JPH09156199A - Anti-forgery printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disable forgery using a copy machine by obtaining a transparent pattern exhibiting gradation through combination of patterns of laminated concealing layer. SOLUTION: A first print layer 3, a concealing layer 4 having a pattern 8 constituted at least partially of nonoverlapping openings 9, a concealing layer 5, and a second print layer 6 are formed sequentially on a core sheet 2. When the concealing layers 4, 5 provided with a pattern of opening are formed in multilayer, a combination pattern 7 of patterns 8 is formed. Since the opening 9 of laminated concealing layers 4, 5 is partially aligned but partially not aligned, coating of the concealing layers 4, 5 is not uniform and thereby the transmittance of light is not uniform. Difference of transmittance causes partial difference of the intensity of transmitted light, i.e., gradation, in the shape of combination pattern, i.e., the transparent pattern of a forged printed matter 1 observed from the external view thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to anti-counterfeit printed matter requiring security measures such as securities, bonds, checks, gift certificates, certificates or cards, and more particularly to a concealing layer laminated on a transparent or semi-transparent substrate. By constructing a gradation watermark pattern caused by the change in the thickness of the
The present invention relates to an anti-counterfeit printed matter that is difficult to be altered.

[0002]

2. Description of the Related Art In recent years, copiers, especially color copiers, have made great strides in terms of functionality, and these copiers (copiers) and color copiers (color copiers) have been used in securities. In many cases, such printed materials are copied and misused, and counterfeiting prevention technology employing copy prevention means utilizing the characteristics of a copying machine has been developed in response to this. For example, this type of forgery prevention means uses a colorant ink having a sharp peak in a spectral reflection curve and prints the resulting image to reproduce a different color tone by color copying. By changing a part of the line to a direction that does not overlap the scanning direction due to the scanning of the copier, an image is formed in which only lines of different lines appear floating at the time of copying, and the image is a combination of halftone dots and lines If provided,
In some cases, the difference between the halftone dot and the line is emphasized and reproduced by copying, and the authenticity can be easily determined.
In addition, micro-characters are provided below the resolution of the copier, and the micro-characters are crushed during copying, making it difficult to reproduce completely. Because the part is not reproduced, by detecting the presence of this magnetic component,
By providing an image made of ink capable of performing the true / false determination and an ink that causes a change in observed color (color shift) in accordance with the visual angle of the printed matter, reproduction in a copied matter is not possible. By providing an image made of black ink that has no absorption in the infrared region, it is possible to determine the authenticity of the copy by detecting the presence or absence of infrared absorption in the black part of the copy. Etc.
In characters, images, designs, etc. using special inks,
In some cases, authenticity is determined based on the presence or absence of these detections.

However, it is assumed that the improvement of the resolution due to the progress of the copying machine and the color copying machine has enabled the reproduction of images and colors which has been conventionally difficult, and the effect of the above-described forgery prevention technology is being lost. There's a problem. In addition, when using a magnetic ink, which is a special ink, there is a drawback that the authenticity cannot be determined unless a measuring means having a magnetic head and a magnetic sensor is used. It is important that there is a clear difference that is easier to judge, and it is desired to provide such a judging means.

[0004] Therefore, in a fake print in which a transparent substrate is partially exposed to form a specific transparent pattern, a transparent portion cannot be reproduced by a copying machine or a color copying machine.
Forgery can be difficult, but there is a problem in that the exposed portion is on the surface, which limits the design.
Further, while it is difficult to make a copy using a copying machine, there is a "watermark" as a reliable identifiable means, but it is difficult to use it for cards such as credit cards, cash cards, ID cards, and the like. Incidentally, a structure in which a watermark structure is provided in a card as similar to "watermark" is described in Japanese Patent Application Laid-Open No. 58-217393 by the present applicant, and is set arbitrarily on both sides of an opaque core sheet. In a card that is made by laminating transparent oversheets with perforated patterns and heat-sealing by heating and pressing, the perforated portion of the transparent oversheet is filled with a part of the core sheet, so that the light transmittance is lower than the surrounding area. , It can be seen as a black watermark by transmitted light, and it becomes possible to prevent forgery and to easily detect illegal acts at the time of using the forgery.

[0005]

However, the above-described watermark-like structure can be used for cards such as credit cards, cash cards, ID cards, etc., which are made of thermoplastic resin as a base material. In order to cope with fraudulent acts such as counterfeiting of increasingly sophisticated printed materials, especially with the use of copiers, it is difficult to use them for media, and more sophisticated duplication prevention technology is required. I have. In view of the above, the present invention provides a gradation watermarked pattern from a combination of patterns formed by stacking a concealing layer, which is formed by forming a pattern having openings that do not partially overlap each other on a light-transmissive base material, thereby obtaining a copy. It is an object to provide a forgery-prevented printed matter that cannot be forged by a machine.

[0006]

The present invention, which has been made to achieve the above object, is an anti-counterfeit printed matter comprising a laminate capable of transmitting light, the invention being described in claim 1. A forgery-preventing printed matter, characterized by comprising two or more concealing layers having a pattern formed of openings that do not at least partially overlap with each other, and having a watermark pattern exhibiting gradation by a combination of patterns. is there.

According to a second aspect of the present invention, the light-transmitting substrate has two or more concealing layers having a pattern formed by the first printing layer and the openings that do not at least partially overlap each other. And a second printing layer, and has a watermark pattern that exhibits gradation by a combination of the patterns, and is a forgery-preventing printed matter.

According to a third aspect of the present invention, a concealing layer and a printing layer are laminated on both surfaces of a light-transmissive substrate, and the concealing layer is composed of openings that do not at least partially overlap each other. An anti-counterfeit printed matter, which has a watermark pattern that exhibits gradation by combining the patterns.

