JP2003039806A - Intaglio printed matter having tone reproducibility with semitransparent ink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain intaglio printed matter having tone reproducibility with semitransparent ink which is applied to valuable printed matters to be prevented from being forged or duplicated, such as bank bills, stocks, securities, passports and cards. SOLUTION: An intaglio image constituted of an intaglio printing area of which the width is fixed and the quantity of ink alone is varied is formed on a base. The intaglio image forms an intaglio printed image printed with at least one kind of colored semitransparent ink, and the intaglio printed image has a tone reproduction image of a color following the height of filling of the ink and can be visually identified. The intaglio printed matter having the tone reproducibility with the semitransparent ink is thus obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to gradation reproduction with a semi-transparent ink applied to a valuable printed matter for which it is necessary to prevent counterfeiting and copying of banknotes, stock certificates, securities, passports, cards and the like. The present invention relates to an intaglio printed matter having properties.

[0002]

2. Description of the Related Art Conventionally, valuable printed matter that is required to prevent counterfeiting or alteration of banknotes, stock certificates, securities, etc.
Printed matter using the intaglio printing method has excellent anti-counterfeiting effect and is still used. Furthermore, the thickness of the intaglio line,
By changing the density, gradation and lightness are given to enhance the forgery prevention effect. Further, in the conventional gravure printing method as another printing method, cells have the same area and gradation is expressed by the difference in cell depth.

[0003]

However, in order to obtain a gradation image by the intaglio printing method, it is possible to express only by changing the thickness and density of the intaglio printing line, and by utilizing the height difference of the ink plate. It was difficult to express a gradation image. For this reason, it is difficult to express an excellent gradation in a fine image, and there are restrictions in design. Further, since the gradation image is simple, there is a problem that it is easily reproduced by a copying machine or the like. Further, in the conventional gravure printing method, the cells have the same area and the gradation is expressed by the difference in the cell depth, but it is not possible to obtain a printed material with large ink build-up like the intaglio printing method. There was a problem that it was easy to reproduce.

The inventors of the present invention have formed an intaglio image composed of an intaglio image line having a constant intaglio image line width and varying only the ink deposit, and the intaglio image is at least one kind of colored semi-transparent ink. It was found that an intaglio printed image printed by the above method was formed, and the intaglio printed image could be visually recognized as having a rich gradation reproduction image following the height of the ink heap.

The present invention is intended to solve such a conventional problem, and an excellent gradation image can be expressed only by the difference in height of ink on the intaglio printing line in the intaglio printing method. It is possible to express an excellent gradation image in a fine image / area without being restricted by the design, and it is reproduced as a mixed color of different colors in the part where inks of different colors are overlapped. Since it is difficult to extract the low ink area of the intaglio printing line with the input device, it is difficult to copy it with a printer, etc. Even when copying with a copier, the low ink area of the intaglio printing line can be reproduced. The present invention provides an intaglio printed matter having gradation reproducibility with a semi-transparent ink that is difficult to copy and has an excellent anti-copying effect.

[0006]

The present invention relates to an intaglio printed material in which various intaglio printing lines are formed to form various intaglio printing lines, and an intaglio printing line having a constant intaglio printing line width is formed on a substrate. Forming an intaglio image composed of an intaglio printing line in which only the height changes, the intaglio image forming an intaglio print image printed with at least one kind of colored translucent ink, and the intaglio print image is an ink It is an intaglio printed matter having gradation reproducibility using a semi-transparent ink, which is visually recognizable by having a gradation reproduction image that follows the height of the height.

The present invention relates to an intaglio printed material in which various intaglio printing lines are formed to form an intaglio printing line having a density change,
On the substrate, the intaglio image line width is composed of at least one of continuous change and stepwise change, and, to form an intaglio image image composed of an intaglio image line where the ink deposit changes, the intaglio image is Forming an intaglio print image printed with at least one type of colored semi-transparent ink, and the intaglio print image has a gradation reproduction image that follows the height of the ink heap and is visible. It is an intaglio printed matter having gradation reproducibility with semi-transparent ink.

According to the present invention, a printing pattern of another plate type colored ink is applied to the base of the intaglio image, and the intaglio printing image in the area where the printing pattern and the intaglio printing image are overprinted is at least one of the above Is an intaglio printed matter having gradation reproducibility with a semitransparent ink that can be visually recognized by being reproduced in a mixed color of the color of the colored semitransparent ink and the color of the ink of the printed pattern.

According to the present invention, at least one of the low flat intaglio printing line and the high flat intaglio printing line having a high ink level and the low ink level of the intaglio printing line have a low change in the ink level of the intaglio printing line. It is an intaglio printed matter having gradation reproducibility with a semitransparent ink, characterized in that it is configured to have at least one of a continuous change and a stepwise change from a region to a region where ink is high.

