US20160077005A1 - Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method - Google Patents

Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method Download PDF

Info

Publication number
US20160077005A1
US20160077005A1 US14/851,304 US201514851304A US2016077005A1 US 20160077005 A1 US20160077005 A1 US 20160077005A1 US 201514851304 A US201514851304 A US 201514851304A US 2016077005 A1 US2016077005 A1 US 2016077005A1
Authority
US
United States
Prior art keywords
forgery prevention
prevention medium
specific invisible
specific
invisible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US14/851,304
Other languages
English (en)
Inventor
Nobuki Nemoto
Takahisa Nakano
Fumitoshi Morimoto
Shota Kure
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Assigned to KABUSHIKI KAISHA TOSHIBA reassignment KABUSHIKI KAISHA TOSHIBA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Kure, Shota, MORIMOTO, FUMITOSHI, NAKANO, TAKAHISA, Nemoto, Nobuki
Publication of US20160077005A1 publication Critical patent/US20160077005A1/en
Priority to US15/820,043 priority Critical patent/US11320374B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • 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
    • B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/744—Labels, badges, e.g. marker sleeves
    • 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/282—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using thermochromic compounds
    • 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
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/305—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers with reversible electron-donor electron-acceptor compositions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/06—Illumination; Optics
    • G01N2201/061—Sources
    • G01N2201/06113—Coherent sources; lasers