The invention described in claim 4 is the first to third aspects of the present invention.
In any of the anti-counterfeit printed matter, the light transmittance of the hiding layer is different from each other.

According to a fifth aspect of the invention, a semi-transparent substrate is provided with a concealing layer having a pattern constituted by openings and a first printing layer on one surface, and a second printing layer on the other surface. The anti-counterfeit printed matter is characterized by being provided.

The invention described in claim 6 is the same as in claim 1,
The anti-counterfeit printed matter according to any one of items 3 and 5, wherein information including micro characters is formed on a part of the print layer.

[0012] The invention according to claim 7 is the invention according to claims 1, 2,
The anti-counterfeit printed matter according to any one of items 3 and 5, wherein the printed layer contains a colored colorant having a large spectral reflectance change in a wavelength range having low visibility.

The invention described in claim 8 is based on claim 1,
The anti-counterfeit printed matter according to any one of items 3 and 5, wherein the printed layer contains an inorganic phosphor whose color tone is changed by irradiation with ultraviolet rays.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 1 is a plan view of the anti-counterfeit printed matter according to the first configuration of the present invention, FIG. 2 is a sectional view of the anti-counterfeit printed matter according to the first invention taken along line XX of FIG.
FIG. 4 is a cross-sectional view illustrating a laminate having a watermark pattern exhibiting gradation by a combination of patterns according to the present invention, FIG. 4 is a cross-sectional view of an anti-counterfeit printed matter having the second configuration, and FIG. 5 is a third configuration. FIG. 6 is a cross-sectional view of the anti-counterfeit print, and FIG. 6 is a spectral characteristic curve of the metallic pair ink described in Example 5 used in the masking layer of the anti-counterfeit print.

FIG. 3 shows a watermark pattern which exhibits gradation from a combination of patterns formed by stacking a concealing layer formed by forming a pattern having openings which do not partially overlap each other on the light-transmittable substrate of the present invention. It is a light-transmittable laminated body A, which is capable of transmitting at least a part of the irradiated light, and the opening portions of the laminated body A in which at least a part of the laminated body A do not overlap with each other when viewed through. The “watermark pattern” shown by the combination pattern 7 consisting of the concealing layers 4, 5 having the pattern 8 constituted by 9 is observed. If this is copied by a copying machine, the "watermark pattern" cannot be reproduced, and thus, the copying becomes virtually impossible. And the design with "watermark pattern" is the laminated body A
In addition to being held by the above, a design such as a picture or pattern by printing or the like can be laminated on the laminated body, and the "watermark pattern" and the design such as the picture or pattern can be formed together. That is, the laminated body A is a main component of the anti-counterfeit printed matter. The configuration as a specific example is shown in FIG.
In the anti-counterfeit printed matter 1 of the first configuration of the present invention shown in FIG. 1, the first printed layer 3 is provided on the core sheet 2, and the concealing layer 4 having the pattern 8 formed by the openings 9 at least partially not overlapping each other. The hiding layer 5 and the second printing layer 6 are sequentially laminated. That is, as shown in FIG. 1, in the anti-counterfeit printed matter 1, a watermarked pattern 10 having a gradation, which is shown by a combination pattern 7 (a gradation is a portion shaded by a star mark in the drawing) which is a combination of these patterns. Are formed. Further, although not shown, a printing layer representing a design such as a pattern or a pattern may be provided between the hiding layer on the base material (core sheet) and on either the hiding layer.

By forming the concealing layer provided with the pattern of the openings 9 into multiple layers, a combination pattern 7 composed of a combination of the patterns 8 is formed, so that the openings 9 of the laminated concealing layers are formed. By forming a matching portion and a non-matching portion, the overlapped pattern includes a portion completely covered with the hiding layer, a portion covered with one hiding layer, and a portion where the opening 9 of the laminated hiding layer overlaps. Three parts are formed, resulting in parts with different degrees of coverage by the hiding layer, which leads to differences in light transmission. Due to this difference in light transmittance, the intensity of partially transmitted light, that is, gradation appears in the shape of the combination pattern 7 as a watermark pattern observed from the appearance of the anti-counterfeit printed material 1. This combination pattern is determined by the pattern 8 of the concealing layer to be laminated, that is, the shape of the opening 9, and the gradation position and state of the combination pattern 7 can be arbitrarily set by the shape of the opening 9. Furthermore, when the concealing layer is formed in multiple layers, the light transmittance or / and the thickness of each layer may be different. Although not shown, the hiding layer having a pattern composed of openings that do not at least partially overlap each other may be three or more layers, but each hiding layer has a combination pattern 7 from the appearance when laminated. It is desirable that the configuration is such that the degree of light transmission that can be confirmed is shown, and the state of gradation can be clearly discriminated.

The combination pattern 7 is arbitrarily determined and is not particularly limited to a normally designed picture, pattern, mark, image or the like. Further, the pattern 8 formed of the opening 9 of each concealing layer that constitutes the combination pattern 7 is arbitrarily determined, and similarly, the gradation formed in the combination pattern 7 can also be arbitrarily set according to the shape of the pattern of each concealing layer. it can. Therefore, even if the combination pattern 7 has the same shape, different watermark patterns can be formed by changing the position and state of the gradation formed.

The core sheet 2 is a light-transmissive base material and is not particularly limited as long as it has a light transmissive property such as a transparent or semitransparent base material, but the light transmissivity by itself is 20% or more. If the conditions are satisfied, it can be used even if it is translucent. The material is, for example, polyethylene terephthalate (PE
Examples of the resin include T) resins, polyvinyl chloride resins, polyester resins, polycarbonate resins, polymethacrylic acid resins, polystyrene resins, and other synthetic resins, glass, and the like, which are appropriately determined depending on the application. In particular, the present invention needs to have flexibility when used for securities, but the thickness can be arbitrarily set according to the type of securities.
In addition, it is necessary that the light transmittance is extremely deteriorated due to the formation of the concealing layer, and that the watermark cannot be confirmed. In a room under illumination of about 500 lux, it is necessary to be able to check the watermark through the base material toward the light of an artificial lamp such as a fluorescent lamp or an incandescent lamp. The color of the semitransparent substrate is not particularly limited as long as it satisfies the above conditions, but securities include white, pastel color,
It can be said that light colors (light colors based on red, yellow, blue, green, etc.) are preferable in terms of design.

