JPH10850A - Printed matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anti-forgery effect even at a conventional print level by indicating individual information on a basic material provided entirely or partially with a lustered face and making the lustered face visible at least partially so that a forged copy can be checked visually at a glance. SOLUTION: An anchor layer 2 of polyester based resin is provided on a basic material 1 of paper, plastic, etc., and a metal deposition layer 3 of aluminum or the like is formed thereon by vacuum deposition. The metal deposition layer 3 provides a lustered face entirely or partially on the basic material 1 and an individual information printing layer 4 is printed thereon and a protective layer 5 of polyester based resin, acryl based resin, etc., is laminated thereon, as required, in order to protect the entire surface of a printed matter 10. Since the lustered face is reproduced in black or dark gray for a forgery of printed matter and an abnormal copied picture is produced, a forgery can be recognized visually at a glance and checked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed matter having a function of determining the authenticity of a forged copy using a color copier.

[0002]

2. Description of the Related Art In recent years, banknotes that must have been subjected to advanced counterfeit prevention measures due to technological advances in color copiers,
Counterfeit printed matter such as securities such as gift certificates and stock certificates, admission tickets, invitation tickets, commuter passes and the like have become circulating, which has become a social problem. As a countermeasure to prevent such counterfeiting, if a part of the printed matter has been printed with silver ink in the past, if the printed matter is copied in color and a copy is made, the silver ink of the printed matter will be used. The glossy silver color is not reproduced in the copy but becomes gray, so that it is possible to determine that the copy is a forged copy, and it is known that the copy has an anti-counterfeit effect. In Japanese Patent Application Laid-Open No. 7-309062, two types of halftone dots having different densities formed by screen rulings having different pitches and having different densities are provided so as to be visually invisible in printed matter. There has been proposed a copy check pattern printed matter in which patterns are formed adjacent to each other, and when a color copy is performed, the density balance is lost and a specific pattern becomes apparent. This is due to a defect of a color copier which lacks resolution and makes it difficult to reproduce minute halftone dots.

[0003]

By the way, silver ink is prepared by mixing a metal powder such as aluminum into a vehicle, and its reflection surface is rough when viewed macroscopically. From the light emitted at an angle of 45 ° to the surface normal
CC installed at 0 ° direction to the normal of the surface
A part of the reflected light reaches the light receiving portion such as D, and the color copier reproduces the silver ink surface in a light gray hue without gloss. However, such a change in the silver color of the printed material from the silvery surface with a weak shine to the light gray color of the copy has insufficient impact, and some people are not aware of the abnormality of the change, and the color copy (forgery). There is a problem that a printed matter may be mistaken for a genuine printed matter, and such a change has a problem that the ability to control counterfeiting is insufficient. Further, in the case of silver ink, the reflectance cannot be increased unless the ink layer is thickened, and there is a problem that it is difficult to use it for an ID card, a regular ticket, or the like that requires flatness and smoothness of the surface. . In the case of a printed copy check pattern,
Copies produced by color copiers have a potentially impactful change that reveals potentially hidden patterns such as warning characters and graphics, making it easy to visually identify forged copies. It has the effect of preventing counterfeiting or the use of counterfeiting. However, if the performance of the color copier, such as the resolution, is further improved in the future, it is expected that the reproducibility of the color copier will be improved, and the effect of preventing forgery of the printed copy check pattern will be reduced. It is sufficient to perform more vivid halftone printing to counter the technical progress of this copier, but there is a problem that higher precision plate making and printing techniques are required, and printing costs are increased. The present invention has been made in view of the above-described problems, and can be easily determined to be a fake copied only by visual inspection, and even if the printing accuracy is at a conventional level, the forgery prevention effect is lost. Not intended to provide printed matter.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides individual information display on a base material having a glossy surface formed on the entire surface or a part thereof, and at least a part of the glossy surface. Are made visible, the color change on the glossy surface of the printed matter (genuine) and the copied matter (fake) is intensified, and it is easy to visually determine the authenticity. further,
When the 45 ° irradiation and the 0 ° light receiving reflectance of the glossy surface are set to less than 30%, the authenticity can be more easily determined.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram illustrating the principle of a printed matter according to the present invention. In general, in a color copier, as shown in FIG. 1, light is emitted from a light source at an angle of 45 ° with respect to the normal of the original surface to be copied, and the normal line of the original surface out of the light reflected and scattered on the original surface. A method is adopted in which light reflected in the direction of 0 ° is captured by a light receiving unit and its intensity is read. In the present application, all angles are angles with respect to the normal line of the document surface (printed material surface). In many cases, the original is a multi-color printed matter, and the intensity of the three primary color components of the reflected light reaching the light receiving portion from the surface of the multi-color printed matter is measured, and the density gradation and color tone of the original are reproduced accordingly. I have. FIG.
(A) is the case of a general white paper surface, the illumination light is reflected and scattered on the surface of the original, only the light reflected in the 0 ° direction reaches the light receiving unit, and the intensity is measured, and the density is adjusted according to the intensity. Will be reproduced. The reflection distribution in the case of a normal white paper surface is substantially uniform, and the reflectance in the 0 ° direction is larger than that of a glossy surface described below, and is reproduced as white in a copy made by a copying machine. But,
When a glossy surface, for example, a metallic glossy surface close to a mirror surface is formed on the document surface, as shown in FIG.
The illumination light irradiated at ° is almost
The light is specularly reflected in the direction of 45 °, and the reflected light hardly reaches the light receiving portion in the direction of 0 °. Therefore, a metallic glossy surface close to a mirror surface is reproduced as black with no brightness in a copy. Further, in the case of the conventional silver ink, as shown in FIG. 1 (b), the degree of reflection and scattering is lower than that of a general white paper surface.
Reflected light distribution is deviated in the regular reflection direction, showing intermediate reflection characteristics between a general white paper surface and a metallic glossy surface close to a mirror surface,
As described above, the copy is copied in a light gray color with no shine. The “brightness” of the glossy surface is because part of the light emitted from various angles is specularly reflected by the entire or part of the glossy surface and enters the eyes. Since no regular reflection light is received and the regular reflection surface cannot be reproduced, it is impossible to reproduce the shine.

