JP7131150B2 - LAMINATED BODY, PERSONAL AUTHENTICATION MEDIUM, AND AUTHENTICITY JUDGMENT METHOD OF PERSONAL AUTHENTICATION MEDIUM - Google Patents

Description

Embodiments of the present invention describe a laminate, a personal authentication medium, and a method of authenticating a personal authentication medium.

Among personal authentication media such as cards and passports, media containing security patches are known. In such personal identification media, the security patch is less likely to be degraded by chemicals or abrasion than in personal identification media in which the security patch is located on the surface of the media. In addition, the security patch is less likely to be altered and is less likely to be illegally removed from the personal authentication medium.

On the other hand, in order to protect personal authentication media from unauthorized duplication, laser printing is used in the manufacture of personal authentication media. In laser printing, the personal authentication medium has a color-developing layer that has the characteristic of absorbing a laser beam of a specific wavelength and thereby turning black. Information is recorded on the personal authentication medium by partially discoloring it to black. According to laser printing, it is possible to write different information on each individual authentication medium. Therefore, owner information such as the owner's face and signature shape, which is difficult to illegally duplicate or alter, is often recorded on the personal authentication medium by laser printing (see, for example, Patent Document 1).

WO2012/050223

By the way, there is always a demand for new technology as a measure to prevent unauthorized use of a fake personal authentication medium or a fake laminated body due to the forgery of the personal authentication medium. Such circumstances are also common to laminates provided with covert printing.

INDUSTRIAL APPLICABILITY Embodiments of the present invention can provide a laminate, a personal authentication medium, and a method for determining the authenticity of a personal authentication medium that make it possible to suppress unauthorized use of counterfeits.

A laminate for solving the above problems includes a first laminate material, a second laminate material, and a concealment print formed by invisible ink between the first laminate material and the second laminate material. . The concealment printing absorbs electromagnetic radiation outside the range of visible light through at least one of the first laminate material and the second laminate material so that the concealment print shows the sign, and the sign is concealed by visible light. be done.
A personal authentication medium for solving the above problems is a personal authentication medium including the laminate, and includes owner information for identifying an owner of the personal authentication medium.

According to each of the above configurations, since the concealment printing is hidden from the outside during observation when visible light is irradiated, even if the observer observes the laminate without knowing in advance that the laminate has the concealment printing, There is a high possibility that the existence of confidential printing will not be noticed. Therefore, even if the laminate is forged, it is highly likely that the counterfeit laminate includes the first laminate material and the second laminate material but does not include the covert printing. Therefore, it is possible to determine the authenticity of the laminate by confirming whether or not the laminate has concealment printing. In this way, since it is possible to identify a counterfeit laminate based on the presence or absence of confidential printing, unauthorized use of the counterfeit can be suppressed.

In the laminate, the second laminate material has a first surface in contact with the concealment printing and a second surface opposite to the first surface, and the laminate includes the second surface a color-developing laminate material that develops color by irradiation with a laser beam in contact with the color-developing laminate material; a security patch located on the surface of the color-developing laminate material opposite to the surface in contact with the second surface; and a protective laminate material that is transmissive to light.

According to the above configuration, the laminated body includes a security patch included between the color-forming laminate material and the protective laminate material, and a color-forming laminate material on which information that is difficult to forge compared to printing with ink or the like is recorded. Prepare. Therefore, counterfeiting of the laminate is more difficult.

In the laminate, the concealment printing may include a phosphor, and the light outside the visible light range may be light that excites the phosphor. According to the above configuration, since the concealment print is excited by absorbing light outside the range of visible light, when the laminate is observed in the visible region, the observer can recognize that the laminate has the concealment print. Hard to notice.

In the laminate, the first laminate material and the second laminate material are white laminate materials, the light outside the range of visible light is light in the infrared region, and the concealment printing is the red light. The detectable label that absorbs light in the outer region may be a label formed by light in the infrared region. According to the above configuration, since the security print absorbs light in the infrared region, the sign indicated by the security print can be verified by the illumination emitting infrared light and the image obtained by the infrared camera.

In the laminate, the confidential printing may include a code containing predetermined information. According to the above configuration, it is possible to determine the authenticity of the layered body not only by whether the layered body includes the confidential printing, but also by whether the confidential printing is a code containing specific information. Therefore, unauthorized use of counterfeits can be suppressed more reliably.

In the laminate, the confidential printing includes a first code containing predetermined information, and the color-developing laminate material includes predetermined information as a portion colored by irradiation with the laser beam, and the first code. In the first code and the second code, one code may include information to be authenticated, and the other code may include information for authenticating the information to be authenticated.

According to the above configuration, since the authenticity of the laminate is determined by whether the laminate includes both the first code and the second code, the laminate includes only one of the first code and the second code. Unauthorized use of counterfeits can be suppressed more reliably than in the case of determining authenticity based on whether or not they are included.

In the laminate, the laminate includes one code, the code is composed of a first partial code and a second partial code, and the color-developing laminate material is a portion colored by irradiation with the laser beam. Including the first partial code, the confidential printing may include the second partial code.

According to the above configuration, in order to forge the laminate, the first partial code and the second partial code are arranged so that the second partial code included in the confidential printing complements the first partial code included in the color-developing laminate material. and must be formed. Therefore, counterfeiting of the laminate is more difficult.

In the personal authentication medium, the confidential printing may include a positioning portion used for positioning the owner information on the personal authentication medium. According to the above configuration, it is possible to determine the authenticity of the personal authentication medium depending on whether the position of the owner information is displaced from the position of the positioning portion included in the confidential printing.

A personal authentication medium for solving the above-mentioned problems is a personal authentication medium comprising the laminate, wherein the color developing laminate material identifies the owner of the personal authentication medium as a portion colored by irradiation with the laser beam. and the secure print includes code containing information related to the owner information.

According to the above configuration, in addition to whether or not the personal authentication medium has confidential printing, the owner information of the color-developing laminate material and the information of the code included in the confidential printing are collated to verify the authenticity of the personal authentication medium. can be determined. Therefore, unauthorized use of counterfeits can be suppressed more reliably.

A method for determining the authenticity of a personal authentication medium for solving the above-mentioned problems includes confidential printing in which a machine-readable code including owner information is recorded, and the same owner information as the confidential printing, and verifying a personal authentication medium containing a coloring area in which a human-readable character string is recorded by the absorption wavelength or coloring wavelength of the confidential printing; and verifying the owner information recorded in the confidential printing. reading from a code by a reader; displaying the owner information read by the reader on a display as visible information; comparing the displayed visible information with the owner information of the coloring area; and determining the authenticity of the personal authentication medium.

According to the above configuration, it is possible to determine the authenticity of the personal authentication medium by collating the visible information based on confidential printing with the owner information of the coloring area. As a result, unauthorized use of personal authentication media can be suppressed.
In the method for determining authenticity of a personal authentication medium, the owner information recorded in the coloring area may be plain text.

In the method for determining authenticity of a personal authentication medium, the machine-readable code is composed of a first partial code and a second partial code, the first partial code is the coloring area, and the second partial code is It may be the confidential printing.

According to the above configuration, in order to forge the personal authentication medium, the first partial code and the second partial code are combined so that the second partial code included in the confidential printing complements the first partial code included in the color-developing laminate material. It is necessary to form the code and Therefore, it is more difficult to forge personal authentication media.

According to the embodiments of the present invention, unauthorized use of counterfeits can be deterred.

FIG. 3 is a plan view conceptually showing the structure of the laminate in the first embodiment viewed from the direction facing the second laminate material. FIG. 2 is a cross-sectional view conceptually showing the structure along line II-II in FIG. 1 ; FIG. 4 is a plan view conceptually showing concealment printing when viewed from a direction facing the plane on which the first laminate material spreads. FIG. 4 is a plan view conceptually showing a mark that is visually recognized when observing the laminate using an infrared camera. FIG. 10 is a plan view conceptually showing the structure of the laminate in the second embodiment viewed from the direction facing the transparent protective laminate material. FIG. 6 is a cross-sectional view conceptually showing a cross section along line VI-VI of FIG. 5 ; FIG. 4 is a plan view conceptually showing concealment printing when viewed from a direction facing the plane on which the first laminate material spreads. FIG. 4 is a plan view conceptually showing a mark that is visually recognized when observing the laminate using an infrared camera. FIG. 10 is a plan view conceptually showing the structure of the individual authentication medium formed by irradiating the laminate in the second embodiment with a laser beam, viewed from the direction facing the transparent protective laminate material. FIG. 10 is a cross-sectional view conceptually showing the structure along line XX of FIG. 9; FIG. 4 is a plan view conceptually showing a mark visually recognized when the personal authentication medium is observed using an infrared camera; FIG. 11 is a plan view conceptually showing the structure after the personal authentication medium in the second form has been tampered with; Sectional drawing which shows the structure which follows the XIII-XIII line of FIG. FIG. 11 is a plan view showing an example of a mark visually recognized when observing a personal authentication medium that has been tampered with using an infrared camera; The top view which shows an example of a concealment printing when the laminated body in a 3rd form is seen from the direction which opposes a 2nd laminated material. FIG. 4 is a plan view conceptually showing a mark that is visually recognized when observing the laminate using an infrared camera. FIG. 11 is a plan view conceptually showing the structure of the personal authentication medium in the fourth embodiment viewed from the direction facing the transparent protective laminate material; FIG. 18 is a cross-sectional view conceptually showing the structure along line XVIII-XVIII in FIG. 17; FIG. 4 is a plan view conceptually showing a mark visually recognized when the personal authentication medium is observed using an infrared camera; FIG. 12 is a plan view conceptually showing the structure of the personal authentication medium in the fifth embodiment viewed from the direction facing the transparent protective laminate material; FIG. 4 is a plan view conceptually showing a mark visually recognized when the personal authentication medium is observed using an infrared camera;

Embodiments of a laminate, a personal authentication medium, and a method of authenticating a personal authentication medium according to the present invention will be described with reference to FIGS. 1 to 21. FIG. Structures, materials, functions, effects, and examples of the laminate or personal authentication medium of the present invention are described below. This embodiment includes five forms. Forms of these laminates or personal authentication media can be combined. Depending on the combination, they can have their respective functions and effects, and can have their synergistic functions and effects.