As described above, the concealing layer is such that the anti-counterfeit printed matter of the present invention can transmit natural light such as sunlight or the light of artificial lamps such as fluorescent lamps and incandescent lamps, that is, anti-counterfeit printed matter 1. It suffices that the watermark pattern that can be observed from the appearance appears, and in particular, the details can be displayed in a gradation shape. The hiding layer is usually composed of ink, for example, a mixture of acrylic, polyester, polyurethane, or epoxy resin with a pigment or dye such as titanium oxide, magnesium oxide, or barium sulfate. In particular, it is possible to use a transparent or semi-transparent base material having a good adhesiveness to the core sheet which is a light-transmittable base material having a light-transmitting property. It is preferable that the color is not present in each toner of the color copying machine or the color is difficult to reproduce, and for example, white, pastel color, and metallic luster are preferable. The use of such a color makes it difficult to copy a portion of the forgery-preventive printed matter of the present invention that is visible in appearance from between the printed pictures of the printed layer. The method for forming the hiding layer includes conventionally known gravure printing methods, screen printing methods, printing methods such as offset printing methods, microgravure coaters, gravure coaters, bar coaters, coating methods such as roll coaters, and the like. It can be selected as appropriate. The opening 9 of the hiding layer formed as described above is provided so as to form the combination pattern 7 formed as a watermark, and the combination pattern 7 has a complicated shape from the viewpoint of preventing forgery. Is desirable.

The first printed layer 3 is printed with micro-characters, pictures, letters, numbers and the like which are visible from the side of the core sheet 2, and is formed with written information and design of anti-counterfeit printed matter. is there. In particular, micro characters are set so that when viewed from the side of the core sheet 2, the size of the characters causes the focal length of the scanner of the copying machine to deviate from the thickness of the core sheet, making it difficult to read. , 2
A character size of 1 point is preferred. The micro characters may be micro symbols, micro patterns, or a combination thereof instead of the micro characters. In this printing layer, as a normal ink, for example, FD OL TC process ink (trade name) manufactured by Toyo Ink Mfg. Co., Ltd., FD
Carton P process ink (trade name) manufactured by Toyo Ink Mfg. Co., Ltd., TK mark V process ink (trade name) manufactured by Toyo Ink Mfg. Co., Ltd., etc., and especially a core sheet having a light-transmitting property such as a transparent or semitransparent substrate. It is possible to use a material having good adhesiveness with, and as another anti-counterfeiting means, a special ink such as a magnetic ink or a metameric pair ink containing the following colorants, a fluorescent ink containing an inorganic phosphor, etc. It is also possible to include at least one type. By detecting and detecting the printing layer using such a special ink, the presence or absence of forgery or falsification can be confirmed. In addition, mechanization of the verification means becomes possible. Thereby, the decorativeness and the forgery prevention can be further improved. The method of forming the printing layer can be appropriately selected according to the use of the forgery-prevention printed matter by using a conventionally known printing method such as a gravure printing method, a screen printing method, and an offset printing method.

The magnetic material used for the magnetic ink is, for example, Fe, Ni, Mn, Zn, Co, permalloy, sendust, Mn-Zn ferrite, Ni-Zn ferrite,
A simple metal such as Mn ferrite, Zn ferrite, FeS, magnetite, γ-iron oxide, Co-coated γ-iron oxide, barium ferrite, strontium ferrite, or chromium dioxide, or an alloy thereof, or a metal compound can be used.

The magnetic sensor can reproduce the information formed in the printing layer by adding and mixing these into the printing ink, and has the effect of preventing forgery, such as facilitating the discovery of forgery by verifying the presence or absence thereof, Furthermore, information can be written by forming a print layer capable of magnetic recording.

The printed layer formed by the above-mentioned metameric pair ink is composed of Ti, Ni, Co, Li, Al and C.
A specific pattern or the like is formed by using two or more kinds of metallic colorants such as r, and the pattern is exposed by irradiating the pattern with predetermined normal light and light having a spectral energy distribution. Whether or not it is true or false is determined by the presence or absence. That is, as a colorant contained in the above-described metameric pair ink, under normal light such as sunlight, a fluorescent lamp, and an incandescent lamp, the color appears to be the same, but under a light source having a predetermined spectral energy distribution, a different hue. , Lightness, and saturation, which are visually recognized. Specifically, JP-A-54-120009, JP-A-54-127709, and JP-A-54-1590.
No. 004 and JP-A-55-510. As a colorant, Ti-Ni-Co-Li-based green, Co-Al-Cr-based green, Co-Al-based blue, Ti-Co-Al-Li-based blue, or the like can be used.

Here, the light source having a predetermined spectral energy distribution is, for example, a white light source having a filter (or a luminosity factor) having a property of transmitting only a wavelength region having a low luminosity factor having a high spectral reflectance in the corresponding color material. A filter for cutting off a high wavelength region) can be used, and the irradiation wavelength can be arbitrarily selected. The wavelength range where the visibility is low is the wavelength range between the visible light region and the infrared light region or the boundary between the visible light region and the ultraviolet light region.
The wavelength range of 50 nm, around 650-700 nm, and the wavelength range with high visibility are the wavelength range of 450-650 nm.