[0006] In the color copier described above, 45 °
Ratio of irradiation light and 0 ° reflection light, that is, 45 ° irradiation, 0 °
The light receiving reflectance (hereinafter referred to as reflectance 45-0) can be represented by the following equation. Reflectivity 45-0 = 0 ° reflected light / 45 ° irradiated light
× 100 The inventor found that the reflectance of the glossy surface formed on the printed matter was 45-0.
When the correlation between the color and the reproduction color of the copy was examined, it was confirmed that there was a correlation shown in Table 1.

[0007]

[Table 1] The glossy surface used for the above measurement is an aluminum vapor-deposited surface,
By controlling the surface roughness of the deposition substrate,
A different glossy surface with a reflectivity of 45-0 was obtained. Moreover, the reflectance 45
The measurement of −0 is performed using a Macbeth print contrast meter “PCM-2” using a visual filter. The reflection density of the copy is measured by a Macbeth reflection densitometer RD-918S (visual filter). In this reflection densitometer, illumination light is emitted from 45 ° and reflected at 0 °. The light receiving unit captures the amount of light and performs reflection density conversion. Further, the column based on the visual sensation visually expresses the glossy surface of the printed matter, and the reproduced color of the portion corresponding to the glossy surface of the copy, and visually presents the printed matter and the copy to ten persons in the evaluation column. It checks whether it can be distinguished from genuine and fake, and indicates the number of people who have been identified.

From the results shown in Table 1, if the glossy surface, which looks bright and shines with a specific hue in the printed matter, changes to black or dark gray, which does not shine in the copy, the change is obvious, and the change is obvious to anyone. The person who is not familiar with the printed matter (genuine article) can see the abnormality even by looking at the copy, so the sharpness of the glossy surface greatly enhances the authenticity judgment function and the forgery prevention effect is extremely large. is there.
The problem of the printed matter according to the invention can be solved by taking advantage of this severe change in the glossy surface. As can be seen from the above correlation, the glossy surface that causes such a change is represented by a Macbeth print contrast meter “PCM-
It can be seen that the reflectance 45-0 measured using "2" is obtained by a metallic glossy surface having a range of less than 30%. Conversely, if the reflectance 45-0 is 30% or more, the metallic glossy surface itself becomes a gray with a weak shine, which is reproduced as a light gray with no shine in a copy, and has no impact on the change. Only a change comparable to that with ink is shown. Therefore, 30% of the reflectance 45-0 can be regarded as a boundary value for facilitating the authenticity determination.