Definitions

  • Embodiments of the present invention relate to a forgery prevention medium, a forgery prevention medium manufacturing apparatus, and a forgery prevention medium manufacturing method.
  • a technique of attaching ink of a specific invisible material to a desired position by an inkjet or thermal transfer scheme is generally used when an invisible latent image is formed by a specific invisible material such as a fluorescent material not visibly recognized in an ordinary state and particularly the invisible latent image is formed on demand.
  • a material that absorbs an ultraviolet ray and emits a visible ray is used in many cases.
  • an invisible latent image forming method there is proposed a method of forming an invisible latent image by a laser.
  • a fluorescent material applied to (laminated on) one surface is set as a first layer
  • an information recording medium as a second layer is formed by laminating a photochromic material not allowing the transmission of a UV ray by laminating a UV ray thereon
  • a UV ray is irradiated to the second layer in accordance with a desired pattern so as to form a specific image by selectively changing the state of the second layer into a non-transmission state of a UV ray.
  • FIG. 1 is an outline configuration diagram of an image forming system
  • FIG. 2 is an outline cross-sectional view of a recording medium
  • FIGS. 3A and 3B are diagrams illustrating states before and after an invisible image is formed on a specific invisible material layer when a UV fluorescent material is used as a specific invisible material;
  • FIG. 4 is a flowchart illustrating a specific invisible image forming process of an embodiment
  • FIG. 5 is a flowchart illustrating an invisible latent image forming process of a first embodiment
  • FIG. 6 is a diagram illustrating a binary image and an inactivation target pixel of the first embodiment
  • FIG. 7 is a flowchart illustrating an invisible latent image forming process of a second embodiment.
  • FIG. 8 is a diagram illustrating a binary image and an inactivation target pixel of the second embodiment.
  • a forgery prevention medium of an embodiment includes a substrate and a specific invisible material layer directly or indirectly laminated on the substrate, having a specific invisible material reversibly and visually recognized through a predetermined process disposed thereon in a plane shape, and having a part of the specific invisible material inactivated in accordance with a visualized image pattern.
  • FIG. 1 is an outline configuration diagram of an image forming system.
  • An image forming system 10 includes an image processing apparatus 12 that performs an image process on an original image corresponding to an image formed on a recording medium 11 as a forgery prevention medium, a laser irradiation device 14 that performs an inactivation process in which a laser beam 13 is irradiated to a specific invisible image forming portion of the recording medium 11 based on the image process result of the image processing apparatus 12 so as to form an invisible image as an invisible latent image, and a stage 15 that holds the recording medium 11 at a predetermined position when the invisible image is formed.
  • the laser irradiation device 14 includes a laser controller 14 A that performs a laser emitting control based on the image process result of the image processing apparatus 12 and a laser oscillator 14 B that emits a laser beam under the control of the laser controller 14 A. Then, the laser irradiation device 14 performs an inactivation process of inactivating a specific invisible material by irradiating a laser beam to a pixel that maintains in a non-visible state, during a predetermined visualization process.
  • a fluorescent material a UV fluorescent material or an IR fluorescent material
  • a pixel which does not need to emit light even by the irradiation of the UV ray or the IR ray is inactivated.
  • a reversible temperature indicating material which reversibly changes from a colorless state (or a white state) to a color changed state or a colored state in accordance with an increase in temperature is used as the specific invisible material
  • a pixel which needs to be maintained in a colorless state (or a white state) is inactivated.
  • FIG. 2 is an outline cross-sectional view of the recording medium.
  • the recording medium 11 includes a normal recording medium 11 A which includes a paper or plastic substrate and records various information items thereon by a normal printing process or the like.
  • the recording medium 11 has a structure in which a specific invisible material layer 11 B formed by disposing a specific invisible material on the surface (the upper surface in FIG. 2 ) of the normal recording medium 11 A through coating, laminating, printing, or kneading is laminated on the normal recording medium 11 A.
  • the specific invisible material layer 11 B may be laminated on the normal recording medium 11 A through a layer such as an adhesion layer, a hologram layer, an image receiving layer for color printing, a ultraviolet reflection layer.
  • durability, such as scratch resistance can be raised by preparing a protective layer on the special invisible material layer 11 B.
