JPH08324094A - Forgery preventing printed matter - Google Patents

Abstract

PURPOSE: To enhance forgery preventing properties while dispensing with an exclusive genuineness judging device by providing a micro-character between a transparent base material and the concealing layer thereof and generating the shift of a focal distance by the thickness of the transparent base material at a time of the forgery by a color copier to make the micro-character impossible to read. CONSTITUTION: Forgery preventing printed matter is obtained by successively laminating a first printing layer 2, a concealing layer 3 and a second printing layer 4 on the single surface of a transparent base material 1 and at least a part of the first printing layer 2 shows a micro-character.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a stock certificate, a bond, a check,
It relates to anti-counterfeit printed matter that requires anti-counterfeiting measures such as lottery tickets, gift certificates, ID cards, etc., and in particular, forgery by a color copying machine is made possible by using a transparent base material and partially concealing or exposing the transparent base material. The present invention relates to an anti-counterfeit printed matter that can be prevented.

[0002]

2. Description of the Related Art In recent years, due to the dramatic progress of color copying machines, counterfeiting of securities using color copying machines has become conspicuous. Therefore, various anti-counterfeiting techniques have been developed that make use of the characteristics of color copiers.

This kind of anti-counterfeiting technique includes an ink in which when a color copy is made, another color is obtained by printing with a colorant ink having a sharp peak in the spectral reflectance curve. There is also a method in which a part of the lines is changed to a direction that does not affect the scanning and scanning of the color copying machine, and when copying, only the parts of the lines with different directions float. In addition, there is a method in which, when copying is performed by combining halftone dots and lines, the distinction between halftone lines and lines is emphasized.
Further, there is a method of providing a micro character having a resolution equal to or lower than the copy resolution. There is also a system in which special ink such as magnetic ink is provided in a part of printing.

[0004]

However, the above-mentioned forgery prevention technique has a problem that the forgery prevention effect is being lost due to the progress of the color copying machine. Further, although it is possible to prevent forgery by a specific color copier, it may not be possible to prevent forgery by another color copier.

Further, in the case of a system in which a special ink such as a magnetic ink is provided, the authenticity cannot be determined unless a measuring instrument equipped with a magnetic head or the like is used, which is inconvenient.
The present invention has been made in consideration of the above circumstances, in which micro characters are provided between the transparent base material and the concealing layer thereof, and at the time of forgery by a color copying machine, the focal length of the transparent base material is equal to the thickness of the transparent base material. It causes misalignment and makes micro characters unreadable,
Therefore, it is possible to provide an anti-counterfeit printed matter that can improve anti-counterfeit property without requiring a dedicated authenticity determination device.

Another object of the present invention is to provide a forgery-preventing printed material which can prevent forgery by a color copying machine with a simple structure by partially concealing or exposing the transparent substrate. To do.

[0007]

The invention according to claim 1 provides a first printing layer, a hiding layer, and a second layer on one surface of a transparent substrate.
The printed layer is sequentially laminated, and at least a part of the first printed layer is an anti-counterfeit printed matter in which at least a part of the first printed layer shows micro characters.

The invention corresponding to claim 2 is the anti-counterfeit printed matter according to claim 1, wherein the concealing layer is formed so as to expose at least a part of the transparent base material. is there.

Further, the invention according to claim 3 is the anti-counterfeit printed matter according to claim 1 or 2.
The concealment layer is an anti-counterfeit printed matter having a window opening for exposing a part of the transparent substrate.

In the invention according to claim 4, the first printing layer is formed on one surface of the transparent substrate, and the concealing layer and the second printing layer are sequentially laminated on the other surface of the transparent substrate. And the hiding layer is an anti-counterfeit printed matter formed so as to expose at least a part of the transparent substrate.

Further, the invention corresponding to claim 5 is the anti-counterfeit printed matter according to claim 4, wherein the concealing layer includes a window opening portion for exposing a part of the transparent base material. It is a printed matter.

