JP4840693B2 - Anti-counterfeit printed matter - Google Patents

Description

  The present invention is used for printed matter that requires anti-counterfeiting, including banknotes, government bonds, passports, securities, cards, and valuable printed matter.

  In recent years, with the increase in image quality of color copiers and computerization of color platemaking technology, counterfeiting means for banknotes and securities tend to be diversified. In particular, since the resolution of image input / output devices such as color copiers and scanners has improved dramatically, it has become relatively easy to extract fine lines and minute characters used in securities. For this reason, techniques that cannot be reproduced by a copying machine or a printer of a personal computer, for example, pearl printing that enables visual recognition of different colors depending on the angle, and intaglio printing that provides a concavo-convex feeling with a hologram or a tactile sensation have become more effective techniques.

  Accordingly, the present applicant has disclosed JP-A-2004-90381 and JP-A-2004-209646, focusing on pearl printing.

  Japanese Patent Application Laid-Open No. 2004-90381 discloses a method in which a second message image is printed using two-way lines with different arrangement directions using ink that is raised on the surface of a substrate, and then the first message is displayed on the second message image. The image is printed with optically changing ink, and the first and second message images appear depending on the viewing angle (see Patent Document 1).

  On the other hand, in Japanese Patent No. 3718712, a basic image portion and a background image portion are printed on the surface of a base material with screen printing ink, and the basic image portion is positive depending on the viewing angle. The image changes from a negative image to a negative image (see Patent Document 2).

  However, in Patent Document 1, an optical change ink is printed on a line-like convex image line having different arrangement directions for the purpose and problem of displaying a plurality of latent images, but on the convex image line of a printed matter. It does not touch on the effect of pearl printing and changing the line width and line pitch of the line, but only mentions the configuration. If the line width and the line pitch are not the same, the latent image when the printed material is tilted cannot be clearly seen, so that there is a drawback that the line configuration is simple and duplication is easy.

  Further, in Patent Document 2, the message image portion and the background image portion are configured by a raised image line containing a pearl pigment or the like, but the image line width is restricted by the particle diameter of the pearl pigment used. Specifically, the average particle size of the pearl pigment usually used in screen printing, gravure printing or intaglio printing is usually about 5 to 150 μm, which is larger than the particle size used in normal printing. Therefore, in order to obtain a printed material having a remarkable negative-positive effect, the line width of the printed material depends on the particle diameter of the pearl pigment (or scaly pigment), but at least the image line width is larger than the particle diameter of the pearl pigment. Is more than 3 times and the particle size variation is about ± 10 μm. If the image width is not designed to be preferably 5 times or more, the clogging of the printing plate occurs during printing, and the image width is long. The same print quality cannot be maintained over time. Specifically, the printing plate surface varies depending on the printing method, but in the case of gravure printing, it is determined by the cell of the gravure cylinder, in the case of screen printing, the opening width of the screen ridge, and in the case of intaglio printing, it is determined by the concave portion of the intaglio plate surface.

  Therefore, it is necessary to appropriately design the image line width depending on the particle diameter of the pearl pigment to be used. However, in practice, for example, even when a pearl pigment having an average particle diameter of 5 μm is used, it is 75 μm or less (the dispersion of the pearl pigment). Printing with an image line width of (positive side) particle size: 15 μm × allowable value not to cause plate clogging: 5 times) is hardly performed due to the influence of plate clogging. In addition, developments have been made to improve the pearl luster by reducing the pearl pigment to 5 μm or less. However, when the pearl pigment becomes smaller, the particle diameter of the pearl pigment, for example, the scaly pigment approximates the thickness and the appropriate light. In other words, the pearl pigment particles need to have a certain size, because the refraction of the pearl pigment is not obtained and the pearly luster does not appear after printing and drying. Therefore, when the pearl print layer is formed by screen printing or the like, it has been difficult in practice to produce a printed material with a pearly luster stably for a long time with an image line width of 75 μm or less.

  The above-mentioned problem is not a problem limited to Patent Document 2, but is a problem related to pearl printing in general. Usually, when printing a pearl pigment on a base material, a gravure printing or screen printing method capable of printing even with a relatively large particle diameter of a printing pigment is used, but printing is performed with a solid pattern having no gradation. The reason for this is that when a gradation is provided in the design, the fine line that becomes the highlight part of the gradation is not suitable due to the effect of plate clogging at the time of printing, and even if it is printed with a fine line This is because a remarkable pearly luster cannot be obtained because the image area is small. Therefore, when the design is composed of fine lines, it is difficult to produce a printed material having a remarkable pearly luster.