A description will now be given of an embodiment of a metallic glossy surface having a reflectivity of 45-0 of less than 30% and a printed material according to the present invention having the same. A metallic glossy surface having a reflectance 45-0 of less than 30% can be obtained by forming a metal thin film by vacuum deposition, sputtering, ion plating, or the like using a glass surface, a smooth plastic surface, or the like as a substrate surface. However, in the case of a plastic surface or paper surface having no smoothness, by forming a metal thin film on the anchor coat layer as a base coat layer for imparting smoothness, or on a laminate of the filling layer and the anchor coat layer. can get. Alternatively, a metal thin film may be formed on the transfer laminate in advance, and the thin film may be transferred to a predetermined position of a printed material via an adhesive layer to form a glossy metal surface.

FIG. 2 is a schematic sectional view of Embodiment 1 of the printed matter according to the present invention. The basic structure of a printed matter according to the present invention is shown in FIG. In the first embodiment, as shown in FIG.
An anchor layer 2 made of a polyester resin or the like is provided, and a metal thin film (hereinafter, referred to as a metal deposited layer) is provided thereon by a vacuum deposition method using, for example, aluminum. This metal deposition layer 3 is shown in FIG.
It may be formed entirely or partially as shown in FIG. That is, the entire surface or a part of the substrate is made a glossy surface.
Next, the individual information is displayed on this by printing or printing. This individual information is defined as "character or graphic information individual to the printed material itself which is not to be copied by a copying machine". In this case, the printed matter includes banknotes, gift certificates, stock certificates, bonds, certificates, appraisal documents, admission tickets, invitation tickets, commuter passes, ID cards, etc.
The individual characters or figures are, for example, characters such as a money amount, a serial number, the name of a factory, a figure of a person, a seal of the Bank of Japan, and a motif, for example, in the case of a banknote. In FIG. 2, the ink layer formed by the above display is referred to as the individual information printing layer 4.
Indicated by. The individual information print layer 4 may be printed using a monochrome or color printer, a thermal transfer ribbon, or the like, such as a ticket. The individual information print layer 4 generally uses opaque ink. In this case, in order to expose the glossy surface having the authenticity discrimination function, it is necessary to avoid covering the entire glossy surface. It must be visible. This does not apply if a transparent ink is used. The position of the visible glossy surface of the printed material 10 on the screen is not particularly limited, but it is desirable to place the glossy surface on a visible portion on the screen layout. It is also important to consider the design so that the above-mentioned change in the glossy surface by visual observation becomes more noticeable in relation to the display pattern of the surrounding individual information. Finally, if necessary, a protective layer 5 made of a polyester-based resin, an acrylic-based resin, or the like is laminated to protect the entire surface of the printed matter 10.

FIG. 3 is a schematic sectional view of a printed matter according to a second embodiment of the present invention. The second embodiment is an application developed based on the basic configuration of the first embodiment. In the printed matter 10 ′ of the second embodiment, the anchor layer 2 and the metal deposition layer 3 are partially provided on the surface of the base material 1, the individual information printing layer 4 is provided thereon, and an explanation and a notice Is provided, a colored layer 6 is provided on the entire surface to color the entire screen, and then the protective layer 5 is provided on the entire surface. The coloring layer 6 is formed by dispersing a dye or a pigment in a medium so as to have a transparent feeling and using various printing methods (offset printing, gravure printing, silk screen printing, etc.). The area where the coloring layer 6 is provided may not be the entire print screen as shown in FIG. 3 but may be limited to a part, for example, a copy-forgery-inhibited pattern printing. The colored layer 6 not only aims at a design effect by giving a transparent hue to the whole print screen, but also can create a metallic glossy surface of gold, copper or the like in combination with the metal deposition layer 3. Such a colored metallic glossy surface still has a large distribution of specularly reflected light, and the reproduced color of the portion corresponding to the glossy surface of the copy changes more drastically than that of the printed matter, and retains an excellent true / false discrimination function. . In addition, since the transparency itself of the colored layer 6 is generally difficult to reproduce by copying with a color copier as in the case of the above-described brilliancy, a material for determining the authenticity of a printed matter (genuine article) and a copied article (fake article) is provided. It also has the effect of doing. The above-mentioned coloring layer 6 does not necessarily need to be provided as an independent layer, and the protective layer may be colored, or the individual information printing layer 4 may be colored using a transparent coloring ink.

