surface of the particulate matter by an ink jet system.
In an eighteenth aspect of the present invention, a base layer is printed on a surface of a printing object, and a latent image layer is further printed on the base layer. This makes it possible to print information expressed by the contrast between the base layer and the latent image layer so as to be visible only under specific ambient light.
In particular, according to the nineteenth aspect of the present invention, it is possible to print specific information on a long strip-shaped or sheet-shaped base material so as to be visible only under specific ambient light.
Drawings
Fig. 1 is a diagram showing an overall configuration of a printing apparatus according to a first embodiment.
Fig. 2 is a partial perspective view of a conveyance mechanism provided in the printing apparatus.
Fig. 3 is a bottom view of the head provided in the printing apparatus.
Fig. 4 is a block diagram showing connections between the control unit and each unit in the printing apparatus.
Fig. 5 is a view showing an example of a tablet on which a colored image layer and a latent image layer are printed.
Fig. 6 is a view showing a state in which the tablet shown in fig. 5 is observed under specific ambient light.
Fig. 7 is a diagram showing a configuration of the reading apparatus according to the first embodiment.
The upper row of fig. 8 is a photograph showing an invisible light image obtained as a result of the experiment in the example, which was taken of the surface of the tablet. The lower row is a photograph showing an invisible light image obtained as a result of the experiment of the comparative example, which was taken of the surface of the tablet.
Fig. 9 is a diagram showing the overall configuration of the printing apparatus according to the second embodiment.
Fig. 10 is a view showing an example of a long belt-shaped base material on which a white base layer and a latent image layer are printed.
Fig. 11 is a view showing a state in which the long strip-shaped base material shown in fig. 10 is observed under specific ambient light.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, a direction in which a plurality of tablets are conveyed is sometimes referred to as a "conveying direction", and a direction perpendicular to the conveying direction and horizontal is sometimes referred to as a "width direction".
< 1. first embodiment >
< 1-1 > about printing device
A printing apparatus 1 according to a first embodiment of the present invention will be described below with reference to fig. 1 to 4.
Fig. 1 is a diagram schematically showing the overall configuration of a printing apparatus 1 according to a first embodiment. The printing apparatus 1 is an apparatus that prints an image on the surface of each tablet 9 by an inkjet method while conveying a plurality of tablets (granular materials) 9 in the form of granules to be taken by a consumer. The tablet 9 is a printing object (printing object) of the present embodiment. As shown in fig. 1, the printing apparatus 1 of the present embodiment mainly includes: a conveyance mechanism 10, a color printing section 20, a latent image printing section (printing section) 30, a drying mechanism 40, and a control section 50.
The conveying mechanism 10 is a mechanism that holds and conveys a plurality of tablets 9. The conveying mechanism 10 includes a pair of pulleys 11 and an endless conveying belt 12 stretched between the pair of pulleys 11. The plurality of tablets 9 loaded into the printing apparatus 1 are arranged at equal intervals by a loading mechanism 101 composed of a vibrating feeder, a conveying roller, or the like, and are supplied to the outer peripheral surface of the conveying belt 12. One of the pair of pulleys 11 is rotated by power received from the conveyance motor 13. Thereby, the conveying belt 12 rotates in the arrow direction in fig. 1. At this time, the other of the pair of pulleys 11 is driven to rotate in accordance with the rotation of the conveyor belt 12.
Fig. 2 is a partial perspective view of the conveyance mechanism 10. As shown in fig. 2, the conveyor belt 12 is provided with a plurality of suction holes 14. The plurality of suction holes 14 are arranged at equal intervals in the conveying direction and the width direction. As shown in fig. 1, the conveying mechanism 10 includes a suction mechanism 15 for sucking gas from the space inside the conveying belt 12. When the suction mechanism 15 is operated, the space inside the conveyor belt 12 becomes a negative pressure lower than the atmospheric pressure. The tablets 9 are sucked and held in the suction holes 14 by the negative pressure.
In this way, the conveying mechanism 10 holds the plurality of tablets 9 at a constant interval in the plurality of suction holes 14, and conveys the plurality of tablets 9 by the rotation of the conveyor belt 12. The plurality of tablets 9 are conveyed in the horizontal direction to below the color printing section 20 and the latent image printing section 30.
As shown in fig. 1, the conveying mechanism 10 includes a blowing mechanism 16 inside the conveying belt 12. When the blowing mechanism 16 is operated, only the suction holes 14 facing the carrying-out mechanism 102 among the plurality of suction holes 14 of the conveyor belt 12 have a positive pressure higher than the atmospheric pressure. Thereby, the adsorption of the tablet 9 in the adsorption hole 14 is released, and the tablet 9 is transferred from the conveying belt 12 to the carrying-out mechanism 102. The carrying-out mechanism 102 carries out the tablets 9 transferred from the conveyor belt 12 to the outside of the printing apparatus 1 by, for example, another conveyor belt.
