JP5544540B2 - Method for producing latent image intaglio printed matter - Google Patents

Description

  The present invention relates to a method for producing a latent image intaglio printed matter in which a bank image, a passport, a securities, a gift certificate, various certificates, and the like are provided with a latent image to prevent forgery and duplication.

  Conventionally, forgery prevention printed matter such as banknotes, passports, gift certificates, and various certificates has been required to be provided with means for preventing forgery, and various techniques have been disclosed for the forgery prevention technology. For example, anti-counterfeiting technology is provided in the manufacturing process of the paper used as the base material, watermarks or threads, and minute characters or pearl printing that provides anti-counterfeiting technology in the printing process, and further anti-counterfeiting technology in a separate process after the printing process Typical examples are holograms or laser drilling for imparting the above.

  Among these techniques, latent image intaglio printing is one of the anti-counterfeiting techniques that are relatively inexpensive and have high anti-counterfeiting power. The reason for this is that many counterfeiters often produce counterfeit products with a simple output device such as a printer, and therefore can only produce counterfeit products with a low ink film thickness and a two-dimensional configuration. It will be. On the other hand, the latent image intaglio print has a three-dimensional structure because the latent image pattern is formed by regularly arranging raised lines in the vertical and horizontal directions, and it is raised by observing from a specific direction. Further, due to compression and non-compression of the line, a density difference is generated between the vertical line and the horizontal line so that the latent image pattern can be visually recognized. However, as described above, since a counterfeit product manufactured by a printer cannot form a raised line, it is not possible to form a latent image only by copying the genuine product. It can be difficult.

  Specifically, the structure of a general known latent image intaglio print 1 'will be described with reference to the drawings. FIG. 5A shows the configuration of a latent image intaglio printed matter 1 ′ formed by intaglio printing, in which a latent image intaglio pattern is formed on a base material P ′ such as paper. The latent image intaglio print 1 ′ is composed of a latent image area A ′ and a background area B ′, and a plurality of horizontal lines in the latent image area A ′ and a plurality of vertical lines in the background area B ′ are regularly arranged. In addition, it is formed with a lively drawing line. The latent image pattern observed from the latent image intaglio printed matter 1 ′ will be described with reference to FIGS. 5B and 5C. FIG. 5B shows the observation direction with respect to the latent image intaglio print 1 ′. When the latent image intaglio print 1 ′ is observed from directly above as in the observation direction K1 ′, the horizontal and vertical lines are Since the image line portion and the non-image line portion are formed at the same density, the latent image pattern “T” cannot be visually recognized.

  On the other hand, when the latent image intaglio printed matter 1 ′ is observed obliquely as in the observation direction K2 ′, the vertical lines in the latent image area A ′ are parallel to the observation direction as shown in FIG. The density change in the image area does not occur. On the other hand, since the latent image area B ′ is perpendicular to the observation direction, a part of the non-image area is concealed by a raised horizontal line, so that it is visually recognized as a state where the apparent image density is high. . As a result, the latent image “T” composed of the latent image area A ′ can be visually recognized by the density difference between the vertical line and the horizontal line. Various techniques for such latent image intaglio have been disclosed (see, for example, Patent Document 1).

  First, a general method for producing a latent image intaglio print will be described. FIG. 6 is an enlarged view of a part of the vertical line and horizontal line in the latent image intaglio printed matter 1 ′ in FIG. 5. FIG. 6A is an intaglio image line of the intaglio plate surface used for intaglio printing, and FIG. 6B is an enlarged image of the intaglio image line of the intaglio plate in the printed material after intaglio printing using the intaglio plate surface. FIG.

  First, as shown in FIG. 6A, the latent image intaglio printed matter 1 ′ includes a latent image area A ′ and a background area B ′, and the latent image area A ′ includes a plurality of vertical lines T ′ and a background area. A plurality of horizontal lines Y ′ are arranged in B ′. At this time, the line width TW ′ of the vertical line T ′, the line width YW ′ of the horizontal line Y ′, the line pitch TP ′ of the vertical line T ′, and the line pitch YP ′ of the horizontal line Y ′. Are the same. Note that the intaglio plate surface formed to be concave with respect to the plate surface is used for the horizontal line T 'and the vertical line Y'.