The invention according to claim 6 is the anti-counterfeit printed matter according to claim 2 or claim 3, wherein the transparent base material has an embossed portion formed in a portion exposed by the hiding layer. It is an anti-counterfeit printed matter.

Further, the invention corresponding to claim 7 is the anti-counterfeit printed matter according to any one of claims 1 to 3 and 6, wherein the first printing layer has a visual sensitivity. It is an anti-counterfeit printed matter containing a colored colorant whose spectral reflectance greatly changes in a low wavelength region.

The invention according to claim 8 is the anti-counterfeit printed matter according to any one of claims 1 to 3 and 6, wherein the first printing layer is formed by irradiation with ultraviolet rays. An anti-counterfeit printed matter containing a colorless transparent or white inorganic phosphor that causes a change in color tone pattern.

Next, materials applied to the anti-counterfeit printed matter of the present invention will be described. Note that the materials shown below are examples, and the materials are not limited to these as long as the intention of the present invention is not impaired.

As the transparent base material, plastic such as polyethylene terephthalate (hereinafter referred to as PET), glass or the like can be used, and it is not particularly limited as long as it is a transparent base material, but it is applicable to securities. It is preferable to have flexibility. Further, the thickness of the transparent base material can be arbitrarily set according to the type of securities.

As the emboss formed on the transparent substrate,
Any pattern can be applied by hot pressing or the like, and one having a complicated pattern is preferable from the viewpoint of forgery prevention. Here, it is more preferable that the embossed pattern reaches a portion other than the window opening portion from the viewpoint of preventing forgery. The embossed surface may be either the back surface or the front surface of the transparent substrate.

The first printing layer is for printing micro characters, pictures, etc. visually recognized through the transparent base material. The printing method is, for example, a conventionally known gravure printing method,
A screen printing method, an offset printing method or the like can be applied.

Here, as the micro character, the character size is set so as to be unreadable due to the shift of the focal length corresponding to the thickness of the transparent substrate, but normally, the character size of 2 to 1 point is set. Size is preferred. Further, the micro character may be a micro symbol, a micro pattern, a micro symbol or a figure having a micro pattern.

As the printing ink, one having good adhesiveness to a transparent substrate is used. Further, from the viewpoint of preventing forgery, a magnetic ink, a metameric pair ink containing the above colorant, and the above inorganic phosphor are used. Special inks such as fluorescent inks containing them may be appropriately used.

The above colorants appear to be the same color under normal light of sunlight, fluorescent lamps, and incandescent lamps, but are visually recognized with different hue, brightness, and saturation under a light source having a predetermined spectral energy distribution. It has a metallic property, for example, Ti-Ni-Co-Li-based green, Co
-Al-Cr system green, Co-Al system blue, Ti-
Co-Al-Li-based blue or the like can be used, and specifically, they are described in JP-A-54-120009 and JP-A-54-
No. 127709, JP-A-54-159004, JP-A-55-510 and the like.

Here, as the light source having a predetermined spectral energy distribution, for example, a filter having a property of passing only a wavelength region of low luminosity having a high spectral reflectance of a corresponding color material (or It is possible to use a filter which cuts off a high wavelength region and which is arranged on the emission surface of a normal white light source.

The wavelength range having high visibility is 450
It means the wavelength range of light in the range of nm to 650 nm.
The wavelength range with low visibility is a wavelength range of light at the boundary between the visible light region and the infrared light region or at the boundary between the visible light region and the ultraviolet light region, and specifically 400 nm to 450 nm and 650 nm to It means the wavelength range of light near 700 nm.

The above-mentioned inorganic phosphor is one whose color tone pattern is changed by irradiation with ultraviolet rays, and when it is contained in the vehicle resin, it is preferably colorless and transparent or white which has the same or similar refractive index as the vehicle resin. Specifically, JP-A-54-13799 and JP-A-54-1
It is disclosed in Japanese Patent No. 3798.