The laminate includes a first laminate material, a second laminate material, and covert printing. The covert print is positioned between the first laminate material and the second laminate material and laminated with each laminate material. The covert printing exhibits a sign by absorbing electromagnetic radiation outside the visible range transmitted through at least one of the first laminate material and the second laminate material. In addition, concealment printing conceals without forming a mark in observation when light other than light outside the visible region is irradiated. Hereinafter, with reference to FIGS. 1 to 21, the laminate and the personal authentication medium including the laminate will be described in more detail.

The personal identification medium may be a personal identification card. This personal identification card may be an ID card, a national ID card, a passport card, a driver's license, or the like. Alternatively, the personalization medium may be a page of a booklet. The booklet may be a passport booklet or the like. The personal authentication medium may be a personalized laminate. The laminate may be cards or pages.

[First embodiment of the present invention]
The configuration of the laminate according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.
As FIG. 1 shows, the stack 1 may be a card. In a plan view facing the second laminate material 12 provided in the laminate 1 , the printed portion 8 is visible to the naked eye of an observer under illumination of visible light, although the concealed printing is not visible. Note that viewing the laminate 1 with the naked eye means viewing the laminate 1 without using an optical system or a filter.

As shown in FIG. 2, the laminate 1 comprises a first laminate material 11, a second laminate material 12, and a covert print 2. As shown in FIG. The concealment printing 2 is provided between the first laminate material 11 and the second laminate material 12 in the thickness direction of the laminate 1 . The printing part 8 described above is located on the surface of the second laminate material 12 opposite to the surface in contact with the first laminate material 11 . In addition, as shown in FIG. 1, the printing unit 8 includes, for example, a plurality of alphabets. The printing unit 8 may include characters other than alphabets, numbers, and patterns.

As shown in FIG. 3, the confidential print 2 has a shape. In the example shown in FIG. 3, confidential printing 2 includes multiple words "GENUINE". In a plan view facing the first laminate material 11, the letters forming the word are separated from each other. Note that FIG. 3 shows a state in which the confidential printing 2 is visualized.

With the naked eye, the printed portion 8 formed on the second laminate material 12 can be visually recognized, but the concealment print 2 cannot be visually recognized. On the other hand, it is possible to obtain the mark of the confidential print 2 by means of an optical system or a filter. This optical system may be a camera. The camera is an infrared camera or the like.

As shown in FIG. 4, it is possible to obtain the markings of both the infrared ink covert printing 2 and the printing unit 8 by means of an infrared camera. In addition, under infrared illumination, it is also possible to obtain a sign of the secret printing 2 of infrared ink with an infrared camera. This concealment print 2 absorbs infrared rays and transmits visible light. Moreover, the printing part 8 absorbs infrared rays and visible light. As a result, the markings of both the confidential printing 2 and the printing unit 8 are obtained by the infrared camera. The first laminate material 11 and the second laminate material 12 may be transparent or opaque. Here, the first laminate material 11, the second laminate material 12, or both may transmit part or all of the infrared rays. Alternatively, the amount of infrared rays transmitted through the first laminate material 11 and the second laminate material 12 is different from the amount of infrared rays transmitted through the security printing 2 and the printing section 8, respectively.

Alternatively, the infrared transmittance of the first laminate material 11 and the security print 2 is different, and the infrared transmittance of the first laminate material 11 and the printed portion 8 is also different. Alternatively, the second laminate material 12 and the security print 2 have different infrared transmittances, and the second laminate material 12 and the printed portion 8 also have different infrared transmittances.

According to the first embodiment of the present invention, since the concealment print 2 is hidden from the outside during observation in which the light in the visible region is irradiated, if the laminate 1 has the concealment print 2 is not known in advance, the laminate Even if the observer observes 1, there is a high possibility that the observer will not notice the existence of the confidential print 2. Therefore, even if the laminate 1 is forged, there is a high possibility that the counterfeit laminate has the first laminate material 11 and the second laminate material 12 but does not have the confidential print 2 . Therefore, it is possible to determine the authenticity of the laminate 1 by confirming whether the laminate 1 has the confidential printing 2 or not. In this way, since it is possible to identify the counterfeit laminated body 1 based on the presence or absence of the confidential printing 2, it is possible to suppress unauthorized use of the counterfeit.

[Second form of the present invention]
A laminate and a personal authentication medium according to the second embodiment of the present invention will be described with reference to FIGS. 5 to 14. FIG.

As FIG. 5 shows, the stack 1 may be a card. In a plan view facing the transparent protective laminate material 7 included in the laminate 1, the security patch 6 and the printed portion 8 are visible at the same time with the naked eye. Note that, as in the first embodiment of the present invention, the naked eye means observing the laminate 1 under illumination light in the visible region without using an apparatus for observing the laminate 1 .

As shown in FIG. 6, the laminate 1 includes a first laminate material 3, a second laminate material 4, and a secret print 2, as in the first embodiment of the present invention. The first laminate material 3 and the second laminate material 4 are white laminate materials. A covert print 2 is positioned between the first laminate material 3 and the second laminate material 4 . Compared to when at least one of the first laminate material 3 and the second laminate material 4 is transparent, the concealment print 2 is less visible from the outside when observed in the visible region.

The laminate 1 further includes a color-developing laminate material 5 that develops color when irradiated with a laser beam, a printed portion 8 , and a security patch 6 . In the second laminate material 4 , the color-developing laminate material 5 is in contact with the surface in contact with the first laminate material 3 , in other words, the surface opposite to the surface in contact with the confidential print 2 . The printed portion 8 and the security patch 6 are located on the surface of the color-developing laminate material 5 opposite to the surface in contact with the second laminate material 4 . The laminate 1 further comprises a security patch 6 and a transparent protective laminate material 7 covering the print 8 . The transparent protective laminate material 7 is an example of a protective laminate material.

In other words, the second laminate material 4 has a first surface in contact with the confidential print 2 and a second surface opposite to the first surface. The laminate 1 includes a color-developing laminate material 5, a security patch 6, and a transparent protective laminate material 7. - 特許庁The color-developing laminate material 5 develops color by being in contact with the second surface and irradiated with a laser beam. The security patch 6 is located on the side of the color-developing laminate material 5 opposite to the side in contact with the second side. A transparent protective laminate material 7 covers the security patch 6 and transmits light in the visible range.

A laminate 1 includes a security patch 6 enclosed between a color-forming laminate material 5 and a transparent protective laminate material 7, and a color-forming laminate material 5 on which information that is difficult to forge compared to printing with ink or the like is recorded. Prepare. Therefore, counterfeiting of the laminate 1 is more difficult.

The security patch 6 comprises a relief layer 6a, a deposition layer 6c and an adhesive layer 6d. The relief layer 6a includes a relief surface 6b including an uneven surface. A deposited layer 6c covers the relief surface 6b. The adhesive layer 6d covers the entire relief surface 6b. The security patch 6 is adhered to the chromogenic laminate material 5 with an adhesive layer 6d.

As shown in FIG. 7, the confidential printing 2 includes multiple words "GENUINE" as in the first embodiment of the present invention. In plan view facing the first laminate 3, the words are spaced apart from each other. The confidential printing 2 further includes a frame printing 2a. The frame print 2a has a frame shape surrounding the area to be surrounded in a plan view facing the plane on which the first laminate material 3 spreads. For convenience of explanation, FIG. 7 shows a state in which the confidential printing 2 is visualized.

FIG. 8 shows a mark of the laminate 1 obtained by an infrared camera or the like while the laminate 1 is irradiated with light. In this case, illumination for observation is applied to the transparent protective laminate material 7 from the opposite side of the color-developing laminate material 5 or from the opposite side of the first laminate material 3 from the second laminate material 4 . 1 is irradiated. Further, an infrared camera or the like is arranged on the opposite side of the transparent protective laminate material 7 from the coloring laminate material 5 .
As shown in FIG. 8, when the laminated body 1 is observed, a mark in which the concealment printing 2 and the printing portion 8 are overlapped is observed.

Here, it is desirable that the deposited layer 6c included in the security patch 6 does not interfere with the printing section 8 or the confidential printing 2 when the laminate 1 is observed with an infrared camera or the like. In other words, the deposited layer 6c preferably has a shape and a characteristic that does not hide the printed portion 8 and the confidential print 2 from an infrared camera or the like. More specifically, the deposition layer 6c should be transparent to the wavelength range used for observing the laminate 1, or should have a pattern shape that does not easily interfere, in other words, does not hide the printed portion 8 or the concealment print 2. is desirable.

FIG. 8 referred to above shows the case where the security patch 6 is visually recognized with the naked eye, but the security patch 6 is not marked by an infrared camera or the like. Therefore, in FIG. 8, the printing unit 8 and the confidential printing 2 are not hidden by the security patch 6, and can be confirmed by the observer.

FIG. 9 shows a planar structure of a personal authentication medium 10 in which the layered body 1 of the second embodiment of the present invention is personalized. The personal authentication medium 10 is obtained by irradiating the laminate 1 described above with reference to FIGS. The area including the surface in contact with the transparent protective laminate material 7 is colored.