  By the way, when pearl printing is performed on the base material, as a method for more clearly observing the pearl luster, as shown in FIG. 8A, first, offset printing is performed on the base material 10a such as white paper having light reflectivity. A method of providing a pearl print layer 10c by a screen printing method or the like on a print layer 10b after providing a print layer 10b with a black ink that is flat and solid and light-absorbing, is known. The method is used for color sample prints 10 for various pearl pigments.

  As a reason for this, as shown in FIG. 8B as a comparative example, the printed matter 11 in which the pearl print layer 11c is provided on the light-reflecting white base material 11a by a screen printing method or the like was visually recognized by natural light or the like. In this case, incident light with respect to the pearl pigment 11d is divided into first reflected light (or interference light) reflected by the pearl pigment 11d and transmitted light (complementary color of the reflected light), and the transmitted light is a light-reflective substrate. This is because it can be visually recognized as the second reflected light. For this reason, although two colors of reflected light can be visually recognized by the first and second reflected lights, the reflected lights interfere with each other (or mixed), and a strong pearly luster cannot be obtained, and the pearl pigment 11d. It is not possible to visually recognize only the pearly luster due to the interference light that is originally exhibited in

  On the other hand, as shown in FIG. 8A, the color sample printed matter 10 was visually recognized by natural light or the like by providing a black-colored print layer 10b that absorbs light in the lower layer of the pearl print layer 10c by a screen printing method or the like. In this case, the incident light with respect to the pearl pigment 10d can be visually recognized as reflected light (or interference light) reflected by the pearl pigment 10d, but the transmitted light (complementary color of the reflected light) is transmitted through the lower layer because it is a light-absorbing substrate. It is absorbed and not reflected. Accordingly, since only the pearl luster reflected by the pearl pigment 10d can be visually recognized, only the pearl luster due to the interference light that the pearl pigment 10d should originally exhibit can be clearly seen, and there is no reflected light from the base material and interference of the reflected light. As a result, no strong pearl luster is visible.

  However, conventionally, as shown in FIG. 8 (a), the base 10a is provided with a solid black print layer 10b in a relatively large printing area (or a black base print layer is provided on the back surface of the transparent base). However, the formation of the pearl print layer 10c thereon is merely used as a color sample showing the pearl luster of a pearl pigment, and development aimed at preventing forgery has not been attempted. The “pearl pigment” referred to here is a pigment that exhibits a pearly luster and iris color with a special optical effect, and is a pigment in which natural mica is coated with a metal oxide such as titanium oxide or iron oxide. However, other known pigments may be used as appropriate. “Pearl luster” is a pearlescent pigment that produces interference light due to multiple reflections when a pearl print layer is formed by screen printing or the like when a pearl print layer is visually recognized. Such as gloss, iris color, and metal color.

JP 2004-90381 A (Pages 1-8, FIGS. 6-8) Japanese Patent No. 3718712 (page 1-9, FIG. 5-12)

  The present invention solves the above-described problems and can exhibit a remarkable pearly luster even with a fine image line. In particular, a pearl luster that can be visually recognized by interference light from a pearl pigment can be imparted even in a gradation pattern including a fine image line, and in addition, a change in the intensity of the pearl gloss can be visually recognized according to the image line of the gradation image. The present invention provides printed matter with high anti-counterfeiting properties.

  The present invention is a printed matter having a gradation design on at least one of the light-reflective substrates, and the gradation design is formed by laminating the second printing layer on all or a part of the first printing layer. The first printed layer is convex and has a plurality of lines with light-absorbing ink, and the line width of the lines is different for each predetermined area of the gradation pattern. The image line height is different for each predetermined area of the gradation pattern so as to have a predetermined circumference according to the image line width, and the second print layer is a pearl print layer, The pattern can be visually recognized with gradation in the printing color of the first printed layer in the diffuse light area, and the gradation can be visually recognized with pearl gloss by the pearl printed layer laminated on the first printed layer in the regular reflection light area. It is a forgery-proof printed matter characterized by being capable of being printed.

