JP4411175B2 - Anti-counterfeit printed matter - Google Patents

Description

  The present invention relates to various printed materials that can prevent easy counterfeiting and duplication.

  With improvements in performance of printing apparatuses and color copiers, forgery, alteration, duplication, etc. of printed matter can be performed more precisely and easily.

  Therefore, various anti-counterfeit printing techniques have been devised so far for the purpose of preventing forgery of printed matter. As an example of such a technique, there is a laminated body described in Patent Document 1 that can determine authenticity. This laminated body includes a first layer printed with an uneven pattern having an ink height using ink having a hue similar to the hue of the base material or transparent ink, a second layer made of an adhesive, and a light transmitting property. It is formed by sequentially laminating a third layer printed with a line pattern or a dot pattern on a substrate. Easy forgery is prevented by making the concavo-convex pattern visible or impossible depending on the observation direction. However, the purpose of use of such a laminate is limited, and it takes time and money to produce the laminate.

  As another example of the forgery prevention technique, Patent Document 2 describes a technique for preventing forgery or alteration of a packaging material or the like. This is a technique for preventing counterfeiting by printing a fine pattern or the like on the surface of a packaging material or a label using flexographic printing having the advantages of low cost and excellent operability. Although this is a technique that can be easily realized at a relatively low cost, it is characterized only by the fact that the pattern is finely formed, and a sufficient anti-counterfeiting effect cannot be obtained.

JP 2003-305794 A JP 2004-90421 A

  In order to obtain a high anti-counterfeiting effect in a printed matter, not only the above-described conventional example, there is a tendency that it is necessary to perform printing with a complicated configuration, but there is a problem that labor and cost are increased accordingly. Therefore, the problem to be solved by the present invention is to provide a printed matter having a high anti-counterfeit effect at a low cost despite a relatively simple configuration.

  The printed matter according to the present invention, which has been made to solve the above-mentioned problems, includes a base material, a base layer formed by printing arbitrary characters or designs on the base material with colored ink, and the base layer. The concavo-convex pattern is formed by printing with a transparent ink, and the surface of the concavo-convex pattern comprises a transparent layer having concavo-convex lines.

  According to the printed matter according to the present invention, a concavo-convex pattern is formed on the transparent layer formed on the surface of the underlayer on which characters, designs, etc. are printed, and fine concavo-convex lines are formed on the surface of the concavo-convex pattern. Therefore, the glossiness of the transparent layer slightly changes depending on the viewing angle. This glossiness adds a sense of luxury and interest, and the presence of the transparent layer protects the surface of the underlayer. Since the transparent layer is made of transparent ink, it is possible to reliably visually recognize characters, designs, and the like printed on the base layer. Such a transparent layer cannot be reproduced even if it is copied, so it is difficult to forge. On the other hand, the structure is a two-layer structure of a base layer and a transparent layer formed by ordinary printing, so if it has appropriate equipment, the production is extremely simple and the production cost can be kept very low. it can. If flexographic printing is performed using an ultraviolet curable ink, it is possible to perform manufacturing in a batch of steps by in-line processing, and an industrially sufficient manufacturing speed can be obtained.

  As shown in FIG. 1 which is a cross-sectional view, the printed material according to the present invention is formed by printing the base layer 20 on the surface of the substrate 10 and further printing the transparent layer 30 on the surface. The substrate 10 may be formed from a plurality of layers.

  The underlayer 20 is formed by printing arbitrary characters and figures on the surface of the substrate 10 with colored ink. The type of the colored ink is not particularly limited, but an ultraviolet curable ink (UV ink) can be suitably used to shorten the curing time. In order to obtain sufficient glossiness due to the uneven lines provided on the transparent layer 30 described later, it is desirable to use glossy ink as much as possible, and the area of a uniform color portion (so-called solid) is as wide as possible. Better. Since the transparent layer 30 is formed on the surface of the underlayer 20, it is desirable that the surface of the underlayer 20 be a uniform surface with no unevenness as much as possible. It is better to print with colored ink. In addition, when the substrate 10 is made of a material such as paper, the ink is absorbed and the glossiness may be lowered. In order to prevent this, the base layer 20 has a predetermined thickness. Thus, the amount of ink may be adjusted. When using a color with high brightness such as white, it is desirable to use pearl ink because the uneven lines are not noticeable and the glossiness is lowered.

  The transparent layer 30 is formed by further printing a transparent ink on the surface of the foundation layer 20. The transparent ink is printed so as to have a predetermined thickness, and an irregular pattern having an arbitrary shape is formed. The height of the convex part 31 and the recessed part 32 can be set arbitrarily. As the transparent ink, an ink having a high light transmittance as much as possible is generally used. However, even if a light color ink having a light transmittance and capable of visually recognizing characters and patterns printed on the underlayer 20 is used. I do not care. Since the transparent ink is cured by irradiation with ultraviolet rays by using the UV ink in the same manner as the colored ink, the time required for production can be shortened.

  Further, uneven lines that are fine parallel line patterns are formed on the surface of the transparent layer 30. The uneven lines do not need to cover the entire surface of the transparent layer 30, and a smooth portion may be left without forming the uneven lines in part. Since the glossiness changes when the interval between the uneven lines changes, the interval may be set appropriately. However, according to the experiment conducted by the inventor, the visibility of the glossiness is about 200 to 400 lpi. High and suitable. The direction of the concavo-convex line may be a specific direction, but if the concavo-convex line is formed so as to have various directions according to the concavo-convex pattern, etc. Since the gloss of the line changes in various ways, the effect of preventing counterfeiting can be further enhanced, and an interest can be added.

