JP2005262771A - Printed matter, and its producing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To produce a printed matter which is excellent in design property, and a forgery produced by color copying or the like is easily determined to be a forgery. <P>SOLUTION: On the same surface of a base paper, at least a first print area and a second print area which envelops the first print area, and is constituted of a pattern containing a picture are formed. The first print area is printed with an ink which changes into different colors depending on observation angles. The second print area is printed with a ink which conceals the first print area. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a printed matter that should be prevented from forgery, such as gift certificates, securities, certificates, and important documents, and a general printed matter that requires designability, and a method for producing the same.

In recent years, various techniques have been applied to protect cash vouchers and various certificates from counterfeiting.
Among them, a technique using pearl ink, which has relatively low material costs and printing costs, has begun to be used.
The anti-counterfeit technology using pearl ink utilizes the feature that the reflected light of the pigment that multi-reflects the light contained in the ink looks different colors depending on the angle.
In producing a printed material using pearl ink, printing is performed by a method such as coating, screen printing, intaglio printing, offset printing, letterpress printing, or the like.

However, printing by the above-described methods such as coating, screen printing, and intaglio printing has the following problems.
For example, a pattern cannot be printed by coating.
Further, fine pattern printing by screen printing has a low printing durability and is not suitable for mass production.
Further, intaglio printing requires a cost for plate production, and does not increase the speed for drying the printed ink or printed matter, which increases the printing unit price.
Further, the method using offset printing and letterpress printing prints a large amount of ink as compared with normal printing conditions, so that it is impossible to print a fine pattern.
Thus, a printed matter using pearl ink that can be manufactured at low cost and is suitable for relatively small-scale production and a technique for producing the same are disclosed (for example, see Patent Document 1).

JP 2000-6564 A

In the disclosed technique, the coating material containing a pearl pigment is coated to reduce the cost, and the design property is imparted by partially concealing the pearl paint forming portion coated in a stripe shape.
However, since the pearl-colored portion formed in a stripe shape meanders, the relative position with the partially formed concealed portion changes, which is not suitable as a technique used for cash vouchers, certificates, and the like.

  In order to solve the above-mentioned problem, the invention according to claim 1 of the printed matter of the present invention includes a pattern including at least a first printing area and a first printing area on the same surface of the base paper and including a design. The second printing area is formed, and the first printing area is printed with ink that changes to a different color depending on the viewing angle, and the second printing area hides the first printing area. Is printed.

  The invention according to claim 2 is the invention according to claim 1, wherein the first printing area is printed with pearl ink, and the second printing area is printed with ink mainly composed of a white pigment. It is characterized by this.

  The invention according to claim 3 is characterized in that, in the invention according to claims 1-2, the second print area is printed in a color in which the color of the base paper and the diffuse reflection color are the same. To do.

  Moreover, the method for producing a printed matter according to claim 4 is the method for producing a printed matter according to any one of claims 1 to 3, wherein the first printed region is formed on the surface of the base paper, A design in which a second print area is formed from the top of the first print area with a print color in which the color of the base paper and the diffuse reflection color are the same, and the first print area is displayed inside the second print area. Is formed.

1) As in the first aspect of the present invention, at least a first print area and a second print area that includes the first print area and includes a pattern on the same surface of the base paper. The first printed area is printed with an ink that changes to a different color depending on the viewing angle, and the second printed area is printed with an ink that hides the first printed area. It is possible to produce a printed matter that is excellent in that it is easily determined to be counterfeit when copied by color copy or the like.
2) Further, as described in claim 2, in the invention according to claim 1, the first printing area is printed with pearl ink, and the second printing area is printed with ink mainly composed of a white pigment. As a result, even if the pearl ink printing portion has a simple pattern, the pearl ink printing portion is patterned by the process ink, so that it is possible to produce an inexpensive printed matter with excellent design.
3) Further, as described in claim 3, in the printed matter according to claims 1 and 2, the second print area is printed with a color in which the color of the base paper and the diffuse reflection color are the same. The first print area can be substantially patterned.
4) In addition, as described in claim 4, the printed matter manufacturing method according to any one of claims 1 to 3, wherein a first printing region is formed on a surface of a base paper, A second print area is formed from the top of the print area with a print color in which the base paper color and the diffuse reflection color are the same, and a design displayed in the first print area is formed inside the second print area. As a result, a fine pattern of pearl ink can be effectively formed.

Hereinafter, with reference to the drawings, a printed material and a printed material manufacturing method according to an embodiment of the present invention will be described.
FIG. 1 is a diagram for explaining an example of a printed matter of the present invention, FIG. 2 is a diagram for explaining a first print area and a second print area, and FIG. 3 is an AA of FIG. FIG. 4 is a sectional view of a line, FIG. 4 is a diagram for explaining the problems of the prior art when the first printing region is formed by coating, and FIG. 5 is a diagram illustrating the case where the present invention is applied to FIG. It is a figure to do.