For example, as a material used for this kind of inorganic phosphor, an ultraviolet light emitting phosphor and an infrared light emitting phosphor can be considered. As the ultraviolet light emitting phosphor, it is possible to use a phosphor having an emission spectrum peak in a wavelength range of blue, green, red or the like when excited by ultraviolet light and returning to an energy level lower than this, for example, Ca2 B5 O9Cl
: Eu2 +, CaWO4, ZnO: Zn, Zn2 SiO4
: Mn, Y2 O2 S: Ag, YVO4: Eu, Y2 O3
: Eu, Gd2 O2 S: Tb, La2 O2 S: Tb,
There are Y3 Al5 O12 ,: Ce and the like, and these are used alone or as a mixture of several kinds. The peak of the fluorescence spectrum of the ultraviolet light emitting phosphor is outside the wavelength range of blue, red and green. The weight ratio of the ultraviolet fluorescent substance in the ink may be any as long as the fluorescence can be detected by the light receiving element.

On the other hand, the infrared emitting phosphor has a wavelength λ.
1 has the property of emitting visible light of wavelength λ2 upon receiving the excitation light of 1, and has the property of λ1 = λ2 and λ1> λ2. For example, the composition is YF3: Yb, Er, ZnSC.
uCO or the like. Further, it has a characteristic that it receives the excitation light of wavelength λ1 and emits infrared light of wavelength λ2.
Some have the property of λ2 and λ1 <λ2. For example, the composition is LiNd0.9Yb0.1P4O12, LiBi0.2N.
d0.7 Yb0.1 P4 O12, Nd0.9 Yb0.1 Nd5 (M
oO4) 4, NaNd0.9 Yb0.1 P4 O12, Nd0.8
Yb0.2 Na5 (WO4) 4, Nd0.8 Yb0.1 Na5
(Mo0.5 V0.5 O4) 4, Ce0.05Gd0.05Nd0.75
Yb0.15Na5 (W0.7 Mo0.3 O4) 4, Nd0.9 Y
b0.1Al3 (BO3) 4, Nd0.9 Yb0.1 Na5
(W0.7 Mo0.3 O4) 4, Nd0.9 Yb0.4 P5 O1
4, Nd0.8 Yb0.2 K3 (PO4) 2, etc., all of which receive infrared rays of excitation light (λ1) of 800 nm and emit infrared rays (λ2) having a visible peak of emission spectrum at 980 nm to 1020 nm. It emits light. The weight ratio of the infrared emitting phosphor in the ink may be any as long as the fluorescence can be detected by the light receiving element.

The hiding layer is provided so that the printed contents of the first printing layer and the second printing layer are not transparent to each other, and the hiding ink has good adhesion to the transparent substrate. It is preferable to use a colorant other than the color of the toner of the color copying machine, for example, a color having a white color, a pastel color, a light color or a metallic luster from the viewpoint of copy prevention. The window opening in the concealing layer may have any shape, and preferably has a complicated shape from the viewpoint of preventing forgery. As the printing method, the conventionally known gravure printing method, screen printing method, offset printing method and the like can be applied as described above, and a metal such as tin or aluminum may be deposited by a vacuum deposition method.

The second printing layer is for printing characters, pictures and the like visually recognized on the hiding layer, and the printing ink used has good adhesiveness to the transparent substrate. . As the printing method, the conventionally known gravure printing method, screen printing method, offset printing method and the like can be applied as described above.

[0029]

Therefore, in the invention corresponding to claim 1, the first printing layer, the hiding layer, and the second printing layer are sequentially laminated on one surface of the transparent substrate by taking the above-mentioned means. Since at least a part of the first printed layer shows micro characters, the micro characters are provided between the transparent base material and the hiding layer to prevent the thickness of the transparent base material from being forged by a color copying machine. It is possible to improve the anti-counterfeit property while making the micro-characters unreadable by causing a shift in the focal length by an amount corresponding to that, thereby eliminating the need for a dedicated authenticity determination device.