As shown in FIG. 9, the personal authentication medium 10 includes a coloring area 5a in the coloring laminate material 5. As shown in FIG. The coloring area 5 a contains owner information for identifying the owner of the personal authentication medium 10 . A personal authentication medium 10 in the second embodiment of the present invention includes an owner's identification photograph as owner information. The owner information may be information other than the owner's ID photo. The owner information may be the owner's ID photo, name, date of birth, nationality, age, gender, or a combination thereof.

In a plan view facing the transparent protective laminate material 7, part of the color development area 5a and part of the security patch 6 overlap. The coloring area 5 a may be formed at a position not overlapping the security patch 6 in plan view facing the transparent protective laminate material 7 , or the entire coloring area 5 a may overlap the security patch 6 .

As shown in FIG. 10, a coloring region 5a is formed in a part of the coloring laminate material 5 by irradiation with a laser beam. The color-developing region 5a includes a surface of the color-developing laminate material 5 in contact with the transparent protective laminate material 7, and is located in a part of the color-developing laminate material 5 in the thickness direction. In addition, the coloring region 5a may be located in the entirety of the coloring laminate material 5 in the thickness direction. Alternatively, the coloring region 5a may be positioned only inside each of the pair of surfaces facing each other in the thickness direction of the coloring laminate material 5. As shown in FIG. A part of the coloring area 5 a overlaps a part of the security patch 6 when viewed from the thickness direction of the personal authentication medium 10 .

Here, as described above with reference to FIGS. 7 and 8, the confidential printing 2 includes the frame printing 2a. The frame print 2a is an example of a positioning portion, and the frame print 2a is used as a positioning portion for determining the position of the color development area 5a with respect to the color development laminate material 5 when forming the color development area 5a on the color development laminate material 5. be done. In other words, a frame-shaped frame print 2a is provided in the area of the color-developing laminate material 5 that indicates the color-developing area 5a. Thus, the confidential printing 2 includes a positioning portion used for positioning the owner information on the personal authentication medium 10. FIG. Thus, the authenticity of the personal authentication medium 10 can be determined by whether or not the position of the owner information is displaced from the position of the frame print 2a included in the confidential print 2. FIG.

It should be noted that the frame print 2a does not have to be frame-shaped, and may have any shape as long as it can be determined whether or not the color-developing region 5a is provided at the correct position in the color-developing laminate material 5. FIG. The frame print 2a may be a register mark, or may be a straight line, a cross line, or a multiple circle indicating the print position, in other words, the central portion of the laser beam irradiation area. Furthermore, the frame print 2a may indicate the area irradiated with the laser beam by a combination of straight lines, curved lines, halftone dots, and the like. In this way, the frame print 2a may have any shape as long as it can be used as a marker indicating the position or area to be irradiated with the laser beam.

When the color-developing laminate material 5 is irradiated with a laser beam to form the color-developing area 5a, an area of the color-developing laminate material 5 that is aligned with the frame print 2a provided in the confidential print 2 is formed. , a coloring region 5a can be formed. As a result, light for observation is applied to the transparent protective laminate material 7 from the opposite side of the color-developing laminate material 5 or from the opposite side of the first laminate material 3 to the second laminate material 4, thereby The frame print 2a can be detected by an infrared camera from the side of the protective laminate material 7 opposite to the color-developing laminate material 5 . Then, by irradiating the color-developing laminate material 5 with a laser beam while performing alignment by the frame printing 2a, the color-developing region 5a can be formed.

FIG. 11 shows markings on the personal authentication medium 10 obtained by an infrared camera or the like. At this time, the personal authentication medium 10 is observed from the opposite side of the transparent protective laminate material 7 from the chromogenic laminate material 5 or from the opposite side of the first laminate material 3 from the second laminate material 4 . It emits light for In addition, a mark of the personal identification medium 10 can be obtained by an infrared camera or the like from the opposite side of the transparent protective laminate material 7 to the coloring laminate material 5 .

As shown in FIG. 11, the observer can observe the sign in which both the concealment printing 2 and the coloring area 5a are integrated. More specifically, the coloring area 5a is positioned within the enclosed area surrounded by the frame printing 2a included in the confidential printing 2. As shown in FIG. As a result, the coloring area 5a and the frame print 2a can form one sign composed of the silhouette of the owner and the outer frame surrounding the silhouette.

An example has been described above in which the concealment print 2 and the coloring area 5a are aligned through the frame print 2a, thereby forming an integrated sign. Not limited to this, by providing the printing unit 8 while detecting the confidential printing 2, it is also possible to associate the confidential printing 2 and the printing unit 8 through the frame printing 2a.

9, the personal authentication medium 10 does not have any other layer on the side of the first laminate material 3 opposite to the side in contact with the confidential printing 2. As shown in FIG. However, the personal identification medium 10 may have other layers. Other layers may be a color-forming laminate, a transparent protective laminate, and a printing layer. Furthermore, the personal authentication medium may have an intermediate layer, an adhesive layer, or the like between the layers other than between the first laminate material 3 and the second laminate material 4 .

An example in which the personal authentication medium 10 is tampered with will be described below with reference to FIGS. 12 to 14. FIG.
The personal authentication medium 10 may be falsified, for example, by the following methods. The personal authentication medium 10 is changed by imitating the security patch 6 or by taking out the security patch 6 from the personal authentication medium 10, sticking it on the color-developing laminate material 5, and rewriting the ID photograph of the color-developing laminate material 5. can be tampered with. However, even if a person who has not been notified of the existence of the confidential print 2 in advance observes the personal authentication medium 10 , there is a high possibility that the person will not notice the confidential print 2 included in the personal authentication medium 10 . That is, there is a high possibility that the person who falsifies the personal authentication medium 10 will not notice the confidential printing 2 included in the personal authentication medium 10 . Therefore, when a falsifier draws an ID photo on a new color-developing laminate material 5, the frame print 2a and the ID photo, that is, the color-developing area 5a are not aligned because the position of the confidential print 2 is not confirmed.

As shown in FIG. 12, a tampered sign 9 is formed by irradiating the color-forming laminate material 5 with a laser beam. The tampered personal authentication medium 10A contains the tampered mark 9. FIG.
As shown in FIG. 13, the color-developing laminate material 5 is formed with a color-developing region 5a. A colored region 5 a formed on the colored laminate material 5 constitutes a tampered sign 9 .

Similar to FIG. 11, FIG. 14 shows an image of the tampered personal authentication medium 10A obtained by an infrared camera or the like. At this time, the tampered personal authentication medium 10A is attached to the transparent protective laminate material 7 on the opposite side of the chromogenic laminate material 5, or on the first laminate material 3 on the opposite side of the second laminate material 4. Illuminated from the side. Also, an image of the personal identification medium 10A that has been falsified by an infrared camera or the like can be obtained from the opposite side of the transparent protective laminate material 7 from the color-developing laminate material 5 .

As FIG. 14 shows, the tampered mark 9 with respect to the frame print 2a is not in the correct position. More specifically, the tampered sign 9 protrudes from the area defined by the frame print 2a. As a result, it can be seen that the tampered sign 9 was drawn on the color-developing laminate material 5 without being aligned by the frame printing 2a. In other words, it can be discovered that the falsified personal authentication medium 10A is an object formed by falsifying the authentic personal authentication medium 10. FIG.

Also, the invisible ink that forms the concealment print 2 may be ink that is transparent in the visible region, in other words, ink that is transparent in the visible region. Also, the invisible ink may be an ink that transmits light of all wavelengths included in the visible region. As a result, the confidential print 2 is not visible when the personal authentication medium 10 is observed through the naked eye.

In other words, since the security print 2 transmits visible light, the security print 2 is difficult to be visually recognized even when the laminate 1 or the personal authentication medium 10 is observed through transmission. In addition, since the security print 2 absorbs light in the infrared region, the sign of the security print 2 indicated by the image obtained by the infrared illumination and the infrared camera can be obtained.

[Third embodiment of the present invention]
A laminate according to the third embodiment of the present invention will be described with reference to FIGS. 15 and 16. FIG. The third mode of the present invention differs from the first mode of the present invention in the type of sign indicated by confidential printing. Therefore, the differences between the first embodiment and the third embodiment will be described in detail below. On the other hand, in the third embodiment of the present invention, points in common with the first embodiment of the present invention are denoted by reference numerals of the first embodiment, and detailed description thereof will be omitted.

In the laminate of the third embodiment of the present invention, encoded information is recorded in the confidential printing. Details of the laminate will be described below with reference to FIGS. 15 and 16. FIG.
FIG. 15 shows the planar structure of the laminate. Note that FIG. 15 shows a state in which the concealment print formed on the first laminate material 11 is visualized. Also, in FIG. 15, the illustration of the second laminate material 12 is omitted for convenience of explanation.

As shown in FIG. 15, laminate 20 includes first laminate material 11 . A machine-readable code is formed as a secret print 21 on a part of the first laminate material 11 . In this embodiment, the confidential print 21 is a two-dimensional code. The confidential print 21 may be a matrix-type two-dimensional code, which is one of two-dimensional codes. In the example of this embodiment, the confidential printing 21 is a QR code (registered trademark), which is one of matrix type two-dimensional codes. The matrix-type two-dimensional code may be Datamatrix, VeriCode, or the like. Note that the two-dimensional code may be a stacked two-dimensional code. Stacked two-dimensional codes may be PDF417, CODE49, and the like. Note that the code is not limited to a two-dimensional code, and may be a one-dimensional code. A one-dimensional code is a bar code or the like.

In addition to whether or not the layered body 20 includes the confidential print 21, it is possible to determine the authenticity of the layered body 20 by whether or not the layered body 20 is a code containing specific information. Therefore, it is possible to improve the certainty of preventing unauthorized use of counterfeits.

The security print 21 can transmit light in the visible region and absorb light in the infrared region. Therefore, the concealment print 21 is transparent in the visible region. Therefore, the observer does not notice that there is the concealment print 21 on the first laminate material 11 .

