JP3855018B2 - Authenticity discrimination method of invisible printed matter, invisible printed matter and discrimination tool thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to valuable printed matter that needs to prevent counterfeiting and copying of banknotes, stock certificates, securities, passports, cards, etc. An arbitrary uneven pattern printed from at least one of the transparent inks is difficult to see, but the invisible pattern can be visually recognized when observed with the discriminator closely attached or when irradiated with white light. The present invention relates to a printed matter authenticity discrimination method, an invisible printed matter thereof, and a discrimination tool thereof.
[0002]
[Prior art]
Due to the nature of precious printed matter such as banknotes, stock certificates, securities, passports, passports, cards, etc., they are required not to be counterfeited or tampered with. As a preventive measure, a technique related to a forgery-preventing printed matter for printing a transparent ink having a fluorescent agent added to a base material is used. A printed matter printed with a transparent ink to which a fluorescent agent has been added is usually not visible to the naked eye with visible light, but when this printed matter is irradiated with energy rays such as ultraviolet rays, the transparent ink to which the fluorescent agent has been added It is possible to determine the authenticity of the information printed on the screen by making it fluorescent and manifest.
[0003]
In addition, a method of imparting unevenness to paper by using intaglio printing or the like for banknotes has already been used as an anti-counterfeiting technique, and has been intaglio printed by the touch of a person by hand or forged. Can be determined.
[0004]
On the other hand, as a method for performing simple authenticity determination using a determination tool in a printed matter, for example, a pattern that is shifted by a half cycle between a pattern portion and an edge portion is printed, and the appearance of the edge portion on the background is printed. A method in which a moiré is generated by overlapping a discriminating tool having a pattern that interferes with the border on a print that has a color and density that cannot be discriminated by the method (Japanese Patent Laid-Open No. Hei 10-2010). No. 100529).
[0005]
[Problems to be solved by the invention]
In this way, anti-counterfeiting technology using intaglio printing or the like has already been used, and a method of recognizing the unevenness by tactile sensation by touching the intaglio printing portion or a machine using a displacement meter etc. Can do.
[0006]
However, since the method using a machine is large and time consuming, it cannot be easily and quickly recognized, and the location and shape of the unevenness for a person to touch the unevenness. Must be confirmed with the naked eye. For this reason, there is a possibility that reproduction with pseudo embossing may be performed.
[0007]
From the above, the present invention aims to solve the above-mentioned problems, and it is difficult to visually recognize the uneven pattern with the naked eye, but when the discriminator is closely attached and observed, it is irradiated with white light. Since the concavo-convex pattern can be visually recognized when observed, it is possible to easily determine authenticity by using a determination tool. Even if it is difficult to identify the shape of the concavo-convex pattern by printing a pattern different from the shape of the concavo-convex pattern in the same area as the concavo-convex pattern, it is possible to easily identify only the shape of the concavo-convex pattern The present invention proposes a method for determining the authenticity of an invisible printed material, an invisible printed material, and a determination tool thereof.
[0008]
The present invention provides a concavo-convex pattern on a base material, and the concavo-convex pattern is printed on at least one of the same color ink or transparent ink as the base material on an invisible printed matter that is difficult to identify with the naked eye. using a discrimination tool formed of a light transmissive substrate having printed the dot pattern, the uneven pattern provided on the substrate, in close contact with the surface of line pattern or dot pattern of the discrimination tool is printed observed In this case, a shadow of the line pattern or halftone dot pattern of the discriminating tool is generated in the recessed area of the concave-convex pattern, and the concave-convex pattern visualized by the shadow is visually recognized from the non-printing part of the discriminating tool. This is a method for determining the authenticity of an invisible printed matter.
[0009]
In addition, the present invention provides a concavo-convex pattern on a base material, and the concavo-convex pattern is a line pattern on an invisible printed matter that is difficult to identify with the naked eye printed from at least one of the same color ink or transparent ink as the base material. Alternatively, using a discriminator made of a light-transmitting substrate on which a halftone dot pattern is printed, the surface on which the line pattern or halftone dot pattern of the discriminator is printed is brought into close contact with the concavo-convex pattern provided on the base material. When observed by irradiating with white light, a shadow of a line pattern or a halftone dot pattern of the discriminating tool is generated in a concave region of the concavo-convex pattern, and is visualized by the shadow from a non-printing part of the discriminating tool A method for determining the authenticity of an invisible printed matter, wherein the uneven pattern is visually recognized .