  The present invention is a printed matter having a gradation design on at least one of the light-reflective substrates, and the gradation design is formed by laminating the second printing layer on all or a part of the first printing layer. The first printing layer is convex and has a plurality of lines with light-absorbing ink, the line width and the line height of the line are the same, and the line is a predetermined tone pattern. The second printed layer is made up of a pearl printed layer, and the gradation pattern is made up of the printed colors of the first printed layer in the diffused light region. The anti-counterfeit printed matter is characterized in that it can be visually recognized and can be visually recognized with a gradation of pearl luster by a pearl print layer laminated on the first print layer in a regular reflection light region.

  In the present invention, a third printing layer is provided as a pearl printing layer between a substrate and the first printing layer and the second printing layer, and the pearl pigment contained in the second and third printing layers is provided. The anti-counterfeit printed matter is characterized by being the same, homogeneous or different.

  The present invention is the anti-counterfeit printed matter characterized in that the pearly luster can be visually recognized with an iris color or metallic toning.

  The present invention is the anti-counterfeit printed matter, wherein the second printed layer is solid or linear.

  The present invention is the anti-counterfeit printed matter, wherein the light absorbing ink has a hue of black, brown, dark blue, dark green, or dark purple.

  The present invention is the anti-counterfeit printed matter, wherein the gradation pattern is composed of a highlight portion, an intermediate portion, and a shadow portion.

  The present invention is the forgery-preventing printed matter, wherein the image line width of the image line is 100 μm or less in the highlight portion of the gradation pattern.

  The present invention is the anti-counterfeit printed matter, wherein the line width of the line is 1 to 500 μm or less.

  The present invention is the anti-counterfeit printed matter, wherein the line height of the line is 1 to 150 μm or less.

  The present invention is a forgery-preventing printed matter characterized in that the pigment diameter of the pearl pigment used in pearl printing is 1/3 or more of the line width of the image line.

  The present invention includes a pearl print layer that is laminated or concealed on an image line because the fine line is convex and the pearl print layer is laminated thereon to increase the circumference or surface area of the image line. Since the number of pearl pigments also increases, the interference light (or multiple reflected light) of pearl pigments also increases. In addition, by making the image line black, only the interference light of the pearl pigment can be visually recognized, so that strong pearl luster can be visually recognized. Therefore, a pearl printed matter having higher visibility than that of the conventional art can be produced even in a fine image line.

  In addition, when the printed matter of the present invention is viewed in the diffuse reflection region, the gradation image is pearly glossy by the black color of the first printing layer and the interference light of the pearl pigment 4a laminated on the substrate 1 other than the image line 3a. Is visible. On the other hand, when visually recognizing in the regular reflection region, strong pearl luster can be visually recognized by the interference light of the pearl pigment 4a included in the pearl print layer, which is the second print layer laminated on the image line 3a of the gradation image, and gradation. As a result of the different number of orientations in which the pearl pigment 4a is laminated depending on each image line 3a of the design, the intensity of the interference light is different on each image line 3a, and the change in the intensity of the pearl luster corresponding to the gradation design can be visually recognized. Therefore, the gradation pattern can be visually recognized with different colors depending on the viewing angle.

  Furthermore, in the configuration of the present invention, a fine image line is formed into a convex shape, and a pearl printing layer is formed in a solid shape by screen printing thereon, so that the fine particle size of the pearl pigment is not limited by the size. High pearly luster can be imparted even at the line width.

  In addition, when the printed matter produced by the configuration of the present invention is copied, the black color as the print color of the image line which is the first print layer can be copied, but the pearl print layer provided on the image line is transparent or translucent. Therefore, it is difficult to copy, and even if the printed material is viewed in the regular reflection region, it is not possible to reproduce pearly luster such as pearly or pearly luster, so that the anti-counterfeiting effect is excellent.

  In addition, when the second pearl print layer, the convex image line, and the first pearl print layer are laminated on the base material in the order, the second pearl print layer is printed at the paper manufacturing stage. Since it is not necessary to perform pearl printing twice, it can be produced efficiently.

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

  First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a printed matter in the present invention. FIG. 2 shows a convex image line shape serving as the first print layer of the present invention. FIG. 3 is a schematic view in which a pearl pigment is laminated on a fine convex image line. FIG. 4 illustrates a first embodiment of the present invention. FIG. 5 is a diagram showing the effect of the present invention. FIG. 6 illustrates a second embodiment of the present invention. FIG. 7 illustrates a third embodiment of the present invention. FIG. 8 shows a printed matter of a conventional example having a pearly luster.