FIG. 16 shows the planar structure of the laminate 20. As shown in FIG. In FIG. 16, the infrared rays are directed to the laminate 20 from the opposite side of the first laminate material 11 to the second laminate material 12 or from the opposite side of the second laminate material 12 to the first laminate material 11 . is irradiated. Also, the laminate 20 shown in FIG. 16 is the laminate 20 photographed by the infrared camera from the side opposite to the first laminate material 11 with respect to the second laminate material 12 .

As shown in FIG. 16, the infrared camera provides an indication of both the printing unit 8 and the confidential printing 21 . In this embodiment, since the printing part 8 absorbs light in the visible range and absorbs light in the infrared range, the marking of the printing part 8 can be obtained by the infrared camera. The printing unit 8 may absorb light in the visible region and transmit light in the infrared region. As a result, the marking of the printed part 8 is obtained in the visible light, but the marking of the printed part 8 is not obtained in the infrared region.

[Fourth form of the present invention]
The configuration of the personal authentication medium according to the fourth embodiment of the present invention will be described with reference to FIGS. 17 to 19. FIG. The fourth form of the present invention differs from the third form of the present invention in that it includes owner information for personal authentication and is provided with security patches. Also, the fourth embodiment of the present invention differs from the personal authentication medium 10 of the second embodiment of the present invention in that confidential printing includes coded information. Therefore, the differences will be described in detail below. On the other hand, common points with the second embodiment of the present invention or the third embodiment of the present invention will be omitted from detailed description by attaching the reference numerals of each embodiment.

As shown in FIG. 17, the personal authentication medium 30 includes a printing section 8, a coloring area 5a, and a security patch 6. FIG. By observing the personal authentication medium 30 through the transparent protective laminate material 7, the printed portion 8, the colored area 5a, and the security patch 6 are visible. In this embodiment, the printing unit 8 includes the name of the personal authentication medium 30 and a word indicating the type of owner information. As in the second embodiment of the present invention, the coloring area 5a contains the identification photograph of the owner of the personal authentication medium 30 as owner information. Note that the coloring area 5a may include plain text as the owner information.

A part of the coloring area 5 a overlaps a part of the security patch 6 when viewed from the thickness direction of the personal authentication medium 30 . Note that the security patch 6 may have printed information obtained by encrypting the owner information included in the printing unit 8 . The printing of the security patch 6 may be laser printing.

FIG. 18 shows a cross-sectional structure of the personal authentication medium 30 along line XVIII-XVIII in FIG.
As shown in FIG. 18, the personal authentication medium 30 includes the first laminate material 3, the second laminate material 4, the color-developing laminate material 5, and the transparent protective layer, similar to the personal authentication medium 10 in the second embodiment of the present invention. A laminate material 7 is included. Between the first laminate material 3 and the second laminate material 4 there is a covert print 21 . Between the second laminate material 4 and the color-developing laminate material 5 there is a printed portion 8 . A coloring area 5 a is formed in a part of the coloring laminate material 5 . The coloring region 5a can be formed by irradiation with a laser beam.

Owner information is recorded on the color-developing laminate material 5 as a color-developing area 5a. The owner information recorded as the coloring area 5a is the owner information of the personal authentication medium 30 and the like. As described above, the coloring area 5a includes the owner's identification photograph, which is an example of the owner information. The confidential print 21 is a code containing information related to owner information. The confidential print 21 may be a code in which all or part of the owner information is recorded. In this embodiment, the confidential print 21 is a two-dimensional code as in the third embodiment of the invention. The confidential print 21 includes, for example, information indicating the age of the owner, the gender of the owner, the name of the owner, etc. as information related to the owner information.

The confidential print 21 can be read by a reader. The personal authentication medium 30 can be authenticated from the absorption wavelength or coloring wavelength of the confidential print 21 . Authenticity determination of the personal authentication medium 30 can be performed by the following procedure. It should be noted that the personal authentication medium on which authenticity determination is performed, which will be described below, includes the confidential printing 21 and the coloring area 5a. The confidential printout 21 contains owner information, and a machine-readable code is recorded in the confidential printout 21 . The coloring area 5a includes the same owner information as the confidential print 21 and records a human readable character string.

In authenticity determination, first, the reader authenticates the personal authentication medium 30 from the absorption wavelength or coloring wavelength of the confidential print 21, and the reader reads the owner information recorded in the confidential print 21 from the code. Next, the owner information recorded in the confidential print 21 is displayed as visible information on a display such as a reader, and the displayed visible information is collated with the owner information as the coloring area 5a.

Therefore, in addition to whether or not the personal authentication medium 30 has the confidential print 21, the owner information of the color-developing laminate material 5 and the information of the code included in the confidential print 21 are collated. Authenticity can be determined. Therefore, unauthorized use of counterfeits can be suppressed more reliably.

Personal authentication medium 30 further comprises a lower protective laminate 31 . The lower protective laminate material 31 is in contact with the surface of the first laminate material 3 opposite to the surface in contact with the second laminate material 4 . The lower protective laminate material 31 is transparent and has properties equivalent to those of the transparent protective laminate material 7 .

19 shows a planar image of the personal authentication medium 30. FIG. 19, the individual authentication medium 30 is attached to the lower protective laminate material 31 from the opposite side of the first laminate material 3, or from the transparent protective laminate material 7 from the opposite side of the chromogenic laminate material 5. In FIG. is irradiated with infrared rays. 19 conceptually shows an image of the personal authentication medium 30 obtained by an infrared camera from the opposite side of the transparent protective laminate material 7 to the color-developing laminate material 5. As shown in FIG.

As shown in FIG. 19, the infrared camera can obtain the marking of the confidential printing 21 in addition to the printing portion 8, the coloring area 5a, and the security patch 6. FIG. Therefore, the personal authentication medium 30 can determine the authenticity of the personal authentication medium 30 by the label of the confidential print 21 .

[Fifth embodiment of the present invention]
A personal authentication medium according to the fifth embodiment of the present invention will be described with reference to FIGS. 20 and 21. FIG. The fifth mode of the present invention differs from the fourth mode of the present invention in the code contained in the personal authentication medium. Therefore, the differences will be described in detail below. On the other hand, common points with the fourth embodiment of the present invention are denoted by reference numerals of the fourth embodiment of the present invention, and detailed description thereof is omitted.

The personal authentication medium contains one integrated code. The integrated code is composed of a first partial code and a second partial code. That is, the integrated code is one code in which the first partial code and the second partial code are integrated. The color-developing laminate material includes a first partial code in the code as a portion colored by irradiation with a laser beam. Confidential printing includes a second portion of code in the code. The personal authentication medium according to the fifth embodiment of the present invention will be described in more detail below with reference to FIGS. 20 and 21. FIG.

FIG. 20 is a plan view of the personal authentication medium when visually observing the personal authentication medium. That is, FIG. 20 shows the planar structure of the personal authentication medium with visible light.
As shown in FIG. 20, the personal authentication medium 40 includes a printing section 8, a coloring area 5a, and a security patch 6. FIG. The coloring area 5a includes the first partial code 41 in addition to the above-described identification photograph of the owner. The first partial code 41 is part of one two-dimensional code. The first partial code 41 does not function as a two-dimensional code by itself.

FIG. 21 shows a planar image of the personal authentication medium 40 in infrared. In FIG. 21, the lower protective laminate material 31 is irradiated with infrared rays from the side opposite to the first laminate material 3, or the transparent protective laminate material 7 is irradiated from the side opposite to the color-developing laminate material 5. ing. 21 conceptually shows an image of the personal authentication medium 40 obtained by an infrared camera from the opposite side of the transparent protective laminate material 7 to the color-developing laminate material 5. As shown in FIG.

As shown in FIG. 21, with the infrared camera, in addition to the printing portion 8, the coloring area 5a, and the security patch 6, the sign of the confidential printing 42 can be obtained. The confidential print 42 constitutes one two-dimensional code together with the first partial code 41 included in the coloring area 5a. The confidential printing 42 is an example of the second partial code. Therefore, a readable integrated code can be obtained from the personal authentication medium 40 by the infrared camera. The authenticity of the personal authentication medium 40 can be determined by the integrated code of the first partial code 41 obtained by the infrared camera and the second partial code which is the secret printing 42 .

According to the fifth aspect of the present invention, in order to forge the personal authentication medium 40, the second partial code and the first partial code 41 included in the color-developing laminate material 5 complement each other. A counterfeit of the authentication medium 40 needs to be created. Therefore, it is more difficult to forge the personal authentication medium 40 .

[Material for Forming Laminate]
(Laminate materials)
Paper or plastic sheets can be applied to the laminate materials 3, 4, 11, 12 constituting the laminate 1 and the laminate materials such as the transparent protective laminate material 7. FIG. Also, the laminate materials 3, 4, 11, 12 may be opaque or transparent. In the case where the concealment print 2 absorbs light outside the visible range and emits fluorescence in the visible range, the visibility of the concealment print 2 is reduced by the fact that the laminate materials 3, 4, 11, and 12 are transparent. improves.

The plastic sheet applied to the laminate material may be a thermoplastic sheet or the like. Plastic sheets include cellulose sheets, polycarbonate (PC) sheets, polyolefin (PO) sheets, ethylene vinyl alcohol (EVOH) sheets, polyvinyl alcohol (PVA) sheets, polyvinyl chloride sheets, polyethylene naphthalate (PEN) sheets, polyethylene terephthalate ( PET) sheet, polyester sheet, nylon sheet, acrylic sheet, or triacetyl cellulose (TAC) sheet. The polyolefin sheet may be a polyethylene (PE) sheet or a polypropylene (PP) sheet. A polyvinyl chloride sheet, an amorphous polyester sheet, and a polycarbonate sheet are suitable for processing to integrate the laminate 1 by heat, pressure, or the like.