With reference to FIG. 1, an example of the printed material of the present invention will be described.
As shown in FIG. 1, the first print area 11 is printed on the gift certificate 1 in a pattern as indicated by a dotted line.
A second print area (hereinafter referred to as a second pattern) 12 is printed so as to cover the first print area (hereinafter referred to as a first pattern). The “ribbon” -like pattern, which is the inner part of the second pattern 12 formed inside the first pattern, is displayed with a solid line for easy understanding, but actually forms a colorless boundary. .
Although the outer boundary of the second pattern is not shown, the outer boundary of the first pattern is included, and the diffuse reflection color that is the same as the surface of the base paper of the gift certificate 1 is formed.
In the gift certificate, for example, “gift certificate”, “100,000 yen ticket”, etc. Although not displayed, “print background pattern” which is a part of the background pattern, etc. 13) is printed.
When the third pattern such as the tint block is printed so as to cover the periphery of the second pattern, the boundary between the base paper and the second pattern becomes more difficult to understand, which is more effective.

The first pattern and the second pattern will be described in more detail with reference to FIG.
When the upper right second pattern of the gift certificate of FIG. 1 is displayed so as to be visible, it is as shown in FIG.
First, a first pattern 11 is printed on the surface of a base paper (not shown) as shown in FIG. The second pattern 12 as shown in FIG. B is printed so as to cover the printed first pattern.
As shown in FIG. B, the second pattern 12 is composed of an outer boundary 12-1 and an inner pattern 12-2 that forms a symbol. The printing ink constituting the second pattern is not formed inside the inner pattern 12-2, but is formed so that the printing ink of the first pattern 11 is exposed.

With reference to FIG. 3, the AA line cross section of FIG. 2 is demonstrated.
First, the first pattern 11 is printed on one side of the base paper 10 of the gift certificate 1, for example, high-quality paper, coated paper, Japanese paper, and the like, and printing ink of the first pattern is formed. Next, the 2nd pattern 12 is printed so that the 1st pattern 11 may be covered, and printing ink of the 2nd pattern is formed.
In the portion of the pattern 12-2 inside the second pattern 12 described with reference to FIG. 2, the printing ink is not formed, and the printing ink of the first pattern 11 is exposed.

Here, pearl ink will be described as an example of ink that forms the first pattern.
Pearl ink is made by dissolving transparent pigments with pearl sword fish, guanine crystals obtained by producing freshwater fish scales, and inorganic pigments called pearl pigments made from natural mica and titanium oxide. This ink has printability.
The pearl pigment includes a silver type, an iris color type, and a coloring type.
The silver type is silver white pearl, which is reproduced by the difference in titanium oxide coverage and particle size. The iris color type appears to be an iris color due to light interference, and is reproduced by the film thickness of the titanium oxide layer. The coloring type is a coating of titanium oxide and iron oxide.
In addition, the medium is an achromatic ink in which only a varnish or a white pigment is dispersed, and the printed portion is transparent because it does not contain a colored pigment.
Additives can be added to the medium to give it a glossy finish.

Next, process ink will be described as an example of ink that forms the second pattern.
Subtractive primary colors, ie, yellow (yellow), magenta (red), cyan (indigo), and four colors (black) plus one set. The ink that can reproduce the color of the process is called process ink.
Color shading is reproduced by increasing or decreasing halftone dots. Moreover, if these inks are mixed at a predetermined blending ratio, a color reproduced by the overprinting with one color can be obtained.
The second pattern is printed with ink having a high refractive index because it is necessary to hide the edge (outer periphery) of the first pattern. In order to improve the ink concealing property, it is prepared by mixing a white inorganic oxide such as silica, calcium carbonate, titanium oxide or the like with fine particles and mixing with the medium.

First, in FIG. 3, the region of the first pattern 11 is made of pearl ink using any of a coating method such as a roll coater, a gravure printing method, an intaglio printing method, a silk screen printing method, an offset printing method, and a relief printing method. Select a method and print.
When printing with the offset printing method or the relief printing method, the ink is printed with a thick ink thickness in order to enhance the pearl coloring effect.
Next, the area | region of the 2nd pattern 12 is printed by the relief printing system or the offset printing system using the ink with high concealment property.
The color of the ink is adjusted so as not to cause a color difference between the second pattern 12 and the boundary portion of the base paper 10. In printing, the CIELab color system (the color specified by the International Lighting Commission) is used. System) is printed so that ΔE (delta E) falls within 2 or less.
ΔE is a standard for managing two different colors in the CIELab color system, and the difference in ΔE2 is difficult to discriminate the boundary with normal human vision.