Further, in the fluorescent ink containing the inorganic fluorescent substance, the mixed inorganic fluorescent substance emits fluorescent light by irradiation of ultraviolet rays to change the color tone pattern of the printing ink. Other ink compositions and the like are the same as the conventional ink. is there. When the inorganic phosphor is contained in the vehicle resin, the refractive index is the same or similar to that of the vehicle resin, and it is preferably colorless and transparent or white. Specifically, Japanese Patent Application Laid-Open No. 54-13799
And JP-A-54-13798. By forming a printing layer with the fluorescent ink containing the inorganic phosphor, the presence or absence of the printing layer can be verified by irradiation with a black lamp or the like, and the verification unit can be mechanized. Thereby, forgery prevention can be further improved.

The material used for this inorganic phosphor is an ultraviolet light emitting phosphor or an infrared light emitting phosphor, which is added and mixed in the printing ink. First, the ultraviolet light-emitting phosphor is excited by ultraviolet light, and the peak of the spectrum emitted when returning to an energy level lower than that is in the wavelength region of blue, green, red, etc., for example, Ca ₂ B ₅ O ₉ Cl. : Eu ²⁺ , C
aWO ₄ , ZnO: Zn ₂ SiO ₄ : Mn, Y ₂ O
₂ S: Eu, ZnS: Ag, YVO ₄ : Eu, Y
₂ O ₃ : Eu, Gd ₂ O ₂ S: Tb, La ₂ O ₂ S: T
b, Y ₃ Al ₅ O ₁₂ : Ce, etc., which are used alone or as a mixture of several kinds selected from these. The fluorescence spectrum has peaks outside the blue, red, and green wavelength ranges.
It is desirable that the amount of the ultraviolet light emitting phosphor added to the ink is such that the fluorescence of the light receiving element of the detector can be detected.

The infrared emitting phosphor has a wavelength λ₁Excitation light
The wavelength λ_TwoExhibiting the characteristic of emitting visible light of λ
₁= Λ_TwoAnd λ₁> Λ_TwoHaving the property
The composition is, for example, YF_Three: Yb, Er, ZnS: Cu
Co and the like. Also, λ₁≠ λ_TwoAnd λ₁<Λ_TwoGender
As having the quality, the composition is, for example, LiNd
_0.9Yb_0.1P_FourO₁₂, LiBi_0.2Nd_0.7Yb_0.1
P_FourO₁₂, Nd_0.9Yb _0.1Nd_Five(MoO_Four)_Four, N
aNd_0.9Yb_0.1P_FourO₁₂, Nd_0.8Yb_0.2Na_Five
(WO_Four)_Four, Nd_0.8Yb_0.2Na_Five(Mo_0.5WO
_0.5)_Four, Ce_{0. 05}Gd_0.05Nd_0.75Yb_0.25Na
_Five(W_0.7Mo_0.3O_Four)_Four, Nd_0.9Yb_{0. 1}Al_Three
(BO_Three)_Four, Nd_0.9Yb_0.1Al_2.7Cr_0.3(B
O_Three)_Four, Nd _0.6Yb_0.4P_FiveO₁₄, Nd_0.8Yb
_0.2K_Three(PO_Four)_TwoAnd excitation light
(Λ₁) Receiving 800nm infrared light, 980nm ~ 10
Infrared light with a pronounced peak in the emission spectrum at 20 nm
(Λ_Two) To emit light. Infrared emission in ink
The amount of phosphor added can detect the fluorescence of the light receiving element of the detector
It is desirable that

According to these, since the printing layer emits light when irradiated with a black lamp or the like when verifying the anti-counterfeit printed matter, the presence thereof can be easily discriminated. Furthermore, by making the fluorescent ink transparent, normally, Although it is not visible, the printed layer emits light when illuminated by a black lamp, etc., only during authentication, so it can be used for hidden characters.
It makes forgery falsification more difficult and has the effect of preventing it.

The second printing layer 6 is formed by printing visual information related to the anti-counterfeit printed matter on the concealing layer and can be provided in the same manner as the first printing layer 3. Although not shown, a protective layer may be provided on the outermost layer of the anti-counterfeit printed matter 1 for the purpose of protecting it from scratches and stains.

Next, although not shown in FIG. 3, it is a cross-sectional view of the anti-counterfeit printed matter 11 according to the second invention having a combination pattern (not shown) in which a watermark pattern having gradation is formed as in FIG. The first concealing layer 13, the second concealing layer 14, on both sides of the sheet 12, respectively,
A first printed layer 15 and a second printed layer 16 are provided. The first concealing layer 13 and the second concealing layer 14 are combined patterns 1 by the pattern 18 including the openings 19.
7 is formed, and by forming a part that does not match the opening 19 of the concealing layer laminated with the core sheet 12 sandwiched therebetween, the overlapping pattern is a part that is completely covered by the concealing layer, Three parts, a part covered with one hiding layer and a part with the openings 19 of the laminated hiding layers overlapping, are formed, and parts with different degrees of covering with the hiding layer are formed. There is a difference. The combination pattern 17 as a watermark pattern observed from the appearance of the anti-counterfeit printed matter 11 due to the difference in light transmittance.
In the shape of, the intensity of partially transmitted light, that is, a gradation appears. This combination pattern is determined by the shape of the masking layer pattern 18 to be laminated, that is, the shape of the opening 19, and the gradation position and state of the combination pattern 17 can be arbitrarily set by the shape of the opening. Although not shown, it is also possible to provide two or more concealing layers each having a pattern composed of non-overlapping openings like the anti-counterfeit printed matter 1 shown in FIG. 2 on the core sheet 12. It is desirable that the layers have such a structure that the layers have a light transmittance that allows the presence of the combination pattern 17 to be confirmed when laminated, and that the state of gradation can be clearly discriminated. When the concealing layer is formed in multiple layers as described above, the light transmittance and / or the thickness of each layer may be different.