In the invention according to claim 2, in addition to the function corresponding to claim 1, since the concealing layer corresponding to claim 1 is formed so as to expose at least a part of the transparent substrate, Forgery copying on paper can be prevented by exposing the transparent base material, and thus forgery by a color copying machine can be prevented with a simple configuration.

Further, in the invention corresponding to claim 3, the concealing layer corresponding to claim 1 or claim 2 has a window opening portion for exposing a part of the transparent base material. Alternatively, the same action as the action corresponding to claim 2 can be achieved.

In the invention according to claim 4, the first printing layer is formed on one surface of the transparent substrate, and the concealing layer and the second printing layer are sequentially laminated on the other surface of the transparent substrate. Moreover, since the concealing layer is formed so as to expose at least a part of the transparent substrate, the forgery copy on the paper is prevented by the exposure of the transparent substrate, and thus the forgery by the color copying machine has a simple structure. Can be blocked.

Furthermore, in the invention corresponding to claim 5, since the concealing layer corresponding to claim 4 has a window opening portion for exposing a part of the transparent substrate, the action corresponding to claim 4 is achieved. The same operation as can be achieved.

Further, in the invention according to claim 6, the transparent base material according to claim 2 or claim 3 has an emboss formed on a portion exposed by the concealing layer.
In addition to the effect corresponding to claim 2 or claim 3, since the three-dimensional effect of embossing cannot be reproduced by copying, the forgery prevention property can be further improved.

Furthermore, in the invention according to claim 7, the first printed layer according to any one of claims 1 to 3 and claim 6 has a spectral reflectance in a wavelength range with low visual sensitivity. Since it contains a colorant that changes greatly, in addition to the effect corresponding to any one of claims 1 to 3 and claim 6, a visual inspection using a filter that blocks a wavelength range with high visual sensitivity, Since a red or purple color is visually recognized in the genuine product, the anti-counterfeit property can be further improved.

The invention according to claim 8 is colorless or transparent or white in which the first printing layer according to any one of claims 1 to 3 and 6 causes a change in color tone pattern upon irradiation with ultraviolet rays. Since it contains the inorganic phosphor of
In addition to the action corresponding to any one of claims 1 to 3 and claim 6, by visual inspection using ultraviolet irradiation,
Since the change of the color tone pattern is visually recognized in the genuine product, the forgery preventing property can be further improved.

[0037]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of a forgery-preventing printed material according to the first embodiment of the present invention. This anti-counterfeit printed matter is a transparent base material 1 which is a PET sheet having a thickness of 250 μm, and a first printing layer 2 formed on the transparent base material 1 by an offset printing method using a UV curable offset ink.
And a hiding layer 3 having a thickness of 10 μm formed on the first printed layer 2 by a gravure printing method using a gravure white ink,
A second printing layer 4 formed by an offset printing method using a UV curable offset ink is provided on the hiding layer 3.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to produce a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

In the genuine product, the first printed layer 2 is visually recognized through the transparent substrate 1. On the other hand, in the counterfeit product, the first printing layer 2 is copied onto the substrate. Therefore, the counterfeit product has an appearance that is quite different from that of the genuine product, and it is identified that the counterfeit product is counterfeit.

As described above, according to the first embodiment, the first printing layer 2, the hiding layer 3 and the second printing layer 2 are formed on one side of the transparent substrate 1.
Since the first printing layer 2 is sequentially laminated and the first printing layer 2 is visually recognized through the transparent substrate 1, even if an attempt is made to forge with a color copying machine, the first printing layer of the counterfeit product is on the substrate. Since the external appearance of the genuine product is different from that of the genuine product, it is possible to improve the forgery prevention property while eliminating the need for a dedicated authenticity determination device.

Next, a forgery-preventing printed material according to a second embodiment of the present invention will be described with reference to FIG. 1. However, only different parts will be described here to avoid redundant description. That is, this example has almost the same configuration as the first example, but unlike the first example, the thickness of the transparent substrate 1 is 720 μm, which is about three times thicker, and One point of micro characters is formed on the first print layer 2.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to prepare a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

Since the first printed layer 2 is copied on the base material in the same manner as described above, the counterfeit product has a considerably different appearance from the genuine product, and it can be identified that it is a counterfeit product at a glance. Was done.