  • FIGS. 3A and 3B are diagrams illustrating states before and after an invisible image is formed on a specific invisible material layer when a UV fluorescent material is used as a specific invisible material.
  • FIG. 3A is a diagram illustrating a state before the invisible image is formed on the specific invisible material layer.
  • a normal image 21 recorded on the normal recording medium 11 A by printing or the like can be visibly recognized in the non-irradiation state of the UV ray.
  • the entire specific invisible material layer 11 B emits fluorescent light along with the normal image 21 in the irradiation state of the UV ray.
  • the entire rectangular area emits fluorescent light.
  • FIG. 3B is a diagram illustrating a state after the invisible image is formed on the specific invisible material layer.
  • the normal image 21 recorded on the normal recording medium 11 A by printing or the like can be visibly recognized similarly to the case of FIG. 3A in the non-irradiation state of the UV ray.
  • the tamper resistance of the invisible latent image recorded by the specific invisible material is improved.
  • the first embodiment is an embodiment in which a fluorescent material (a UV fluorescent material or an IR fluorescent material) that emits fluorescent light by the irradiation of a UV ray or an IR ray is used as a specific invisible material.
  • a fluorescent material a UV fluorescent material or an IR fluorescent material
  • a desired image is binarized so as to generate a binary image data and a laser beam is irradiated to a pixel part to be inactivated in the specific invisible material layer 11 B laminated in advance on the normal recording medium 11 A based on the binary image data so as to inactivate the specific invisible material.
  • a desired image can be recorded as a specific image on the recording medium.
  • a YAG laser, a YVO 4 laser, a semiconductor laser, a CO 2 laser, or the like is desirable as a laser used to form an image pattern.
  • the harmonic waves of the YAG laser, the YVO 4 laser, and the semiconductor laser can be used in accordance with the absorbing wavelength of the recording medium 11 and the fluorescent material in addition to the basic waves of the YAG laser, the YVO 4 laser, the semiconductor laser, and the CO 2 laser.
  • inorganic fluorescent substance disclosed in, for example, JP 50-6410 A, JP 61-65226 A, JP 64-22987 A, JP 64-60671 A, JP 1-168911 A, JP 2003-89761 A, and JP 2006-255925 A can be appropriately selected as the fluorescent material (the fluorescent invisible latent image forming material) as the specific invisible material for forming the specific image.
  • organic fluorescent substance disclosed in JP 2005-15564 A, JP 2006-77191 A, JP 2006-348180 A, JP 2008-115225 A, and JP 2012-61794 A, and Magic Lumino Paint, Lumilite Color, and LOIHI MARKER can be appropriately selected as the organic fluorescent substance.
  • FIG. 4 is a flowchart of a specific invisible image forming process of the embodiment.
  • an operator inputs a desired image to the image processing apparatus 12 (step S 11 ).
  • the image processing apparatus 12 generates a grayscale image data (for example, a 256-grayscale monochromatic image) in which an input image is changed in grayscale (step S 12 ).
  • a grayscale image data for example, a 256-grayscale monochromatic image
  • the image processing apparatus 12 generates a binary image data in which the grayscale image data is binarized and outputs the binary image to the laser controller 14 A of the laser irradiation device 14 (step S 13 ).
  • the laser controller 14 A generates an invisible latent image by irradiating a laser beam oscillated from the laser oscillator 14 B to the specific invisible material layer 11 B laminated on the normal recording medium 11 A of the recording medium 11 in accordance with the black pixel part indicated by the binary image data corresponding to the binary image (step S 14 ). That is, the laser irradiation device 14 serves as an inactivation unit that inactivates an inactivation target pixel position of the specific invisible material layer by irradiating a laser beam thereto.
  • FIG. 5 is a flowchart of an invisible latent image forming process of the first embodiment.
  • FIG. 6 is a diagram illustrating a binary image and an inactivation target pixel of the first embodiment.
  • the binary image corresponding to the binary image data is set so that a grayscale of a black pixel 401 is set to 0 and a grayscale of a white pixel 402 is set to 1.
  • the laser controller 14 A acquires the position information of the black pixel 401 having a grayscale of 0 at the binary image illustrated in FIG. 6 (step S 22 ). That is, the image processing apparatus 12 and the laser controller 14 A serve as a pixel specification unit that specifies an inactivation target pixel position corresponding to a specific invisible image formed on a specific invisible material layer based on the input image data of the invisible target image. That is, the image processing apparatus 12 and the laser controller 14 A specify a position of a pixel (a black pixel) that needs to stop the emission of fluorescent light during the irradiation of light of a predetermined wavelength as an inactivation target pixel position.
