JP2004174829A - Antiforgery paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antiforgery paper enabling easiy discrimination of a duplicate copy of it when a document such as a registration certificate of a seal impression, a resident registration certificate or a receipt is duplicated with a copying machine. <P>SOLUTION: This antiforgery paper is formed by printing dots of a micro-indicating means indicated by the difference of its color density to the color density of a ground tint in the ground tint indicated by the difference of its color density to the color density of a background color printed on the paper. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to tamper-proof paper that can easily determine that a copy paper is a copied paper when documents such as a seal registration certificate, a resident registration certificate, and a receipt are copied by a copying machine. Things.
[0002]
[Prior art]
Conventionally, a wide variety of known tamper-proof papers (forgery-prevention papers) have already been developed. It is classified into forgery prevention paper in which a forgery prevention piece or the like having a multilayer structure in which the layers are integrated is provided integrally with the base paper, and forgery prevention paper in which a forgery prevention printing layer is applied to the base paper.
[0003]
The structure of the conventional anti-counterfeit paper, in which a multi-layer anti-counterfeit piece is provided integrally with the base paper, consists of an adhesive layer, a reflective thin film layer, a hologram forming layer, and a peelable protective layer in order on the support. Forgery prevention pieces such as hologram film pieces formed by stacking are integrally laminated on the surface of the base paper, and the forgery prevention paper is used for securities such as stock certificates, bonds, checks, gift certificates, etc. Furthermore, it is known that the card is used as a pre-bait card, an ID card, or the like (for example, see Patent Document 1).
[0004]
Further, a conventional anti-counterfeit paper in which a base paper is provided with a forgery prevention printing layer is one in which a latent image composed of different halftone dots and a background pattern surrounding the latent image are printed on a desired surface of the base paper. The background pattern is selected by selecting the size and density of halftone dots that cannot be copied due to the resolution of the copying machine, and the latent image is selected by selecting the size and density of halftone dots that can be copied. The forgery prevention paper is suitable for use as, for example, a seal registration certificate, a resident registration certificate, and the like (for example, see Utility Model Registration Document 1).
[0005]
[Patent Document 1]
JP-A-11-21793 (Claim 1 and FIG. 1)
[Utility model registration document 1]
Japanese Utility Model Registration No. 3079230 (Claim 1 and FIG. 1)
[0006]
[Problems to be solved by the invention]
However, as disclosed in Patent Document 1, forgery prevention paper in which a forgery prevention piece having a multi-layer structure is integrally provided with a base paper, the structure of the forgery prevention paper itself, particularly, the process of forming the forgery prevention piece, is difficult. Due to their complexity and cost, this anti-counterfeiting paper is required to produce high-performance, high-precision anti-counterfeiting counterfeiting securities, such as stock certificates, bonds, checks, and gift certificates. Although it is effective as anti-counterfeit paper, it is economical as anti-counterfeit paper to be used to create printed materials such as seal registration certificates, resident registration certificates, or confidential documents that are handled in large quantities at government offices, etc. This is disadvantageous and lacks practicality.
[0007]
Therefore, as forgery prevention paper which is advantageously used to prepare papers such as a seal registration certificate, a resident registration certificate, etc., from the economic point of view, it is necessary to prevent unauthorized use as described in the above-mentioned Utility Model Registration Document 1. Sheets are known.
[0008]
As described above, this unauthorized use prevention sheet includes a background pattern printed by selecting the size and density of non-copiable halftone dots due to the resolution of the copier, and the size and density of non-copiable halftone dots. In the case of a seal registration certificate created using this unauthorized use prevention sheet, for example, a combination with a latent image printed by selecting the density, if this is copied, the background pattern is copied by the resolution of the copying machine. However, since the latent image is displayed overlapping the stamping position of the seal, the copy paper on which the latent image is displayed can be recognized as being illegally copied.
[0009]
However, since the latent image previously applied to the unauthorized use prevention sheet is a print made up of a large number of halftone dots, even the latent image can be easily visually observed on the print sheet surface. For this reason, the latent image applied to the conventional unauthorized use prevention sheet is not camouflaged, but gives a sense of discomfort to the background pattern printed and displayed in advance.
[0010]
In addition, since the latent image is displayed on the copy paper on which the above-mentioned unauthorized use prevention sheet is copied, the copy paper on which the latent image is displayed is the copy paper which is copied exactly. On the other hand, it is obvious at first glance that the latent image displayed on the copy paper surface may interfere with a predetermined entry and hinder the reading of the entry.