(Configuration of printing layer 1)
FIG. 1A shows a printed matter 1 according to the present invention, which is a paper sheet that reflects light on a base material 2, for example, a white paper. It is provided as the printing layer 3. The printing layer 3 is provided with a plurality of convex (swelled) image lines 3a that are not solid patterns, and have a continuous tone pattern by the image lines. Specifically, as shown in FIG. 1B, the image line 3a is provided with a plurality of vertical lines, and the width of the image line gradually narrows from top to bottom. Changes in density can be visually recognized continuously in the pattern itself. Also, it is essential to use a black color that absorbs visible light as the color of the image line 3a. As the black color, black, brown, dark blue, dark green, dark purple, or the like is preferable, but there is no color restriction as long as light is absorbed. The pattern of the printing layer 3 may be a character, a number, a mark, a human image, or the like, and the image line 3a may be a curved line, a broken line, a branch line, a halftone dot, a pixel, or a grid in addition to a straight line. In addition, since the effect of this invention cannot be exhibited if the base material 1 uses a light absorptive base material, it is necessary to use the light reflective base material 1. FIG.

  Next, as a configuration of a continuous tone pattern by image lines, for example, the image line 3a has an image line pitch P of 300 μm, the shadow part c has an image line width of 250 μm, an image line height of 120 μm, and the intermediate part b has an image line pitch. In the highlight portion c, the line width is 150 μm, the image line height is 70 μm, and the image line width is 50 μm and the image line height is 20 μm. The image line is thin and low from the top to the bottom. In the case where a continuous tone pattern by an image line is formed by the image line 3a, the image line width is 5 to 300 μm, preferably 10 to 100 μm, and the image line pitch is 5 to 500 μm, preferably 10 to 250 μm. The height is 1 to 200 μm, preferably 1 to 100 μm. The printing layer 3 is preferably applied with a continuous tone pattern based on the image line in order to prevent forgery. However, the print layer 3 may be applied with a thick or thin change in the image line itself, or with a non-continuous image. The structure of the part may be used. Further, as the continuous tone pattern by the image line of the printing layer 3, the configurations described in Japanese Patent No. 3721823 and Japanese Patent Application Laid-Open No. 2005-28645 disclosed by the present applicant may be used. The image line 3a may not be arranged with a regular pitch and a regular wiring, and the line itself may be disconnected.

  The image line 3a in the printing layer 3 is preferably an oxidation polymerization type ink, a UV curable ink, an electron beam curable ink, an ink having ultraviolet curing and oxidation polymerization functions (see Japanese Patent No. 2113880), or a two-component mixed ink. . The printing method is not particularly limited, but an intaglio printing method or a screen printing method is preferable.

(Configuration of printing layer 2)
Next, for example, the second print layer 4 is provided as a pearl print layer by screen printing so that a “star” pattern as shown in FIG. 1A is laminated on the first print layer 3. The print area of the print layer 4 is larger than the print area of the print layer 3, and the pearl print layer is preferably provided in a solid shape. With this configuration, the image line 3a of the print layer 3 has a fine image line, Precisely, even if an image line of 100 μm or less is included, the continuous tone pattern by the image line of the printing layer 3 can visually recognize a pearly luster having a gradation in the entire pattern. In addition, the printing layer 4 should just coat | cover all or one part of the image line 3a of the printing layer 3 with a pearl printing layer, and uses UV curable ink, an electron beam curable ink, etc., and if it is screen printing, it is 100-300. For mesh and gravure printing, printing may be performed at 100 to 250 line / inch. Further, the particle diameter of the pearl pigment used in the pearl printing layer is preferably about 5 to 100 μm and the average particle diameter is about 10 to 50 μm, and may be appropriately selected depending on the number of screen lines to be printed. Further, the height (or thickness) of the pearl print layer of the print layer 4 is desirably lower than the image line height of the highlight portion of the image line 3a. The reason is that if the image line 3a is filled with the printed layer 4 in a flat shape, the image line 3a may not be oriented along the convex shape of the image line 3a. Therefore, in order to obtain a remarkable pearl gloss, the height of the printing layer 4 is preferably 1/5 to 4/5 of the height of the image line 3a, but is not limited to this number. Furthermore, the printing layer 4 may be linear rather than solid, and for example, Japanese Patent No. 3718712 disclosed by the present applicant may be used.