[0010]
Further, the present invention provides a concavo-convex pattern on a substrate, the concavo-convex pattern is printed from at least one of the same color ink or transparent ink as the substrate, and concealed by pattern printing with colored ink on the concavo-convex pattern Using a discriminator consisting of a light-transmitting substrate printed with a line pattern or a halftone dot pattern on an invisible printed matter that is difficult to identify with the naked eye having a layer, an uneven pattern provided on the base material is When the surface on which the line pattern or the halftone dot pattern is printed is closely contacted and observed by irradiating light of the same color as the colored ink, the line pattern or A method for determining the authenticity of an invisible printed matter , wherein a shadow of a halftone dot pattern is generated and the uneven pattern visualized by the shadow is visually recognized from a non-printing portion of the determining tool .
[0011]
Further, the present invention provides a concavo-convex pattern on a substrate, the concavo-convex pattern is printed from at least one of the same color ink or transparent ink as the substrate, and pattern printing with colored fluorescent ink on the concavo-convex pattern; Light transmission through which a line pattern or a halftone dot pattern is printed on an invisible printed matter having a concealing layer printed with a colorless fluorescent ink that emits the same color as the colored fluorescent ink when irradiated with energy rays, which is difficult to identify with the naked eye Using a discriminating tool made of a conductive substrate, the surface on which the line pattern or halftone dot pattern of the discriminating tool was closely attached to the uneven pattern provided on the base material was observed by irradiating energy rays. In this case, the pattern printing and the solid pattern are colored in the same color, making it difficult to visually recognize the pattern printing. Further, the line pattern or halftone dot pattern of the discriminator is formed in the recessed area of the uneven pattern. Over shadow down occurs, it is authenticity discrimination method invisible printed material, wherein the uneven pattern that is visualized is visually recognized by the shadow from the non-printing portion of the discrimination tool.
[0024]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the basic principle of the present invention. When the discriminating tool 2 is brought into intimate contact with the concave-convex patterned base material 1 produced by intaglio printing, screen printing, or the like, and light is irradiated by the illumination 3 from an oblique direction, the shadow of the pattern imparted to the discriminating tool causes The uneven pattern can be visually confirmed.
[0025]
As an example, in the case of a substrate 4 with a concavo-convex pattern to which the concavo-convex pattern 5 of “A” is given as shown in FIG. 2, when a line-shaped pattern 7 is given to the discriminator as shown in FIG. The discriminating tool provided with the line pattern is brought into close contact with the surface provided with the unevenness by the intaglio ink as shown in FIG. At this time, it is necessary to make the surface provided with the line pattern in the discriminator closely contact the intaglio ink. By irradiating the illumination from an oblique direction, a shadow 10 due to the line pattern of the discriminating tool is generated in the unevenness due to the intaglio ink. When this state is observed from the top, in addition to the line pattern 8 of the discriminator on the concavo-convex pattern, the shadow 10 generated in the non-concave portion can be observed from the non-image portion 9 of the discriminator. A certain “A” can be recognized. Even when the base material is flexible and the base material in FIG. 4 contacts the discriminating tool, the distance from the discriminating tool is maintained in the vicinity of the intaglio ink, so that the uneven pattern can be identified as a result. It is. The concavo-convex pattern can be produced in either a convex shape or a concave shape, and at this time, the pattern imparted by the concave and the pattern imparted by the convex are observed as white and black are inverted, respectively.
[0026]
However, if the pattern given to the discriminator is a line pattern, if both the illumination direction and the observation direction are in the direction of the line or directly above, or if they are exactly the same, the generated shadow cannot be recognized, Although the uneven pattern “A” cannot be recognized, the illumination direction and the observation direction may be arbitrary as long as other conditions are satisfied. Moreover, when the pattern provided to the discriminator is a halftone dot pattern, the illumination direction and the observation direction may be arbitrary except for the case where the illumination direction and the observation direction are exactly the same.
[0027]
Moreover, the light-transmitting substrate used for the discriminator may be made of plastic or glass. When the pattern applied to the discriminator is the above-described line pattern, the number of lines is about 150 to 300 per inch. If there is, an uneven pattern can be recognized. In addition, the same effect can be obtained with a halftone dot pattern. In the case of a halftone dot pattern, an uneven pattern can be recognized if the number of lines is 150 to 300 lines. The halftone dot shape is not particularly limited, and square dots, chain dots, round dots, special halftone dots, and the like can be used. The line shape is not particularly limited, and a parallel line, a wave line, or the like can be used. Also, each pattern to be applied to the discriminator need only have high opacity for generating a shadow, and if the opacity is high, white other than black is also possible, and is not particularly limited. Absent.