  Although various printing methods can be used as a printing method for forming a printed matter according to the present invention, it is desirable that the underlayer 20 be formed to have a predetermined thickness in order to prevent a decrease in glossiness. Since the transparent layer 30 needs to form a three-dimensional concavo-convex pattern, flexographic printing, silk screen printing, or the like that can be printed so as to deposit ink is suitable. In the present invention, in-line processing is possible, and flexographic printing with a higher printing speed is more preferable. A schematic diagram of a part of a flexographic printing press that can be used in the present invention is shown in FIG. FIG. 4 shows the three processes of the underlayer pattern printing process 40a, the underlayer background printing process 40b, and the transparent layer printing process 40c, but it is of course possible to provide more processes. Only the underlayer pattern printing step 40a will be described here. The UV ink stored in the ink pan 41 is picked up by the anilox roll 42, adjusted to a constant amount, adhered to the surface of the plate 43, and printed on the surface of the substrate 10 (or each layer) fed at a constant speed in the direction of the arrow. The By irradiating the ultraviolet lamp 50, the ink is immediately cured, and the process can proceed to the next step 40b. In the case of performing flexographic printing, it is preferable to use an anilox roll having a line number of 100 to 400 in order to make the amount of ink supplied, that is, the thickness of the underlayer and the transparent layer sufficient. .

  Conventional plates can be used, but if a plate is made by molding a resin plate or rubber plate by laser processing, a fine shape can be restored. In addition, there is a merit that it is pollution-free because it does not use chemicals.

  Hereinafter, an embodiment of a printed matter according to the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 is a cross-sectional view taken along line AA in FIGS.

  A flexographic printing machine was used for printing. An underlayer 20 was formed by printing a pattern 21 with UV colored ink and a background 22 other than the pattern 21 with UV pearl white on the surface of the substrate 10 made of paper (FIG. 3 (a)). The ink was immediately cured by irradiating the underlayer 20 with ultraviolet rays.

  Subsequently, as shown in FIG. 3B, a transparent layer 30 was formed by printing a UV transparent ink on the surface of the underlayer 20. The transparent layer 30 was formed with a concavo-convex pattern in which the convex portions consisted of a plurality of stars. By irradiating the transparent layer 30 with ultraviolet rays, the ink was immediately cured to obtain a printed matter 1. On the surface of the transparent layer 30, the concave and convex lines are vertically formed in the concave portions 32, the convex and concave lines that are inclined by 45 ° are arranged in a plurality of stars 31 a that are alternately arranged inside, and the other plural star shapes 31 b are arranged in the other stars 31 b. A plurality of uneven lines inclined by −45 ° are formed, and a plurality of star shapes 31c appropriately arranged around the periphery are flat surfaces on which no lines are formed. In this way, a star shape is formed by the concavo-convex pattern, and the surface of the concavo-convex line having a plurality of directions is combined with a flat surface, so that when the light incident on and reflected from the concavo-convex line is observed, the glossiness is increased. It changes in various ways and brings out a sense of luxury and style.

  Although the transparent layer 30 has the above-described pattern and glossiness, it has sufficient light transmissivity, so that the pattern 21 printed on the underlayer 20 is clearly transmitted through the transparent layer 30. (FIG. 3 (c)).

  It goes without saying that the printed matter according to the present invention is not limited to the above-described embodiment, and can be changed as appropriate. By combining various concavo-convex patterns formed on the transparent layer and the directions of the concavo-convex lines, a printed matter having a transparent layer with a wide variety of shapes can be obtained. Further, the uneven line is not limited to a straight line but may be a curved line.

The printed matter of the present invention is applicable not only to valuable printed matter such as gold vouchers and admission tickets to prevent counterfeiting and duplication, but also to various printed matter such as various cards and business cards for the purpose of imparting a high-class feeling and appearance to the printed matter. can do.

Sectional drawing of the printed matter which concerns on this invention. Sectional drawing of the printed matter which concerns on one Example of this invention. The top view of (a) foundation layer (b) transparent layer (c) whole of the printed matter which concerns on one Example of this invention. 1 is a schematic diagram of a flexographic printing machine according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Printed material 10 ... Base material 20 ... Underlayer 21 ... Pattern 30 ... Transparent layer 31 ... Convex part 32 ... Concave part 41 ... Ink pan 42 ... Anilox roll 43 ... Plate 44 ... Impression cylinder 50 ... Ultraviolet lamp

Claims (3)

A substrate;
An underlayer formed by printing arbitrary characters and designs with colored ink on a substrate;
Formed by printing a concavo-convex pattern on the underlayer with a transparent ink, and a transparent layer having concavo-convex lines on at least a part of the surface of the concavo-convex pattern;
Printed matter characterized by comprising.   The printed matter according to claim 1, wherein the underlayer and the transparent layer are formed by flexographic printing. By flexographic printing
Print and form a base layer using colored ink on any character or design on the substrate,
A method for forming a printed matter, comprising: forming a concavo-convex pattern having concavo-convex lines on at least a part of the surface of the underlayer using a transparent ink.

Images