[0011]
The present invention has been made in view of the above-mentioned facts, and has no tamper-resistant paper in which micro display means that cannot be reproduced with the resolution of a copying machine are printed in a copy-forgery-inhibited pattern printed on the base paper. In a normal use state of the tamper-proof paper, it is difficult to know (camouflage) whether or not the paper is provided with forgery prevention means, so that the paper can be used as a comfortable paper, and the paper can be copied by a copying machine. In the obtained copy paper, it is possible to detect that the form of the micro display means is collapsed by the resolution of the copying machine, and to prevent tampering so that the copy paper can be easily recognized as being copied. The primary purpose is to provide paper.
[0012]
In addition, the present invention can improve the production economics and improve the practicality by making it possible to create tamper-proof paper used for, for example, a seal registration certificate, a resident registration certificate, and the like using only ordinary printing means. The second object is to provide excellent tamper-proof paper.
[0013]
[Means for Solving the Problems]
The object is to prevent tamper-proof paper in which micro-display means for displaying a color density difference with respect to a display color of the background pattern are interspersed in a background pattern displayed with a color density difference from a background color printed on a paper surface. Is achieved by
[0014]
In a preferred embodiment of the present invention, the micro display means is a micro character or a micro image.
[0015]
Further, a preferred embodiment of the present invention is characterized in that the copy-forgery-inhibited pattern and the micro display means are formed with a high-density line number of 200 lines or more.
[0016]
Furthermore, a preferred embodiment of the present invention is characterized in that the form of the micro images scattered and arranged in the copy-forgery-inhibited pattern is the same as the copy-forgery-inhibited pattern form for each copy-forgery-inhibited pattern.
[0017]
[Action]
In the tamper-proof paper of the present invention, micro-display means consisting of micro-characters or micro-images are interspersed and arranged in the tint block, so that in the normal use state of the tamper-proof paper, the presence of the micro-display means can be recognized. It is difficult. Further, when the tamper-proof paper of the present invention is copied by a copying machine, the form of the copied micro display means is destroyed due to the resolution of the copying machine, and the micro display means cannot be read.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a tamper-proof paper according to the present invention will be described in detail with reference to the drawings shown as a seal registration certificate.
[0019]
FIG. 1 is an overall explanatory view of the seal registration certificate, FIG. 2 is an enlarged partial view of a main part thereof, and FIG. 3 is a further enlarged partial view of FIG.
[0020]
Reference numeral 1 denotes a tamper-proof sheet, on the surface of which the tamper-proof paper 1 is provided with a tamper-proof print 2 which will be described in detail later. FIG. 1 shows a printed matter in which a seal registration certificate has been created using the falsification prevention paper 1, and on the front surface of the seal registration certificate, an entry frame 3 in which necessary items for the certificate are to be entered, And display characters 4 and the like are provided by printing.
[0021]
The tamper-proof printing 2 applied to the tamper-proof paper 1 is composed of a large number of woven patterns 6 arranged in a desired pattern on the entire surface of the tamper-proof paper 1 or a part thereof (the front surface in the present embodiment). And a micro display means 7 arranged (scattered) in each pattern 6. In the present embodiment, an example in which micro characters are used as the micro display means 7 will be described.
[0022]
The copy-forgery-inhibited pattern 6 is displayed with a color density difference from the background 5 provided around the copy-forgery-inhibited pattern 6. Therefore, the display color density setting of the tint block 6 affects the display color density of the background 5, but if the color density difference between the background 5 and the tint block 6 is about 10% or more, the tint block 6 for the background 5 is effectively displayed. .
[0023]
For example, as shown in FIG. 3, when the copy-forgery-inhibited pattern 6 is to be displayed on a white background, the copy-forgery-inhibited pattern 6 can be displayed by setting the color density of the background 5 to a color having a density of 10% or more of the white background. When the tint block 6 is given a color density, the tint block 6 can be effectively displayed by applying the background 5 with a color density difference of 10% or more with respect to the color density of the tint block 6.
[0024]
Similarly, the display color density of the micro-characters 7 to be displayed in the copy-forgery-inhibited pattern 6 may have a difference of 10% or more from the display color density of the copy-forgery-inhibited pattern 6. ), The display color density of the micro characters is set to 10% or more with respect to white, and the display color density of the tint block 6 is set to 20% with respect to white, and the display color density of the micro characters 7 is set to 30% with respect to white. By making the above or by setting it to 10% or less, the effective display of the micro characters 7 becomes possible.
[0025]
In FIGS. 2 and 3, the color density of the micro character 7 is set to 100% with respect to a white background to make the description of the micro character 7 easy to understand. By setting the density and the approximate value, the camouflage effect of the micro characters 7 can be enhanced.