[0028]
Moreover, the concealment of the uneven | corrugated pattern 11 when it observes in the state which does not contact | adhere a discriminating tool can be improved by giving the printed pattern 12 to the surface which sticks a discriminating tool like FIG. However, when the printed pattern 12 is applied using colored ink, the discriminator is brought into close contact, and white light is irradiated, the white light is passed through a color filter or a light emitting diode is used to inhibit visibility of the uneven pattern 11. By using this, light having the same color as or similar to that of the colored ink or irradiating light instead of white light can be used to suppress a decrease in the visibility of the concavo-convex pattern 11 due to the printed pattern 12. The printed pattern 12 of the present invention is not particularly limited, and a chromatic pattern, minute characters, solids, and a normal pattern can be used. The colored ink of the present invention is not particularly limited. However, when black ink is used, the effect of the present invention cannot be obtained if the printed pattern is solid.
[0029]
Further, as shown in FIG. 6, the printed pattern is a pattern 15 made of colored fluorescent ink, and a solid pattern 17 over the entire surface of the concavo-convex pattern made of colorless fluorescent ink that develops the same color as or similar to that of the colored fluorescent ink when irradiated with energy rays such as ultraviolet rays. Thus, when an energy ray such as ultraviolet rays is irradiated, only the concavo-convex pattern can be visually recognized by making the pattern made of colored fluorescent ink invisible. In addition, as long as it colors with the same color or the hue approximated at the time of irradiation, such as an ultraviolet-ray, a color fluorescent ink may use multiple colors for the same area | region.
[0030]
The concavo-convex pattern of the present invention is applied using a printing method that can have a mark on ink such as intaglio printing or screen printing using ink of the same color as the base material, ink of a hue similar to the base material, or transparent ink. May be. Further, if the height of the unevenness is about 5 microns or more, the discrimination is possible. Moreover, the base material should just have the smoothness of the grade which does not inhibit the provided unevenness | corrugation. In addition, the concavo-convex pattern is made of characters, symbols, and patterns to improve the authenticity discrimination effect.
[0031]
As the base material of the present invention, paper sheets, films, plastics, metals and the like can be used.
[0032]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.
[0033]
Example 1
In order to give unevenness to the base material, an intaglio ink having the same color as that of the base material was prepared and intaglio printing was performed to give a convex pattern. A glass plate with 150 parallel lines printed on one side was used as the discriminator. The surface with the parallel lines of the discriminating tool is brought into close contact with the convexity, and the discriminating tool and the base material are irradiated with white light (in this embodiment, a flashlight) from an oblique direction. By observing, a convex pattern could be confirmed. Moreover, even if it irradiated with white light from the front and observed, the convex pattern was able to be confirmed. Although a convex pattern is used in this embodiment, the same effect can be obtained even with a concave pattern.
[0034]
(Example 2)
In order to give unevenness to the base material, a stencil ink having the same color as the base material was prepared and stencil printing was performed to give a convex pattern. In order to reduce the visibility of the convex pattern when the discriminator is not in close contact, it is colored red so that it overlaps with the convex pattern when observing under visible light and red when observing under ultraviolet light. Pattern printing using fluorescent ink is performed by offset printing, and it is colorless and transparent under visible light, and covers the entire surface with colorless fluorescent ink that emits red light of the same color as colored fluorescent ink when observed under ultraviolet light. A solid pattern was printed by offset printing. A glass plate with 150 parallel lines printed on one side was used as the discriminator. Colored fluorescence by closely observing the surface of the discriminator and the convex pattern with ultraviolet rays from the front direction, in close contact with the location where the convex pattern is applied. Since it was difficult to visually recognize the printed pattern, only a convex pattern could be confirmed.
[0035]
Example 3
In order to give unevenness to the substrate, a transparent intaglio ink was prepared and intaglio printing was performed to give a convex pattern. In order to reduce the visibility of the convex pattern in a state where the discriminating tool is not in close contact, the pattern was printed with normal colored ink so as to overlap the convex pattern. A glass plate with 150 parallel lines printed on one side was used as the discriminator. The surface with the parallel lines of the discriminating tool is brought into close contact with the place where the convex pattern is applied, and the same color as the colored ink used for pattern printing from an oblique direction to the discriminating tool and the convex pattern By irradiating the light through the filter and observing it, it was difficult to visually recognize the pattern printed with the colored ink, so only the convex pattern could be confirmed.
[0036]
Although the present invention has been described based on the embodiment of the present invention, the present invention is not limited to this embodiment, and various other implementations are possible within the scope of the technical idea described in the claims. Possible forms.
[0037]
【The invention's effect】
The concavo-convex pattern is difficult to visually recognize with the naked eye, but the concavo-convex pattern can be visually recognized when observed with the discriminator closely attached or when irradiated with white light or the like. It is possible to determine authenticity easily and reliably simply by using a discriminating tool. Those who do not know the location of the concavo-convex pattern do not understand where the concavo-convex pattern is formed, making it difficult to replicate. .