  • the laser controller 14 A determines whether the irradiation of the laser beam to all black pixels 401 having a grayscale of 0 ends (step S 23 ).
  • the laser controller 14 A controls the laser oscillator 14 B so that the laser beam is irradiated to the black pixel 401 having a grayscale of 0 corresponding to the scanning position through laser scanning (step S 24 ). Accordingly, a specific invisible material 411 corresponding to the black pixel 401 is inactivated. On the contrary, a specific invisible material 412 corresponding to the white pixel 402 is activated as it is and an invisible latent image is formed so as to correspond to the binary image data as a whole. That is, the pixel having a grayscale of 0 of the binary image 40 is recorded as a pixel that does not emit light during the irradiation of the UV ray.
  • the laser controller 14 A moves the irradiation position (the scanning position) (step S 25 ), and the process is returned to step S 23 again.
  • step S 23 to step S 25 are repeated in the same way during a period in which the irradiation of the laser beam to all black pixels 401 having a grayscale of 0 does not end by the determination in step S 23 (step S 23 ; No).
  • step S 23 the inactivation process ends when the irradiation of the laser beam to all black pixels 401 having a grayscale of 0 ends by the determination of step S 23 (step S 23 ; Yes).
  • an image which is not visible under a general room lamp is observed as a light emitting pattern during the irradiation of the UV ray (electromagnetic wave).
  • the invisible image is formed on the specific invisible material layer 11 B including the fluorescent compound, the tamper resistance of the invisible latent image recorded by using the specific invisible material is improved.
  • the fluorescent material is used as the specific invisible material.
  • a second embodiment is an embodiment in which a temperature indicating material reversibly changing a colorless or white state and a colored state depending on the threshold temperature is used as the specific invisible material.
  • a colorless or white pixel (a grayscale of 1) is used as a pixel which is inactivated by the irradiation of the laser beam, the existence of the specific invisible image (the invisible latent image) is not easily detected and the formation position of the specific invisible image (the invisible latent image) is not easily specified compared with a pixel (a grayscale of 0) which is changed in color or colored with a change in temperature.
  • the temperature indicating material is a material which undergoes color change with temperature change by using solid-phase reaction, thermal decomposition, dehydration, electron transfer of an electron donor-acceptor, a change in crystalline structure, or the like. Among these, a temperature indicating material using solid-phase reaction or electron transfer of an electron donor-acceptor is preferred.
  • thermo indicating material using electron transfer of an electron donor-acceptor a temperature indicating material, which contains a reversal material satisfying the following conditions and a temperature indicating characteristic controller, is exemplified
  • reversal material a material, which causes reversible transformation between crystal and amorphous with respect to a part or all of an electron accepting compound and a composition system, or transformation between two phase separations or between phase separation and non-phase separation, is exemplified.
  • the material is solid at room temperature, and is a temperature indicating characteristic controller, at least a part of which is compatible with an electron accepting compound and/or a reversal material.
  • the speed of transformation between crystal and amorphous or transformation between phase separation and non-phase separation of the composition system is changed by transformation between crystal and amorphous or transformation between phase separation and non-phase separation of the temperature indicating characteristic controller, and the interaction between an electron donating compound and an electron accepting compound is not inhibited after the phase separation.
  • examples of the electron donating compound include crystal violet lactone, malachite green lactone, crystal violet carbinol, malachite green carbinol, N-(2,3-dichlorophenypleuco auramine, N-benzoyl auramine, rhodamine B lactam, N-acetyl auramine, N-phenyl auramine, 2-(phenyl imino ethane dilidene)-3,3-dimethyl indorine, N-3,3-trimethyl indorinobenzo spiropyran, 8′-methoxy-N-3,3-trimethyl indorinobenzo spiropyran, 3-diethylamino-6-methyl-7-chlorofluoran, 3-diethylamino-7-methoxyfluoran, 3-diethylamino-6-benzyloxyfluoran, 1,2-benz-6-diethylaminofluoran, 3,6-di-p-toluidino-4,5-d
  • examples of the electron accepting compound include acidic compounds such as phenols, metal salts of phenol, metal salts of carboxylic acid, sulfonic acid, salts of sulfonic acid, phosphoric acids, metal salts of phosphoric acid, acidic phosphoric acid ester, metal salts of acidic phosphoric acid ester, phosphorous acids, and metal salts of phosphorous acid. These can be used alone or in a mixture of two or more kinds thereof.