The color printing portion 20 shown in fig. 1 is a portion for recording a color image layer on the surface of the tablet 9 conveyed by the conveyor belt 12. The color image layer is an image layer that can be seen by a consumer under normal ambient light, and includes information to be displayed to the consumer, such as the product name, company name, trademark, and content of active ingredient of the tablet 9. Here, the normal ambient light condition means an ambient light condition in daily life, for example, a white light condition. As shown in fig. 1, the color printing section 20 of the present embodiment includes three heads 21. The three heads are positioned above the conveyor belt 12 and arranged in a row along the conveying direction of the tablets 9. Each head 21 ejects colored ink that can be visually recognized under normal ambient light toward the surface of the tablet 9. For example, the three heads 21 eject ink droplets of cyan, magenta, and black, respectively. As a result, a colored image layer, i.e., a multicolor image layer, is printed on the surface of the tablet 9. However, the color of the ink ejected from the plurality of heads 21 is not limited to this. The colors of the inks discharged from the heads 21 need not all be different colors, and the colors of the inks discharged from some of the heads may be the same.
In addition, edible ink made of a material approved by the japanese food sanitation act or japanese pharmaceutical affairs act is used as the ink to be discharged from each head 21.
Fig. 3 is a bottom view of one of the heads 21. In fig. 3, the two-dot chain line indicates the conveyor belt 12 and the plurality of tablets 9 held by the conveyor belt 12. As shown in an enlarged view in fig. 3, a plurality of nozzles 211 capable of ejecting ink droplets are provided on the ejection surface 210 which is the lower surface of the head 21. In the present embodiment, a plurality of nozzles 211 are two-dimensionally arranged in the conveyance direction and the width direction on the lower surface of the head 21. When the nozzles 211 are two-dimensionally arranged, the positions of the nozzles 211 in the width direction can be made close to each other. However, the plurality of nozzles 211 may be arranged in a row in the width direction.
As an ejection method for ejecting ink droplets from the nozzles 211, for example, a so-called piezoelectric method is used, in which ink in the nozzles 211 is pressurized and ejected by applying a voltage to a piezoelectric element (PIEZO element) to deform the PIEZO element. However, the ink droplets may be ejected by a so-called thermal method, that is, a method in which the ink in the nozzle 211 is pressurized and expanded by applying a current to a heater.
The latent image printing section 30 shown in fig. 1 is a portion for recording an image that is difficult for a consumer to visually recognize under normal ambient light on the surface of the tablet 9 conveyed by the conveyor belt 12. The color of the image recorded by the latent image printing portion 30 may be a color that is difficult to visually recognize with respect to the color of the surface of the tablet 9, and may be, for example, colorless and transparent. The latent image printed by the latent image printing section 30 includes management information that can be confirmed only by a specific relationship person such as a manufacturer or a pharmacist. The management information may include various information such as a lot number of the tablet 9, a valid period, a manufacturing factory, a contained component, a verification code for preventing counterfeit drugs, and the like. The latent image printing section 30 of the present embodiment includes one head 31. The head 31 is disposed above the conveyor belt 12 and on the downstream side in the conveying direction from the three heads 21 of the color printing section 20. In the present embodiment, the head 31 of the latent image printing portion 30 ejects ink of a color that is invisible to the consumer toward the surface of the tablet 9. As a result, a latent image layer having a stealth purpose, which is difficult for a consumer to visually recognize under normal ambient light, is printed on the surface of the tablet 9. In the following description, ink of a color that is difficult for a consumer to visually recognize in order to print a latent image layer is sometimes referred to as "latent image ink".
The ink ejected from the head 31 is edible ink made of a material approved by the japanese food sanitation act or the japanese pharmaceutical affairs act. The components of the ink will be described later. The structure of the head 31 is the same as that of the head 21 shown in fig. 3. That is, the head 31 ejects ink droplets from the plurality of nozzles 211 provided on the lower surface.
The drying mechanism 40 is a mechanism for drying the ink adhering to the surface of the tablet 9. The drying mechanism 40 is provided around the conveyor belt 12 at a position downstream of the latent image printing unit 30 in the conveying direction. The drying mechanism 40 uses, for example, a hot air supply mechanism that blows heated gas (hot air) toward the tablet 9 conveyed by the conveyor belt 12. The ink ejected from the color printing section 20 and the latent image printing section 30 is dried by hot air and fixed on the surface of the tablet 9.
In addition to the drying mechanism 40, a drying mechanism (intermediate drying mechanism) is provided between the color printing portion 20 and the latent image printing portion 30. Further, only the color ink constituting the color image layer may be dried in an intermediate drying mechanism before printing the latent image layer.
The control unit 50 shown in fig. 1 and 4 is a device for controlling the operation of each unit in the printing apparatus 1. Fig. 4 is a block diagram showing connections between the control unit 50 and the respective units in the printing apparatus 1. As schematically shown in fig. 4, the control unit 50 is constituted by a computer having a processor 51 such as a CPU, a memory 52 such as a RAM, and a storage unit 53 such as a hard disk drive. A computer program P for executing a printing process is installed in the storage unit 53.