[0038]
In addition, since the discriminator need only be about the size of the concavo-convex pattern to be recognized, there is no need for an installation space for the discriminating device, and the size can be carried around. In addition, as long as the pattern of the discriminating tool, the illumination conditions, and the observation direction satisfy certain conditions, the shape of the concavo-convex pattern may be any shape, and it is not necessary to precisely align and overlap with the discriminating tool. Therefore, it can be used as a very easy discrimination method.
[0039]
[Brief description of the drawings]
FIG. 1 is a diagram showing the basic principle of the present invention.
FIG. 2 is a diagram showing an uneven pattern in the present invention.
FIG. 3 is a diagram showing an example of a discriminator according to the present invention.
FIG. 4 is a diagram showing the basic principle of the present invention.
FIG. 5 is a diagram showing a concealing pattern with colored ink in the present invention.
FIG. 6 is a diagram showing a concealing pattern using a fluorescent ink according to the present invention.
[Explanation of symbols]
1 Substrate with concavo-convex pattern (invisible print)
2 Discriminator 3 Illumination 4 Uneven pattern base material (invisible printed matter)
5 Uneven pattern 6 Light-transmitting substrate 7 of discriminator tool Line-like pattern 8 given to discriminator tool Line-like pattern 9 given to discriminator tool Base material part of concave-convex pattern base material (non-image part) )
10 Shadows generated by the discriminator 11 Concave and convex pattern 12 Concealed pattern with colored ink 13 Substrate with concave and convex pattern (invisible printed matter)
14 Concave and convex pattern 15 Concealed pattern with colored fluorescent ink 16 Substrate with concave and convex pattern (invisible print)
17 Solid pattern with colorless fluorescent ink

Claims (4)

A concavo-convex pattern is provided on a base material, and the concavo-convex pattern is printed with a line pattern or a halftone dot pattern on an invisible printed matter printed with at least one of the same color ink or transparent ink as the base material and difficult to identify with the naked eye. When using the discriminating tool made of a light-transmitting substrate, the uneven pattern provided on the base material was observed by closely adhering the surface on which the line pattern or halftone dot pattern of the discriminating tool was printed , A shadow of a line pattern or a halftone dot pattern of the discriminating tool is generated in a recessed area of the concave-convex pattern, and the concave-convex pattern visualized by the shadow is visually recognized from a non-printing part of the discriminating tool. A method for determining the authenticity of invisible prints. A concavo-convex pattern is provided on a base material, and the concavo-convex pattern is printed with a line pattern or a halftone dot pattern on an invisible printed matter printed with at least one of the same color ink or transparent ink as the base material and difficult to identify with the naked eye. Using a discriminator made of a light-transmitting substrate, the surface on which the line pattern or the dot pattern of the discriminator is printed is brought into close contact with the concavo-convex pattern provided on the base material and irradiated with white light. When the observation pattern is observed, a shadow of the line pattern or halftone dot pattern of the discriminating tool is generated in the recessed area of the concave / convex pattern, and the concave / convex pattern visualized by the shadow from the non-printing part of the discriminating tool. A method for determining the authenticity of invisible printed matter, characterized by being visually recognized . On the base material, a concavo-convex pattern is provided, and the concavo-convex pattern is printed from at least one of the same color ink or transparent ink as the base material, and the naked eye has a concealing layer by pattern printing with colored ink on the concavo-convex pattern. Using a discriminator consisting of a light-transmitting substrate printed with a line pattern or a halftone dot pattern on an invisible printed matter that is difficult to identify, the line pattern or halftone dot of the discriminator on the uneven pattern provided on the base material When the surface on which the pattern is printed is closely attached and observed by irradiating light of the same color as the colored ink, the shadow of the line pattern or halftone dot pattern of the discriminator is in the recessed area of the uneven pattern. A method for determining authenticity of an invisible printed matter, wherein the uneven pattern visualized by the shadow is visually recognized from a non-printing portion of the determining tool . Provided with a concavo-convex pattern on the substrate, the concavo-convex pattern is printed from at least one of the same color ink or transparent ink as the substrate, pattern printing with colored fluorescent ink on the concavo-convex pattern, and the colored fluorescent ink, Discriminator consisting of a light-transmitting substrate printed with a line pattern or a halftone dot pattern on an invisible printed matter that is difficult to identify with the naked eye, which has a concealing layer printed with a solid pattern of colorless fluorescent ink that emits the same color when irradiated with energy rays The pattern printing is performed when the surface on which the line pattern or the dot pattern of the discriminator is printed is closely adhered to the uneven pattern provided on the base material and observed by irradiating energy rays. And the solid pattern are colored in the same color, making it difficult to visually recognize the pattern print. Further, a shadow of the line pattern or halftone dot pattern of the discriminating tool is generated in the recessed area of the uneven pattern. , Authenticity discrimination method of invisible printed material, wherein the uneven pattern that is visualized by the shadow from the unprinted portion of said discrimination member is viewed.

Images