  • compounds having a steroid skeleton and the like are exemplified as a reversal material.
  • Specific examples thereof include cholesterol, stigmasterol, pregnenolone, methyl androstenediol, estradiol benzoate, epiandrostene, stenolone, ⁇ -sitosterol, pregnenolone acetate, ⁇ -cholestanol, and the like. These can be used alone or in a mixture of two or more kinds thereof.
  • thermo paper a compound which is an aromatic alcohol and has at least one phenolic hydroxyl group, aromatic alcohols, a compound having at least one benzoyl group, an aromatic ether compound, a sensitizer which is used in thermal paper, or the like is used.
  • Specific examples of the compound which is an aromatic alcohol and has at least one phenolic hydroxyl group include p-hydroxyphenethyl alcohol, 2-hydroxybenzyl alcohol, or vanillyl alcohol.
  • Specific examples of the aromatic alcohols include piperonyl alcohol, benzoin, benzhydrol, triphenylmethanol, methyl benzine acid, or benzyl DL-mandelat.
  • Specific examples of the compound having at least one benzoyl group include benzyl, benzoin isopropyl ether, benzyl phenyl ketone, or methyl 2-benzoylbenzoate.
  • aromatic ether compound examples include benzyl 2-naphthyl ether or 1-benzyloxy-2-methoxy-4-(1-propenyl)benzene.
  • sensitizer 4-benzyl biphenyl, m-terphenyl, or 4-benzoinbiphenyl is known to be effective.
  • these temperature indicating materials may be used alone or may be used in a form of microcapsules.
  • these temperature indicating materials may be dispersed in a resin binder for use, and as a resin to be dispersed, microencapsulation of the temperature indicating material or dispersion in a binder resin or the like is exemplified.
  • binder resin examples include polyethylenes, chlorinated polyethylenes, ethylene copolymers such as an ethylene-vinyl acetate copolymer and an ethylene-acrylic acid-maleic anhydride copolymer, polybutadienes, polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polypropylenes, polyisobutylenes, polyvinyl chlorides, polyvinylidene chlorides, polyvinyl acetates, polyvinyl alcohols, polyvinyl acetals, polyvinyl butyrals, fluorine resins, acrylic resins, methacrylic resins, acrylonitrile copolymers, polystyrene, halogenated polystyrene, stylene copolymers such as styrene-methacryate copolymers, acetal resins, polyamides such as nylon 66, polycarbonates, cellulose-based resin
  • METHAMOCOLOR manufactured by PILOT Corporation
  • THERMAL COLOR manufactured by Kiroku Sozai Sogo Kenkyusho Co., Ltd.
  • the like examples include METHAMOCOLOR (manufactured by PILOT Corporation), THERMAL COLOR (manufactured by Kiroku Sozai Sogo Kenkyusho Co., Ltd.), and the like.
  • the color change threshold temperature of the temperature indicating material is desirably in the range of ⁇ 30° C. to 70° C. and is more desirably in the range of ⁇ 20° C. to 5° C. or 40° C. to 60° C.
  • the threshold temperature is lower than ⁇ 30° C.
  • a problem arises in that a large-scale apparatus is needed to form an environment of the threshold temperature or less instead of a simple apparatus. Further, a problem arises in that the other materials forming the forgery prevention medium is degraded in an environment of the threshold temperature or less.
  • the threshold temperature is 70° C. or more
  • the other materials forming the forgery prevention medium may be degraded, deformed, or altered in an environment of the threshold temperature or more.
  • a temperature indicating material When the threshold temperature of the temperature indicating material is in a low temperature range ( ⁇ 20° C. to 5° C.), a temperature indicating material is used which is transparent or white at a temperature higher than the threshold temperature and becomes colored at a temperature lower than threshold temperature.
  • a temperature indicating material When the threshold temperature of the temperature indication material is in a high temperature range (40° C. to 60° C.), a temperature indicating material is used which is colored at a temperature higher than the threshold temperature and becomes transparent or white at a temperature lower than the threshold temperature.
  • the color change threshold temperature do not exist in the ordinary life temperature range in order to conceal the forgery prevention function, an easily realized temperature range excluding the temperature range of 5° C. to 40° C. is set. Further, a material can be used which has a plurality of color change threshold temperature values and is changed in color as three or more colors in accordance with a temperature.
  • the specific invisible image forming process illustrated in FIG. 4 is the same as the first embodiment. However, since the invisible latent image forming process of the second embodiment is different from that of the first embodiment, the invisible latent image forming process will be described below.
  • FIG. 7 is a flowchart of the invisible latent image forming process of the second embodiment.
  • FIG. 8 is a diagram illustrating a binary image and an inactivation target pixel of the second embodiment.