The combination pattern 17 is arbitrarily determined and is not particularly limited to a normally designed pattern, pattern, mark, image or the like. Further, the opening 19 of each concealing layer that constitutes the combination pattern 17 is formed.
The pattern 18 consisting of is arbitrarily determined, and similarly, the gradation formed in the combination pattern 17 can also be arbitrarily set depending on the shape of the pattern of each hiding layer. Therefore, even if the combination pattern 17 has the same shape, different watermark patterns can be obtained by changing the position and state of the gradation formed. In addition,
The constituent material and the forming method are the same as those of the forgery-preventing printed material 1 of the first configuration shown in FIG. 2 above, and the constituent materials of the first printing layer and the second printing layer, and the magnetic material as other anti-counterfeiting means. Since special inks such as inks, metameric pair inks containing the following colorants, and fluorescent inks containing an inorganic phosphor are also the same as those in the forgery-preventing printed material 1, they are omitted here.

Further, although not shown in FIG. 3, a cross-sectional view of the anti-counterfeit printed matter 21 according to the third invention as shown in FIG. 3 has a combination pattern (not shown) in which a watermark pattern having gradation is formed as in FIG. Thus, the concealing layer 23 and the first printing layer 24 are provided on one surface of the core sheet 22 made of a semitransparent base material, and the second printing layer 25 is provided on the other surface thereof. In the third invention, since the core sheet 22 is made of a semitransparent base material, it has a light transmittance that allows light to be seen through the appearance and has a function as a hiding layer. Therefore, the hiding layer 23 is only one layer. The masking layer 23 has a pattern 27 formed by the openings 28. A watermark pattern is formed from the pattern 27 formed by the openings 28 of the core sheet 22 and the concealing layer 23. Further, the hiding layer 23 needs to have such a light transmittance that the first printing layer 24 and the second printing layer 25 together with the core sheet 22 do not pass through each other. The pattern 27 is arbitrarily determined and is not particularly limited to a normally designed pattern, pattern, mark, image or the like. The constituent material and the forming method are the same as those of the forgery-preventing printed material 1 having the above-mentioned first configuration, and the constituent materials of the first printing layer and the second printing layer, and the magnetic ink as another forgery preventing means, Alternatively, a special ink such as a metameric pair ink containing the following colorant or a fluorescent ink containing an inorganic phosphor is also used as the anti-counterfeit printed matter 1 described above.
Since it is similar to the above, it is omitted here.

The anti-counterfeit printed matter disclosed in the first configuration and the second configuration is one in which the concealing layer is laminated so that at least a part of the pattern formed by the openings does not overlap, and the anti-counterfeit printed matter. Since the amount of light transmitted through the part of the transparent part varies depending on the presence of the opening, a watermark pattern is formed.Furthermore, it is possible to form a gradation in the watermark pattern depending on the presence or absence of overlapping openings of each hiding layer. , This gradation is the pattern of each hiding layer,
That is, it can be arbitrarily formed depending on the degree to which the openings are provided.

In the anti-counterfeit printed matter disclosed in the third structure, the watermark pattern is formed by the combination of the semi-transparent base material and the pattern of the openings provided in the concealing layer, and a plurality of concealing layers are not provided. Since the amount of light transmission is controlled by the semitransparent base material and the masking layer, a watermark pattern different from the conventional one can be obtained.

In the anti-counterfeit printed matter of the first to third configurations, the printed layer having the micro characters between the concealing layer and the light transmissive substrate faces from the light transmissible substrate side. Although visible, the difference between the character size and the focal length corresponding to the thickness of the light-transmittable substrate makes the micro-characters copied by the copying machine unreadable.

Further, a magnetic material is added and mixed into the printing ink, the information formed on the printed layer is reproduced by a magnetic sensor, and the presence or absence of the information is verified to facilitate the discovery of forgery. . In addition, a specific pattern or the like is formed on a printing layer containing a colored colorant whose spectral reflectance greatly changes in a wavelength range with low luminosity, that is, a metallic layer containing two or more kinds of colorants in the printing layer. It is possible to determine the authenticity by irradiating a predetermined normal light and light having a spectral energy distribution to expose a pattern, and the presence / absence of this pattern. Further, by forming a printing layer with a fluorescent ink containing an inorganic phosphor, the presence or absence thereof can be verified by irradiating a black lamp or the like,
Mechanization of verification means becomes possible. Thereby, forgery prevention can be further improved.

[0038]

EXAMPLES The present invention will be described in detail with reference to specific examples. (Embodiment 1) As shown in FIG. 2, a polyethylene terephthalate (PET) having a thickness of 250 μm which becomes a core sheet 2.
Ultraviolet (UV) curable offset ink (yellow, crimson, and red, on a transparent substrate made of resin (T-60 Toray)
A first printing layer 3 (thickness: 2 μm) representing a picture is formed on the front surface or the back surface by an offset printing method using indigo, black), and a gravure is printed on the first printing layer 3 using a white ink for gravure printing. A first concealing layer 4 having a thickness of 4 μm so as to have a pattern 8 having a predetermined opening 9 by a printing method;
Further, the same white ink for gravure printing was used to form a second concealing layer 5 having a thickness of 6 μm by the gravure printing method so as to have a pattern 8 consisting of predetermined openings 9, and further on the second concealing layer 5. A second printed layer 6 (2 μm thick) was formed using the same ultraviolet (UV) curable offset ink to prepare a counterfeit-proof printed matter 1. As a predetermined combination pattern 7 formed by combining the openings of the first hiding layer 4 and the second hiding layer 5, for example, the pattern of the watermark pattern 10 shown in FIG. 1, the first hiding layer 4 is formed. The openings 9 that represent the respective patterns 8 of the second concealing layer 5 are arranged so that at least some of them do not overlap each other. ○ Composition of ultraviolet (UV) curable offset ink Pigment (each color of yellow, red, indigo, and black: blending amount is set for each color) 10 to 20 parts by weight Acrylic ester oligomer 55 parts by weight Photoinitiator 10 parts by weight Others Additive 25 parts by weight Composition of white ink for gravure printing White pigment (titanium oxide) 20 parts by weight Polyurethane resin 70 parts by weight Hardener 3 parts by weight Other additives 7 parts by weight