The present invention is an intaglio printed matter having gradation reproducibility with semi-transparent ink, wherein the height of ink of the intaglio printing line is in the range of 0.1 to 150 microns.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an intaglio printed matter using the translucent ink of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged view showing the basic principle of the present invention. FIG. 1A is a printed matter A in which an intaglio image 2 is printed on a printing substrate 1. The intaglio image line 2 has a constant image line width, the ink level changes continuously, and is printed with a semi-transparent ink having a color. When this printed matter A is observed, as shown in FIG. 1B, a portion of the intaglio printing line having a low ink level is reproduced in a low density, and a portion of the intaglio printing line having a high ink level is reproduced in a high density. it can. Therefore, it can be confirmed that the density of the ink changes with the change of the ink level of the intaglio printing line.

By giving an arbitrary drawing line height for each drawing line to an arbitrary line drawing image, an arbitrary pattern can be recognized by a density change. For example, a line drawing is generated from a gradation image of an original portrait, and a line height corresponding to a density change of the original gradation image is given to each line forming the line drawing Even if the width and the image density are uniform, the portrait image can be recognized by the density change depending on the image height.

FIG. 2 shows a case where a semi-transparent ink is printed on a normal printed pattern. FIG. 2A shows a print pattern 3 printed on a base of semitransparent ink. Figure 2 (b)
Is an intaglio line 4 printed with semi-transparent ink with color
Thus, the ink level on the intaglio printing line 4 changes continuously. 2C is a printed matter B in which the intaglio image line 4 of FIG. 2B is overlapped and printed on a partial area of the printed pattern 3 of FIG. 2A.
FIG. The printed pattern 3 is printed with normal ink, and the intaglio image line 4 is printed with semi-transparent ink having color. It can be recognized that the area 5 where the print pattern 3 and the intaglio image line 4 overlap is a color mixture of the color of the print pattern 3 and the color of the semitransparent ink. Therefore, it can be confirmed that in a region where the underlying printed pattern and the semi-transparent ink having the color overlap, the color of the underlying printed pattern and the color of the semi-transparent ink are reproduced.

The underlying printed pattern of the present invention is not particularly limited in terms of design, and may be characters, figures, symbols, a tint block pattern, a color pattern, or the like. Further, the printing pattern of the base of the present invention is not particularly limited in the printing method as well, but the offset printing method, the letterpress printing method or the like with less ink deposit is preferable. In addition, when the underlying printed pattern is printed with colored fluorescent ink and irradiated with energy rays, it is possible to recognize luminescent patterns with different hues in the part that overlaps with the semitransparent intaglio pattern and the part that does not, and the anti-counterfeiting effect Is improved.

Further, by printing the underlying printed pattern of the present invention with the colorless fluorescent ink, the overlapping portion cannot be recognized under natural light, but when irradiated with energy rays, the pattern portion of the colorless fluorescent ink emits light, A luminescent pattern having different hues can be recognized in a portion overlapping the semitransparent intaglio pattern and a portion not overlapping the semitransparent intaglio pattern, and the effect of preventing forgery is improved.

The height of the ink plate of the intaglio printing line of the present invention is not particularly limited as long as there is no problem in print quality, but it is in the range of 0.1 to 150 microns when judged from the quality of the printed matter. Is preferred. Furthermore,
It is preferably in the range of 5 to 100 microns, and can be easily produced by a usual intaglio printing machine.
Further, at least one of the low flat low intaglio printing line and the high flat high intaglio printing line of the ink plate of the intaglio printing line of the present invention, and the ink plate from the low ink printing region of the intaglio printing line A printed matter with more excellent gradation can be produced by configuring the high area to have at least one of continuous change and stepwise change. Furthermore, by providing minute characters in the intaglio image lines of the present invention, the forgery prevention effect is improved.

The semitransparent ink of the present invention may be prepared by mixing a pigment with a transparent intaglio ink. The semi-transparent ink of the present invention includes a generally used UV curable resin, a photopolymerization initiator, an extender pigment, an auxiliary agent (a monomer, a photopolymerization inhibitor, an antifoaming agent, a surfactant, etc.), and a coloring. Composed of a combination of pigments.
For example, in the case of an ultraviolet curable semitransparent intaglio ink, U
X-2301 (Nippon Kayaku Co., Ltd.), PEG400DA
(Nippon Kayaku Co., Ltd.), TO-1343 (Toa Gosei Co., Ltd.) UV curable resin, Irgakia 184
(Ciba Specialty Chemicals Co., Ltd.) and a photopolymerization initiator, and a color pigment such as phthalocyanine blue are mixed. In addition, the semi-transparent ink of the present invention is used in order to add a storage stability of the ink, a polymerization inhibitor such as metquinone, and a hardness as an intaglio ink.
It is desirable to mix an extender pigment such as F. The mixing ratio of the color pigment of the semi-transparent ink of the present invention is 0.01 to 5 parts by weight with respect to 100 parts by weight of the resin in which the ultraviolet curable resin, the photopolymerization initiator, the extender pigment, the auxiliary agent and the like are mixed. Is preferred. Furthermore, in order to produce a printed material with a large amount of ink buildup, 0.01 to 0.5 parts by weight is preferable for 100 parts by weight of the varnish.