  • the binary image corresponding to the binary image data is set so that a grayscale of a black pixel 601 is set to 0 and a grayscale of a white pixel 602 is set to 1.
  • the laser controller 14 A acquires the position information of the white pixel 602 having a grayscale of 1 at a binary image 60 illustrated in FIG. 8 (step S 32 ).
  • the image processing apparatus 12 and the laser controller 14 A specify a position of a pixel (a white pixel) that needs to stop the changing in color or coloring in accordance with an increase in temperature as an inactivation target pixel position.
  • the laser controller 14 A determines whether the irradiation of the laser beam to all white pixels 602 having a grayscale of 1 ends (step S 33 ).
  • the laser controller 14 A controls the laser oscillator 14 B so that the laser beam is irradiated to the white pixel 602 having a grayscale of 1 corresponding to the scanning position through laser scanning (step S 34 ). Accordingly, the specific invisible material 612 corresponding to the white pixel 602 is inactivated.
  • an invisible latent image of the binary image 60 corresponding to the binary image data is formed as a whole while a specific invisible material 611 corresponding to the black pixel 601 is inactivated as it is. That is, even when the pixel having a grayscale of 1 in the binary image 60 increases in temperature, the pixel is recorded as a pixel which is not changed in color or colored.
  • the laser controller 14 A moves the irradiation position (the scanning position) (step S 35 ), and the process is returned to step S 33 again.
  • step S 33 to step S 35 are repeated in the same way during a period in which the irradiation of the laser beam to all white pixels 602 having a grayscale of 1 does not end by the determination of step S 33 (step S 33 ; No).
  • step S 33 the inactivation process ends when the irradiation of the laser to all white pixels 602 having a grayscale of 1 ends by the determination of step S 33 (step S 33 ; Yes).
  • an image which is not visible under a general room lamp becomes visible and is observed when the image is discolored or colored in accordance with an increase in temperature.
  • the invisible image is formed on the specific invisible material layer 11 B including the temperature indicating material even in the second embodiment, the tamper resistance of the invisible latent image recorded by using the specific invisible material is improved.
  • the pixel (the black pixel) not emitting fluorescent light is inactivated when the fluorescent compound is used as the specific invisible material, and the pixel (the colorless pixel or the white pixel) maintained in the state before the coloring is inactivated when the temperature indicating material is used as the specific invisible material.
  • the pixels can be inactivated in a reverse manner.
  • one kind of specific invisible material is used, but the UV fluorescent material, the IR fluorescent material, and the temperature indicating material can be appropriately selected and used in mixture thereof as the specific invisible material.
  • a plurality of kinds of specific invisible materials may be used in mixture or a plurality of kinds of specific invisible materials may be respectively formed in a plurality of areas of the surface of the normal recording medium 11 A.
  • the same image can be visibly recognized by the processes respectively corresponding to the specific invisible materials.
  • a change in the number of the lasers or the irradiation condition (the wavelength, the power, and the irradiation period) used for the inactivation is not limited to the above-described embodiments, and can be modified if necessary.
  • the image formed by the specific invisible material can have a grayscale. At that time, the image process in the image processing apparatus 12 can be modified in accordance with the number of the grayscales.
  • the laser having an appropriate wavelength can be selected.
  • a laser is most desirable in which two wavelengths are selected from a basic wave, a second harmonic wave, a third harmonic wave, and a fourth harmonic wave, one wavelength is used for the absorption band of the normal recording medium 11 A and the non-absorption band of the specific invisible material layer 11 B, and the other wavelength is used for the non-absorption band of the normal recording medium 11 A and the absorption band of the specific invisible material layer 11 B.
  • the reason that the fifth harmonic wave or more is not considered is that the energy abruptly decreases and thus the influence thereof is small.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • General Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Credit Cards Or The Like (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
US14/851,304 2014-09-12 2015-09-11 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method Abandoned US20160077005A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/820,043 US11320374B2 (en) 2014-09-12 2017-11-21 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-186725 2014-09-12
JP2014186725A JP6334340B2 (ja) 2014-09-12 2014-09-12 偽変造防止媒体、偽変造防止媒体作成装置及び偽変造防止媒体作成方法