  FIG. 6B is an intaglio image line that is intaglio-printed using the intaglio plate surface of FIG. 6A. Normally, the vertical line T ′ and the horizontal line Y ′ are the intaglio plate surface. Reproduced as the same line width as the set value. Specifically, the line width TW ′ of the vertical line T ′ and the line width YW ′ of the horizontal line Y ′ of the intaglio plate surface of FIG. 6A are the intaglio image lines of the printed material of FIG. 6B. Are the same as the line width TW ′ of the vertical line T ′ and the line width YW ′ of the horizontal line Y ′. This configuration is an indispensable requirement for the latent image intaglio because, when the latent image intaglio print 1 ′ is observed from directly above as in the observation direction K1 ′ shown in FIG. By making the line width and pitch of 'and horizontal line Y' the same, the non-image area formed is the same, and as a result, there is no difference in density between vertical line T 'and horizontal line Y'. The latent image pattern “T” cannot be visually recognized.

  Next, problems in manufacturing the latent image intaglio printed matter 1 ′ will be described. As the base material P ′, when the base material itself is hard or a thick material is used, as shown in FIG. 7, the vertical line and horizontal line width of the latent image intaglio image line on the intaglio plate surface, In some cases, the line widths of the vertical and horizontal lines of the latent image intaglio print after intaglio printing are not the same.

  FIG. 7 shows an example in which the line widths of the vertical and horizontal lines of the latent image intaglio printed material obtained by intaglio printing using the intaglio plate surface of FIG. 6A are not the same. As shown in FIG. 7, when the intaglio printing is performed under the condition that the base material itself is hard or thick and the base material itself is not easily deformed as the base material, the vertical line T ′ has the line width TW ′. The line width YW ′ of the horizontal line Y ′ is not the same, and the line width TW ′ of the vertical line T ′ may be narrower than the line width YW ′ of the horizontal line Y ′. is there.

  The reason for this will be described with reference to FIG. FIG. 8 shows a cross-sectional view of the XX portion of the vertical line T ′ among the intaglio image lines in the latent image intaglio print of FIG. 7. As a process for producing the latent image intaglio print, This shows a state in which the ink transferred to the substrate is transferred to the substrate. FIG. 7A is a cross-sectional view of the vertical line T ′ of the latent image intaglio printed matter 1 ′ on the intaglio plate surface E ′, and FIG. 7B is a drawing of the intaglio ink I ′ transferred to the surface of the intaglio plate surface E ′. And the state which wiped off the excess intaglio ink I 'other than a recessed part with the wiping roller is shown. At this time, the intaglio ink I ′ transferred to the concave portion of the vertical line T ′ is also wiped away from the intaglio ink I ′ in the concave portion by the contact and rotation of the wiping roller. As a result, the plate surface of the intaglio plate surface E ′ Therefore, the intaglio ink I ′ remains at a lower position. Furthermore, as shown in FIG. 7 (c), the base plate P 'is placed on the intaglio plate surface E', and the intaglio ink I 'remaining in the recesses is transferred to the base material P' by applying a printing pressure and deforming it. A latent image intaglio print 1 ′ is prepared.

  At this time, for example, when the base material P ′ itself is hard, the deformation of the base material P ′ due to the printing pressure is small, so that the area where the intaglio ink I ′ remaining in the concave portion of the vertical line T ′ contacts the base material P ′. As a result, as shown in FIG. 7, the image of the vertical line T ′ of the intaglio ink I ′ transferred to the substrate P ′ is smaller than the line width TW ′ of the vertical line T ′ on the intaglio plate surface. The line width becomes narrower.

  On the other hand, FIG. 9 is a cross-sectional view of the YY portion of the horizontal line Y ′ in the latent image intaglio printed matter 1 ′ in FIG. 7 and shows a printing method. The intaglio ink I ′ remaining in the recesses of the intaglio plate surface E ′ of the horizontal line Y ′ is transferred to the base material P ′. However, when FIG. 9 and FIG. 8C are compared, the deformation state of the paper P ′ is different. . Note that FIG. 9 is different from FIG. 8C in other lines, but the other configurations are the same.

  This reason is caused by the direction in which the printing pressure of intaglio printing is applied and the image line direction of the latent image intaglio print 1 '. FIG. 10 is a schematic view of an intaglio printing unit in an intaglio printing press. Usually, the intaglio printing part is composed of an impression cylinder R1 and an intaglio cylinder R2, and passes through the substrate P 'between the impression cylinder R1 and the intaglio cylinder R2, and is subjected to intaglio printing by applying a printing pressure. An intaglio plate surface E 'is attached to the intaglio cylinder R2, and an intaglio image line of the latent image intaglio print 1' is formed on the intaglio plate surface E '.