The substrate of the present invention may be paper, plastic film, metal, cloth or the like.

The printing method of the present invention is preferably an intaglio printing method, but a gravure printing method or the like can be used as long as it can give unevenness to an image line.

The present invention requires a printing plate surface for making full use of the characteristics of the semitransparent ink, that is, an intaglio plate surface having a shape in which the depth of the intaglio printing line on the plate surface changes continuously / stepwise. Therefore, it is preferable to manufacture the intaglio plate surface using an NC machine tool.

[0021]

The present invention will be described in more detail below with reference to examples, but the contents of the present invention are not limited to the scope of these examples.

(Embodiment 1) FIG. 3 is a diagram showing gradation representation of the intaglio image line of the present invention only by the amount of ink. Figure 3
(A) is a printed matter C in which the intaglio image 6 is printed on the printing substrate 1.
Is. As the intaglio image line 6, a character image 8 (SECURITY PRINTING AGENCY) was circularly arranged on a continuous parallel line 7 having an image line width of 300 μm and a pitch width of 600 μm. The parallel line 7 has a line depth of 10 microns, and the character image 8 has a line depth that is continuously changed from 10 microns to 60 microns. N for the intaglio plate surface using the designed data
It was produced with a C engraving machine. The prepared intaglio printing plate surface was printed with a magenta translucent intaglio ink by an intaglio printing machine to obtain a printed matter C. When this printed matter C is observed, as shown in FIG. 3A, the low ink density portion of the intaglio printing line 6 is recognized as low density, and the high ink density portion of the intaglio printing line 6 is recognized as high density. did it. Therefore, as shown in FIG. 3A, in the parallel lines 7, the character image 8 is reproduced while changing from low density to high density, and the character (SECURITY PRI
NTING AGENCY) was confirmed. 3 (b) is shown in FIG. 3 (a).
FIG.

(Embodiment 2) FIG. 4 shows a printed matter D in which a tint block pattern 9 and a character image 10 are printed on a part of the tint block pattern 9 in an overlapping manner. 6A shows a tint block pattern 9, and FIG. 6B shows a character image 10 (P), in which the depth of line changes continuously from 10 microns to 30 microns.
The copy-forgery-inhibited pattern 9 is made into a printing plate by the PS plate, and the character image
The intaglio plate surface of No. 1 was produced by an NC engraving machine. First, the prepared P
After printing the copy-forgery-inhibited pattern 9 by the offset printing machine with the cyan process ink using the S plate, using the intaglio printing plate surface of the character image 10 and a part of the copy-forgery-inhibited pattern 9 with the magenta translucent intaglio ink with the intaglio printing machine A printed matter D was obtained by printing so that the character image 10 overlaps with the printed image. When this printed matter D was observed, the overlapping area 11 of the tint block pattern 9 and the character image 10 could be recognized as a mixed color of cyan and magenta (purple), as shown in FIG. 6C. Further, in the overlapping region 11, it was possible to recognize dark purple in a region where the ink amount of the character image 10 was high and light purple in a region where the ink amount of the character image 10 was low. Therefore, as shown in FIG. 6C, it was possible to confirm the character image P having a gradation and being rich in color.

Example 3 A tint block pattern was printed with a colorless fluorescent ink in the same manner as in Example 2. Using the intaglio printing plate surface of the character image 10 used in Example 2 on the tint block pattern printed with the colorless fluorescent ink, the magenta translucent intaglio ink was used to overlap the character image on a part of the tint block pattern in the intaglio printing machine. Printing was performed to obtain a printed matter. When this printed matter is irradiated with ultraviolet rays and observed, an area where the tint block pattern and the character image overlap,
It was possible to recognize that the regions that did not overlap emitted light in different colors.

Example 4 A tint block pattern was printed with colored fluorescent ink in the same manner as in Example 2. Using the intaglio printing plate surface of the character image 10 used in Example 2 on the tint block pattern printed with the colored fluorescent ink, the magenta translucent intaglio ink is used so that the letter image overlaps a part of the tint block pattern in the intaglio printing machine. Printing was performed to obtain a printed matter. When this printed matter is irradiated with ultraviolet rays and observed, an area where the tint block pattern and the character image overlap,
It was possible to recognize that the regions that did not overlap emitted light in different colors. Also, in the area where the tint block pattern and the character image overlap, low light emission occurs in the high ink area of the character image,
It was possible to recognize by emitting high light in the area where the ink volume was low.