As shown in fig. 4, the control unit 50 is communicably connected to the transport motor 13, the suction mechanism 15, the blowing mechanism 16, the three heads 21 of the color printing unit 20, the head 31 of the latent image printing unit 30, the drying mechanism 40, the carrying-in mechanism 101, and the carrying-out mechanism 102, respectively. The control unit 50 temporarily reads the computer program P and data stored in the storage unit 53 into the memory 52, and performs arithmetic processing by the processor 51 based on the computer program P to control the operations of the above-described units. In this way, the plurality of tablets 9 are subjected to the printing process by cooperation of hardware and software.
< 1-2 > about tablets as prints
Next, referring to fig. 5 and 6, a tablet 9, which is a printed matter having a surface printed by using the printing apparatus 1 of the present embodiment, will be described in more detail. Fig. 5 is a state diagram showing the surface of tablet 9 when observed under normal ambient light.
Here, the colored image layer 91 formed by the colored ink discharged from the head 21 is printed clearly so as to be easily visible to the consumer under normal ambient light. In the example shown in fig. 5, a character string of "tagelta" which is a product name and a character string of "200 mg" which indicates the content of the effective ingredient are printed on the surface of the TABLET 9 as the colored image layer 91.
A latent image layer 92 formed by the latent image ink discharged from the head 31 is formed to overlap a part of the surface layer side of the base layer 93 of the tablet 9. The latent image layer 92 is printed so as to be hardly visible to the consumer under normal ambient light, for example, so as to be colorless and transparent (see fig. 5). In other words, the latent image layer 92 is printed as a latent image for invisibility on the base layer 93.
The latent image ink constituting the latent image layer 92 is constituted to contain rutile titanium oxide (second substance) having a property of absorbing invisible light having a wavelength different from the specific wavelength (388nm or less). Specifically, the wavelength range of invisible light that can be absorbed by the rutile titanium oxide is 413nm or less, including a part of the wavelength range that is not included in the specific wavelength (388nm or less).
The rutile titanium oxide contained in the latent image ink may be, for example, commercially available rutile titanium oxide. Examples of such commercially available products include: STR-100N (trade name, rutile type made by Sakai chemical industry Co., Ltd.), TTO-51A (trade name, Sakai chemical industry Co., Ltd.), TTO-55A (trade name, Sakai chemical industry Co., Ltd.), rutile type), TTO-80A (trade name, Sakai chemical industry Co., Ltd.), rutile type), MPT-140 (trade name, Sakai industry Co., Ltd., rutile type), MPT-141 (trade name, Sakai chemical industry Co., Ltd., rutile type), MKR-1 (trade name, Sakai chemical industry Co., Ltd., rutile type), and the like.
The rutile titanium oxide particles contained in the latent image ink preferably have an average primary particle diameter (volume average particle diameter) of 20nm to 400nm, more preferably 30nm to 200nm, and particularly preferably 40nm to 100 nm. This can improve the invisibility of the latent image ink containing the rutile titanium oxide particles under normal ambient light.
As described above, the consumer of tablet 9 can hardly recognize the latent image layer 92 under normal ambient light. However, a manufacturer of the tablet 9, a pharmacist, or other specific relationship can check the information contained in the latent image layer 92 using the reading device 2 (see fig. 6) described later. Fig. 6 is an image showing a state in which the tablet 9 on which the two-dimensional code is printed as the latent image layer 92 is observed under specific ambient light. Hereinafter, an image showing a state observed under such specific ambient light may be referred to as an "invisible light image".
As described above, in the present embodiment, information that can be confirmed only by a specific relationship person other than the consumer is printed as the latent image layer 92 on the surface layer of the tablet 9 using, for example, a latent image ink having low visibility such as colorless transparency. This reduces the amount of information entering the field of view of the consumer, prevents confusion of the consumer, and allows more information to be shown to a specific relationship.
Since the printing system of the printing apparatus 1 is an ink jet system, a fine image layer can be printed on the surface of the base layer 93 of the tablet 9 by ink droplets discharged from the heads 21 and 31.
< 1-3 > related to the reading apparatus
Next, a reading device 2 for reading information included in an image printed on the tablet 9 will be described. Fig. 7 is a diagram schematically showing the structure of the reading apparatus 2. A manufacturer of the tablet 9, a pharmacist, or other specific relation can confirm the information contained in the latent image layer 92 using the reading device 2. As shown in fig. 7, the reading device 2 mainly includes an imaging device 60, an information acquisition unit (image reading unit) 70, and a display unit 80.