Also, the opaque white laminate material may be a sheet containing a pigment such as TiO ₂ or a foamed sheet, in other words, a sheet containing homogeneous cells within the sheet. The opaque laminate material may have light scattering properties or light reflectivity to such an extent that the other side of the laminate material cannot be seen through when viewed from one side of the laminate material with the naked eye. Also, the second laminate material has infrared transmissivity or ultraviolet transmissivity. Also, the first laminate materials 3 and 11 may have infrared transmittance or ultraviolet transmittance. As a result, the signs indicated by the confidential prints 2, 21, and 42 can be identified through the second laminate material.

Furthermore, the laminate material 3, 4, 11, 12 may have dispersed therein color-changing particles. The strips are OVI (Optically variable Ink) or the like. Thereby, the security of the laminate 1 can be improved.

Each laminate may have a thickness of 25 μm or more and 200 μm or less. If the thickness of the laminated material is less than 25 μm, the physical strength of the laminated material may be insufficient. Further, when the thickness of the laminate material is less than 25 μm, wrinkles or the like may occur in the laminate material when printing is provided on the laminate material. On the other hand, when the thickness of the laminate material is thicker than 200 μm, the influence of variation in thickness and deflection of the laminate material itself may increase when the laminate material is processed. The thickness of the laminate material may be 50 μm or more and 150 μm or less.

(Color-developing laminate material)
The color-developing laminate material 5 is a laminate material that develops color when irradiated with a laser beam in the infrared region in the range of 700 nm to 1200 nm. The color-developing laminate material 5 is produced by adding the following additives to the plastics that can be used to form the laminate material described above, if necessary. The color-developing laminate material 5 may be opaque or transparent.

Examples of the additive include a material that absorbs the laser beam and the additive itself develops color, and a material that absorbs the laser beam to generate heat and carbonize the resin present around the additive.

The additive that develops color by absorbing a laser beam may be a compound containing a heavy metal. Compounds containing heavy metals include lead carbonate, lead sulfate, lead stearate, white lead, silver acetate, cobalt oxalate, cobalt carbonate, yellow iron oxide, basic bismuth acetate, bismuth hydroxide, nickel acetyl acetate, nickel lactate, citric acid. It may be copper acid and copper carbonate. These compounds develop colors due to chemical changes such as changes in the crystal structure of the metal ions contained in the compounds and changes in the amount of hydration contained in the crystals of the metal ions.

Additives that carbonize the resin present around the additive include silicon-containing inorganic compounds, silicon-containing pigments, non-white metal titanates, black organic dyes, non-black inorganic lead compounds, graphite, carbon black, and graphite. Alternatively, it may be an additive containing at least one of a metal hydroxide and a metal hydrate and a coloring agent.

The color-developing laminate material 5 is obtained by processing a plastic containing additives into a sheet.
The additive used for producing the color-developing laminate material 5 is arbitrarily selected according to the wavelength range of the laser beam irradiated to the color-developing laminate material 5, compatibility with the plastic for forming the color-developing laminate material 5, and the like. be able to. The amount of the additive to be added can be determined according to the energy absorption efficiency, printability on the color-developing laminate material, transferability, physical properties, and the like.

Specifically, the additive amount may be in the range of 0.1% by weight or more and 30% by weight or less with respect to the plastic that is the base material. Also, the additive amount may be in the range of 1% by weight or more and 10% by weight or less. If the amount added is less than 0.1% by weight, the color density may be lower when irradiated with a laser beam than if the amount added is 0.1% or more. This may reduce the visibility of the colored portion. If the amount added is more than 30% by weight, the printability and transferability of the color-developing laminate material 5 may deteriorate. Furthermore, the mechanical properties of the laminate may also be degraded.

The thickness of the color-developing laminate material 5 may be 25 μm or more and 250 μm or less. If the thickness of the color-developing laminate material 5 is less than 25 μm, the physical strength of the laminate material may be insufficient. If the thickness of the color-forming laminate material 5 is less than 25 μm, wrinkles may occur in the color-forming laminate material 5 when the color-forming laminate material 5 is provided with printing or the like. On the other hand, if the thickness of the color-developing laminate material 5 is greater than 200 μm, the influence of the thickness variation and deflection of the laminate material itself may increase when processing the color-developing laminate material 5 . The thickness of the color-developing laminate material 5 may be 50 μm or more and 150 μm or less.

The color-developing region 5a of the color-developing laminate material 5 is formed by a far-infrared laser including a _CO2 laser, a near-infrared pulse laser including an Nd:YAG laser and an Nd:YVO laser, a visible light pulse laser, an excimer laser, or the like. be able to. Moreover, the laser that forms the coloring region 5a may be a semiconductor laser, a femtosecond laser, or a picosecond laser. These lasers can also be combined to form the coloring region 5a.

The lasers capable of emitting light in the infrared region and the oscillation wavelengths of the lasers are as follows. A GaAlAs semiconductor laser oscillates a laser beam with a wavelength of 635 nm or more and 840 nm or less, and a GaAs semiconductor laser oscillates a laser beam with a wavelength of 840 nm. An InP semiconductor laser oscillates a laser beam with a wavelength of 910 nm, and a YAG laser oscillates a laser beam with a wavelength of 1064 nm.

The owner information of the coloring area 5a may be personal identification information. Personal authentication information may include biometric information, non-biometric information, or both. Biometric information is a feature specific to an authenticated individual among biometric features. Biometric information is, for example, signs or patterns such as facial features, fingerprints, veins, and irises. Non-biometric information is personal information other than biometric information. Non-biological information includes, for example, name, date of birth, age, blood type, sex, nationality, address, domicile, telephone number, affiliation, and social status. The non-biometric information may be characters formed by typing, a handwritten signature of the owner, or a combination thereof.

(Confidential printing)
The confidential prints 2, 21, and 42 can be formed by printing inks that are invisible to the naked eye and can be recognized by a discriminating device. Printing methods applied for covert printing 2, 21, 42 can be offset printing, gravure printing, letterpress printing, intaglio printing, screen printing, inkjet printing and laser printing. Owner information can be recorded as confidential print 2, 21, 42 by these printing methods.

In laser printing, the concealed printing 2, 21, 42 can be formed with ink that develops color when irradiated with a laser beam, or ink that is deactivated when irradiated with a laser beam. The ink that is deactivated by irradiation with a laser beam may be fluorescent ink or infrared absorbing ink. In the case of fluorescent ink inactivated by irradiation with a laser beam, the fluorescence emitted by the ink is reduced by the irradiation with the laser beam. In an infrared-absorbing ink deactivated by irradiation with a laser beam, the absorbance of infrared rays is reduced by the irradiation with a laser beam.

The inks used in these printing methods may be offset inks, letterpress inks, gravure inks, letterpress inks, intaglio inks, screen inks, inkjet inks, and the like, depending on the printing method. The ink may be resin ink, oil ink, and water-based ink. The ink may be an oxidative polymerization ink, a penetration drying ink, an evaporation drying ink, or an ultraviolet curing ink, depending on the method of drying the ink.

The covert print 2, 21, 42 presents the marking by absorbing electromagnetic radiation outside the range of visible light. On the other hand, the security printing 2, 21, 42 conceals the sign under visible light. The security printing 2, 21, 42 may contain phosphors, and the light outside the visible range may be light that excites the phosphors. In this case, since the secret prints 2, 21, 42 are excited by absorbing light outside the visible region, when the laminate is observed in the visible region, the secret prints 2, 21, . It is difficult for an observer to notice that 42 is provided.

In addition, the light outside the visible region is light in the infrared region, and the security prints 2, 21, and 42 absorb light in the infrared region, and the detectable labels absorb light in the infrared region. It can also be a label that forms. In this case, since the security prints 2, 21, and 42 absorb light contained in the infrared region, the security prints 2, 21, and 42 on the sign photographed by the camera are illuminated by the illumination emitting infrared rays and the infrared camera. 42 can be identified.

The ink for concealment printing may be ink that has no absorption in the visible region and that emits fluorescence when irradiated with specific light outside the visible region. Ink for confidential printing may also contain a material having absorption properties in the infrared region, in other words, an infrared absorber.

The material that imparts fluorescence may be an ultraviolet phosphor or a phosphor that emits fluorescence in the visible region when irradiated with infrared rays. UV phosphors _{are Ca2B5O3Cl} : _Eu2 ⁺ , _CaWO4 , ZnO: _Zn2SiO4 :Mn, _Y2O2S :Eu, _ZnS :Ag _{, YVO4} :Eu _{, Y3O3} . :Eu, _Gd2O2S : _{Tb , La2O2S} : _Tb , or _Y3Al5O12 : _Ce . Moreover, it can be made into these arbitrary mixtures. It may also be a mixture of the same or different types. The ultraviolet phosphor is a phosphor that emits fluorescence in the visible region by absorbing the ultraviolet rays irradiated to each phosphor.

YF ₃ :YB, Er, ZnS:CuCo, or the like may be used as the phosphor that emits fluorescence in the visible region when irradiated with infrared rays. LiNd _0.9 Yb _0.1 P ₄ O ₁₂ , LiBi _0.2 Nd _0.7 Yb _0.1 P ₄ O ₁₂ , Nd _{0.9Yb0.1Nd5 ( MoO4 ) 4 , NaNb0.3Yb0.1P4O12 , Nd0.8Yb0.2Na5 ( WO4 ) 4 , Nd0.8Yb0 _ .2 Na5 ( Mo0.5WO0.5 ) 4 , Ce0.05Gd0.05Nd0.75Yb0.25Na5 ( W0.7Mo0.3O4 ) 4 , Nd0 _ .3 Yb0.1Al3 ( BO3} ) ₄ , _{Nd0.9Yb0.1Al2.7Cr0.3 ( BO3 ) 4 , Nd0.4P5O4 or Nd0 . 8Yb0.2K3 ( PO4} ) _{2 .} Moreover, it can be made into these arbitrary mixtures.