Further, the counterfeit product is obviously counterfeit because the micro characters are unreadable because the focal length is displaced by the thickness of the transparent substrate 1 during color copying. Was identified.

As described above, according to the second embodiment, the first printing layer 2, the hiding layer 3 and the second printing layer 2 are formed on one side of the transparent substrate 1.
In this case, in addition to the effect of the first embodiment, the transparent base material 1 and its hiding layer 3 are formed by sequentially laminating the printing layers 4 of FIG. Micro characters are provided between the two, and when forged by a color copying machine, the focal length is shifted by the thickness of the transparent substrate 1 to make the micro characters unreadable, and thus a dedicated authenticity determination device. The anti-counterfeit property can be improved while eliminating the requirement.

Next, a forgery-prevented printed matter according to the third embodiment of the present invention will be described. FIG. 2 is a cross-sectional view showing the structure of the anti-counterfeit printed matter. The same parts as those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted. Only different parts will be described here.

That is, this embodiment has almost the same structure as that of the first embodiment, but unlike the first embodiment, as shown in FIG. Is formed with a window opening 5 for exposing a part thereof.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to produce a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

As described above, since the first printed layer 2 is copied on the base material, the counterfeit product has a significantly different impression from the genuine product, and it can be identified at a glance that it is a counterfeit product. Was done.

In the counterfeit product, since the portion corresponding to the window opening 5 is the background color of the copy paper, the transparent state of the transparent substrate 1 due to the window opening 5 in the genuine product cannot be reproduced, and the counterfeit product is obviously counterfeit. It was identified as being

As described above, according to the third embodiment, since the concealing layer 3 is formed so as to expose at least a part of the transparent base material 1, in addition to the effect of the first embodiment, it is possible to apply the same to the paper. The forgery copy can be prevented by exposing the transparent substrate 1, and thus the forgery by the color copying machine can be prevented with a simple configuration.

Next, a forgery-preventing printed matter according to the fourth embodiment of the present invention will be described. FIG. 3 is a cross-sectional view showing the structure of the anti-counterfeit printed matter. The same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted, and only different parts will be described here.

That is, this embodiment uses the material and printing method applied to the first embodiment, but unlike the first embodiment, as shown in FIG. 3, the concealing layer 3 is used. Is provided on the transparent substrate 1 on a surface different from the first printed layer 2,
Moreover, a window opening 5 for exposing a part of the transparent substrate 1 is formed in the hiding layer 3. The second print layer 4 is formed on the hiding layer 3 as described above.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to prepare a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

In the counterfeit product, the portion corresponding to the window opening 5 becomes the background color of the copy paper, as described above, and therefore the transparent state of the transparent substrate 1 due to the window opening 5 in the genuine product cannot be reproduced, which is obvious. It was identified as being forged.

As described above, according to the fourth embodiment, the first printing layer 2 is formed on one surface of the transparent substrate 1, and the concealing layer 3 and the second printing layer 2 are formed on the other surface of the transparent substrate 1. Since the printing layers 4 are sequentially laminated and the hiding layer 3 is formed so as to expose at least a part of the transparent base material 1, forgery copying on paper is prevented by the exposure of the transparent base material 1. It is possible to prevent counterfeiting by a color copying machine with a simple structure.

Next, an anti-counterfeit printed matter according to the fifth embodiment of the present invention will be described. FIG. 4 is a cross-sectional view showing the structure of the anti-counterfeit printed matter. The same parts as those in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted, and only different parts will be described here.

That is, this embodiment has almost the same structure as that of the first embodiment, but unlike the first embodiment, as shown in FIG. A window opening 5 for exposing a part of the transparent substrate 1 is formed.
2 seconds, embossing by hot-pressing conditions of 5 kgf / cm ² 6
Are processed and formed.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to prepare a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

As described above, since the first printed layer 2 is copied on the base material, the counterfeit product has an appearance that is quite different from that of the genuine product, and can be identified as a counterfeit product at a glance. Was done.