The imaging device 60 is a device capable of imaging at least the latent image layer 92 and the peripheral portion thereof on the surface of the tablet 9 under a specific ambient light. As shown in fig. 7, the imaging device 60 includes: a light irradiation section (irradiation section) 61, a camera 62, and a filter 63. The configuration in which the camera 62 and the filter 63 are integrated corresponds to the "imaging unit" in the present embodiment.
The light irradiation unit 61 is a light source that irradiates the surface of the tablet 9, which is a printed matter to be imaged, with invisible light having a specific imaging wavelength (360nm to 400nm in the present embodiment). In other words, the light irradiation section 61 of the present embodiment irradiates the region where the latent image layer 92 of the tablet 9 is formed and the peripheral portion thereof with ultraviolet light having a wavelength ranging from 360nm to 400 nm. Herein, the invisible light in the wavelength range of 360nm to 400nm is hardly absorbed by the anatase titanium oxide, but is well absorbed by the rutile titanium. Therefore, when the tablet 9 is irradiated with the invisible light of the specific photographing wavelength from the light irradiation section 61, the invisible light is absorbed by the latent image layer 92 because rutile-type titanium oxide is present on the surface of the portion on which the latent image layer 92 is printed. On the other hand, since the anatase titanium oxide is present on the surface of the exposed portion of the underlayer 93 in the periphery of the latent image layer 92, most of the irradiated invisible light is reflected or transmitted by the underlayer 93. The tablet 9 thus irradiated with the invisible light is photographed by the camera 62 as follows.
The camera 62 is a device for photographing the tablet 9. A filter 63 is provided immediately outside the imaging lens of the camera, and the filter 63 blocks visible light and transmits only invisible light (ultraviolet light). With such a configuration, the camera 62 receives only the invisible light and captures the invisible light image I. In other words, the filter 63 is provided in front of the camera 62, and functions as an ultraviolet camera. In the invisible light image I obtained by imaging the tablet 9 with the camera 62, at the portion where the latent image layer 92 is printed, the invisible light is hardly reflected and appears in a relatively dark (dark) color because the invisible light is absorbed by the latent image layer 92. On the other hand, in the exposed portion of the underlayer 93 around the latent image layer 92, most of the irradiated invisible light is reflected or transmitted by the underlayer 93, and thus appears as a relatively light (bright) color.
The information acquisition unit (image reading unit) 70 is a processing unit that acquires information from the imaging result of the camera 62. The information acquiring unit 70 is, for example, a computer having a processor and a memory. The information acquisition unit 70 automatically extracts information indicating the contrast (shading) between the base layer 93 and the latent image layer 92 by performing image processing on the invisible light image I, which is the result of the image taken by the camera 62. Then, the extracted information is directly displayed on the display unit 80 as an image including information such as a two-dimensional code or converted into readable other information. The display unit 80 uses, for example, a liquid crystal display. Fig. 6 shows an example in which the two-dimensional code of the latent image layer 92 is converted into a character string "20170404" and displayed on the display unit 80.
With the use of such a reading apparatus 2, the latent image layer 92 that is difficult to see under normal ambient light can be made visible on the invisible image I. Therefore, a manufacturer of the tablet 9, a pharmacist, or the like can easily read the information contained in the latent image layer 92.
As described above, the tablet 9 as a printed matter of the present embodiment includes the underlayer 93 containing anatase titanium oxide on the surface, wherein the anatase titanium oxide has a property of absorbing ultraviolet rays having a specific wavelength. The latent image layer 92 is formed by discharging a latent image ink containing rutile titanium oxide having a property of absorbing ultraviolet rays having a wavelength different from that of the anatase titanium oxide onto the undercoat layer 93.
Thus, the information of the latent image layer 92 can be read by confirming the invisible light image I (see fig. 6) of the tablet 9 in a state of being irradiated with ultraviolet rays having a wavelength of 360nm to 400nm which is absorbed well by the rutile type titanium oxide while being hardly absorbed by the anatase type titanium oxide.
The printing method for printing on the tablet 9 as the printing object by using the printing apparatus 1 of the present embodiment includes the following steps c) and d). The printing method is as follows: the latent image layer 92 is printed on the base layer 93 containing anatase titanium oxide having a property of absorbing ultraviolet rays having a specific wavelength (388nm or less) on the surface thereof so as to be superimposed thereon. In step c), the tablet 9 having the base layer 93 is conveyed so that the base layer 93 is on the surface (see fig. 1). In the step d), a latent image layer 92 is formed by discharging a latent image ink containing rutile titanium oxide having a property of absorbing ultraviolet rays having a wavelength different from a specific wavelength (388nm or less) from the head 31 toward the base layer 93 of the tablet 9.
Thus, for example, information that can be confirmed only by a specific relationship other than the consumer of the tablet 9 can be printed so as to be visible only under specific ambient light.
<1-4. Experimental example >
Next, an experiment comparing the case where the surface of the tablet was printed by the printing method according to the present embodiment (example) and the case where the surface of the tablet was printed by the printing method using the ink different from the present embodiment (comparative example) will be described with reference to fig. 8.