Also, the phosphor that emits fluorescence may be a homogeneous or heterogeneous mixture of these phosphors. The phosphor of the same kind is a phosphor having a similar crystal structure if the phosphor is crystalline, and a phosphor having a similar molecular structure if the phosphor is amorphous, and a different phosphor is a phosphor crystal. Structures and molecular structures are not similar. For example, a mixture of LiNd _0.9 Yb _0.1 P ₄ O ₁₂ crystals having the same crystal structure but different crystal sizes is a homogenous mixture. Further, for example, LiNd _0.9 Yb _0.1 P ₄ O ₁₂ and Nd _0.9 Yb _0.1 Al _2.7 Cr _0.3 (BO ₃ ) ₄ having different crystal structures have different crystal sizes. A mixture of things is a mixture of different species. However, a mixture of a crystalline substance and an amorphous substance having the same composition is a homogeneous mixture. Hereinafter, the same definition is applied to materials such as resin.

When producing an ink containing the above-mentioned phosphor, the phosphor contained in the ink is selected from the detection wavelength, in other words, the emission wavelength of the phosphor, the dispersibility, the emission intensity, the safety, etc. be decided. The phosphor can be dispersed in the ink in the range of 2 wt % to 15 wt %, or in the range of 3 wt % to 5 wt %.

By forming the confidential printings 2, 21, and 42 using such ink, the confidential printing 2 is irradiated with ultraviolet light from a black lamp, or infrared rays, in other words, light having a wavelength of 780 nm or more. , 21 and 42 can be observed.

The infrared absorbent may be an organic pigment, an organic dye, or an inorganic pigment. Also, a mixture of organic pigments, a mixture of organic dyes, or a mixture of inorganic pigments can be used. Also, a mixture of an organic pigment and an organic dye, a mixture of an inorganic pigment and an inorganic pigment, a mixture of an inorganic pigment and an organic pigment, an organic pigment, an organic dye, and an inorganic pigment may be a mixture of Organic pigments or organic dyes may be phthalocyanine compounds, naphthalocyanine compounds, anthraquinone compounds, dimonium compounds, or cyanine compounds. It may also be a mixture of these same compounds or different compounds. The inorganic pigment may be lanthanum hexaboride, cesium tungsten oxide, indium tin oxide, or antimony tin oxide. Moreover, it may be a mixture of the same compositional formula or different compositional formulas.

The infrared absorbing agent can have the property of absorbing light in the near infrared range of 700 nm or more and 1200 nm or less. An ink is prepared using an infrared absorbing agent, and the ink is printed on the first laminate material or the second laminate material by a predetermined printing method. Thereby, the confidential print 2 of a predetermined pattern can be formed.

The confidential printings 2, 21, and 42 may have areas printed with two or more types of inks having mutually different absorption wavelength characteristics or emission wavelength characteristics. In other words, the confidential print 2 may include a first area formed using the first ink and a second area formed using the second ink. The second ink is an ink different from the first ink in at least one of the characteristics of the absorption wavelength and the characteristics of the emission wavelength. The counterfeit resistance of the laminate 1 can be improved by manufacturing the laminate 1 by combining a plurality of inks having different absorption wavelength characteristics, emission wavelength characteristics, or both.

Moreover, it is desirable that the concealment prints 2, 21, 42 are formed within a range of area smaller than the areas of the first laminate materials 3, 11 and the second laminate materials 4, 12. FIG. In other words, the concealment printing 2 is formed in a region inside the edges of the first laminate materials 3 and 11 and inside the edges of the second laminate materials 4 and 12 when viewed from the thickness direction of the laminate 1. can do. Furthermore, in other words, the concealment prints 2, 21, 42 can be formed in the regions of the laminate 1 excluding the ends.

As a result, it becomes difficult to determine from the end portion of the laminate 1 that the concealment prints 2 , 21 , 42 are present between the first laminate materials 3 , 11 and the second laminate materials 4 , 12 . In addition, since the confidential printings 2, 21, 42 do not exist at the end portions of the laminate 1, the first laminate materials 3, 11 and the second laminate materials 4, 12 can be kept in close contact with each other. , peeling of the second laminate materials 4, 12 from the first laminate materials 3, 11 can be prevented.

(Security patch)
A security patch may be an optical structure. A security patch using an optical structure is an element whose authenticity can be determined visually, or an element whose authenticity can be determined using a verifier or the like.

Elements that can be visually authenticated include elements that determine the authenticity of elements based on the optical diffraction effect of the elements, and elements that change the color of the element according to the angle at which the element is observed, in other words, color shift. and the like. Elements that determine the authenticity of an element based on the optical diffraction effect are holograms having a relief structure. An element whose color changes depending on the angle at which the element is observed is a multilayer film in which layers of inorganic compounds or metal materials having different optical properties are laminated.

The security patch may contain fluorescent material. With such a security patch, the authenticity of the security patch is determined by irradiating the security patch with light of a specific wavelength. The security patch may have a cholesteric liquid crystal layer. With such security patches, the authenticity of the security patch can be determined by a verifier.

As described above, the laminate 1 of this embodiment includes the security patch 6 having a relief structure. Security patch 6 may be a relief structure. The security patch 6 comprises a relief layer 6a, a deposition layer 6c and an adhesive layer 6d, the relief layer 6a comprising a relief surface 6b, as described above. A transfer foil may be formed by sequentially laminating a relief layer 6a, a deposited layer 6c, and an adhesive layer 6d on a support laminate material, and the security patch 6 may be transferred from the transfer foil onto the color-developing laminate material 5 by heat and pressure. good.

Thermoplastic resins, thermosetting resins, ultraviolet or electron beam curable resins can be used as materials for the relief layer 6a. The thermoplastic resin may be an acrylic resin, an epoxy resin, a cellulose resin, a vinyl resin, or a polycarbonate resin. The thermosetting resin may be a melamine-based resin, a phenol-based resin, or a urethane resin obtained by adding polyisocyanate as a cross-linking agent to a reactive hydroxyl group-containing acrylic polyol or polyester polyol. The UV or electron beam curable resin may be epoxy (meth)acrylic or urethane (meth)acrylate. The resin forming the relief layer 6a may be a mixed resin.

An observer of the laminate 1 observes the coloring region 5 a and the like through the security patch 6 . Therefore, the relief layer 6a is preferably transparent.
As a method for recording the marker pattern on the relief surface 6b, a two-beam interferometry method using a laser as a light source and a method for manufacturing various holograms can be applied. The holograms may be image holograms, Lippmann holograms, Renbo holograms, integral holograms, and the like.

Further, the uneven pattern of the relief surface 6b can also be formed by transferring the uneven pattern of the original onto a precursor layer of the relief layer 6a. The concave-convex pattern of the original can be formed by irradiating the surface of the resist with an electron beam and exposing it so as to draw a striped pattern that serves as a diffraction grating. Thereby, a master plate having an uneven pattern can be obtained.

In this case, it is possible to control the shape and the direction of extension of the striped pattern that becomes the diffraction grating for each line. Therefore, like a hologram, any three-dimensional mark or changing mark can be recorded on the relief surface 6b. A changing indicator is an indicator that includes two or more indicators that change according to the angle at which the security patch 6 is observed. It is also possible to divide a striped pattern for displaying a sign into a plurality of cell regions, record a different diffraction grating for each cell region, and express a single sign as a whole by a set of a plurality of cell regions. be. There are no particular restrictions on the shape of each pixel. Therefore, the shape of each cell may be any shape such as circular dots, rectangular dots, and star-shaped dots.

It is also possible to form an uneven pattern corresponding to the relief surface 6b by an induced surface relief formation method. That is, an amorphous thin film of a polymer having azobenzene as a side chain is irradiated with relatively weak light having a wavelength in the range from blue to green and an illuminance of several tens of mW/cm ² . This causes movement of polymer molecules on a scale of several μm, and as a result, a relief can be formed on the surface of the thin film by irregularities caused by the movement of polymer molecules. Thereby, a master plate having an uneven pattern can be obtained.

By forming a metal film on the surface of a master plate having a pattern of protrusions and recesses using an electroplating method, a press plate that is a copy of the pattern of protrusions and recesses of the master plate can be obtained. Then, the relief surface 6b can be formed by thermocompression bonding a press plate to the relief layer 6a to transfer a fine uneven pattern to the surface of the relief layer 6a.

(Sediment layer)
A deposited layer 6c may be provided partially or entirely on the relief surface 6b. The deposited layer 6c can enhance the optical functionality of the security patch 6 or impart additional properties to the security patch 6. FIG. The deposited layer 6c may be omitted. The deposited layer 6c may be a metal layer, a silicon oxide layer, or a metal compound layer. The metal forming the metal layer may be Al, Sn, Cu, Au, Ag, Co, or alloys thereof. The deposited layer 6c can be formed by a deposition method. A vacuum deposition method, a sputtering method, an ion plating method, or the like can be applied to the deposition method. The deposited layer 6c may have a specific contour by being partially removed by an etching method or the like.

Since an observer of the laminate 1 observes the coloring region 5a through the security patch 6, the deposited layer 6c is more preferably transparent. The transparent deposited layer 6c may be a dielectric with a different index of refraction than the relief layer 6a. The dielectric may be silicon oxide or a metal compound. Metal compounds may be metal oxides, metal sulfides, metal nitrides, metal fluorides, metal salts. Metal sulfides can be Sb ₂ S ₃ , CdS, ZnS. Metal oxides include _{Fe2O3 , TiO2} , CeO2, _CdO , _{Sb2O3 ,} WO3 _, SiO _{, Si2O3 , In2O3} , PbO, _{Ta2O3 ,} ZnO, _ZrO2 , _It may be _{Cd2O3 or Al2O3} . The metal salt may be _PbCl2 and the like. The transparent deposited layer 6c can be formed by a deposition method or the like. The deposition method may be a vacuum deposition method, a sputtering method, or an ion plating method.