The embodiment of the present invention has been described above based on the embodiment, but the present invention is not limited to this embodiment and may be within the scope of the technical idea in the claims. Various other embodiments are possible.

[0027]

EFFECTS OF THE INVENTION An intaglio image composed of an intaglio image line having a constant intaglio image line width and a change in ink deposit is formed on a substrate, and the intaglio image is at least one kind of semi-transparent colored material. An intaglio print image printed with ink is formed, and the intaglio print image is reproduced with a low density (light color) in a low ink area and in a high density (dark color) in an intaglio high ink area. Since it is reproduced in color, it is possible to have a gradation reproduction image of a color following the height of the ink, which cannot be obtained in a printed matter intaglio printed with a normal ink.

Further, when the printed pattern and the translucent ink are overprinted on the underlying printed pattern, the area where the printed pattern and the translucent ink overlap becomes a mixed color of the colors of the printed pattern and the color of the translucent ink, which is excellent in color. A printed matter having different gradations can be obtained.

By combining the density change due to the difference in depth of the intaglio printing line printed with the semi-transparent ink according to the present invention with the conventional change of the image line width and the expression by the density of the image line, a more excellent gradation can be obtained. The printed matter can be obtained.

According to the present invention, an excellent gradation image can be expressed only by the height difference of the image lines in the intaglio printing method, and a gradation expression with a heap of ink, which cannot be obtained in the conventional gravure printing method, can be obtained. Therefore, it is possible to express an excellent gradation image in a fine image / area without being restricted by the design, and it becomes difficult to extract a portion of the intaglio printing line where the ink level is low with an image input device such as a scanner. Duplication with a printer or the like becomes difficult, and when copying with a copying machine, it is difficult to reproduce the image line of the portion of the intaglio image line where the ink level is low, and the copy prevention effect can be improved.

[0031]

[Brief description of drawings]

1 is an enlarged view showing the basic principle of the present invention.

FIG. 2 is an enlarged view of a case where a semi-transparent ink is printed on a normal printed pattern of the present invention.

FIG. 3 is a diagram showing gradation representation of an intaglio printing line of the present invention only by the amount of ink.

FIG. 4 is a diagram showing a case where a semitransparent ink is printed on a normal printed pattern of the present invention.

[Explanation of symbols]

1 Printing base material 2, 4, 6 intaglio 3 printed patterns 5 overlapping areas 7, 8 parallel lines 10 character image 9 ground pattern A, B, C, D printed matter

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2C005 HA04 HB02 HB07 HB10 JA09                       JB14 JB15 JB19 KA40 KA57                       LA24                 2H113 AA06 BA03 BC00 CA39 CA40                       CA45 EA06                 3E041 AA01 AA02 BA09 BA15 BB01                       BC06

Claims (5)

[Claims] 1. An intaglio printed material in which various intaglio printing lines are formed to form an intaglio printing line having a change in density, wherein an intaglio printing line on a substrate has a constant width and only the ink deposit changes. To form an intaglio image formed by printing at least one kind of colored semi-transparent ink, and the intaglio print image follows the height of the ink heap. An intaglio printed matter having gradation reproducibility using a semi-transparent ink, which is visually recognizable with a gradation reproduction image. 2. An intaglio printed material in which various intaglio printing lines are formed to form an intaglio printing line having a density change, wherein the intaglio printing line width is at least one of continuous change and stepwise change on a substrate. And forming an intaglio image composed of an intaglio printing line in which the amount of ink changes, the intaglio image forming an intaglio print image printed with at least one type of colored semi-transparent ink, An intaglio printed image having gradation reproducibility using a semi-transparent ink, wherein the intaglio printed image has a gradation reproduction image that follows the height of the ink heap and is visible. 3. An intaglio printed image in an area where the printed pattern and the intaglio printed image are overprinted by applying a printed pattern using another plate-type colored ink to the underlayer of the intaglio image. The intaglio printed matter having gradation reproducibility with the semitransparent ink according to claim 1 or 2, which is visible by being reproduced in a mixed color of the color of the semitransparent ink and the color of the ink of the printed pattern. 4. A change in the ink level of the intaglio printing line,
At least one of a low low flat intaglio printing line and a high flat intaglio printing line of high ink level, and at least one of a continuous change and a stepwise change from a low ink level region of the intaglio printing line to a high ink level region. The intaglio printed matter having gradation reproducibility with the semitransparent ink according to claim 1, 2 or 3, characterized in that the intaglio printed matter is provided with one. 5. The height of the ink plate of the intaglio printing line is
The intaglio printed matter having gradation reproducibility with the semi-transparent ink according to claim 1, which is within a range of 0.1 to 150 microns.