(examples)
First, the contents of the experiment will be described. In this experiment, as a tablet to be printed, an FC sheet containing anatase-type titanium oxide on the surface was used. As the latent image ink, an ink containing rutile titanium oxide was used. The composition of the latent image ink a for printing the latent image layer used in this example is as follows.
Further, rutile type titanium oxide is used as a pigment of the ink. Sodium polyacrylate was used as the dispersant. Polyglyceryl fatty acid esters are used as surface tension modifiers. Propylene glycol is used as the humectant. Water was added as solvent.
The colorless and transparent latent image ink a having the above composition was ejected by an ink jet method onto the surface of the tablet, and a latent image layer representing a two-dimensional code was printed.
Comparative example
In order to compare with the above experiment, a printing method and a reading method using ink different from those of the present embodiment were performed. Specifically, an FC sheet containing anatase-type titanium oxide on the surface thereof was used as a sheet to be printed. An ink containing anatase titanium oxide was used as a latent image ink constituting a latent image layer. The detailed composition of the latent image ink B for printing the latent image layer used in this comparative example is as follows.
The operation of each composition was the same as in the examples.
The surfaces of the prints (tablets) obtained in examples and comparative examples were irradiated with invisible light having wavelengths of 300nm, 320nm, 340nm, 360nm, 380nm, and 400nm, and in each case, an image of the invisible light was taken, and a photograph as shown in fig. 8 was obtained. The upper row of fig. 8 is a photograph showing a plurality of invisible light images obtained by imaging the tablet as the printed matter of the example while changing the wavelength of the irradiated invisible light every 20 nm. The lower row of fig. 8 is a photograph showing a plurality of invisible light images obtained by imaging the tablet as the printed matter of the comparative example while changing the wavelength of the irradiated invisible light every 20 nm.
In the experimental results of the examples, as shown in the upper row of fig. 8, it was confirmed that the two-dimensional code of the latent image layer could be read when the wavelength of the invisible light was 360nm or more. From the results, it was found that when the invisible light in the wavelength range in which the anatase titanium oxide is hardly absorbed but the rutile titanium oxide is favorably absorbed is irradiated, the contrast between the latent image layer and the underlayer is clearly exhibited by the difference in the absorptance and the reflectance between the latent image layer and the underlayer, and information on the latent image layer can be read.
On the other hand, as shown in the lower row of fig. 8, it was confirmed that the two-dimensional code of the latent image layer could not be read in all the wavelength ranges of 300nm to 400nm, including the case where the wavelength of the invisible light was 360nm or more. When the latent image layer was irradiated with invisible light in a wavelength range (300nm to 340nm) that is easily absorbed by the anatase titanium oxide, it was found that most of the invisible light was absorbed by the anatase titanium oxide on the surface of the tablet in the latent image layer and also in the underlayer around the latent image layer, and a photograph of a relatively dark color was obtained. On the other hand, when the latent image layer was irradiated with invisible light having a wavelength range (360nm to 400nm) that is not easily absorbed by the anatase titanium oxide, it was found that most of the invisible light was reflected by the anatase titanium oxide on the surface of the tablet in the latent image layer and also in the underlayer around the latent image layer, and a relatively light color was obtained. In other words, it is considered that the pigment (substance) present on the surface of the latent image layer and the underlying layer exposed at the periphery thereof is the same, and therefore the contrast between the latent image layer and the underlying layer is not clearly shown.
< 2. second embodiment >
A second embodiment of the present invention will be described below with reference to fig. 9 to 11. In the following description, the same members and mechanisms as those described in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.
Fig. 9 is a diagram showing a configuration of a printing apparatus 110 according to a second embodiment of the present invention. The printing apparatus 110 of the present embodiment is an apparatus that transports a long strip-shaped base material 99 as a printing object (printing object) by the transport mechanism 10 and prints an image on the surface of the base material 99 by an ink jet method. As shown in fig. 9, the printing apparatus 110 of the present embodiment mainly includes: a conveyance mechanism 10, a base printing section (first printing section) 130, a color printing section 20, a latent image printing section (second printing section) 30, and a control section 50.
Specific examples of the long strip-shaped base material 99 include paper, film, and aluminum sheet, which are packaging materials for pharmaceuticals. The long strip-shaped base material 99 may be a packaging material for the above-described medicine, or may be paper or film that is not related to the medicine. Further, the base material as the printing object is not necessarily a series of base materials, and may be a plurality of base materials which are individually conveyed, for example.
The conveyance mechanism 10 is a mechanism that conveys the base material 99 in the conveyance direction so that the surface on the printing side is on the front surface. The conveyance mechanism 10 of the present embodiment includes: an unwinding roller 14, a plurality of conveying rollers 15, and a winding roller 16. The base material 99 is fed from the unwinding roller 14 and conveyed along a conveying path constituted by a plurality of conveying rollers 15. Each of the conveying rollers 15 guides the base material 99 to the downstream side of the conveying path by rotating about a horizontal axis. Further, the conveyed base material 99 is collected to the wind-up roll 16.