  Further, the direction of the printing pressure applied to the latent image intaglio print 1 ′ is as illustrated, and the printing pressure direction is parallel to the vertical line T ′ of the latent image intaglio print 1 ′. At this time, as shown in FIG. 7C, since the opening of the concave portion of the vertical line T ′ is narrow and the concave and convex portions are regularly formed, the base material P ′ is not easily deformed. . On the other hand, since the horizontal line Y ′ of the latent image intaglio printed matter 1 ′ is a direction perpendicular to the printing pressure direction, as shown in FIG. As a result, the intaglio ink I ′ is easily transferred to the substrate P ′. As a result, as shown in FIG. 6 (b), the vertical line T ′ of the latent image intaglio print 1 ′ is narrower than the image line width of the intaglio plate surface, while the horizontal line Y ′ is the image line of the intaglio plate surface. It becomes the same as the width, and there is a difference in the line width between vertical and horizontal lines.

  When such a printed matter is observed from directly above as in the observation direction K1 ′ in FIG. 5B, the latent image “T” can be visually recognized due to the difference in the image line width. There was a problem of not functioning as an image intaglio.

Japanese Patent Publication No. 56-19273

  The present invention relates to a method for producing a latent image intaglio print, and eliminates the difference in the line width between the vertical and horizontal lines of the latent image intaglio image line after intaglio printing.

  In the method for producing a latent image intaglio print of the present invention, either one of a latent image region and a background region is formed by a first image line regularly arranged at a predetermined pitch along a first direction on a substrate. And the latent image intaglio in which the other of the latent image area and the background area is formed by the second image line regularly arranged at the same pitch as the predetermined pitch along the second direction different from the first direction. An intaglio plate producing means for producing an intaglio plate which is a method for producing a printed material, wherein an intaglio plate surface formed with an image line width of either the first image line or the second image line being thicker than the other image line width; A latent image intaglio printed material production method comprising an intaglio printing means for performing intaglio printing on a base material by an intaglio printing machine using an intaglio plate surface produced by an intaglio plate surface production means.

  Further, in the method for producing a latent image intaglio printed matter of the present invention, an image line formed as an image line thicker than any one of the image line widths by the intaglio plate surface producing means is formed in the substrate transport direction in the intaglio printing press. The method is a method for producing a latent image intaglio printed material having an image line.

  In addition, the method for producing a latent image intaglio print of the present invention is characterized in that the difference in image line width between the first image line and the second image line on the intaglio surface is 0.005 to 0.03 mm. .

  The second direction in the method for producing a latent image intaglio print of the present invention is a direction of 70 to 110 ° with respect to the first direction.

  The method for producing a latent image intaglio print of the present invention is characterized in that the image line widths of the first image line and the second image line are 0.1 to 0.16 mm.

  By using the method for producing a latent image intaglio print of the present invention, even if the base material itself is hard or the base material itself is thick as described in the background art above, the vertical and horizontal lines of the latent image intaglio The line widths of the lines are the same, and the latent image is not visible when the latent image intaglio is observed from directly above, but only when the latent image is observed from a specific direction. An image intaglio print can be produced.

The schematic diagram which shows an example of the latent image intaglio printed matter produced by the preparation method of this invention. The schematic diagram which shows an example of the latent image intaglio printed matter produced by the preparation method of this invention. The figure which shows the preparation methods of the latent image intaglio printed matter of this invention. The figure which shows the preparation methods of the latent image intaglio printed matter of this invention. The schematic diagram of the conventional latent image intaglio printed matter. The schematic diagram of the conventional latent image intaglio printed matter. The schematic diagram of the conventional latent image intaglio printed matter. The figure which shows the preparation methods of the conventional latent image intaglio printed matter. The figure which shows the preparation methods of the conventional latent image intaglio printed matter. The figure which shows the state in which a latent image intaglio printed matter is printed by the intaglio printing press.

  Embodiments for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments to be described below, and includes various other embodiments within the scope of the technical idea described in the claims.

  The present invention is a case where a latent image intaglio printed matter composed of vertical and horizontal lines is prepared, and the substrate is sufficiently formed by the printing pressure during intaglio printing, such as when the substrate itself is hard or thick. If the line widths of the vertical and horizontal lines are not the same in the printed material, the image of the vertical and horizontal lines in the latent image intaglio printed material can be obtained by using the production method of the present invention. It is characterized by the same line width.

  In addition, as an example of the base material itself being hard, if the paper is manufactured, the paper is pressed with a press roller or the like at the time of paper manufacture, and the paper in which the fibers in the paper are crushed, the paper whose surface is coated with a calendar roller, etc. is there. On the other hand, as a substrate other than paper, there is a PET film or a PVC film. Moreover, as an example with a thick base material, it is a thickness of 2 mm or more, which is twice or more the thickness of about 1 mm used as a general base plate for intaglio printing.