(adhesion layer)
The material of the adhesive layer 6d may be a heat-sensitive adhesive or a pressure-sensitive adhesive. The main ingredients of heat-sensitive adhesives are acrylic resin, polyester resin, vinyl chloride-vinyl acetate copolymer resin, ethylene-acrylate copolymer resin, ethylene-methacrylate copolymer resin, polyamide resin, and polyolefin. resin, chlorinated polyolefin resin, epoxy resin, or urethane resin. Also, the main agent may be a mixed resin of these resins.

Also, the pressure-sensitive adhesive may be vinyl chloride-vinyl acetate copolymer, polyester polyamide, acrylic, butyl rubber, natural rubber, silicon, or polyisobutyl adhesives. The pressure sensitive adhesive may also be a mixture of these pressure sensitive adhesives. The pressure sensitive adhesive may contain additives. Additives may be flocculating components, modifying components, polymerization initiators, plasticizers, hardeners, accelerators, tackifiers, fillers, softeners, heat stabilizers, or antioxidants. The pressure sensitive adhesive may contain one additive or multiple additives.

The flocculating component can be an alkyl methacrylate flocculant, a vinyl ester flocculant, an acrylonitrile flocculant, a styrene flocculant, or a vinyl monomer flocculant. The flocculating component may contain one or more of these flocculating agents.

The modifying component may be an unsaturated carboxylic acid modifier, a hydroxy group-containing monomer modifier, an acrylonitrile modifier, and the like. The modifying component may contain one or more of these modifiers.

The adhesion imparting agent is a rosin-based agent, a terpene phenol agent, a terpene agent, an aromatic hydrocarbon-modified terpene agent, a petroleum agent, a coumarone/indene resin agent, a styrene-based agent, a phenol-based petroleum agent, or a xylene agent. good. The filler may be powder. The powder may be zinc oxide powder, titanium oxide powder, silica powder, calcium carbonate powder, barium sulfate powder, and the like.

Softeners may be process oils, liquid rubbers, or plasticizers. Thermal stabilizers may be benzophenone-based agents, benzotriazole-based agents, or hindered amine-based agents. Antioxidants may be anilides, phenolics, phosphites, or thioesters.
The thickness of the adhesive layer 6d may be 0.1 μm or more and 10 μm or less. Also, the thickness of the adhesive layer 6d may be 1 μm or more and 5 μm or less.

(printing department)
The printed portion 8 may be in the form of an identification photograph, letters, numbers, signs, patterns, geometric patterns, or the like. Thereby, the information and design property included in the printing unit 8 can be imparted to the laminate 1 . The printed portion 8 is located in the entire laminate 1 or a part of the laminate 1 in a plan view facing the plane on which the laminate 1 extends.

The printed portion 8 can be formed by a printing method using ink. The printing method may be an offset printing method, a gravure printing method, a relief printing method, an intaglio printing method, a screen printing method, or an inkjet printing method.

The inks used in these printing methods may be offset inks, letterpress inks, gravure inks, letterpress inks, intaglio inks, screen inks, inkjet inks, or the like, depending on the printing method. The ink may be resin ink, oil ink, or water-based ink. The ink may be an oxidative polymerization type ink, a penetration drying type ink, an evaporative drying type ink, or an ultraviolet curing type ink.

The ink forming the printing part 8 may be a functional ink. The printed portion 8 formed of functional ink changes its color according to the angle at which the laminate 1 is irradiated with light or the angle at which the laminate 1 is observed. Functional inks may be optical change inks, color shifting inks, or pearl inks.

The printing section 8 may be formed by electrophotography using toner. In this case, toner is prepared by attaching color particles such as graphite and pigment to plastic particles having chargeability. Then, the toner is transferred to the printing medium by using static electricity generated by charging. Then, the printed portion 8 can be formed by heating the transferred toner to fix the toner on the printing medium.

[Example]
A material that absorbs light in the near-infrared region and does not absorb light in the visible region was prepared, and an ink for forming the confidential print 2 was prepared. Next, a first laminate material 3, which is a white laminate material, was prepared, and ink was printed on the first laminate material 3 in a pattern. Thus, the confidential print 2 was formed. At this time, as described above with reference to FIG. 7, when viewed from the thickness direction of the first laminate material 3, a frame print 2a having a frame shape surrounding the ID photo formed on the personal authentication medium 10 is formed. did. Since ink that does not absorb light in the visible region was used to form the concealment print 2, it was found that it was difficult to confirm the concealment print 2 by visually observing the first laminate material 3.

Next, a transfer foil for transferring the security patch 6 onto the color-developing laminate material 5 was prepared. First, a PET film having a thickness of 25 μm was prepared as a support. Next, in order to form the relief layer 6a, an ink containing acrylic urethane was prepared, and a precursor layer having a thickness of 2 μm was formed on the support by gravure printing. After removing the solvent from the precursor layer by volatilizing the solvent contained in the precursor layer, a metal cylindrical plate having an uneven relief was pressed against the precursor layer to carry out roll forming. Thereby, a relief layer 6a including a relief surface 6b was formed. When pressing the metal cylindrical plate against the precursor layer, the press pressure was set to 2 Kgf/cm ² , the press temperature was set to 240° C., and the press speed was set to 10 m/min.

Then, a ZnS layer, which is the deposited layer 6c, was formed on the relief surface 6b using a vacuum deposition method. Thereafter, a polyester ink was printed on the deposition layer 6c by gravure printing, and the solvent contained in the ink was volatilized and removed from the ink, thereby forming the adhesion layer 6d. Thus, a transfer foil containing the security patch 6 was obtained.

A color-developing laminate material 5 (LEXAN (registered trademark) SD8B94, manufactured by SABIC) having a thickness of 100 μm was prepared. A security patch 6 was provided on the color-developing laminate material 5 by transferring a transfer foil containing the security patch 6 to the color-developing laminate material 5 using a hot stamp transfer device, and then removing the support. At this time, in the hot stamp transfer device, the transfer temperature was set to 120° C., and the transfer time was set to 1 second. Next, using an ink-jet printer, a printed portion 8 was printed on the surface of the color-developing laminate material 5 on which the security patch 6 was positioned.

A first laminate material 3, a second laminate material 4, a color-developing laminate material 5 to which a security patch 6 was transferred, and a transparent protective laminate material 7 were stacked in the order described, and these laminate materials were laminated under heat and pressure. . In the hot-press lamination, the temperature was set at 200° C., the pressure was set at 80 N/cm ² and the time was set at 25 minutes. After that, a laminate 1 was obtained by cutting a part of the laminate obtained by hot-press lamination into a card shape.

The first laminate material 3 is irradiated with light from the side opposite to the second laminate material 4, and the transparent protective laminate material 7 is laminated while being observed with an infrared camera from the side opposite to the color-developing laminate material 5. Body 1 was irradiated with a laser beam. At this time, the surface layer of the color-developing laminate material 5 is placed within the area surrounded by the frame print 2 a in the color-developing laminate material 5 when viewed from the thickness direction of the laminate 1 . was irradiated with a laser beam to print a facial photograph. A laser printer (emission wavelength: 1064 nm) was used for laser beam irradiation. Thus, the personal authentication medium 10 was obtained.

When the personal identification medium 10 was visually observed, it was confirmed that the facial photograph formed by the security patch 6, the printed portion 8, and the coloring area 5a could be confirmed at the same time. Further, the first laminate material 3 is irradiated with light from the side opposite to the second laminate material 4, and the transparent protective laminate material 7 is observed from the side opposite to the color-developing laminate material 5 using an infrared camera. did. As a result, the confidential print 2, that is, as described above with reference to FIG. It was confirmed that it could be confirmed.

The personal authentication medium 10 was tampered with by the following method. First, the transparent protective laminate material 7 was peeled off from the color-developing laminate material 5, and the color-developing region 5a on the surface layer of the color-developing laminate material 5 was scraped off. Next, a transparent protective laminate material 7 was attached to the color-developing laminate material 5, and a facial photograph different from the facial photograph possessed by the authentic personal authentication medium 10 was written as a falsified mark 9 using a laser printer. As a result, a falsified personal authentication medium 10A is obtained.

The tampered personal authentication medium 10A is irradiated with light from the opposite side of the first laminate material 3 of the tampered personal authentication medium 10A from the second laminate material 4, and the transparent protective laminate material 7 is color-developed laminated. An infrared camera was used to observe the tampered personal authentication medium 10A from the opposite side of the material 5 . As a result, as described above with reference to FIG. 14, a plurality of characters "GENUINE", the frame print 2a, and the face photograph protruding from the area defined by the frame print 2a were observed. As a result, it was confirmed that the falsified personal authentication medium 10A was obtained by falsifying the authentic personal authentication medium 10. FIG.

As described above, according to one embodiment of the laminate and the personal authentication medium, the effects listed below can be obtained.
(1) Observing the laminates 1, 20 or the personal authentication media 10, 30, 40 unless it is known in advance that the laminates 1, 20 or the personal authentication media 10, 30, 40 have the confidential printings 2, 21, 42 Even if this is done, there is a high possibility that the observer will not notice the existence of the confidential printings 2, 21, and 42. Therefore, even if the layered bodies 1, 20 or the personal authentication media 10, 30, 40 are forged, the false layered bodies 1, 20 or the personal authentication media 10, 30, 40 will have the concealed printing 2, 21, 42. Most likely not. Therefore, by confirming whether the laminate 1, 20 or the personal authentication medium 10, 30, 40 is provided with the confidential printing 2, 21, 42, the laminate 1, 20 or the personal authentication medium 10, 30, 40 authenticity can be determined. In this way, since it is possible to identify a counterfeit laminated body or personal authentication medium based on the presence or absence of the confidential printing 2, 21, 42, it is possible to suppress unauthorized use of counterfeits.