FIG. 4 is a schematic sectional view of a printed matter according to a third embodiment of the present invention. The printed matter 10 ″ of the third embodiment is applied and developed based on the basic configuration of the first embodiment as in the case of the second embodiment. In the third embodiment, as in the first embodiment, the metal deposition layer 3 on the entire surface is formed. An image receiving layer 8 for further improving printability is formed thereon, and the individual information printing layer 4 is provided next to the tint block printing layer 9.
Is provided. The individual information print layer 4 in this case is
For example, it is based on the display of information such as a boarding section of a regular ticket and a boarding period, and may be a printing layer formed using a thermal transfer ribbon.

[0013]

EXAMPLES Samples of the present invention were prototyped according to the following specifications and methods. First, as a sample of Example 1, high-quality paper 90 g / m
² was used as a substrate 1, and an acrylic resin was applied thereon to a thickness of 1 μm to form an anchor layer 2. Aluminum was vapor-deposited from above, and a metal vapor-deposited layer 3 of 500 ° was provided. The individual information print layer 4 was formed thereon by offset printing of characters and graphics using dark blue and bright yellow UV inks. Further, a protective layer 5 was provided by coating the entire surface with a transparent acrylate resin OP varnish by offset printing. At the center of the screen, the layout was made so that the characters and figures by the metallic glossy surface and the individual information print layer 4 were adjacent to each other. For the sample of Example 2, a light blue polyester resin layer in which a blue pigment was dispersed was interposed as a colored layer 6 below the protective layer 5. A backside printing layer 7 was provided on the backside of the substrate 1 using offset UV black ink. For the sample of Example 3, a 2 μm polyester resin layer was provided as the image receiving layer 8 following the formation of the metal vapor-deposited layer 3, and the same backside printing layer as in Example 2 was applied. The printed material samples of Examples 1 to 3 prototyped as described above are shown in FIGS.
The area without a print layer that shields light from the outside can be seen as brightly shining with a metallic glossy surface, but a color copier (Pixel Dio (CL
C 500)) in standard mode, the metallic glossy surface was reproduced as dark gray without reflection (reflection density 1.4), and the dark blue individual information printed part and dark gray The contrast hardly disappeared, and a part of the screen was darkened to become an abnormal copy, and it was possible to discriminate a genuine article from a genuine article at a glance. As a result of performing a discrimination test on 10 persons for the confirmation test, all 10 persons could be distinguished at a glance. On the other hand, when the yellow ink was used, the contrast between the dark gray and the yellow was too large, causing an abnormal change on the screen. The result of the same confirmation test was that all ten persons could discriminate. Further, even if the copy conditions of the color copying machine are variously changed from the standard mode to a low density or a high density, it is not possible to alleviate the abnormality appearing in the above-mentioned copy. Further, when the partial deposition is performed as in the printed matter 10 ′ of the second embodiment, the high-quality paper where the non-deposition is performed is reproduced as white, so that the contrast with the metallic glossy portion is increased, which is effective for authenticity discrimination. Example 2
The transparency of the colored layer 6 attempted on the printed matter 10 'was not reproduced at all in copying, and the colored layer 6 was also effective as a material for authenticity discrimination. From the copy tests of Examples 1 to 3 above, it was confirmed that the authenticity of the printed matter according to the present invention was extremely easy and the forgery prevention effect or the check effect was extremely large.

[0014]

According to the printed matter of the present invention, the glossy surface provided on the printed matter is reproduced as black or dark gray even when copying and forgery is attempted with a color copier, and the glossy surface of the printed matter and the copy matter are reproduced. The degree of change from the glossy surface equivalent part is severe,
The screen becomes an abnormal copy, and anyone can visually discriminate between the print (real) and the copy (fake), which has the effect of preventing forgery.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of a printed matter according to the present invention.

FIG. 2 is a schematic sectional view of Example 1 of a printed matter according to the present invention.

FIG. 3 is a schematic sectional view of Example 2 of a printed material according to the present invention.

FIG. 4 is a schematic cross-sectional view of a printed material according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base material 2 Anchor layer 3 Metal deposition layer 4 Individual information printing layer 5 Protective layer 6 Coloring layer 7 Back side printing layer 8 Image receiving layer 9 Background pattern printing layer 10 Printed matter of Example 1 10 'Printed matter of Example 2 10 "Example 3 Printed matter

Claims (2)

[Claims] 1. A printed material characterized in that individual information is displayed on a substrate having a glossy surface formed on the entire surface or a part thereof, and at least a part of the glossy surface is made visible. 2. The printed matter according to claim 1, wherein the 45 ° irradiation and 0 ° light receiving reflectance of the glossy surface is less than 30%.