With reference to FIGS. 4 and 5, problems of the prior art when the first print area is formed by coating and improvements when the present invention is applied will be described.
4 and 5, the gift certificate 1 is coated with a first pattern parallel to the short side of the gift certificate, that is, in the width direction.
In addition, a second pattern is formed by printing so as to cover part or all of the first pattern.
The second pattern includes an outer boundary line and a symbol boundary line formed on the inner side.
In FIG. 4, the first pattern 110 is formed on the right side of the gift certificate 1 with a predetermined width 1100. Moreover, the symbol 120-2 formed inside the second pattern is formed at a position X from the right end of the gift certificate 1.
The width 1100 of the first pattern shown in FIG. 4 varies in the range of X1 from the right end of the gift certificate 1 because it is coated by the roll coater.
On the other hand, when the width 1200 of the second pattern (120-1 and 120-2) is printed at a fixed position and the width 1100 of the first pattern meanders to the right, the first pattern and the second pattern are maximum. Misregistration regions 100 and 110-1 are generated with a shift of X1.

As shown in FIG. 5, the width of the second pattern is widened by 2X1 + α from the case of FIG. 4 so that the first pattern may be shifted by X1 to the left and right, and the position of the second inner pattern 121-2 is the product. The second pattern is printed by positioning so as to be X from the right end of the ticket.
As a result, the width 1110 of the first pattern that fluctuates is within the range of the width 1210 of the second pattern, and the “registration misalignment regions” 100 and 110-1 shown in FIG.

(Example)
An embodiment of the printed matter of the present invention and a method for creating the printed matter will be described with reference to FIG.
First, a pattern shown in FIG. 2a as a first pattern was printed with pearl ink on one surface of a high quality paper having a weight of 64 g / m ² .
The printing method was a silk screen method, and a plate of 100 lines / inch was used.
The pearl pigment of the pearl ink used for printing used the brand name Iriodin (sold by Merck & Co., Inc.) and was formulated with a medium for silk screen.
On the first pattern sufficiently dried, the second pattern as shown in FIG. 2b was printed with an offset ink with specially improved concealability.
The offset ink with improved hiding property was prepared in an approximate color according to the color of the surface of the fine paper as the base paper based on the ink prepared mainly from the white inorganic oxide.
In printing the second pattern, printing was performed so that ΔE (delta E) in the CIELab color system was within 2.
Furthermore, the 2nd pattern 12-2 was printed by the offset method from the 2nd pattern using the cherry blossom color produced by mixing of process ink.

The printed matter after ink drying is not distinguished because the outer boundary (periphery) of the first pattern printed on the base paper is hidden by the printing ink of the second pattern, and the boundary between the base paper and the second pattern is not determined. Was a level that could not be determined.
By tilting the base paper at a predetermined angle, the design pattern surrounded by the inner boundary line of the second pattern appears to shine like a pattern printed with pearl ink, and when the angle is restored, Only the inner boundary line of the pattern 2 was visually recognized as a printed matter.

    INDUSTRIAL APPLICABILITY The present invention can be used for printed matter such as gift certificates, securities, certificates, and important documents that should be prevented from forgery and general printed matter that requires design correctness.

It is a figure for demonstrating an example of the printed matter of this invention. It is a figure for demonstrating a 1st printing area | region and a 2nd printing area | region. It is the sectional view on the AA line of FIG. FIG. 10 is a diagram for explaining a problem of the related art when the first printing region is formed by coating. FIG. 5 is a diagram for explaining a case where the present invention is applied to FIG. 4.

Explanation of symbols

1 gift certificate 10 base material 11, 110, 111 first pattern 12, 120, 121 second pattern 12-1, 120-1 outer boundary of second pattern 12-2, 120-2 second pattern Inner border (design pattern)
13 Third pattern 14 Normal print position of a pattern which is a part of the second pattern 100, 110-1 Register misregistration area (defective pattern caused by deviation between the first pattern and the second pattern)
1100, 1110 Width of the first pattern 1200, 1210 Width of the second pattern

Claims (4)

On the same surface of the base paper, at least a first print area and a second print area including a pattern that includes the first print area and includes a design are formed,
A printed matter, wherein the first print area is printed with ink that changes to a different color depending on the viewing angle, and the second print area is printed with ink that hides the first print area. The printed matter according to claim 1, wherein the first printing region is printed with pearl ink, and the second printing region is printed with ink mainly composed of a white pigment. 3. The printed matter according to claim 1, wherein the second print region is printed in a color in which the color of the base paper is the same as the diffuse reflection color. 4. A method for producing a printed matter according to any one of claims 1 to 3,
A first print area is formed on the surface of the base paper, and a second print area is formed from the top of the first print area by a print color having the same color of the base paper and the diffuse reflection color, and the second print A printed matter manufacturing method, wherein the design displayed in the first printing area is formed inside the area.

Images