[0026]
Next, the effective sizes of the copy-forgery-inhibited pattern 6 and the micro characters 7 will be described. The size of a character called a micro character is generally 0.25 mm square (first class), and it is desirable to use a micro character (micro image) of this size. The desirable size of the copy-forgery-inhibited pattern 6 with respect to the size of the micro-characters 7 is required to be a size in which the micro-characters do not protrude into the copy-forgery-inhibited pattern 6, and the effective size of the copy-forgery-inhibited pattern is about 3 mm square ( The size is about 12).
[0027]
In order to clearly display the 0.25 mm square micro-characters 7, for example, as shown in FIG. 3, a high-density line number of 200 lines or more must be formed. Therefore, the copy-forgery-inhibited pattern 6 printed simultaneously with the micro-characters 7 is also formed (displayed) with a high-density line number of 200 lines or more.
[0028]
Although the form of the micro-character 7 is not particularly limited, as shown in FIGS. 2 and 3, the form of the micro-character 7 and the form of the copy-forgery-inhibited pattern 6 are the same. When it is “T”, the shape of the micro character is also “T”, and when the shape of the tint block 6 is “K”, the shape of the micro character is also “K”, so that It is easy to determine the form of the displayed micro-character.
[0029]
As is apparent from the above description, the tamper-proof paper of this embodiment shown in FIG. 3 has a background 5 of 10% color density on a white background of the paper, a white background on the copy-forgery-inhibited pattern 6, and a white background. By printing micro-characters 7 having a density difference of 10% or more in the tint block 6, a target falsification prevention paper is created.
[0030]
Based on the tamper-proof paper, a tamper-proof function is provided by printing a printing pattern corresponding to the intended use, for example, an entry frame 3 and a display character 4 as shown in FIG. For example, a paper for a seal registration certificate is created.
[0031]
Further, any one or all of the background 5, the copy-forgery-inhibited pattern 6, and the micro-characters 7 can be selectively subjected to monochrome printing or color printing.
[0032]
【The invention's effect】
As described above, the tamper-proof paper of the present invention has micro display means arranged (scattered) inside the tint block applied to the paper surface of the paper, so that when this paper is copied by a copying machine, the copy is performed. On paper, the form of the micro display means is lost in relation to the resolution of the copying machine and the copy is made. Therefore, by confirming that the form of the micro display means is lost, the copy paper is copied by the copy machine. Can be determined. Therefore, it is effective in preventing falsification (forgery) of certificates and the like.
[0033]
Also, a micro display means for displaying a color density difference with respect to the background pattern is arranged and printed inside a background pattern which is displayed with a color density difference with respect to the background. The presence of the display means is difficult to read, and therefore, the tamper-proof function is effectively camouflaged, so that tamper-proof paper can be provided that does not have a strange appearance.
[0034]
Further, if the color density of the micro display means is set to the same color density as that of the background or to a color density similar to that, the existence of the micro display means becomes more difficult to understand, and the appearance of the paper by the background and the tint block is improved. Is not impaired.
[0035]
When copying using a copying machine based on the tamper-proof paper, the form of the micro display means is lost due to the resolution of the copying machine and the copy is performed. It can be easily determined whether or not the sheet is a copied sheet.
[0036]
Furthermore, the tamper-proof paper according to the present invention is a printing paper that can be easily printed by employing a well-known printing means that prints using a plate, so that it is possible to provide a tamper-proof paper that is inexpensive and economical. .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of a seal registration certificate provided with a falsification preventing means according to the present invention.
FIG. 2 is an enlarged view of a main part of FIG. 1, and is an explanatory diagram showing forms of a background, a copy-forgery-inhibited pattern, and micro-characters.
FIG. 3 is an enlarged explanatory view showing forms of a copy-forgery-inhibited pattern and micro-characters arranged in the copy-forgery-inhibited pattern;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tamper-proof paper 2 ... Tamper-proof printing 3 ... Entry column 4 ... Display character 5 ... Background 6 ... Ground pattern 7 ... Micro character

Claims (4)

Tamper protection characterized in that micro-display means, which is displayed with a color density difference from the display color of the copy-forgery-inhibited pattern, are scattered in a copy-forgery-inhibited pattern displayed with a color density difference from a background color printed on paper. Paper. The tamper-resistant paper according to claim 1, wherein the micro display means is a micro character or a micro image. The tamper-proof paper according to claim 1 or 2, wherein the copy-forgery-inhibited pattern and the micro display means are formed with a high-density line number of 200 lines or more. The tamper-proof paper according to any one of claims 1 to 3, wherein the form of the micro images scattered and arranged in the copy-forgery-inhibited pattern is the same as the copy-forgery-inhibited pattern form for each copy-forgery-inhibited pattern.

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