Some of the unwinding roller 14, the plurality of conveying rollers 15, and the winding roller 16 are actively rotated by a driving force of a motor. The remaining ones of the unwinding roller 14, the plurality of conveying rollers 15, and the winding roller 16 are driven to rotate as the substrate 99 is conveyed. Tension in the conveyance direction is applied to the base material 99 on the conveyance path due to the difference in rotation speed between the plurality of rollers. This suppresses loosening and wrinkling of the substrate 99 during conveyance.
The base printing section 130 is a section for printing a base layer on the surface of the base material 99 conveyed by the conveying mechanism 10. The color of the base layer is, for example, white. However, the color of the base layer is not limited to this, and can be changed as appropriate depending on the color or material of the base material. The base printing portion 130 is arranged upstream of the color printing portion 20 in the conveyance direction. In the present embodiment, the head 131 of the base printing portion 130 ejects ink for forming a base layer toward the surface of the base material 99. In the following description, the ink used to form the undercoat layer is sometimes referred to as "undercoat ink". The ink for a substrate contains anatase titanium oxide having a relatively large particle diameter. Thereby, the foundation layer 94 is formed on the surface of the base 99 (see fig. 10).
When the base material 99 is used for packaging medicines to be taken by a human, the composition of the ink discharged from the head 131 is preferably made of a material approved by food sanitation law or pharmaceutical affairs law. The head 131 has the same structure as the head 21 of the first embodiment. That is, the head 131 discharges ink for a base containing anatase titanium oxide from a plurality of nozzles 211 provided on the lower surface, thereby forming a base layer 94 on the surface of the base 99.
The printing device 110 of the present embodiment includes the color printing unit 20 having substantially the same configuration as that of the first embodiment. The color printing section 20 of the present embodiment includes four heads 21. The four heads 21 eject ink droplets of cyan, magenta, yellow, and black, for example. As a result, a multicolor image layer, which is a color image layer, is printed on the surface of the substrate 99.
The latent image printing section 30 is a portion for printing the latent image layer 92 on the surface of the base substrate 99 printed with the base layer 94, which is conveyed by the conveying mechanism 10, in a superimposed manner with respect to the base layer 94. The latent image printing section 30 is disposed downstream of the color printing section 20 in the conveying direction. The head 31 of the latent image printing unit 30 of the present embodiment discharges, for example, a colorless and transparent latent image ink toward the base layer 94. The latent image ink discharged from the latent image printing portion 30 contains rutile titanium oxide having a relatively small particle diameter. As a result, the latent image layer 92 is printed on the base layer 94 printed on the surface of the base 99 in an overlapping manner. However, the color of the latent image ink is not limited to colorless and transparent, and may be another color similar to the color of the base layer 94, for example.
As described above, when the reading apparatus 2 similar to the first embodiment is used for the long strip-shaped base material 99 having the surface printed thereon, the latent image layer 92 (see fig. 10) that is difficult to be visually recognized under normal ambient light can be made visible on the invisible image (see fig. 11). Fig. 10 shows a state of the surface of the base 99 on which the base layer 94 and the latent image layer 92 are printed under normal ambient light. Fig. 11 shows a state of the surface of the base material 99 under a specific ambient light. More specifically, by irradiating the surface of the substrate 99 with invisible light of a specific wavelength (360nm to 400nm) that is not absorbed by the anatase-type titanium oxide but is well absorbed by the rutile-type titanium oxide, the latent image layer 92 is clearly visible in a darker color than the background layer 94, depending on the difference in the absorption rate/reflectance between the anatase-type crystal structure and the rutile-type crystal structure (see fig. 11).
As described above, according to the printing method using the printing apparatus 110 of the present embodiment, the base layer 94 is printed on the surface of the base material 99 as the printing object, and the latent image layer 92 is further printed thereon in an overlapping manner. This makes it possible to print information expressed by the contrast between the base layer 94 and the latent image layer 92 so as to be visible only under specific ambient light.
< 3 > about the modification
While the main embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications other than those described above can be made without departing from the scope of the present invention.
In the first embodiment described above, the color image layer 91 is printed on the surface of the tablet 9 as the object to be printed, in addition to the latent image layer 92 that is difficult for the consumer to visually recognize under normal ambient light. However, the color image layer 91 may be omitted.
In the above-described embodiment, the undercoat layer 93 is mainly composed of anatase-type titanium oxide, and the latent image layer 92 is mainly composed of rutile-type titanium oxide, but the present invention is not necessarily limited thereto. For example, instead, the base layer may mainly contain rutile titanium oxide, and the latent image layer may mainly contain anatase titanium oxide. In this case, when the invisible light image is captured by irradiating the invisible light with a specific capture wavelength (360nm to 400nm), the latent image layer becomes clearly visible with a contrast with the background layer in a color lighter than that of the background layer. That is, the difference in absorption wavelength between anatase titanium oxide and rutile titanium oxide may be used to clearly show a difference in shade between the latent image layer and the underlayer, or may be reversed in shade (light and shade).