The counterfeit product is the window opening 5 as described above.
Since it is the background color of the copy paper, it was clearly identified as being forged. Further, the counterfeit product could not reproduce the three-dimensional effect of the emboss 6, and it was identified at a glance that it was a counterfeit product.

As described above, according to the fifth embodiment, since the transparent substrate 1 has the emboss 6 formed in the portion exposed by the concealing layer 3, the effect of the first embodiment can be obtained. In addition, since the three-dimensional effect of the emboss 6 cannot be reproduced by copying, the forgery prevention property can be further improved.

Next, a forgery-prevented printed material according to the sixth embodiment of the present invention will be described with reference to FIG. 1. However, only different parts will be described here to avoid redundant description. That is, this example has almost the same configuration as the first example, but unlike the first example, the thickness of the transparent substrate 1 is 720 μm, which is about three times thicker, and In the first print layer 2, a metameric pair ink is used to form one-point micro character.

Specifically, the first printing layer 2 is a UV-curable offset ink obtained by mixing equal amounts of UV-curable offset ink, cobalt blue ink and cadmium yellow ink as an ink for printing. Has been done. Here, the cobalt blue ink and the cadmium yellow ink constitute a metameric pair ink, and the metameric pair ink has a green maximum value in the visible light region as shown in FIG. It has a spectral reflectance higher than that of green in the infrared region having low sensitivity.

Next, such a counterfeit-proof printed matter was copied by a color copying machine to produce a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

As described above, since the first printed layer 2 is copied on the base material, the counterfeit product has a significantly different impression from the genuine product, and it can be identified at a glance that it is a counterfeit product. Was done.

Further, the counterfeit product is clearly counterfeit because the micro characters are unreadable because the focal length is displaced by the thickness of the transparent substrate 1 during color copying. Was identified.

Further, when the genuine product was visually inspected through a filter that cuts off the wavelength region of 640 nm or less, the portion printed with the metallic pair ink shined red and appeared vividly, but the counterfeit product was 640 nm or less. No red light appeared even when visually observed through a filter that cuts off the wavelength region of. That is, when the counterfeit product was visually inspected through the filter, red light did not appear, so that it was clearly identified as a counterfeit product at a glance.

As described above, according to the sixth embodiment, the first printed layer 2 has the maximum value of the spectral reflectance in the wavelength range where the visibility is high and the wavelength range where the visibility is low. Since it contains a colorant having a spectral reflectance higher than the maximum value,
In addition to the effect of the first embodiment, a red or purple color is visually recognized in a genuine product by a visual inspection using a filter that blocks a wavelength range with high visibility, and therefore the anti-counterfeiting property is further improved. You can

Next, a forgery-prevented printed material according to the seventh embodiment of the present invention will be described with reference to FIG. 1. However, only different parts will be described here to avoid redundant description. That is, this example has almost the same configuration as the first example, but unlike the first example, the thickness of the transparent substrate 1 is 720 μm, which is about three times thicker, and Inorganic phosphor ink is used in the first printed layer 2.

Specifically, the first printing layer 2 is printed with UV curable offset ink by the offset printing method as described above, and the inorganic phosphor ink is printed on the UV curable offset ink by the offset printing method. Formed.

Here, the inorganic fluorescent ink is, for example, colorless and transparent, and has a color tone pattern which is changed by irradiation of ultraviolet rays as described above. Next, such a counterfeit-proof printed matter was copied by a color copying machine to create a counterfeit product. After that, the appearance of the genuine product of this example and the appearance of the created counterfeit product were compared and observed.

In the counterfeit product, the inorganic fluorescent ink does not appear,
Since the color tone pattern was different from that of the genuine product, it was identified as a forged product at a glance. Further, in the counterfeit product, the first printing layer 2 is copied on the base material as described above,
The appearance was quite different from the genuine product, and it was identified as a forged product at a glance.