(Appearance of pearl luster)
FIG.1 (c) is sectional drawing (XX 'part) of Fig.1 (a), and shows typically the cross section of the printed matter of this invention. A printing layer 4 is laminated on the base material 2 on a black-colored image line 3 a to be the printing layer 3. Since the printing layer 4 is a pearl printing layer, the pearl pigment 4a is oriented on the substrate 2 and the image line 3a. At this time, if the image line 3a is convex and has a semicircular cross-sectional shape, the image line width of the image line 3a is X, and the peripheral length Y of the image line 3a is obtained by the following equation.

したがって、画線３ａの凸状の周長Ｙは、画線幅Ｘの約１．５倍となることから表面積も増加する。一方、図１（ｄ）に示すように、オフセット印刷で黒系色の画線３ｂを平坦状に設けた印刷物１ｂの場合は、画線３ｂの画線幅Ｘと周長Ｙは平坦状であることから等しくで周長は変化しない。従って、画線３ａを凸状とすることで、画線３ａ上に配向するパール顔料４ａの配向数が多くなり、パール顔料による干渉光も増えるためパール光沢も向上する。加えて、画線３ａは黒系色であるために、印刷層３の領域では、パール顔料４ａの干渉光のみを視認できることから、二重にパール光沢を向上することができる。なお、画線３ａを半円状で説明しているが、図２（ａ）〜（ｂ）に示すような、楕円状、三角状及び四角状等、形状の工夫で周長又は表面積を増加することができると共に、パール光沢も高くなる。また、図２（ｄ）のように、まず、平坦に印刷層３ａを設けてエンボスにより凸状としても良い。なお、ここでいう「周長」とは、画線３ａの基材２と接していない凸状の周囲の長さをいう。なお、断面図に示すパール顔料４ａの配向状態は模式的に示したものであり、実際は印刷層４内の上層及び中層等に多数配向されている。

Therefore, since the convex circumference Y of the image line 3a is about 1.5 times the image line width X, the surface area also increases. On the other hand, as shown in FIG. 1D, in the case of a printed matter 1b in which the black color image line 3b is provided in a flat shape by offset printing, the image line width X and the circumferential length Y of the image line 3b are flat. Since it is equal, the circumference does not change. Therefore, by making the image line 3a convex, the number of orientations of the pearl pigment 4a oriented on the image line 3a is increased, and interference light due to the pearl pigment is increased, so that the pearl gloss is also improved. In addition, since the image line 3a is a black color, since only the interference light of the pearl pigment 4a can be visually recognized in the region of the printing layer 3, the pearl luster can be doubled. In addition, although the drawing line 3a has been described in a semicircular shape, the circumference or surface area is increased by elaborating the shape, such as an elliptical shape, a triangular shape, and a rectangular shape as shown in FIGS. As well as high pearl luster. Further, as shown in FIG. 2D, first, the printing layer 3a may be provided flat and may be convex by embossing. Here, the “peripheral length” refers to the length of the periphery of the convex shape that is not in contact with the base material 2 of the image line 3a. In addition, the orientation state of the pearl pigment 4a shown in the cross-sectional view is schematically shown, and in fact, many orientations are made in the upper layer, the middle layer, and the like in the printing layer 4.

  Further, according to the configuration of the present invention, a remarkable pearl gloss can be imparted even to a fine image line 3a of 75 μm or less. For example, as shown in FIG. 3, the print layer 3 is a black line 3a, the line width is 20 μm, the line height is 30 μm, and the particle diameter of the pearl pigment 4a of the pearl print layer, which is the print layer 4, is set. In the case of 10 μm, the image line 3a is covered with a plurality of pearl pigments 4a, and since the lower layer of the pearl pigment 4a is a black color, only the interference light of the pearl pigment 4a can be visually recognized, so that even a fine image line is remarkable. Pearl luster is obtained.

  On the other hand, as a comparative example, for example, white paper is not used for the base material 1 (not shown), and the pearl print layer is formed by screen printing or gravure printing with a pearl pigment having an image line width of 20 μm and a particle diameter of 10 μm. When provided (not shown), printing cannot be performed due to plate clogging or clogging, so the particle diameter of the pearl pigment 4a needs to be fine. However, in the case of a fine pearl pigment, a predetermined pearl pigment thickness cannot be obtained, and light cannot be effectively interfered with or oriented, so that even if pearl luster appears, it becomes weak.