The forgery-preventing printed material 1 has a watermark pattern because the amount of light passing through the anti-counterfeit printed matter 1 is partially different depending on the opening 9, and further, the first hiding layer 4 and the second hiding layer 5 are formed.
Presence or absence of overlapping openings, that is, the overlapping combination pattern 7 in the present embodiment, the portion completely covered with the hiding layer, the portion covered with one hiding layer, and the opening 9 of the laminated hiding layer overlap. Since three parts, which are the open part and the open part, are formed, parts having different degrees of coverage by the concealing layer are formed, and it is possible to give gradation to the watermark pattern due to the difference in light transmittance. In the anti-counterfeit printed matter 1, the openings 9 of the first hiding layer 4 and the second hiding layer 5 are formed.
A watermark pattern composed of the combination pattern 7 due to the overlapping of the two was visually recognized, and in particular, gradation was confirmed in a part of the watermark pattern.

The anti-counterfeit printed matter 1 prepared above was copied using a commercially available color copying machine (Acolor 935, manufactured by Fuji Xerox Co., Ltd., copying condition: normal mode), and the appearances of the genuine product and the reproduced product were compared and examined. . The appearance of this duplicate was reproduced with high accuracy, but when the light was transmitted therethrough, the watermark pattern seen in the genuine product was not reproduced, and of course it was formed on a part of the watermark pattern. Since there was no gradation, it was extremely easy to distinguish the genuine product from the duplicate product.

(Embodiment 2) Anti-counterfeit printed matter 1 shown in FIG.
No. 1 was predetermined by a gravure printing method using a white ink for gravure printing similar to that of Example 1 on one surface of a transparent base material made of a polyethylene terephthalate (PET) resin having a thickness of 250 μm to be the core sheet 12. The first (4 μm thick) so as to have the pattern 18 consisting of the openings 19
Of the hiding layer 14 of Example 1 is formed on the first hiding layer 14.
A first printing layer 13 (2 μm thick) representing a pattern is formed on the front surface or the back surface by an offset printing method using an ultraviolet (UV) curable offset ink similar to the above, and the same gravure is formed on the other surface of the core sheet 12. A second concealing layer 15 having a pattern 18 having a predetermined opening 19 (thickness of 6 μm) is formed by a gravure printing method using a white ink for printing, and the same is formed on the second concealing layer 15. The second printing layer 6 (2 μm thick) was formed and manufactured using the ultraviolet (UV) curable offset ink of. The anti-counterfeit printed matter 11 includes the first hiding layer 1 with the core sheet 12 interposed therebetween.
4 and the second concealing layer 15 have a predetermined combination pattern 17 formed by combining the openings 19, for example, FIG.
Like the watermark pattern 10 shown in FIG. 3, the openings 19 representing the respective patterns of the first concealing layer 14 and the second concealing layer 15 are arranged so that at least some of them do not overlap each other.

The anti-counterfeit printed matter 11 has a watermark pattern because the amount of transmitted light partially differs depending on the opening of the concealing layer which is laminated with the core sheet 12 sandwiched therebetween, so that the first concealing layer is formed. Whether or not 14 and the opening 19 of the second concealing layer 15 overlap, that is, the overlapping combination pattern 17 in this embodiment is laminated with a portion completely covered with the concealing layer and a portion covered with one concealing layer. Since three portions, that is, a portion where the opening 19 of the concealing layer overlaps, are formed, a portion having a different degree of covering by the concealing layer is formed, and a gradation can be given to the watermark pattern due to the difference in light transmittance. It will be possible. In the anti-counterfeit printed matter 11, a watermark pattern composed of the combination pattern 17 due to the overlapping of the openings 19 of the first hiding layer 14 and the second hiding layer 15 was visually recognized, and in particular, gradation was confirmed in part of the watermark pattern. .

The anti-counterfeit printed matter 11 prepared above was copied using a commercially available color copying machine (Acolor 935, manufactured by Fuji Xerox Co., Ltd., copying condition: normal mode), and the appearances of a genuine product and a reproduced product were compared and examined. . The appearance of this duplicate was reproduced with high accuracy, but when the light was transmitted therethrough, the watermark pattern seen in the genuine product was not reproduced, and of course it was formed on a part of the watermark pattern. Since there was no gradation, it was extremely easy to distinguish the genuine product from the duplicate product.

(Embodiment 3) Anti-counterfeit printed matter 2 shown in FIG.
1 is a polyethylene terephthalate (PET) resin with a thickness of 250 μm (light transmittance: 80
%) So as to have a pattern 27 having a predetermined opening portion 28 on one surface of the semitransparent substrate (6 μm thick) by the gravure printing method using the same white ink for gravure printing as in Example 1. The concealing layer 24 is formed, and the first printing layer 23 (2 μm thick) representing a pattern is formed on the front surface or the back surface by the offset printing method using the same ultraviolet (UV) curable offset ink as in Example 1, A second printing layer 6 (thickness of 2 μm) was formed on the other surface of the core sheet 22 using the same ultraviolet (UV) curable offset ink. The anti-counterfeit printed matter 21 has a predetermined pattern formed by the openings 28 of the hiding layer 24 on the semitransparent base material of the core sheet 12, for example, the first hiding layer 24 like the watermark pattern shown in FIG. And the second hiding layer 2
The openings 28 representing the respective patterns 5 are arranged so that at least some of them do not overlap each other.