Furthermore, when the genuine product was illuminated by the ultraviolet irradiation lamp, it was visually recognized that the printing pattern of the inorganic fluorescent ink emerged, while the counterfeit product was printed by the ultraviolet irradiation lamp even when the printing pattern was irradiated. The rising of was not visible. That is, the forged product was clearly identified as a forged product at a glance because the printed pattern did not appear when visually observed during irradiation with the ultraviolet irradiation lamp.

As described above, according to the seventh embodiment, the first printing layer 2 contains the colorless and transparent or white inorganic phosphor that causes a change in the color tone pattern upon irradiation with ultraviolet rays. In addition to the effect of the example, since the change of the color tone pattern is visually recognized in the genuine product by the visual inspection using the ultraviolet irradiation, the forgery preventing property can be further improved.

In the second and sixth embodiments, the case where the micro character is provided in the first printing layer 2 has been described, but the present invention is not limited to this, and the micro pattern is formed in the first printing layer 2. Even if a figure having a micro pattern is provided, the same effects can be obtained by implementing the present invention in the same manner.

In the third to fifth embodiments, the case where one window opening portion 5 is formed has been described, but the present invention is not limited to this, and the present invention can be applied to a structure in which a plurality of window opening portions 5 are formed. The same effect can be obtained by carrying out similarly.

In the third to fifth embodiments, the case where the concealing layer 3 is provided with the window-shaped window opening 5 which forms the edge of the exposed portion of the transparent substrate 1 has been described, but the present invention is not limited to this. As shown in the plan views of FIGS. 6A to 6C, even if the edge of the exposed portion is formed by a composite shape of a part of the hiding layer 3 and a part of the transparent base material 1, The invention can be implemented in the same manner and similar effects can be obtained.

In the sixth embodiment, the case of using the metallic pair ink having a high spectral reflectance in the infrared region of 650 nm or more has been described, but the present invention is not limited to this.
Even with a configuration in which a metallic pair ink having a high spectral reflectance in the ultraviolet region of 450 nm or less is used, the present invention can be similarly carried out and the same effect can be obtained.

According to the seventh embodiment, the case where the colorless and transparent inorganic phosphor ink is used has been described. However, the present invention is not limited to this, and the present invention can be applied to a structure using a white inorganic phosphor ink. The same effect can be obtained by carrying out similarly. In addition, the present invention can be modified in various ways without departing from the scope of the invention.

[0081]

As described above, according to the invention of claim 1, the first printing layer, the hiding layer, and the second printing layer are sequentially laminated on one surface of the transparent substrate, and the first printing layer is formed. Since at least a part of the printed layer shows micro characters, micro characters are provided between the transparent base material and its concealing layer, and when forged by a color copying machine, the focal length is equal to the thickness of the transparent base material. Cause the misalignment and make the micro characters unreadable,
Therefore, it is possible to provide a forgery-prevented printed material that can improve the forgery prevention property without requiring a dedicated authenticity determination device.

According to the invention of claim 2, claim 1
Since the hiding layer is formed so as to expose at least a part of the transparent base material, in addition to the effect of claim 1, forgery copying on paper is prevented by the exposure of the transparent base material, and thus with a simple structure. An anti-counterfeit printed matter that can prevent forgery by a color copier can be provided.

Further, according to the invention of claim 3, since the concealing layer of claim 1 or 2 is provided with a window opening portion for exposing a part of the transparent base material, the invention of claim 1 or claim An anti-counterfeit printed matter having the same effect as the effect of item 2 can be provided.

According to the invention of claim 4, the first printing layer is formed on one surface of the transparent substrate, and the concealing layer and the second printing layer are sequentially laminated on the other surface of the transparent substrate. Moreover, since the concealing layer is formed so as to expose at least a part of the transparent substrate, the forgery copy on the paper is prevented by the exposure of the transparent substrate, and thus the forgery by the color copying machine has a simple structure. An anti-counterfeit printed matter that can prevent the above can be provided.