  Also, if the line widths of the vertical and horizontal lines are not the same, the printing pressure of the intaglio printing machine is weak and the base material is not deformed, or the wiping pressure of the intaglio printing machine is strong and the plate surface In some cases, the intaglio ink transferred onto the ink may be wiped off excessively by a wiping device. Accordingly, the line widths of the vertical and horizontal lines may not be the same due to various factors such as the base material, ink, machine, and printing conditions used for intaglio printing.

  First, the structure of the latent image intaglio printed matter produced by the production method of the present invention will be described with reference to FIG. 1, but the latent image intaglio printed matter of FIG. 4 described in the background art and the substrate itself are not easily deformed. Since the configuration other than using the material is the same, the description thereof is omitted. FIG. 2 is an enlarged view of a part of the latent image intaglio print 1 shown in FIG. 2A is a latent image intaglio image line on the intaglio plate surface used for intaglio printing, and FIG. 2B is an enlarged view of the latent image intaglio image line in the latent image intaglio print 1 printed using the intaglio plate surface. FIG.

  First, as shown in FIG. 2A, the latent image intaglio printed matter 1 of the present invention includes a latent image area A and a background area B. The latent image area A is formed by vertical lines T, and the background area B Is formed by horizontal lines Y. At this time, the line width tW of the vertical line T is provided wider than the line width YW of the horizontal line Y. The line pitch TP of the vertical line T and the line pitch YP of the line Y are the same. In addition, for the vertical line T and the horizontal line Y, an intaglio plate surface formed to be recessed with respect to the plate surface is used.

  For example, the line width tW of the vertical line T and the line width YW of the horizontal line Y are in the range of 0.08 to 0.2 mm, preferably 0.1 to 0.16 mm, and the line width tW. And the image line width YW are in the range of 0.005 to 0.05 mm, preferably 0.005 to 0.03 mm. Further, the line pitch TP of the vertical line T and the line pitch YP of the horizontal line Y are in the range of 0.2 mm to 0.3 mm, and preferably 0.1 to 0.15 mm. Further, the vertical line T, the horizontal line Y, and the image line depth are preferably in the range of 0.02 to 0.15 mm, and preferably 0.05 to 0.08 mm. Further, the angle of the horizontal line Y with respect to the vertical line T is preferably in the range of 45 to 135 degrees and 70 to 110 degrees.

  FIG. 2B is an intaglio image line obtained by performing intaglio printing using the intaglio plate surface of FIG. Specifically, the line width tW of the vertical line T of the intaglio plate surface in FIG. 2A is the line width TW of the vertical line T of the printed material in FIG. Printed thinner than the width. On the other hand, the line width YW of the horizontal line Y of the intaglio plate surface of FIG. 2 (a) is the same as the line width YW of the horizontal line Y of the printed matter in FIG. 2 (b). At this time, the line width TW of the vertical line T and the line width YW of the horizontal line Y in the printed matter of FIG. 2B are the same. Further, the line pitch YP of the horizontal line Y and the line pitch TP of the vertical line T of the intaglio plate surface of FIG. 2A are the line pitch YP of the horizontal line Y of the printed matter in FIG. The vertical pitch of the vertical lines T is equal to the line pitch TP.

  Next, the reason why the line width TW of the vertical line T and the line width YW of the horizontal line Y are the same will be described. FIG. 3 is a cross-sectional view of the vertical line T of the intaglio image line of the latent image intaglio printed matter 1 in FIG. 2 and shows a production method thereof. For the same reason, only different parts will be described. First, FIG. 3A is a cross-sectional view of the vertical line T of the latent image intaglio printed matter 1 on the intaglio surface E, and the line width tW of the vertical line T is equal to that of the vertical line T ′ of FIG. It is wider than the line width TW ′. FIG. 3C shows a latent image intaglio printed matter by applying printing pressure to the base material P and deforming the base material itself to transfer the intaglio ink I remaining in the concave portions of the intaglio surface to the base material P. Is made.

  At this time, in FIG. 3C, since the wide line width tW of the vertical line T is provided wide, the deformation of the base material P due to the printing pressure increases, and the area in contact with the remaining intaglio ink I increases. Therefore, as a result, the line width of the vertical line T is thicker than that in FIG. On the other hand, since FIG. 4 shows the wide horizontal line Y having a wide opening, the deformation of the base material when the printing pressure is applied is large, so that the line width YW of the horizontal line Y is the same for the intaglio plate surface and the printed matter. It becomes.