Since a watermark pattern is formed by a combination of the semitransparent base material which is the core sheet 22 and the pattern formed by the openings 28 provided in the masking layer 24, it is necessary to provide a plurality of masking layers on the anti-counterfeit printed matter. However, since the amount of transmitted light is controlled by the semitransparent base material and the masking layer, the watermark pattern is different from the conventional one.

The anti-counterfeit printed matter 11 prepared above was copied using a commercially available color copying machine (Acolor 935, manufactured by Fuji Xerox Co., Ltd., copying condition: normal mode), and the appearances of the genuine product and the reproduced product were compared and examined. . The appearance of this duplicate was reproduced with high precision, but when the light was transmitted therethrough, the watermark pattern seen in the genuine product was not reproduced, and in particular the subtle watermark pattern was reproduced at all. Therefore, it was extremely easy to distinguish the genuine product from the duplicate product.

(Embodiment 4) Anti-counterfeit printed matter 1 of Embodiment 1
The same as Example 1 except that the thickness of the transparent base material that is the core sheet 2 is set to 720 μm and one point (about 0.25 mm / square) of micro characters is formed on at least a part of the first printing layer 3. Then, an anti-counterfeit printed matter was produced. The above-mentioned anti-counterfeit printed matter prepared above is sold on a commercial color copying machine (Aco
Lor935, manufactured by Fuji Xerox Co., Ltd., copying conditions: normal mode) were used to perform copying from the transparent substrate side, and the appearances of the genuine product and the duplicated product were compared and examined. The appearance of this duplicate was reproduced with high accuracy, but when the light was transmitted, the watermark pattern seen in the genuine product was not reproduced, and the focal length due to the thickness of the transparent substrate Because of the misalignment, micro characters could not be copied precisely, making it difficult to read, and it was extremely easy to distinguish between genuine products and duplicate products.

(Example 5) Anti-counterfeit printed matter 1 of Example 1
The thickness of the transparent base material which is the core sheet 2 of 720 μm is used, and at least a part of the first printing layer 3 is mixed with the following compositions containing the metameric pair ink in equal amounts. An anti-counterfeit printed matter was produced in the same manner as in Example 1 except that it was formed by the offset printing method. ○ Ink composition for printing Ultraviolet ray (UV) curable offset ink 85 parts by weight (Product name: FDS Medium TC Ro O Toyo Ink Co., Ltd.) Cobalt blue ink (Co-Al pigment) 15 parts by weight Cadmium yellow ink 100 parts by weight (Product name: FDOL Yellow TC Ro Toyo Ink Co., Ltd.)

A metallic pair ink is composed of the cobalt blue ink and the cadmium yellow ink in the above printing ink composition, and has a green maximum value (about 500 nm) in the visible light region as shown in FIG. , And 650n
It has a higher spectral reflectance than green in the infrared light region with low visibility of m or more. According to this, when visually observed through a filter that blocks a wavelength range of 640 nm or less, red or violet light appears from a printed portion including the metameric pair ink, and appears red, but a portion not including the metameric pair ink. Alternatively, in printing that does not include the metameric pair ink, red or purple light does not appear even when viewed through the above filter.

The above anti-counterfeit printed matter was copied using a commercially available color copying machine (Acolor 935, manufactured by Fuji Xerox Co., Ltd., copying condition: normal mode), and the appearances of the genuine product and the copied product were compared and examined. The appearance of this duplicate was reproduced with a high degree of accuracy, but when the light was transmitted, the watermark pattern seen in the genuine product was not reproduced, and a filter that cuts off the wavelength range of 640 nm or less was used. When viewed through the eye, red light or violet light was visually recognized in the genuine product, but red light or violet light was not visually recognized in the duplicated product, so that the genuine product and the duplicated product were extremely easily distinguished. Note that, other than the above-described metameric pair ink, a metameric pair ink having a high spectral reflectance in an ultraviolet region of 450 nm or less may be used.

(Embodiment 6) Anti-counterfeit printed matter 1 of Embodiment 1
The thickness of the transparent base material that is the core sheet 2 of Example 1 is set to 720 μm, the first printing layer 3 is formed by the offset printing method using the printing ink having the composition described in Example 1, and at least a part thereof is formed. An anti-counterfeit printed matter was prepared in the same manner as in Example 1 except that the colorless and transparent inorganic fluorescent ink was used for offset printing. ○ Inorganic phosphor ink composition 90 parts by weight of ultraviolet (UV) curable offset ink (trade name: FDS Medium TC-Ro, manufactured by Toyo Ink) 10 parts by weight of inorganic fluorescent pigment (ZnO: Zn-based)

The above-described anti-counterfeit printed matter was copied using a commercially available color copying machine (Acolor 935, manufactured by Fuji Xerox Co., Ltd., copying condition: normal mode), and the appearances of a genuine product and a duplicated product were compared and examined. The appearance of this duplicate was reproduced with high accuracy, but when the light was transmitted therethrough, the watermark pattern seen in the genuine product was not reproduced, and the UV light (wavelength 2
(0 to 400 nm), the color tone pattern of the genuine product is excited by the phosphor, and it appears that the pattern emerges by emitting blue-green fluorescent light. However, the duplicate product does not cause any change. It was extremely easy to distinguish the copy from the copy. In addition, other than the above-mentioned inorganic phosphor inks, colored inorganic phosphor inks such as white, light yellow, red, and blue may be used.

[0053]

According to the invention described in claims 1 to 3, the concealing layer of the anti-counterfeit printed matter is laminated so that at least a part of the pattern formed by the openings does not overlap. Since the amount of light that passes through the anti-counterfeit printed matter varies depending on the presence of the opening, a watermark pattern is formed, and a gradation should be formed in the watermark pattern depending on whether or not the openings of the hiding layers overlap. This gradation can be formed arbitrarily according to the pattern of each hiding layer, that is, the degree of overlap of the openings provided.