Furthermore, according to the invention of claim 5, since the concealing layer of claim 4 has a window opening portion for exposing a part of the transparent substrate, the same effect as that of claim 4 is obtained. It is possible to provide a forgery-preventing printed matter.

According to the invention of claim 6, claim 2
Alternatively, since the transparent substrate according to claim 3 has an embossed portion formed on the exposed portion of the concealing layer, in addition to the effect according to claim 2 or claim 3, the three-dimensional effect of the embossing cannot be reproduced. Thus, it is possible to provide a forgery-prevented printed material which can further improve the forgery prevention property.

Further, according to the invention of claim 7, the first printed layer according to any one of claims 1 to 3 and claim 6 has a large spectral reflectance change in a wavelength range having low visibility. It contains a colored material that
In addition to the effect according to claim 6, a red or purple color is visually recognized in a genuine product by a visual inspection using a filter that blocks a wavelength range having high visibility, so that the anti-counterfeiting property is further improved. An anti-counterfeit printed matter can be provided.

According to the invention of claim 8, claim 1
The first printed layer according to any one of claims 3 to 6 contains a colorless and transparent or white inorganic phosphor that causes a change in color tone pattern upon irradiation with ultraviolet light. In addition to the effect of item 6, in a genuine product, a change in the color tone pattern can be visually recognized by a visual inspection using ultraviolet irradiation, so that it is possible to provide a forgery-prevented printed material that can further improve the forgery prevention property.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the structure of an anti-counterfeit printed matter according to first, second, sixth and seventh embodiments of the present invention,

FIG. 2 is a sectional view showing the structure of an anti-counterfeit printed material according to a third embodiment of the present invention,

FIG. 3 is a cross-sectional view showing the structure of an anti-counterfeit printed matter according to a fourth embodiment of the present invention,

FIG. 4 is a cross-sectional view showing the structure of an anti-counterfeit printed matter according to a fifth embodiment of the present invention,

FIG. 5 is a characteristic diagram showing a spectral reflectance curve of a metameric pair ink according to a sixth embodiment of the present invention,

FIG. 6 is a plan view showing an appearance of a modified example of the anti-counterfeit printed matter according to the present invention.

[Explanation of symbols]

1 ... Transparent substrate, 2 ... First printing layer, 3 ... Hiding layer, 4 ...
Second printing layer, 5 ... Window opening, 6 ... Embossing.

Claims (8)

[Claims] 1. A transparent substrate having a first printed layer, a hiding layer, and a second printed layer sequentially laminated on one surface thereof, and at least a part of the first printed layer shows micro characters. Anti-counterfeit printed matter characterized by the following. 2. The anti-counterfeit printed matter according to claim 1, wherein the hiding layer is formed so as to expose at least a part of the transparent substrate. 3. The anti-counterfeit printed matter according to claim 1, wherein the concealment layer has a window opening for exposing a part of the transparent base material. . 4. A transparent substrate having a first printed layer formed on one side thereof, and a transparent layer having a second printed layer sequentially laminated on the other side of the transparent substrate. An anti-counterfeit printed material, which is formed so as to expose at least a part of the transparent substrate. 5. The anti-counterfeit printed matter according to claim 4, wherein the hiding layer has a window opening for exposing a part of the transparent substrate. 6. The anti-counterfeit printed matter according to claim 2 or 3, wherein the transparent base material has an emboss formed on a portion exposed by the hiding layer. 7. The anti-counterfeit printed matter according to claim 1, wherein the first print layer has a large spectral reflectance in a wavelength range having low visual sensitivity. Anti-counterfeit printed matter, characterized in that it contains varying colorants. 8. The anti-counterfeit printed matter according to any one of claims 1 to 3 and 6, wherein the first printing layer is colorless and transparent or white in which a color tone pattern is changed by ultraviolet irradiation. An anti-counterfeit printed matter containing the inorganic phosphor of.