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/820,043 Division US11320374B2 (en) 2014-09-12 2017-11-21 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method

Publications (1)

Publication Number Publication Date
US20160077005A1 true US20160077005A1 (en) 2016-03-17

Family

ID=54150247

Family Applications (2)

Application Number Title Priority Date Filing Date
US14/851,304 Abandoned US20160077005A1 (en) 2014-09-12 2015-09-11 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method
US15/820,043 Active 2037-03-06 US11320374B2 (en) 2014-09-12 2017-11-21 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/820,043 Active 2037-03-06 US11320374B2 (en) 2014-09-12 2017-11-21 Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method

Country Status (3)

Country Link
US (2) US20160077005A1 (fr)
EP (1) EP2995465B1 (fr)
JP (1) JP6334340B2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019133729A (ja) * 2018-02-02 2019-08-08 株式会社デンソーウェーブ 情報記録方法、情報読み出し方法およびアルミナ蛍光体

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3431304B1 (fr) * 2017-07-18 2020-05-20 Agfa-Gevaert Procédé permettant de fournir un ovd sur un document de sécurité par marquage au laser
JP6939613B2 (ja) * 2017-08-23 2021-09-22 株式会社デンソーウェーブ 情報記録方法および情報読み出し方法
DE102023135934A1 (de) * 2023-12-20 2025-06-26 Khs Gmbh Verfahren und Vorrichtung zum Auslesen mindestens eines Codeelements mindestens eines Kunststoff-Behälters

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873604A (en) * 1995-05-25 1999-02-23 Verify First Technologies, Inc. Document security system having thermo-activated pantograph and validation mark
US5990197A (en) * 1996-10-28 1999-11-23 Eastman Chemical Company Organic solvent based ink for invisible marking/identification
US20020056756A1 (en) * 1997-12-06 2002-05-16 Jon Cameron Thermochromic bar code
US6413305B1 (en) * 2000-02-07 2002-07-02 The Standard Register Company Thermochromic ink composition
US20030000450A1 (en) * 2001-06-27 2003-01-02 John Wesley Thermochromic ink safety label for chafing fuel cans and methods of making the same
US20030127415A1 (en) * 2002-01-07 2003-07-10 Fabricas Monterrey, S.A. De C.V. Color changing closure for bottling applications
US20050087605A1 (en) * 2003-10-24 2005-04-28 Pitney Bowes Incorporated Fluorescent hidden indicium
US7628336B2 (en) * 2007-05-25 2009-12-08 Target Brands, Inc. Transaction card with thermochromic feature

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506410A (fr) 1973-05-19 1975-01-23
JPS6165226A (ja) 1984-09-07 1986-04-03 Dainippon Toryo Co Ltd 白色スクリ−ン及び画像現出方法
JPS6374053A (ja) * 1986-09-18 1988-04-04 Mitsubishi Electric Corp 記録方法
JPS6422987A (en) 1987-07-20 1989-01-25 Sinloihi Co Ltd Light-emitting material
JP2567624B2 (ja) 1987-08-31 1996-12-25 パイロットインキ株式会社 水性蛍光インキ
JPH01168911A (ja) 1987-12-23 1989-07-04 Kuraray Co Ltd 紫外線発光繊維の製造方法
DE10048812B4 (de) * 2000-09-29 2005-07-28 Orga Systems Gmbh Datenträger mit mittels energiereichem Strahl personalisierbaren Echtheitsmerkmalen
JP2003089761A (ja) 2001-09-18 2003-03-28 Konica Corp インクジェットプリンター用蛍光体インク、蛍光体画像形成方法及びインクジェットプリンター
JP3811142B2 (ja) 2003-06-24 2006-08-16 株式会社東芝 希土類錯体を用いたｌｅｄ素子及び発光媒体
JP4185032B2 (ja) 2004-09-13 2008-11-19 株式会社東芝 蛍光画像形成物及び蛍光発光インク
JP2006255925A (ja) 2005-03-15 2006-09-28 Seiko Epson Corp 隠し絵の作成方法及び印刷物
JP4435033B2 (ja) 2005-06-16 2010-03-17 株式会社東芝 蛍光パターン形成物、記録媒体、セキュリティー媒体、及び記録方法
US20070212501A1 (en) * 2006-03-07 2007-09-13 Wynn Wolfe Thermal-activated beverage containers and holders
DE102006038270A1 (de) * 2006-08-10 2008-02-14 Bundesdruckerei Gmbh Sicherheits- und/oder Wertdokument mit einem Muster aus strahlungsmodifizierten Komponenten
JP2008115225A (ja) 2006-11-01 2008-05-22 Toshiba Corp 発光性インキ及びその用途
JP5498331B2 (ja) 2010-09-17 2014-05-21 株式会社東芝 情報記録媒体、その真偽判定方法、及び真偽判定システム