Example 1
FIG. 4 shows a printed matter 1 according to the present invention. As shown in FIG. 4A, “1” which becomes the first printed layer 3 by using an intaglio printing machine on a base material 2 which becomes a light-reflective white paper. After printing the tone pattern with the image line “,” the pearl print layer was applied on the print layer 3 as a solid pattern with no tone on the second print layer 4 on the print layer 3 by a screen printer.

  “1” of the printing layer 3 is formed of a plurality of convex image lines 3 a with black ink, and the density changes in the vertical direction. Specifically, the lower part of “1” is a highlight part a, the central part of “1” is an intermediate part b, and the upper part of “1” is a shadow part c. It is a gradation design. As shown in FIGS. 4B to 4D, for example, the gradation forming method is arranged so that the image line 3a is obliquely intersected, and the image line pitch P is set to 400 μm in each region, so that the highlight portion 4A, the line width L1 of the line 3a is 30 μm, the line height is 15 μm, and the middle part b is the line width of the line 3a as shown in FIG. 4C. L2 is 140 μm, the image line height is 70 μm, and the shadow portion c is continuously formed by forming the image line width L3 of the image line 3a as 250 μm and the image line height 120 μm as shown in FIG. Has changed. Moreover, although the cross-sectional state (XX 'part) of each area | region is shown to FIG.4 (b')-(d '), as the density | concentration becomes dark, the line width has expanded, and the line 3a is accompanying it. Since the height gradually increases, the circumference of the image line 3a also increases. 4B to 4D show the configuration of only the print layer 3, and actually the print layer 4 is laminated on the print layer 3.

  4 (b ″) to (d ″) are enlarged views of a region surrounded by a dotted line in FIGS. 4 (b ′) to (d ′). As can be seen from the cross-sectional shape, the image is drawn in the order of the highlight portion a in FIG. 4B ″, the intermediate portion b in FIG. 4C ″, and the shadow portion c in FIG. 4C ″. Since both the width and the height of the image line are increased, the peripheral length of the convex portion of the image line 3a is also increased. Moreover, since the pearl pigment 4a of the pearl printing layer which is the printing layer 4 is oriented on the image line 3a of each region, the length of the circumference of each image line 3a in the pattern by the printing layer 3 Accordingly, the number of orientations of the pearl pigment 4a is also increased. The screen printing uses 200 mesh wrinkles, the pearl pigment 4a is transparent, and uses a flake-like pigment with titanium oxide on natural mica, an average particle size of 10 μm, and a pigment that emits a green metallic luster. The height of the layer 4 was 5 μm.

  Therefore, in Example 1, even a fine image line 3a of about 30 μm arranged in the highlight portion a can give a pearl gloss, specifically, a greenish metal gloss, and the image line in each region. The change in the intensity of the pearl luster can be visually recognized according to the length of the circumference 3a. For this reason, since the intensity of pearl luster changes by changing the width and height of the image line 3a constituting the continuous tone pattern by the image line, the continuous tone pattern in pearl luster is also visible depending on the viewing angle. it can. Further, the pearly luster in the two-layer region in which the printing layer 3 and the printing layer 4 are laminated and the one-layer region in which only the printing layer 4 is formed is the color (or the lower layer of the printing layer 4 which is the pearl printing layer in each region (or Since the (light reflectivity) is different, the intensity of the pearl luster is different and visible.

  FIG. 5 is a schematic diagram in the case of visually recognizing a continuous tone pattern with pearly luster in the configuration of the present invention. FIG. 5A is a schematic diagram when a light source is applied to the image line 3a from above and visually recognized (observed) from above. This environment is referred to as a “diffuse reflection region” (a pearl laminated on the image line 3a). The angle at which the pigment 4a is not reflected). At this time, since the pearl pigment 4a is transparent, the first pearl luster of the pearl pigment 4a laminated on the substrate 1 and the black printing color of the first printing layer forming the continuous tone image can be visually recognized. On the other hand, FIG. 5B is a schematic diagram in which the light source is applied to the image line 3a from above and is visually observed (observed) from an oblique direction. This environment is referred to as a “regular reflection region” (a pearl pigment laminated on the image line 3a). Is the angle of reflection. At this time, the second pearl gloss of the pearl pigment 4a contained in the pearl print layer, which is the second print layer laminated on the image line 3a of the gradation image, can be visually recognized, and each of the continuous gradation patterns by the image line is visible. As a result of the different orientation number of the pearl pigment 4a depending on the image line 3a, the intensity of the pearl luster is different, and the change in the intensity of the pearl luster corresponding to the gradation pattern can be visually recognized. Therefore, the continuous tone design can be visually recognized with different colors depending on the viewing angle. In addition, the diffuse reflection area and the regular reflection area can be visually recognized with different first and second pearl luster intensities due to the influence of the background color. In addition, although the metallic luster which took on green was used for the pearl pigment 4a, any may be sufficient if it is an iris color, and metallic tones, such as silver white and gold white, and these may be combined.