Due to this watermark pattern, it is difficult to completely reproduce a duplicated product using a copying machine, and a special dedicated authenticity determination device is not particularly required, and the authenticity determination can be easily performed visually. Since it is possible, it has a high distinguishability between the genuine product and the duplicate product. In addition, since there is no exposure of transparent parts for copy protection, there are few restrictions on the design, it has a high anti-counterfeiting effect and it has the same design as conventional securities, bonds, checks, gift certificates, certificates or cards etc. It is possible to do. Further, it is possible to delicately set the appearance of the watermark pattern by changing the light transmittance by changing the material or the thickness of the hiding layer.

According to the fifth aspect of the invention, the watermark pattern is formed by the combination of the semitransparent base material and the pattern of the openings provided in the concealing layer, and the translucent layer is not provided, and the translucent layer is not provided. Since the amount of light transmission is controlled by the base material and the concealing layer, a watermark pattern different from the conventional one can be obtained. By setting the states of the semi-transparent substrate and the concealing layer as desired, it is possible to control the amount of light transmission and create a specific watermark pattern. This watermark pattern can be reproduced using a copying machine. However, complete reproduction is difficult, a special dedicated authenticity determination device is not necessary, and authenticity can be easily discriminated by visual inspection, etc., so the distinguishability between the authentic product and the duplicated product is enhanced. be able to. In addition, since there is no exposure of transparent parts for copy protection, there are few restrictions on the design, it has a high anti-counterfeiting effect and it has the same design as conventional securities, bonds, checks, gift certificates, certificates or cards etc. It is possible to do.

According to the invention described in claim 6, the print layer facing the light-transmittable substrate and having micro characters between itself and the concealing layer is visually recognized from the light-transmittable substrate side. However, due to the difference between the character size and the focal length corresponding to the thickness of the light-transmittable substrate, the micro character copied by the copying machine becomes unreadable.

According to the invention described in claim 7, the magnetic material is added and mixed in the printing ink, the information formed in the printing layer is reproduced by the magnetic sensor, and the presence or absence of the forgery is detected by verifying its presence or absence. There is an anti-counterfeiting effect such as facilitating. A specific pattern or the like is formed on a printing layer containing two or more types of coloring materials in which the spectral reflectance greatly changes in a wavelength range where the visibility is low in the printing layer, that is, a metallic layer. By irradiating a predetermined normal light and a light having a spectral energy distribution to make a pattern appear, it is possible to determine the authenticity based on the presence or absence of the pattern.

Further, according to the invention described in claim 8,
By forming the printed layer with the fluorescent ink containing the inorganic fluorescent substance, the presence or absence thereof can be verified by irradiation with a black lamp or the like, and the verification means can be mechanized. Thereby, forgery prevention can be further improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an anti-counterfeit printed matter of the present invention.

FIG. 2 is a cross-sectional view of the forgery-prevention printed matter according to the first configuration along line XX in FIG.

FIG. 3 is a cross-sectional view illustrating a laminate having a watermark pattern exhibiting gradation by the combination of patterns of the present invention.

FIG. 4 is a cross-sectional view of an anti-counterfeit printed matter according to the second configuration.

FIG. 5 is a cross-sectional view of an anti-counterfeit printed matter according to the third configuration.

FIG. 6 is a spectral characteristic curve of the metameric pair ink described in Example 5 used in the printing layer of the anti-counterfeit printed matter of the present invention.

[Explanation of symbols]

 A laminate 1, 11, 21 anti-counterfeit printed matter 2, 12, 22 core sheet 3 first printing layer 4 first hiding layer 5 second hiding layer 6 second printing layer 7 combination pattern 8 pattern 9 opening 10 Watermark Pattern 13 First Concealment Layer 14 Second Concealment Layer 15 First Printing Layer 16 Second Printing Layer 17 Combination Pattern 18 Pattern 19 Opening 23 Concealment Layer 24 First Printing Layer 25 Second Printing Layer 27 patterns 28 openings

Claims (8)

[Claims] 1. A forgery-preventing printed matter comprising a light-transmittable laminate, comprising at least two concealing layers having a pattern formed by openings which do not overlap each other between the layers of the laminate. An anti-counterfeit printed matter, which has a watermark pattern that is a laminate of the above and has a gradation that is a combination of the above patterns. 2. A light-transmissive substrate, a first printing layer, two or more concealing layers having a pattern formed by openings that do not at least partially overlap each other, and a second printing layer. An anti-counterfeit printed matter, which has a watermark pattern formed by stacking and a gradation pattern by a combination of the above patterns. 3. A concealing layer and a printing layer are laminated on both sides of a light-transmissive base material, and the concealing layer has a pattern composed of openings that do not at least partially overlap each other. An anti-counterfeit printed matter, which has a watermark pattern exhibiting gradation by a combination of the patterns. 4. The anti-counterfeit printed matter according to claim 1, wherein the light-shielding layers have different light transmittances. 5. A semi-transparent substrate is provided with a concealing layer having a pattern composed of openings and a first printed layer on one surface and a second printed layer on the other surface. Anti-counterfeit printed matter. 6. The information according to claim 1, wherein information consisting of micro characters is formed on a part of the print layer.
The anti-counterfeit printed matter according to any one of 3 and 5. 7. The color layer according to claim 1, wherein the printed layer contains a colored colorant having a large spectral reflectance change in a wavelength range having low visibility. Anti-counterfeit printed matter. 8. The anti-counterfeit printed matter according to claim 1, wherein the printed layer contains an inorganic phosphor whose color tone is changed by irradiation with ultraviolet rays.