In the first embodiment described above, three heads 21 are provided in the color printing portion 20. However, the number of heads included in the color printing section 20 may be one to two, or four or more. In the above-described embodiment, one head 31 is provided in the latent image printing section (printing section, second printing section) 30. However, the number of heads 31 included in the latent image printing unit 30 may be two or more.
In the first embodiment described above, the underlayer 93 containing anatase titanium oxide on the surface is a surface layer of the FC sheet, but is not necessarily limited thereto. For example, instead of this, the base layer 93 containing anatase titanium oxide on the surface may be used as the surface layer of the sugar-coated tablet.
In the above-described embodiments, a wavelength range of 360nm to 400nm is described as a specific wavelength which is hardly absorbed by the anatase type titanium oxide but well absorbed by the rutile type titanium oxide. However, the wavelength range of the invisible light for irradiating the printed matter is not necessarily strictly limited thereto. In general, it is known that anatase-type titanium oxide has a band gap of 3.2eV (388nm) and rutile-type titanium oxide has a band gap of 3.0eV (413 nm). Therefore, theoretically, even if the wavelength range of 388nm to 413nm is adopted, the latent image layer can be read by the same reading method as described above.
In the above-described embodiment, the latent image layer is a two-dimensional image representing a two-dimensional code, but is not limited thereto. For example, the character string, the two-dimensional image containing some kind of information other than the two-dimensional code, and the braille may be used.
In the above-described embodiment, the color image layer, the latent image layer, and the base layer are printed by an inkjet method, but the present invention is not limited thereto, and printing may be performed by another method such as stamp printing or gravure printing.
The "granules" of the present invention may be coated tablets as described in the above embodiments, or may be bare tablets, orally disintegrating tablets (OD tablets), capsules, and the like. The "granule" of the present invention is not limited to tablets as a pharmaceutical, but may be tablets as a health food such as a health food, and a compressed candy such as a boiled water candy.
In addition, the respective elements appearing in the above-described embodiments or modified examples are appropriately combined within a range in which no contradiction occurs.
Description of reference numerals
1: printing apparatus (first embodiment)
2: reading device
9: tablet (printed matter )
10: conveying mechanism
30: latent image printing part (printing part, second printing part)
60: camera (shooting part)
61: light irradiation section (irradiation section)
70: information acquisition unit (information reading unit)
92: latent image layer
93: base layer
99: base material (printed matter, printed object)
119: printing apparatus (second embodiment)
130: base printing part (first printing part)
Claims (17)
1. A printed article, comprising:
an object to be printed;
a base layer formed on a surface of the object to be printed and containing a first substance having a property of absorbing invisible light of a specific wavelength; and
a latent image layer printed on the base layer and containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide.
2. The printed matter according to claim 1,
the first substance is anatase-type titanium oxide, and the second substance is rutile-type titanium oxide.
3. The printed matter according to claim 2,
the object to be printed is a granular object to be taken as a tablet by a consumer.
4. The printed matter according to any one of claims 1 to 3,
the latent image layer is printed in an ink jet manner.
5. A reading device for reading printed matter, wherein,
the printed matter is formed by printing a latent image layer containing a second substance on a base layer having a surface containing a first substance, wherein the first substance has a property of absorbing invisible light of a specific wavelength, and the second substance has a property of absorbing invisible light of a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide,
the reading apparatus includes:
an irradiation unit that irradiates, onto a surface of the printed matter, invisible light having a wavelength that is absorbed by one of the first substance and the second substance and is not absorbed by the other of the first substance and the second substance; and
the imaging unit images an invisible light image formed by receiving only invisible light of visible light and invisible light.
6. The reading apparatus of claim 5, further comprising:
and an image reading unit configured to read information included in the latent image layer from an imaging result of the imaging unit.
7. The reading apparatus of claim 6,
the irradiation section irradiates invisible light having a wavelength ranging from 360nm to 400nm to the surface of the printed matter.
8. A reading method for reading a printed matter, wherein,
the printed matter is formed by printing a latent image layer containing a second substance on a base layer having a surface containing a first substance, wherein the first substance has a property of absorbing invisible light of a specific wavelength, and the second substance has a property of absorbing invisible light of a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide,
the reading method comprises the following steps:
a) irradiating a surface of the printed matter with invisible light having a wavelength that is absorbed by one of the first substance and the second substance and is not absorbed by the other of the first substance and the second substance; and
b) and a step of capturing an invisible light image formed by receiving only invisible light of visible light and invisible light.