  Further, the print layer 4 may be laminated on a part of the print layer 3 instead of the whole. For example, if the printing layer 4 is laminated only on the right half area of the “1” pattern that is the printing layer 3, the right half of “1” has pearly gloss, but the left half has no pearly gloss. Can be formed.

  Furthermore, the print layer 4 may be laminated by color-coding the print layer 3 into a plurality of regions. For example, if the right half area of the pattern “1” which is the printing layer 3 is brown and the left half area is dark brown, printing can be performed by preparing the inking printing machine with each color inking roller and pattern roller. In addition, if the print layer 4 is laminated with the pearl print layer on the entire print layer 3, the pearly luster emits different interference light due to the influence of the background color in the left and right areas of "1". With this pearl pigment, two types of printed matter exhibiting pearl luster can be obtained.

(Example 2)
In the second embodiment, gradation is given by changing the configuration of the image line 3a in the printing layer 3 of the first embodiment. However, since the other configurations are the same, the description of the same configuration is omitted and different. Only the configuration will be described.

  For example, as shown in FIGS. 6B to 6D, the gradation is formed by arranging the image line 3a so as to intersect in an oblique direction, and the image line width in the image line 3a forming all the regions. L is 60 μm, the image line height is 30 μm, the highlight part a is as shown in FIG. 6B, the image line pitch P1 of the image line 3a is 400 μm, and the intermediate part b is as shown in FIG. The image line pitch P2 of the image line 3a is 250 μm, and the shadow part c is formed with the image line pitch P3 of the image line 3a being 90 μm as shown in FIG. Yes. Moreover, although the cross-sectional state (XX ′ portion) of each region is shown in FIGS. 6 (b ′) to (d ′), as shown in the drawing, the line pitch decreases as the density increases, and the unit The image area per area gradually increases, and as a result, the surface area of the image line 3a also increases. In other words, the image line 3a is formed by changing the pitch of the image line 3a for each predetermined region of the continuous tone pattern by the image line.

  6 (b ″) to (d ″) are enlarged views of the area surrounded by the dotted lines in FIGS. 6 (b ′) to (d ′). As can be seen from the cross-sectional shape, the unit area is in the order of the highlight portion a in FIG. 6 (b ″), the intermediate portion b in FIG. 6 (c ″), and the shadow portion c in FIG. 6 (c ″). The area of the drawing line 3a is increasing. The height of the image line 3a is constant at 30 μm in any region. On the other hand, on the image line 3a of each region, the pearl print layer as the print layer 4 is formed with a height of 10 μm, and the pearl pigment 4a is oriented. Therefore, in each region in the design, per unit area The number of orientations of the pearl pigment 4a also changes, and a continuous tone pattern due to pearl luster is visible.

(Example 3)
In Example 3, since the configuration of the printing layer 3 and the printing layer 4 in Example 1 or Example 2 is the same, the third printing layer 5 is provided as a pearl printing layer between the substrate 2 and Description of the same configuration is omitted, and only different configuration will be described.

  FIG. 7 is a printed matter 1 of the present invention. As shown in FIG. 7A, a pearl printing is first performed on a base material 2 which is a light-reflective white paper by flexographic printing on a paper machine at the paper manufacturing stage. The layer is formed and provided as the third printed layer 5 as a solid pattern of “sun”, and the pearl pigment 5a emitting a metallic luster with a red color is oriented. The advantage of providing the printing layer 5 in the paper manufacturing stage is efficient because there is no need to perform printing twice for providing the pearl printing layer in the printing process. As a method of forming the pearl printing layer in the paper manufacturing stage, , You may implement by patent 2740765 etc. which this applicant disclosed previously. The printing layer 5 may be provided by a printing machine in a printing process.