(2) The laminates 1, 20 or the personal authentication media 10, 30, 40 are more susceptible to counterfeiting than the security patch 6 included between the color-developing laminate material 5 and the transparent protective laminate material 7 and the printing of ink or the like. and a chromogenic laminate material 5 on which difficult-to-record information is recorded. Therefore, it is more difficult to forge the laminates 1, 20 or the personal authentication media 10, 30, 40.

(3) Since the concealment prints 2, 21, 42 are excited by absorbing light outside the visible range, when the laminates 1, 20 or the personal authentication media 10, 30, 40 are observed in the visible range, It is difficult for an observer to notice that the layered bodies 1, 20 or the individual authentication media 10, 30, 40 are provided with the confidential printings 2, 21, 42.例文帳に追加

(4) Since the security printing 2, 21, 42 absorbs the light contained in the infrared region, the security printing 2, 21, 42 is confirmed in the sign photographed by the camera by the illumination emitting infrared rays and the infrared camera. can do.

(5) In addition to whether or not the laminates 1, 20 or the personal authentication media 10, 30, 40 include the confidential printings 2, 21, 42, the confidential printings 2, 21, 42 are codes containing specific information. It is also possible to determine the authenticity of the laminated body 1, 20 or the personal authentication medium 10, 30, 40 depending on whether or not it is. Therefore, unauthorized use of counterfeits can be suppressed more reliably.

(6) In order to forge the personal authentication medium 40, the first partial code 41 and the first partial code 41 included in the color-developing laminate material 5 are complemented by the second partial code included in the confidential print 42. It is necessary to form a two-part code. Therefore, it is more difficult to forge the personal authentication medium 40 .

(7) The authenticity of the personal authentication medium 10 can be determined depending on whether the position of the owner information is displaced from the position of the frame print 2a included in the confidential print 2 or not.
(8) In addition to checking whether or not the personal authentication media 30 and 40 have the confidential prints 21 and 42, the owner information of the color-developing laminate material 5 and the code information included in the confidential prints 21 and 42 are collated. Thus, the authenticity of the personal authentication media 30, 40 can be discriminated. Therefore, unauthorized use of counterfeits can be suppressed more reliably.

In addition, the embodiment described above can be implemented with the following changes.
[code]
• The stack 1, 20 or the personal identification medium 10, 30, 40 may contain two codes. In this case, the confidential prints 2, 21, and 42 include a first code containing predetermined information, and the color-developing laminate material 5 includes predetermined information as the color-developing region 5a, and the first code is A different second code can be included. Among the first code and the second code, one code can contain information to be authenticated, and the other code can contain information for authenticating the information to be authenticated. Thereby, the following effects can be obtained.

(9) Whether or not the laminate includes only one of the first code and the second code, in order to determine the authenticity of the laminate based on whether the laminate includes both the first code and the second code Unauthorized use of counterfeits can be suppressed more reliably than when authenticity is determined based on whether or not.
Note that the second code may be included in the printing section 8 instead of the coloring area 5a.

- In the fifth embodiment of the present invention, the first partial code 41 that constitutes one code may be included in the printing section 8 instead of being included in the coloring region 5a of the color-developing laminate material 5 . Even in this case, the effect according to (6) described above can be obtained.

[First laminate material and second laminate material]
- Each of the first laminate material 3, 11 and the second laminate material 4, 12 may be transparent, as described above. In this case, the concealment prints 2, 21, 42 sandwiched between the first laminate materials 3, 11 and the second laminate materials 4, 12 should transmit light in the visible range. Thereby, even if both the first laminate materials 3, 11 and the second laminate materials 4, 12 are transparent, the concealment prints 2, 21, 42 are concealed from the outside when observed in the visible range.

• Each of the first laminate material 3,11 and the second laminate material 4,12 may be opaque, as described above. In this case, the concealment prints 2, 21, 42 sandwiched between the first laminate materials 3, 11 and the second laminate materials 4, 12 may partially absorb light in the visible region. Even in this case, since both the first laminate materials 3, 11 and the second laminate materials 4, 12 are opaque, the concealment prints 2, 21, 42 are hidden from the outside when observed in the visible region. Just do it.

[Print section]
- The laminated body 1 only needs to include the first laminate material 3, the second laminate material 4, and the concealment printing 2, and does not need to include the printing unit 8.

[Confidential Print]
- The confidential printing in the 1st form of this invention to the 5th form of this invention can be combined. That is, the confidential print can include at least one of a string, a locator, and a code. In addition, confidential printing can also include numbers, patterns, and the like.

[Combination of forms]
- The first to fifth aspects of the present invention can be combined. Also, combined aspects of the invention can have a synergistic effect.

1, 20... Laminate, 2, 21, 42... Concealment printing, 2a... Frame printing, 3, 11... First laminate material, 4, 12... Second laminate material, 5... Color development laminate material, 5a... Color development area , 6... security patch, 6a... relief layer, 6b... relief surface, 6c... deposit layer, 6d... adhesive layer, 7... transparent protective laminate material, 8... printed part, 9... tampered sign, 10, 30, 40 Personal authentication medium 10A Falsified personal authentication medium 31 Lower protective laminate material 41 First partial code.

Claims (13)

a first laminate material;
a second laminate material;
and a concealment print formed with invisible ink between the first laminate material and the second laminate material,
The concealment printing absorbs electromagnetic radiation outside the range of visible light through at least one of the first laminate material and the second laminate material so that the concealment print exhibits a sign, and the sign is visible with visible light. concealed ,
The second laminate material is
A first surface in contact with the confidential printing and a second surface opposite to the first surface,
a color-developing laminate material that develops color when irradiated with a laser beam in contact with the second surface;
a security patch located on the surface of the color-developing laminate material opposite to the surface in contact with the second surface;
a protective laminate covering the security patch and transmitting light in the visible range.
laminate. The confidential printing includes a phosphor,
The laminate according to claim 1 , wherein the light outside the range of visible light is light that excites the phosphor. The first laminate material and the second laminate material are white laminate materials,
the light outside the range of visible light is light in the infrared region;
The confidential printing absorbs light in the infrared region,
The laminate according to claim 1 , wherein the label is a label formed by light in the infrared region. The laminate according to any one of claims 1 to 3 , wherein the confidential printing includes a code containing predetermined information. The confidential printing includes a first code containing predetermined information,
The color-developing laminate material includes a second code that contains predetermined information and is different from the first code as a portion that is colored by irradiation with the laser beam,
2. The laminate according to claim 1 , wherein one of said first code and said second code contains information to be authenticated, and the other code contains information for authenticating said information to be authenticated. The laminate includes one cord,
The code is composed of a first partial code and a second partial code,
The color-developing laminate material includes the first partial code as a portion colored by irradiation with the laser beam,
The laminate according to claim 1 , wherein the confidential printing includes the second partial code. a first laminate material;
a second laminate material;
and a concealment print formed with invisible ink between the first laminate material and the second laminate material,
The concealment printing absorbs electromagnetic radiation outside the range of visible light through at least one of the first laminate material and the second laminate material so that the concealment print exhibits a sign, and the sign is visible with visible light. concealed,
The second laminate material is
A first surface in contact with the confidential printing and a second surface opposite to the first surface,
Further comprising a color-developing laminate material that is in contact with the second surface and develops color when irradiated with a laser beam
laminate. A personal authentication medium comprising the laminate according to any one of claims 1 to 7,
A personal authentication medium including owner information for identifying an owner of the personal authentication medium. 9. The personal authentication medium according to claim 8, wherein the confidential printing includes a positioning portion used for positioning the owner information on the personal authentication medium. A personal authentication medium comprising the laminate according to claim 1 ,
The color-developing laminated material includes owner information for identifying the owner of the personal authentication medium as a portion colored by the irradiation of the laser beam,
The confidential printing includes a code including information related to the owner information. Personal authentication medium. A confidential print that includes owner information and records a machine-readable code, and a coloring area that includes the same owner information as the confidential print and records a human-readable character string. verifying the containing personal authentication medium by the absorption wavelength or coloring wavelength of the confidential printing;
reading the owner information recorded in the confidential print from the code by a reader;
displaying the owner information read by the reader on a display as visible information;
comparing the displayed visible information with the owner information of the coloring area to determine the authenticity of the personal authentication medium ;
The personal authentication medium includes a laminate,
The laminate is
a first laminate material;
a second laminate material;
The concealment printing formed with invisible ink between the first laminate material and the second laminate material,
The concealment printing absorbs electromagnetic radiation outside the range of visible light through at least one of the first laminate material and the second laminate material so that the concealment print exhibits a sign, and the sign is visible with visible light. concealed,
The second laminate material is
A first surface in contact with the confidential printing and a second surface opposite to the first surface,
The laminate is
a color-developing laminate material that develops a color by irradiation with a laser beam in contact with the second surface, the color-developing laminate material including the color-developing region;
a security patch located on the surface of the color-developing laminate material opposite to the surface in contact with the second surface;
and a protective laminate covering the security patch and transmitting light in the visible range.
A method for determining the authenticity of a personal authentication medium. 12. The authenticity determination method for a personal authentication medium according to claim 11, wherein said owner information recorded in said coloring area is plain text. The machine-readable code is composed of a first partial code and a second partial code,
12. The authenticity determination method for a personal authentication medium according to claim 11, wherein the first partial code is the coloring area, and the second partial code is the confidential printing.

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