  As described above, by producing the latent image intaglio printed matter according to the configuration of the present invention, the vertical line T and the horizontal line Y of the latent image intaglio printed matter 1 become the same even under various conditions. Since the latent image intaglio printed matter 1 is observed from directly above as in the observation direction K1 of 1 (b), there is no difference in density between the vertical and horizontal lines in the latent image intaglio printed matter 1, so that the latent image The image “T” is not visually recognized. On the other hand, when the latent image intaglio printed matter 1 is observed obliquely in the observation direction K2, the latent image “T” can be visually recognized as shown in FIG.

  The latent image intaglio printed matter 1 in FIG. 1 has been described with an example in which the latent image area A is configured by the vertical lines of the latent image area A and the horizontal lines of the background area B. Even if it is the reverse structure which forms in a vertical line, it has the same effect. Therefore, the latent image intaglio printed matter produced by the production method of the present invention is designed so that, in the image line design of the intaglio plate surface, the other line is larger than the line width of one line among the vertical and horizontal lines of the latent image intaglio. The width of each line may be increased, and the vertical line and the horizontal line of the latent image intaglio printed material after intaglio printing may be configured to be the same.

  A specific configuration of the latent image intaglio printed matter of the present invention will be described using Example 1. In Example 1, in order to form a latent image pattern with swelled vertical and horizontal lines, a latent image intaglio printed matter was produced by an intaglio printing machine. First, an intaglio plate surface for forming a latent image intaglio was produced in the shape shown in FIG.

  As the base material, 0.9 mm thick paper on which a white watermark pattern was formed was used. As shown in FIG. 2 (a), the image line design of the intaglio plate surface of the latent image intaglio print is as follows. The image line width tP of the vertical line T in the latent image area A is 0.16 mm, and the image line pitch TP is 0.25 mm. did. On the other hand, the line width YW of the horizontal line Y in the background region B was 0.15 mm, and the line pitch TP was 0.25 mm. The angle of the horizontal line Y with respect to the vertical line T was 90 degrees.

  Next, a latent image intaglio printed matter 1 was produced by an intaglio printing machine using the intaglio plate surface produced in FIG. As shown in FIG. 2B, the latent image intaglio image line of the above-described latent image intaglio printed matter 1 has an image line width tP of the vertical line T of the latent image region A of 0.15 mm and an image line pitch TP of 0. .25 mm. On the other hand, the line width YW of the horizontal line Y in the background region B was 0.15 mm, and the line pitch TP was 0.25 mm. As a result, in the latent image intaglio printed matter of Example 1, the vertical and horizontal lines of the latent image intaglio were the same.

  When the latent image intaglio print 1 was observed from directly above, the latent image area A and the background area B were visually recognized as a flat pattern having the same density. In addition, when the latent image intaglio printed material 1 is tilted and observed, the apparent line density is increased by hiding part of the non-image area due to the image line height of the horizontal line Y. The latent image area A, that is, the area where the vertical lines are formed, is not affected by the line density of the non-image area even when the latent image intaglio printed material 1 is tilted and observed. A difference in density occurred, and only the latent image area could be visually recognized as a light density area.

1, 1 'Latent image intaglio print P, P' Substrate A, A 'Latent image area B, B' Background area K1, K1 'Observation direction from directly above K2, K2' Observation direction from diagonal T, T ' Vertical line Y, Y 'Horizontal line TW, TW', tW Line width of vertical line TW, TW 'Line width of vertical line YW, YW' Line width of horizontal line TP, TP 'Vertical Line stroke line YP, YP 'Horizontal line stroke pitch E, E' Intaglio plate surface I, I 'Intaglio ink R1 Impression cylinder R2 Intaglio cylinder

Claims (2)

A first image line regularly arranged at a predetermined pitch along the first direction on the base material forms one of the latent image region and the background region, and a second different from the first direction. A method for producing a latent image intaglio print in which the other of the latent image area and the background area is formed by second image lines regularly arranged at the same pitch as the predetermined pitch along a direction. There,
The first image line and the image line width of the second image line are formed in the range of 0.1 to 0.16 mm along the conveying direction of the base material in the intaglio printing press. One of the image line and the second image line is formed as a thick image line width, the other is formed as a thin image line width, and the image lines of the first image line and the second image line An intaglio plate making means for producing an intaglio plate surface formed with a width difference of 0.005 to 0.03 mm ;
Wherein the intaglio printing plate produced the intaglio printing press using said intaglio printing plate made by the means, methods for manufacturing a latent image intaglio printed materials, comprising the intaglio printing unit performs intaglio printing on the substrate.   2. The method for producing a latent image intaglio print according to claim 1, wherein the second direction is a direction of 70 to 110 ° with respect to the first direction.

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