  Next, on the printing layer 5, a convex image line 3 a having a “star” pattern is provided by intaglio printing. It should be noted that the “star” symbol is provided with gradation by an image line, and may be provided in the configuration of the first or second embodiment. Next, the continuous tone pattern of “N” is screen-printed to make the pearl print layer into a solid print layer 4. However, as shown in FIG. 7A, since the printing area of the printing layer 4 is provided in the area of the printing layer 3, a strong pearly luster can be visually recognized in the “N” continuous tone pattern. The print area 4 is desirably provided within the area of the print layer 3. Further, when the pearl pigment 4a of the printing layer 4 has a silver-white metallic tone and the pearl pigments of the printing layer 4 and the printing layer 5 are different, the pearl luster of the region formed by one layer of the printing layer 5, A different pearl gloss can be visually recognized in the area formed by the printing layer 4. The pearl pigment 4a and the pearl pigment 5a may be the same or different. In addition, since the configuration of the image line 3a of the printing layer 3 which is the lower layer of the printing layer 4 is the configuration of the first embodiment or the second embodiment, the “star” symbol is a continuous image gradation symbol by the image line. Further, “N” of the pearl printing layer screen-printed thereon can visually recognize the pearly luster with gradation.

It is a block diagram of the printed matter in this invention. It is sectional drawing of the convex image line shape used as the 1st printing layer of this invention. It is the schematic diagram which laminated | stacked the pearl pigment on the fine image line used as the 1st printing layer. It is explanatory drawing of the 1st Embodiment of this invention. It is explanatory drawing of the effect of this invention. It is explanatory drawing of the 2nd Embodiment of this invention. It is explanatory drawing of the 3rd Embodiment of this invention. It is explanatory drawing which improves the conventional pearl luster.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Printed matter 1b Printed matter 2 Base material 3 1st printed layer 3a Convex-shaped image line 3b Flat printed layer 4 2nd printed layer 4a Pearl pigment 5 3rd printed layer 5a Pearl pigment 10 Color sample printed matter 10a Base material 10b Black printing layer 10c Pearl printing layer 10d Pearl pigment 11 Printed matter 11a Base material 11c Pearl printing layer 11d Pearl pigment

Claims (11)

A printed matter having a gradation design on at least one of the light-reflective substrates, wherein the gradation design is formed by laminating a second printing layer on all or a part of the first printing layer, and The printing layer of 1 is convex and has a plurality of lines with light-absorbing ink, and the line width of the lines is different for each predetermined region of the gradation pattern, The line height of the line is different for each predetermined area of the gradation pattern so as to have a predetermined circumference according to the line width, and the second print layer is a pearl print layer. The gradation pattern is visible in the diffuse light region with a gradation in the printing color of the first printing layer, and in the regular reflection light region, the pearl printing layer is laminated on the first printing layer. Anti-counterfeit printed matter characterized by being glossy and visible with gradation. A printed matter having a gradation design on at least one of the light-reflective substrates, wherein the gradation design is formed by laminating a second printing layer on all or a part of the first printing layer, and 1 printing layer is convex and has a plurality of lines with light-absorbing ink, the line width and line height of the line are the same, and the line of the gradation pattern The second printed layer is formed of a pearl printed layer, and the gradation pattern is a printed color of the first printed layer in the diffused light region. An anti-counterfeit printed matter that can be visually recognized with a gradation, and that can be visually recognized with a pearly luster by the pearl print layer laminated on the first print layer in a regular reflection light region. Between the base material, the first printed layer and the second printed layer, a third printed layer is provided as a pearl printed layer, and the pearl pigments of the second and third printed layers are: The forgery-preventing printed matter according to claim 1 or 2, wherein the printed matter is the same, the same, or different. The anti-counterfeit printed matter according to claim 1, wherein the pearly luster is visible in an iris color or a metallic color. The anti-counterfeit printed matter according to claim 1, wherein the second printed layer is pearl-printed in a solid or linear shape. The anti-counterfeit printed matter according to claim 1, wherein the light absorbing ink has a hue of black, brown, dark blue, dark green, or dark purple. The forgery-preventing printed matter according to claim 1, wherein the gradation pattern includes a highlight portion, an intermediate portion, and a shadow portion. 8. The forgery-preventing printed matter according to claim 1, wherein an image line width of the image line is 100 μm or less in a highlight portion of the gradation pattern. The anti-counterfeit printed matter according to claim 1, wherein an image line width of the image line is 1 to 500 μm or less. The forgery-preventing printed matter according to claim 1, wherein an image height of the image line is 1 to 150 μm or less. The forgery-preventing printed matter according to claim 1, wherein a pigment diameter of the pearl pigment used in the pearl printing is 1/3 or more of an image line width of the image line.

Images