9. A printing method for printing a latent image layer on a substrate layer having a surface containing a first substance having a property of absorbing invisible light of a specific wavelength,
the printing method comprises the following steps:
c) a step of conveying the printing object having the base layer so that the base layer is on the surface; and
d) a step of forming the latent image layer on the base layer of the printing object by using an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide.
10. The printing method of claim 9,
the object to be printed is a granular object to be taken as a tablet by a consumer.
11. A printing method of printing a surface of a printing object, wherein the printing method comprises:
e) a step of conveying the printing object so that a surface to be printed is on a surface;
f) forming an underlayer with an ink containing a first substance having a property of absorbing invisible light of a specific wavelength on the surface of the printing object; and
g) a step of forming a latent image layer on the base layer of the printing object by using an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide.
12. The printing method of claim 11,
the printing object is a long strip-shaped or sheet-shaped substrate.
13. A printing apparatus for printing a latent image layer on a substrate having a surface containing a first substance that absorbs invisible light of a specific wavelength, comprising:
a conveying mechanism for conveying the printing object with the base layer in a mode that the base layer is positioned on the surface; and
a printing unit for forming the latent image layer on the base layer of the object to be printed by an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide.
14. The printing apparatus of claim 13,
the object to be printed is a granular object to be taken as a tablet by a consumer,
the substrate layer is provided on the surface of the pellet.
15. The printing apparatus of claim 14,
the printing section forms the latent image layer by an ink-jet method.
16. A printing apparatus for printing on a surface of an object to be printed, comprising:
a conveying mechanism for conveying the printing object in a manner that the surface of one side printed by the printing object is positioned on the surface;
a first printing unit that forms an underlayer with an ink containing a first substance having a property of absorbing invisible light of a specific wavelength on the surface of the object to be printed; and
a second printing unit for forming a latent image layer on the base layer of the object to be printed by using an ink containing a second substance having a property of absorbing invisible light having a wavelength different from the specific wavelength,
the first substance is one of anatase type titanium oxide and rutile type titanium oxide,
the second substance is the other of anatase type titanium oxide and rutile type titanium oxide.
17. The printing apparatus of claim 16,
the printing object is a long strip-shaped or leaf-shaped substrate.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-002337 | 2018-01-11 | ||
| JP2018002337A JP7026510B2 (en) | 2018-01-11 | 2018-01-11 | Printed matter, readers, reading methods, printing methods, and printing devices |
| PCT/JP2018/039587 WO2019138643A1 (en) | 2018-01-11 | 2018-10-25 | Printed material, reading apparatus, reading method, printing method, and printing apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111629907A CN111629907A (en) | 2020-09-04 |
| CN111629907B true CN111629907B (en) | 2022-04-08 |
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| CN201880086105.XA Active CN111629907B (en) | 2018-01-11 | 2018-10-25 | Printed matter, reading device, reading method, printing method, and printing device |
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| Country | Link |
|---|---|
| JP (1) | JP7026510B2 (en) |
| CN (1) | CN111629907B (en) |
| WO (1) | WO2019138643A1 (en) |
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| TWI691558B (en) * | 2018-05-08 | 2020-04-21 | 臺灣永光化學工業股份有限公司 | Ultra-high whiteness aqueous white color paste for digital textile printing ink and an ink composition using the same |
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| JP2007524646A (en) * | 2003-07-17 | 2007-08-30 | ドクター レディズ ラボラトリーズ， インコーポレイテッド | Pharmaceutical composition having a swellable coating |
| US7166154B2 (en) * | 2003-11-06 | 2007-01-23 | Hewlett-Packard Development Company, L.P. | System and a method for an edible, optically invisible ink |
| US20060222702A1 (en) * | 2005-03-31 | 2006-10-05 | Barreto Marcos A | System and method for optically tracking objects using a spectral fingerprint of fluorescent compounds |
| JP6670113B2 (en) * | 2015-01-20 | 2020-03-18 | 日本ケミファ株式会社 | Rosuvastatin calcium preparation and method of printing film-coated tablets by laser irradiation |
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- 2018-01-11 JP JP2018002337A patent/JP7026510B2/en active Active
- 2018-10-25 CN CN201880086105.XA patent/CN111629907B/en active Active
- 2018-10-25 WO PCT/JP2018/039587 patent/WO2019138643A1/en active Application Filing
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| CN1654548A (en) * | 2004-02-09 | 2005-08-17 | 默克专利股份有限公司 | Light interfere pigment |
| JP2006089741A (en) * | 2004-09-22 | 2006-04-06 | Hewlett-Packard Development Co Lp | System and a method for the creation of edible, optically invisible images |
| JP2007030448A (en) * | 2005-07-29 | 2007-02-08 | Toppan Printing Co Ltd | Machine readable information printed article |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2019119721A (en) | 2019-07-22 |
| CN111629907A (en) | 2020-09-04 |
| WO2019138643A1 (en) | 2019-07-18 |
| JP7026510B2 (en) | 2022-02-28 |
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