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873604A (en) * 1995-05-25 1999-02-23 Verify First Technologies, Inc. Document security system having thermo-activated pantograph and validation mark
US5990197A (en) * 1996-10-28 1999-11-23 Eastman Chemical Company Organic solvent based ink for invisible marking/identification
US20020056756A1 (en) * 1997-12-06 2002-05-16 Jon Cameron Thermochromic bar code
US6413305B1 (en) * 2000-02-07 2002-07-02 The Standard Register Company Thermochromic ink composition
US20030000450A1 (en) * 2001-06-27 2003-01-02 John Wesley Thermochromic ink safety label for chafing fuel cans and methods of making the same
US20030127415A1 (en) * 2002-01-07 2003-07-10 Fabricas Monterrey, S.A. De C.V. Color changing closure for bottling applications
US20050087605A1 (en) * 2003-10-24 2005-04-28 Pitney Bowes Incorporated Fluorescent hidden indicium
US7628336B2 (en) * 2007-05-25 2009-12-08 Target Brands, Inc. Transaction card with thermochromic feature

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019133729A (ja) * 2018-02-02 2019-08-08 株式会社デンソーウェーブ 情報記録方法、情報読み出し方法およびアルミナ蛍光体

Also Published As

Publication number Publication date
EP2995465B1 (fr) 2017-05-31
JP6334340B2 (ja) 2018-05-30
US20180073983A1 (en) 2018-03-15
US11320374B2 (en) 2022-05-03
EP2995465A1 (fr) 2016-03-16
JP2016060042A (ja) 2016-04-25

Similar Documents

Publication Publication Date Title
US11320374B2 (en) Forgery prevention medium, forgery prevention medium manufacturing apparatus, and forgery prevention medium manufacturing method
US6801233B2 (en) Thermal imaging system
US8597774B2 (en) Laser-marking film
US8098269B2 (en) Print head pulsing techniques for multicolor printers
JPH03500269A (ja) レーザ光誘導カラー印刷法
EP3587133B1 (fr) Support et dispositif d'enregistrement
US7463395B2 (en) Method for recording information into rewritable thermal label of the non-contact type
US11294306B2 (en) Recording medium and recording device
JP2001001645A (ja) 熱可逆性多色記録媒体
US9956787B2 (en) Laser recording device and recording method
JP2016172285A (ja) 保護囲い、レーザ照射システム
JP6045949B2 (ja) 偽変造防止媒体及び偽変造防止媒体の真偽判定方法
EP1055919A1 (fr) Procédé de contrôle d'initialisation d'un matériau d'indication thermique, élément de surveillance thermique et procédé de surveillance thermique
JP7155057B2 (ja) レーザ記録装置
JP2020196133A (ja) 液体吐出装置
JP2010125809A (ja) レーザーマーキング用積層体およびそれを用いたレーザーマーキング方法
JP6762822B2 (ja) レーザ記録装置、方法及びプログラム
EP1831873B1 (fr) Mode laser pulse pour l'ecriture d'etiquettes
JP7089923B2 (ja) 積層体
JP2020008658A (ja) サーモクロミック発光シート
KR20220010238A (ko) 외부 간섭으로부터 차단된 레이저 마킹층을 포함한 레이저 라벨
KR20220010237A (ko) 위조 방지가 가능한 레이저용 바코드 라벨
JP2023117088A (ja) 画像記録装置、画像記録装置の制御方法及び制御プログラム
JP2013127391A (ja) 示温ラベル

Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA TOSHIBA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NEMOTO, NOBUKI;NAKANO, TAKAHISA;MORIMOTO, FUMITOSHI;AND OTHERS;REEL/FRAME:037011/0366

Effective date: 20151029

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION