JP2008142951A - Printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide printed matter which is excellent in the concealability of an image before the surface is scoured with a coin, and also enables clear emergence of the image after the surface is scoured with the coin. <P>SOLUTION: Non-coated paper is used as a base material 10 to be subjected to printing and a base ink layer 12 is formed by printing on the whole in a prescribed area of the surface 16 to be printed of this uncoated paper, by using ink containing at least one kind of white pigment 20 selected from a group consisting of a titanium oxide, a barium sulfate and a calcium carbonate, while an overcoat ink layer 14 is formed partially by printing on the base ink layer 12 by using colorless ink. The prescribed image is constituted of a formed or unformed portion of the overcoat ink layer 14 on the base ink layer 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a printed matter, and in particular, an ink layer constituting a predetermined image is printed and formed on the surface of paper, and the surface composed of the ink layer appears by rubbing the surface with a coin. The present invention relates to the improvement of the printed matter.

  Conventionally, a lower ink layer constituting various images such as letters, numbers, patterns, and patterns has been printed on the surface of a substrate such as paper or synthetic resin, and on the lower ink layer, Colored upper ink layer that can be masked is printed and laminated, and the upper ink layer is scraped off with coins, nails, etc., so that the image composed of the lower ink layer appears The so-called scratch-type printed matter is suitably used for various lotteries, game cards, and the like.

  In addition, as a kind of such a scratch-type printed matter, the surface of the base material includes, for example, a hard material having a hardness higher than the metal constituting the coin, such as titanium oxide, and the same color as the base material surface, There is known one in which an ink layer constituting a predetermined image is formed by printing (see, for example, Patent Document 1 below). In this printed matter, when the printed surface is rubbed with a coin, the metal of the coin is scraped off by the hard material in the ink layer formed on the substrate surface, and the ink layer is colored by the scraped metal. Or the color is changed, so that an image composed of such an ink layer is made to appear.

  In such a printed matter, unlike the printed matter in which the upper image layer formed so as to be laminated on the lower ink layer constituting the predetermined image is scraped and the predetermined image appears. Although there is an advantage that dust scraps can be advantageously avoided due to the scraped ink layer portion, the substrate surface can be viewed from various angles without rubbing the substrate surface with coins. There has been a drawback that an image composed of the ink layer is visually recognized due to a difference in gloss between the surface and the ink layer.

  Therefore, on the surface of the base material, a white solid printing layer is printed and formed with a white printing ink containing a white pigment made of titanium oxide or the like, and a white pigment made of titanium oxide or the like is formed on the white solid printing layer. The overprint layer by the white overprint varnish that is contained in an amount smaller than the content in the white printing ink is printed to form a predetermined image (confidential information data) in a pattern or pattern, and the printing surface is By rubbing with coins, only the white solid print layer portion corresponding to the overprint layer removal pattern or the white solid print layer portion corresponding to the portion other than the pattern portion of the overprint layer is colored, and these removal patterns Alternatively, a printed material in which an image composed of a pattern appears has recently been proposed (for example, Serial see Patent Document 2).

  In such a printed matter, an overprint layer of a white overprint varnish of the same color as that of the white solid print layer is laminated with a predetermined cut pattern or pattern, so that the overprint layer can be removed. It is difficult to discriminate between a pattern or an image composed of a pattern and a white solid print layer, and the concealment of the image is improved.

  However, when the present inventor examined the image concealment in a conventional printed matter having two ink layers of the white solid print layer and the white overprint layer, the content of the white pigment in the white solid print layer There is a slight difference in hue and light reflectance between the white solid print layer and the white overprint layer based on the difference between the white pigment content in the white overprint layer and the white overprint layer. Therefore, it has been recognized that an image constituted by a blank pattern or a pattern of an overprint layer and a white solid print layer can be distinguished by reflection of light or the like. As a result, it is difficult to say that such a conventional printed matter is difficult to discriminate between an image constituted by a blank pattern or a pattern of an overprint layer and a white solid print layer. It turns out that there is room for improvement.

  For this reason, as a result of various studies to improve the concealment of the image, the present inventor has obtained a predetermined image on a colorless overcoat ink layer partially formed on the base ink layer containing a white pigment. In addition, the surface of the base ink layer is formed into a concavo-convex shape by printing the base ink layer by halftone printing, whereby the irradiated light is irregularly reflected, and thus the overcoat ink is formed. It was found that the distinction between the image composed of layers and the base ink layer can be easily eliminated, and for such printed matter, an application was filed first. Application 2005-182669).

  However, when forming a base ink layer by halftone printing, there are problems caused by halftone printing, i.e., setting the screen line number and area ratio of halftone dots, Management such as confirmation is required, and there is a problem that it takes more time and cost than solid printing.

Japanese Patent Publication No. 6-78039 JP 2004-34384 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is an ink layer printed on the printed surface by rubbing with a coin. In order to make sure that an image composed of the above is displayed and is clearly visible, before the printed surface is rubbed with coins, it has been improved so that it is more difficult to visually recognize the image. To provide printed matter.

  And in this invention, in order to solve this subject, the point made into the summary is (a) non-coated paper in which the to-be-printed surface is not coated, and (b) of this non-coated paper. A base ink layer printed and formed on the entire surface of the predetermined area on the printing surface using an ink containing at least one white pigment selected from the group consisting of titanium oxide, barium sulfate and calcium carbonate; ) An overcoat comprising an ink layer partially printed using colorless ink on the base ink layer, and forming a predetermined image by a formed portion or a non-formed portion on the base ink layer And a printed matter comprising an ink layer.

  In addition, according to one of the preferable embodiments of the printed matter according to the present invention, high-quality paper or Kent paper is used as the non-coated paper.

  Moreover, according to another preferable aspect of the printed material according to the present invention, a configuration in which the base ink layer contains the white pigment in an amount of 5% by weight or more is employed.

  Furthermore, according to still another desirable aspect of the printed matter according to the present invention, the ink used for the printing formation of the base ink layer is solidified on the printing surface of the non-coated paper, thereby A base ink layer forming main element for fixing the white pigment to the printing surface to form the base ink layer on the printing surface, and a solvent for dissolving the base ink layer forming main element, and the ink The ratio of the content of each of the base ink layer forming main element and the solvent in the solvent is a value within the range of 10 to 350 parts by weight of the solvent with respect to 100 parts by weight of the base ink layer forming main element. Is done.

  In addition, according to another preferred embodiment of the printed matter according to the present invention, the colorless ink used for the formation of the overcoat ink layer is solidified on the base ink layer, thereby An overcoat ink layer forming main element for forming a coat ink layer on the base ink layer, and a solvent for dissolving the overcoat ink layer forming main element, and the overcoat ink layer forming main element in the colorless ink The ratio of the content of each of the element and the solvent is set to a value within the range of 10 to 350 parts by weight of the solvent with respect to 100 parts by weight of the overcoat ink layer forming main element.

  Furthermore, according to another preferred embodiment of the printed matter according to the present invention, the colorless ink used for the printing formation of the overcoat ink layer includes a gloss adjusting material for adjusting the gloss of the overcoat ink layer. The gloss of the overcoat ink layer is adjusted so as to be the same as that of the base ink layer.

  Thus, in the printed matter according to the present invention, when the printing surface is rubbed with a coin, the metal constituting the coin is scraped off with the white pigment contained in the ink forming the base ink layer, and this The scraped metal causes the upper surface of the base ink layer, which is not covered with the overcoat ink layer, to be exposed (colored), except for the overcoat ink layer. It is done. As a result, when a predetermined image is formed by the formation portion of the overcoat ink layer on the base ink layer, such an image is not colored, and only the periphery thereof is colored, and the colored base ink is colored. If the image appears inside the layer in an embossed state and a predetermined image is formed by a non-formation portion of the overcoat ink layer on the base ink layer, the image is colored. , Will come out. As a result, only when the printing surface is rubbed with coins, an image composed of the overcoat ink layer can be surely visually recognized.

  In particular, in such printed matter, a predetermined image is composed of a colorless overcoat ink layer partially formed on a base ink layer containing a white pigment, and such an image is printed. The base ink layer is composed of a large number of halftone dots printed by halftone printing, because non-coated paper that is not coated on the surface to be printed is used as the printing base. As in the case of doing this, the surface of the base ink layer has an uneven shape corresponding to the uneven surface shape of the non-coated paper. Thereby, the surface and edge part of the overcoat ink layer laminated | stacked on a base ink layer also become uneven | corrugated shape, and the irradiated light comes to be irregularly reflected. For this reason, even if the reflectance of the material constituting the base ink layer and the overcoat ink layer is slightly different, the overcoat ink layer depends on how the light strikes before the printed surface is rubbed with coins. Thus, it is possible to advantageously eliminate the fact that the image constituted by the above is easily discriminated.

  In addition, in such a printed matter, since the base ink layer is printed on the surface of the non-coated paper having a concavo-convex shape, the surface of the base ink layer is also concavo-convex, and the surface area of the base ink layer is increased. When the printing surface is rubbed with a coin, the metal constituting the coin is more reliably made up of more of the white pigment located on the surface layer of the base ink layer, and It will be scraped more. As a result, the upper surface of the non-formation portion of the overcoat ink layer in the base ink layer can be more sufficiently colored with the scraped metal.

  Therefore, in the printed matter according to the present invention as described above, the printed surface is rubbed with coins, so that a predetermined image can be surely displayed and can be clearly seen, while the printed surface is coined. Before being rubbed, the image can be viewed more difficult. As a result, the concealment of the image can be effectively improved, and therefore, it can be used extremely advantageously as a scratch-type printed material used for various lotteries, game cards, and the like.

  Further, according to one of the preferred embodiments of the printed matter according to the present invention, when high-quality paper or Kent paper is used as the non-coated paper, the printed image can be more skillfully concealed and the printed surface is rubbed with coins. As a result, an image composed of the ink layer printed and formed on it can surely appear and can be visually recognized more clearly.

  Furthermore, according to another preferred embodiment of the printed material according to the present invention, when the white pigment is included in the base ink layer as described above in a proportion of 5% by weight or more, the printed surface is scraped when rubbed with coins. The upper surface of the non-formation part of the overcoat ink layer in the base ink layer can be more sufficiently colored with the metal of the coin to be used.

  In addition, according to still another preferred embodiment of the printed matter according to the present invention, as the ink for forming the base ink layer, the ratio of the content of each of the base ink layer forming main element and the solvent in the ink If a solvent having a value within the range of 10 to 350 parts by weight is employed with respect to 100 parts by weight of the main forming element, the white pigment contained in the base ink layer is removed from the surface of the base ink layer. It becomes partly protruded, so that when the printing surface is rubbed with coins, the metal of the coins is more fully scraped off. Thereby, the upper surface of the non-formation part of the overcoat ink layer in the base ink layer can be more sufficiently colored with more metal, and the image constituted by the overcoat ink layer becomes clearer. Can be recognized. In addition, even when the base ink layer is formed by printing using a screen printing method, the thinning of the base ink layer can be advantageously realized, so that the surface of the base ink layer is more effectively non-coated. This is an uneven shape corresponding to the uneven shape of the coated paper.

  Further, according to one of the other desirable embodiments of the printed matter according to the present invention, as the colorless ink for forming the overcoat ink layer, the ratio of the content of each of the overcoat ink layer forming main element and the solvent in the colorless ink is The viscosity of the colorless ink that forms the overcoat ink layer is effective if the solvent is used in the range of 10 to 350 parts by weight with respect to 100 parts by weight of the main component for forming the coat ink layer. Accordingly, the surface of the overcoat ink layer is formed into a concavo-convex shape corresponding to the surface of the base ink layer, so that irregular reflection of light occurs on the surface or edge portion of the overcoat ink layer. . As a result, discrimination between the image composed of the overcoat ink layer and the base ink layer by reflection of light can be made more difficult, so that the concealment of the image can be improved more effectively. become. In addition, even when the overcoat ink layer is formed by printing using a screen printing method, the overcoat ink layer can be made as thin as possible, and the presence of the overcoat ink layer and thus the image is effective. There is also an advantage that it can be concealed.

  Furthermore, according to one of the other desirable embodiments of the printed matter according to the present invention, as the colorless ink for forming the overcoat ink layer, an ink containing a gloss adjusting material for adjusting the gloss of the overcoat ink layer is used. If the gloss of the ink layer is adjusted so that it is the same gloss as the base ink layer, the light reflectance in the overcoat ink layer is very effectively the same as the light reflectance in the base ink layer. Therefore, the discrimination between the image composed of the overcoat ink layer and the base ink layer by the reflection of light can be made even more difficult, and the image is concealed more skillfully. Be able to be.

  Hereinafter, in order to clarify the present invention more specifically, a specific configuration of a printed matter according to the present invention will be described in detail with reference to the drawings.

  First, in FIG. 1 and FIG. 2, one embodiment of a printed matter having a structure according to the present invention is schematically shown in a transverse sectional form and a longitudinal sectional form, respectively. As is clear from these figures, the printed matter of the present embodiment has a printing sheet 10, and the base ink layer 12 and the overcoat ink layer 14 are arranged on the upper surface thereof with the base ink layer 12 on the lower side. In this way, it is formed by stacking. In FIG. 2 and also in FIGS. 3 and 6 to be described later, the base ink layer 12, the overcoat ink layer 14 and the like are exaggerated in order to facilitate understanding of the structure of the printed matter of the present embodiment. It should be understood that it is shown with an extremely thick thickness.

  In this embodiment, as the printing sheet 10 to be printed, a non-coated paper whose surface is not coated is used instead of a coated paper whose surface is subjected to a predetermined coating process. It has great features. That is, the non-coated paper is not coated, so that the pulp fibers are exposed on the surface, and therefore the surface 11 is not smooth but uneven (see FIG. 3). Compared to industrial paper, it is basically dull and has a paper quality that allows liquids such as water and solvents to penetrate easily. For this reason, as will be described later, if the base ink layer 12 is printed and formed on the printing surface 16 of the non-coated paper, even when solid printing is performed, the same as when halftone printing is performed. In addition, the surface of the base ink layer 12 has an uneven shape, and it can be advantageously avoided that the printed base ink layer 12 is peeled off.

  In addition, examples of the non-coated paper include high-quality paper, Kent paper, medium-quality paper, top-up paper, and back-up paper, and at least one of these can be appropriately selected depending on the application. It is. Among these non-coated papers, high-quality paper and Kent paper can be printed and formed with a uniform base ink layer 12 because the pulp fibers are more clogged than lower grade paper, and the image is more Since it can be visually recognized more clearly, it can be particularly preferably employed.

  And the to-be-printed sheet 10 which consists of such non-coating paper has the upper surface used as the to-be-printed surface 16, and the base ink layer 12 with respect to the whole circular area | region in the center part of this to-be-printed surface 16 Is formed.

  Here, the base ink layer 12 is formed by printing using a printing ink containing the white pigment 18 by any of known printing methods such as letterpress printing, intaglio printing, offset printing, and screen printing. It is. Further, as shown in FIG. 3, a large number of granular white pigments 18 are dispersed inside the base ink layer 12.

  Then, as indicated by arrows in FIG. 3, the light irradiated on the surface of the base ink layer 12 is irregularly reflected on the surface, and the gloss emitted on the surface of the base ink layer 12 is suppressed to a low level. The entire base ink layer 12 exhibits a dull white color.

  Here, in particular, the white pigment 18 dispersed in the base ink layer 12 is an oxide having a higher hardness than metals used in coins, such as copper, iron, aluminum, zinc, lead, and the like. Titanium, barium sulfate, and calcium carbonate are used singly or in combination of two or more of them.

  As a result, when the surface of the base ink layer 12 is rubbed with coins, the metal constituting the coins is scraped off by the white pigment 18 present on the surface layer portion of the base ink layer 12, and the scraped off. The portion of the surface of the base ink layer 12 that is rubbed with coins can be changed from white to, for example, black or blackish gray.

  Moreover, as described above, here, the base ink layer 12 is formed on the non-coated paper (printed sheet 10) having an uneven surface, so that it has a sufficiently large surface area. . Therefore, when the surface of the base ink layer 12 is rubbed with coins, the coins are brought into contact with more white pigments 18 located on the surface layer portion of the base ink layer 12 so that the metal of the coins The surface of the base ink layer 12 is scraped off more reliably and sufficiently, so that the surface of the base ink layer 12 is changed to a darker color.

  On the other hand, the overcoat ink layer 14 laminated and formed on the base ink layer 12 is any one of known printing methods such as letterpress printing, intaglio printing, offset printing, and screen printing using colorless printing ink. Is printed and formed to be colorless and transparent. Even in the overcoat ink layer 14, the surface is formed into an uneven shape by being formed on the base ink layer 12 having an uneven surface. In the ink layer 14, a granular gloss adjusting material 20 such as a known mat material contained in the colorless ink forming the ink layer 14 is dispersed.

  Thereby, the light irradiated on the surface of the colorless and transparent overcoat ink layer 14 is diffusely reflected also by the uneven shape of the surface and the gloss adjusting material 20 in the overcoat ink layer 14. In this case, the gloss of the colorless and transparent overcoat ink layer 14 is adjusted to the base ink layer 12 by appropriately adjusting the amount of the gloss adjusting material 20 dispersed in the overcoat ink layer 14. It is adjusted so that it can be kept as low as the luster of.

  Further, as is apparent from FIGS. 1 and 2, the overcoat ink layer 14 includes a center-side overcoat ink layer portion 14a having a circular shape laminated at the center of the upper surface of the base ink layer 12, and a base ink layer. The outer peripheral side overcoat ink layer part 14b which exhibits the wide ring shape laminated | stacked on the outer peripheral part of 12 upper surfaces. The inner diameter of the ring-shaped outer peripheral side overcoat ink layer portion 14b is set to be larger than the outer diameter of the circular center side overcoat ink layer portion 14a by a predetermined dimension. Between the central portion and the outer peripheral portion, the overcoat ink layer non-forming portion 22 is provided in the form of a circular groove.

  In other words, here, the overcoat ink layer 14 is partially printed and formed on the center portion and the outer peripheral portion of the upper surface of the base ink layer 12 so as to cover those portions. Between the central portion and the outer peripheral portion of the ink layer 12, there is an overcoat ink layer non-formed portion 22 in which the surface of the base ink layer 12 is exposed without being covered with the overcoat ink layer 14. I'm hurt. Then, on such a base ink layer 12, an image 24 depicting a circle corresponding to a circular groove shape is formed by the overcoat ink layer non-formed portion 22 whose surface is exposed. It has been done.

  Thus, in this embodiment, when the entire printing surface 16 of the printing sheet 10 is rubbed with coins, as shown in FIG. 4, the center overcoat ink layer portion 14a on the base ink layer 12 is obtained. In the formation part of the outer peripheral side overcoat ink layer part 14b and the formation part of the outer peripheral side overcoat ink layer part 14b, coins slide on the respective surfaces of the center side and outer peripheral side overcoat ink layer parts 14a, 14b, and the metal constituting the coin is scraped off. Therefore, no discoloration is possible. On the other hand, in the overcoat ink layer non-formation portion 22 on the base ink layer 12, the metal of the coin is scraped by the white pigment 18 in the base ink layer 12 whose surface is exposed, and the scraped metal The surface portion of the base ink layer 12 exposed in the overcoat ink layer non-formation portion 22 can be changed from white to black or blackish gray. As a result, an image 24 that draws a circle appears on the printing surface 16 of the printing sheet 10.

  Further, here, since the overcoat ink layer 14 constituting the image 24 is colorless and transparent, there is a difference in hue between the colorless and transparent overcoat ink layer 14 and the white base ink layer 12. What happens is advantageously eliminated. In addition, as described above, irregular reflection of light is generated on the surface of the base ink layer 12, and furthermore, by the gloss adjusting material 20 dispersed in the overcoat ink layer 14. Further, the gloss of the surface of the overcoat ink layer 14 is approximately the same as the gloss of the surface of the base ink layer 12. Therefore, before the printed surface is rubbed with coins, an image 24 depicting the overcoat ink layer non-formed portion 22 is drawn, and the central overcoat ink layer portion 14a and the outer overcoat ink layer portion 14b. Are difficult to distinguish from each other due to a difference in color, reflection of light, and the like, so that the image 24 can be skillfully concealed.

  By the way, the composition of the printing ink used for forming the base ink layer 12 on the printing surface 16 of the printing sheet 10 is not limited as long as it includes the white pigment 18. However, here, the base ink layer 12 is formed on the printing surface 16 by being solidified on the printing surface 16 of the printing sheet 10, and the white pigment 18 is formed inside the base ink layer 12. A base ink layer forming main element such as a resin for ink or wax that is embedded and fixed on the printing surface 16 and a solvent for dissolving the base ink layer, and the base ink layer forming main element and the solvent are included. The ink containing the latter in an amount in the range of 10 to 350 parts by weight with respect to 100 parts by weight of the former is suitably used as the printing ink for forming the base ink layer 12.

  In the printing ink having such a composition, the viscosity can be effectively reduced. Therefore, when the base ink layer 12 is printed by using such ink, the white pigment 18 positioned on the surface layer portion of the base ink layer 12 is partially separated from the surface of the base ink layer 12 as shown in FIG. It will be able to protrude. As a result, when the printed surface was rubbed with coins, the metal of the coins was scraped off with the white pigment 18 in a more reliable and sufficient amount, and was exposed in the overcoat ink layer non-formation portion 22. The base ink layer 12 portion is discolored more sufficiently by the scraped metal, so that the image 24 in which the circle is drawn appears even more clearly. Further, the printing ink for forming the base ink layer 12 has the above composition and its viscosity is lowered. For example, the base ink layer 12 is formed by a screen printing method in which the formed ink layer is relatively thick. Even when the ink layer 12 is formed, the base ink layer 12 can be thinned, and the surface of the base ink layer 12 can more effectively correspond to the uneven shape of the non-coated paper. It becomes a shape.

  In addition, the ratio of each content of the base ink layer forming main element and the solvent in the printing ink used for forming the base ink layer 12 is 100 parts by weight of the base ink layer forming main element. When the amount is less than 10 parts by weight, the content of the solvent is too small, so that the viscosity of the ink is sufficiently reduced, and the white pigment 18 in the base ink layer 12 is separated from the surface of the base ink layer 12. It is difficult to partially protrude or to make the base ink layer 12 thin. Therefore, the above excellent characteristics obtained by the decrease in the viscosity of the ink accompanying the increase in the solvent content can be sufficiently obtained. There is a risk of disappearing. In addition, when the ratio of the content of each of the base ink layer forming main element and the solvent in the ink exceeds 350 parts by weight with respect to 100 parts by weight of the base ink layer forming main element, In this case, the content of the main element for forming the base ink layer is too small, and the fixing strength of the white pigment 18 on the printing surface 16 of the printing sheet 10 is lowered. Therefore, when the printing surface 16 of the printing sheet 10 is rubbed with a coin, the white pigment 18 can be detached from the base ink layer 12, and as a result, the image 24 depicting the circle is clearly displayed. May become difficult.

  Further, the amount of the white pigment 18 contained in the ink used for forming the base ink layer 12 is not particularly limited, but the printing is performed in a state where the solvent has disappeared from the ink. It is desirable that the base ink layer 12 formed on the sheet 10 is contained in an amount of 5% by weight or more. This is because when the content of the white pigment 18 in the base ink layer 12 is a small amount that is less than 5% by weight, when the printing surface 16 of the printing sheet 10 is rubbed with coins, The amount of coin metal scraped off by the white pigment 18 in the ink layer 12 is also reduced, thereby preventing discoloration of the base ink layer 12 exposed in the overcoat ink layer non-forming portion 22 due to the scraped metal. This is because there is a possibility that a problem may occur that the image 24 that is displayed becomes unclear.

  When the content of the white pigment 18 in the base ink layer 12 is increased, the white pigment 18 is applied to the printing surface 16 of the printing sheet 10 by the base ink layer forming main elements such as the resin for ink and the wax. There is a tendency for the adhesive strength to decrease. Therefore, the upper limit of the content of the white pigment 18 in the ink is appropriately determined based on the magnitude of the fixing force of the white pigment 18 to the printing surface 16 of the printing sheet 10.

  Further, even when the size of each white pigment 18 is too large, the fixing strength of the white pigment 18 to the printing surface 16 of the printing sheet 10 by the base ink layer forming main element can be reduced. It becomes. On the other hand, when the white pigment 18 is too small, when the printing surface 16 of the printing sheet 10 is rubbed with coins, the amount of metal scraped off by the white pigment 18 is reduced, and the overcoat ink layer non-forming portion 22, the discoloration of the portion of the base ink layer 12 exposed at 22 becomes insufficient, whereby the image 24 that appears is unclear. Therefore, in order to avoid these problems, the white pigment 18 has an average particle diameter (average particle diameter measured by centrifugal sedimentation method, the same shall apply hereinafter) in the range of 0.19 to 0.9 μm. It is desirable that

  Furthermore, the base ink layer 12 is preferably made as thin as possible in order to prevent its presence from being easily seen, but if it is too thin, the printed sheet 10 is printed. The adhesion of the white pigment 18 to the surface 16 is reduced. Therefore, the thickness of the base ink layer 12 is preferably set to a value in the range of about 0.2 to 1.5 μm in consideration of a desirable average particle diameter of the white pigment 18.

  On the other hand, the composition of the printing ink used to form the overcoat ink layer 14 on the base ink layer 12 is not limited as long as it is a colorless printing ink. However, here, the overcoat ink layer 14 is formed on the base ink layer 12 by being solidified on the base ink layer 12, for example, an overcoat ink layer forming main element such as an ink resin or wax, and the like. And the overcoat ink layer forming main element and the solvent are contained in an amount in the range of 10 to 350 parts by weight of the latter with respect to 100 parts by weight of the former. However, it is suitably used as a printing ink for forming the overcoat ink layer 14.

  In the printing ink having such a composition, the viscosity can be effectively reduced. Therefore, when the overcoat ink layer 14 is formed by printing using such ink, the surface of the overcoat ink layer 14 is very effectively provided below the overcoat ink layer 14 as shown in FIG. The surface of the base ink layer 12 has an uneven shape corresponding to the shape of the surface, whereby the light irradiated on the surface of the overcoat ink layer 14 is diffusely reflected on the surface or edge portion. As a result, it becomes more difficult to distinguish the overcoat ink layer 14 from the base ink layer 12 portion exposed in the overcoat ink layer non-formation portion 22 by the reflection of light on the respective surfaces. The edge portions of the center-side overcoat ink layer portion 14a and the outer peripheral-side overcoat ink layer portion 14b are made inconspicuous, and therefore, before the printed surface is rubbed with coins, The image 24 depicting the circle can be concealed more skillfully.

  In addition, when the printing ink for forming the overcoat ink layer 14 has the above-described composition and its viscosity is lowered, for example, when the overcoat ink layer 14 is printed by a screen printing method. In addition, each of the center side overcoat ink layer portion 14a and the outer peripheral side overcoat ink layer portion 14b can be thinned. As a result, the overcoat ink layer portions 14a and 14b and thus the image 24 can be made inconspicuous.

  In addition, the ratio of each content of the overcoat ink layer forming main element and the solvent in the printing ink used for forming the overcoat ink layer 14 is 100 parts by weight of the overcoat ink layer forming main element. Is less than 10 parts by weight, the solvent content is too small to sufficiently reduce the viscosity of the ink. It becomes difficult to enjoy the effect effectively. Further, in the case where the content ratio of each of the overcoat ink layer forming main element and the solvent in the ink is more than 350 parts by weight with respect to 100 parts by weight of the overcoat ink layer forming main element, Since the content of the overcoat ink layer forming main element is too small, the holding power of the gloss adjusting material 20 dispersed in the overcoat ink layer 14 is lowered. Therefore, when the printing surface 16 of the printing sheet 10 is rubbed with a coin, there is a possibility that the gloss adjusting material 20 can be easily detached from the overcoat ink layer 14.

  Moreover, it is desirable that the average particle diameter of the gloss adjusting material 20 contained in the ink forming such an overcoat ink layer 14 is a value within the range of 2.0 to 5.5 μm. This is because when the average particle diameter of the gloss adjusting material 20 is larger than 5.5 μm, the holding power in the overcoat ink layer 14 by the overcoat ink layer forming main element is lowered. In addition, the gloss adjusting material 20 having an average particle size smaller than 2.0 μm is not easily available at present and is difficult to prepare. The content of the gloss adjusting material 20 in the overcoat ink layer 14 is appropriately determined so that the gloss of the overcoat ink layer 14 is the same as that of the base ink layer 12.

  Further, as is clear from the above description, it is desirable that the overcoat ink layer 14 be as thin as possible in order to prevent its presence from being easily recognized. However, if it is too thin, when the gloss adjusting material 20 is contained, the holding power of the gloss adjusting material 20 in the overcoat ink layer 14 is reduced. Therefore, the thickness of the overcoat ink layer 14 is preferably set to a value in the range of about 2.0 to 6.0 μm in consideration of a desirable average particle size of the gloss adjusting material 20. .

  As described above, in the printed matter of the present embodiment, non-coated paper is used as the printing sheet 10, and the base ink layer 12 in which the white pigment 18 is dispersed on the printing surface 16. And a colorless overcoat ink layer 14 is partially printed on the base ink layer 12 to form a non-formation portion 22 of the overcoat ink layer 14 on the base ink layer 12. Then, since the image 24 that draws the circle is configured, the printed surface 16 of the sheet 10 to be printed is rubbed with coins, so that the image 24 that draws the circle reliably appears and becomes clearer. On the other hand, before the printing surface 16 of the printing sheet 10 is rubbed with coins, the visual recognition of the image 24 can be made more difficult. Therefore, it can be used very advantageously as a scratch-type printed material used for various lotteries, game cards, and the like.

  And in such printed matter, the above-described excellent actions and effects are further enhanced by optimizing the composition of each printing ink used for forming the base ink layer 12 and the overcoat ink layer 14 respectively. It can be enjoyed effectively at the level.

  By the way, in the said embodiment, on the to-be-printed surface 16 of the to-be-printed sheet 10, the image 24 which draws (circle) is comprised by the overcoat ink layer non-formation part 22 by which the surface of the base ink layer 12 was exposed. However, for example, as shown in FIGS. 5 and 6, the overcoat ink layer in which the surface of the base ink layer 12 is coated with the overcoat ink layer 14 on the printing surface 16 of the printing sheet 10. An image 24 in which a circle is drawn can be formed by the formed portions 14. In FIGS. 5 and 6, and in FIG. 7 described later, the same reference numerals as those in FIGS. The explanation was omitted.

  That is, here, the white base ink layer 12 in which the white pigment 18 is dispersed inside is printed and formed on the entire surface of the circular region at the center of the printing surface 16 of the printing sheet 10 made of non-coated paper. ing. A colorless and transparent overcoat ink layer 14 covers the inner peripheral portion of the base ink layer 12 in a ring shape on the inner peripheral portion between the center portion and the outer peripheral portion of the base ink layer 12. , Partially printed. Then, the center portion and the outer peripheral portion of the base ink layer 12 are not covered with the overcoat ink layer 14 and the surface of the base ink layer 12 is exposed, and the circular center side overcoat ink layer is not covered. A formed portion 26 and an outer peripheral overcoat ink layer non-formed portion 28 having a wide ring shape are respectively present. Thereby, it is a pattern corresponding to the ring shape of this overcoat ink layer 14 in the formation part of the overcoat ink layer 14 which coat | covers the surface of the base ink layer 12 on the to-be-printed surface 16 of the to-be-printed sheet 10. However, the image 24 in which the circle is drawn is constructed.

  Thus, in the present embodiment, when the entire printing surface is rubbed with coins, as shown in FIG. 7, in the formation portion of the overcoat ink layer 14 on the base ink layer 12, coins are formed on the surface. You can't slip and change color. On the other hand, in the center side overcoat ink layer non-formation portion 26 and the outer peripheral side overcoat ink layer non-formation portion 28 on the base ink layer 12, the white pigment in the base ink layer 12 in which the metal of the coin is exposed. The surface portion of the base ink layer 12 exposed in the center-side and outer-periphery-side overcoat ink layer non-formation portions 26 and 28 is grayed from white to black or darkened by the scraped metal. It can be discolored. Then, on the printing surface 16 of the printing sheet 10, the image 24 that draws a circle is embossed inside the base ink layer 12 that has been discolored without any discoloration, It can be made to appear.

  Even in this embodiment, non-coated paper is used as the printing sheet 10, and the base ink layer 12 in which the white pigment 18 is dispersed is printed on the printing surface 16. At the same time, a colorless and transparent overcoat ink layer 14 is partially printed on the base ink layer 12, and an image 24 depicting a circle is formed by the formation portion of the overcoat ink layer 14 in the base ink layer 12. From the configuration, the same actions and effects as those of the above embodiment can be enjoyed effectively.

  By the way, in the said embodiment, the gloss adjusting material 20 was disperse | distributed in the overcoat ink layer 14, and it adjusted so that each glossiness of the overcoat ink layer 14 and the base ink layer 12 might become comparable. The gloss adjusting material 20 is not essential in the present invention.

  Furthermore, in the said embodiment, although the image 24 was comprised by the pattern which draws (circle), in addition to the pattern and figure other than (circle), various things, such as a character, a number, a pattern, a picture, are included in this image 24. Can be employed.

  Furthermore, it goes without saying that the number, formation position, and the like of the images 24 are not limited to those shown in the embodiment.

  Moreover, in the said embodiment, although the color of the base ink layer 12 was made white by the white pigment 18 contained in it, in addition to this white pigment 18 with respect to the printing ink which forms the base ink layer 12, By adding pigments of various colors, the base ink layer 12 can be made into a color other than white.

  In addition, the present invention can be implemented in various forms, and any of various embodiments relating to various changes, modifications, and improvements of the present invention adopted based on the knowledge of those skilled in the art. It should be understood that the present invention belongs to the category of the present invention without departing from the spirit of the present invention.

  In the following, some representative embodiments of the present invention will be shown and the features of the present invention will be further clarified, but the present invention is subject to any restrictions by the description of such embodiments. It goes without saying that it is not a thing.

  First, the following non-coated paper and coated paper were prepared as printing sheets. As non-coated paper, Kent paper [trade name: Kony Kent (manufactured by Lintec Corporation)], high-quality paper [trade name: New NPi (manufactured by Nippon Paper Industries Co., Ltd.)], colored fine paper [trade name: Kishu color fine quality ( Kishu Paper Co., Ltd.)], and coated paper [trade name: Esprit Coat (manufactured by Nippon Paper Industries Co., Ltd.)], art paper [trade name: Tohishi Art (Mitsubishi Paper Co., Ltd. )] Was prepared respectively.

  On the other hand, an ink resin composed of a polyester-based resin and a known solvent are blended at a blending ratio of ink resin: solvent = 10: 7 on a weight basis and mixed to prepare a colorless ink. A predetermined amount was prepared. Furthermore, a predetermined amount of white ink [trade name: U-Pet 450 White (manufactured by Mino Group)] containing titanium oxide in an amount of 30% by weight as a white pigment was prepared. Then, using the colorless ink and the white ink thus prepared, they were blended in a blending ratio of colorless ink: white ink = 10: 3 on a weight basis and mixed. Thus, a predetermined amount of printing ink having a final composition of titanium oxide: resin for ink: solvent = 3: 15.3: 48.3 on a weight basis was prepared, and this was used as a base ink layer formation. Printing ink was used. In this way, the ratio of the content of each of the resin for ink and the solvent, which is the main element for forming the base ink layer, is 316 parts by weight with respect to 100 parts by weight of the resin for ink, and the operation described later is performed. Thus, a base ink layer forming ink was prepared in which titanium oxide was contained in a proportion of 16.4% by weight in the base ink layer printed on the printing sheet. The average particle size of titanium oxide (white pigment) contained in the base ink layer forming ink was 0.35 μm.

  In addition, a colorless ink [trade name: U-Pet931 Matte Medium (manufactured by Mino Group Co., Ltd.)] in which an ink resin composed of a polyester resin and a silica gel matting agent as a gloss adjusting material are mixed. A predetermined amount was prepared. And this colorless ink and the well-known solvent were mix | blended by the mixing | blending ratio of colorless ink: solvent = 10: 7 on the basis of weight, and were mixed. As a result, a predetermined amount of printing ink having a final composition of silica gel matting agent: resin for ink: solvent = 1: 10.25: 31.25 on a weight basis was prepared, and this was formed as an overcoat ink layer. Printing ink. Thus, the overcoat ink layer forming ink in which the ratio of the content of each of the ink resin and the solvent, which is the main component of the overcoat ink layer formation, is 305 parts by weight with respect to 100 parts by weight of the ink resin. Prepared. The average particle size of the silica gel matting agent (gloss adjusting material) contained in the ink for forming the overcoat ink layer was 3.9 μm.

  Then, using the prepared printing sheet, the base ink layer forming ink prepared as described above, and a 300 mesh screen, a predetermined size on the surface of the printing sheet is obtained. In the circular area, the base ink layer forming ink was solid-printed by a known screen printing method and dried and solidified. Thus, a base ink layer was formed by printing on the surface of each printing sheet.

  Subsequently, using the printing sheet on which the base ink layer is printed, the overcoat ink layer forming ink prepared in advance, and the 300-mesh screen, the central portion on the base ink layer in each printing sheet is printed. The ink for forming the overcoat ink layer was solid-printed on the circular region and the ring-shaped region on the outer peripheral portion by a known screen printing method, and dried and solidified. As a result, a circular center-side overcoat ink layer portion and a ring-shaped outer periphery-side overcoat ink layer portion as shown in FIGS. 1 and 2 are printed on the base ink layer on the surface of each printing sheet. In addition to the formation, a ring-shaped overcoat ink layer non-formation portion was provided, and thus an image depicting a circle was formed in the overcoat ink layer non-formation portion.

  In this way, a base ink layer and an overcoat ink layer are laminated on the surface of various printed sheets, and the overcoat ink layer is not formed on the base ink layer. A printed material provided with an image of drawing was prepared.

  Then, each of the produced printed materials was visually observed before rubbing the surface with coins to determine whether or not the image could be easily recognized and evaluated for concealment. Thereafter, the surface of each printed material was rubbed with a coin to reveal an image, and whether or not the image at that time was clear was visually examined to evaluate the sharpness. The results are shown in Table 1 below. In Table 1, regarding the visual image recognition survey before rubbing the surface of the printed material with coins, it is possible to recognize that the image can be easily recognized, although it is difficult to recognize the image. The evaluation results of the concealment were shown as Δ for those that existed and ◯ for those that could not recognize the image. In addition, regarding the investigation on the sharpness of the image after rubbing the surface of the printed material with a coin, the image is clear and A can be confirmed very clearly, and the image can be easily confirmed but is slightly unclear. The evaluation results of the sharpness were shown as B, and as C, the image was unclear and could not be easily confirmed.

  As is clear from the results of Table 1, in printed matter produced using uncoated paper, it is impossible to visually recognize the image before rubbing the surface with coins, and the surface is covered with coins. It can be seen that after rubbing with, the image can be clearly or easily confirmed. From this, printed matter produced using uncoated paper is excellent in image concealment before the surface is rubbed with coins, and after the surface is rubbed with coins, the image is clear. It can be clearly recognized that it can be manifested.

  On the other hand, in a printed matter made using coated paper, it is possible to easily view the image before rubbing the surface with coins, and the image before the surface is rubbing with coins It turns out that it is inferior in concealment and the image after rubbing the surface with a coin is also somewhat unclear.

It is a cross-sectional explanatory drawing which shows one Embodiment of the printed matter according to this invention, Comprising: It is a figure corresponded in the II cross section in FIG. It is II-II sectional explanatory drawing in FIG. FIG. 3 is a partially enlarged explanatory view in FIG. 2. It is a figure for demonstrating the use condition of the printed matter shown by FIG. 1, Comprising: The state which rubbed the surface of the printed matter with the coin and made the image appear is shown. It is a figure corresponding to FIG. 1 which shows another embodiment of the printed matter according to this invention, Comprising: It is a figure equivalent to the VV cross section in FIG. It is VI-VI cross-section explanatory drawing in FIG. FIG. 6 is a diagram for explaining a use state of the printed matter shown in FIG. 5, and shows a state in which an image appears by rubbing the surface of the printed matter with a coin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Printed sheet 12 Base ink layer 14 Overcoat ink layer 16 Printed surface 18 White pigment 20 Gloss adjustment material 22 Overcoat ink layer non-formation part 24 Image 26 Center side overcoat ink layer non-formation part 28 Outer circumference side overcoat ink Non-layered part

Claims (6)

Uncoated paper with the coated surface uncoated,
A base ink printed and formed on the entire surface of the predetermined area of the non-coated paper using an ink containing at least one white pigment selected from the group consisting of titanium oxide, barium sulfate and calcium carbonate Layers,
An overcoat ink comprising an ink layer partially printed and formed using colorless ink on the base ink layer, and constituting a predetermined image by a formed portion or a non-formed portion on the base ink layer Layers,
A printed matter characterized by comprising:   The printed matter according to claim 1, wherein the non-coated paper is high-quality paper or Kent paper.   The printed matter according to claim 1 or 2, wherein the base ink layer contains the white pigment in an amount of 5% by weight or more.   The ink used for the printing formation of the base ink layer is solidified on the printing surface of the non-coated paper so that the white pigment is fixed to the printing surface and the base ink layer is printed. A base ink layer forming main element formed on the surface, and a solvent for dissolving the base ink layer forming main element, and a ratio of each content of the base ink layer forming main element and the solvent in the ink The printed matter according to any one of claims 1 to 3, wherein the solvent has a value within a range of 10 to 350 parts by weight with respect to 100 parts by weight of the base ink layer forming main element. .   An overcoat ink layer forming main element for forming the overcoat ink layer on the base ink layer by solidifying the colorless ink used for the printing of the overcoat ink layer on the base ink layer; A solvent that dissolves the overcoat ink layer forming main element, and the ratio of the respective contents of the overcoat ink layer forming main element and the solvent in the colorless ink is the overcoat ink layer forming main element. The printed matter according to any one of claims 1 to 4, wherein the solvent has a value within a range of 10 to 350 parts by weight with respect to 100 parts by weight of the element. The colorless ink used for the printing formation of the overcoat ink layer includes a gloss adjusting material that adjusts the gloss of the overcoat ink layer, and the gloss of the overcoat ink layer is the same as that of the base ink layer. The printed matter according to any one of claims 1 to 5, wherein the printed matter is adjusted to be.

Images