JP5126750B2 - Anti-counterfeit printed matter - Google Patents

Description

  The present invention relates to an anti-counterfeit printed matter that requires prevention of counterfeiting or copying of banknotes, stock certificates, securities such as bonds, various certificates and important documents.

  Anti-counterfeiting technology, known as latent image intaglio, has long been used as a technology for determining whether a banknote, stock certificate, securities such as securities, various certificates, and important documents are genuine or counterfeit. . This latent image intaglio is effective by using image lines that are raised and printed with intaglio ink or the like. For example, as shown in the printed matter 11 of FIG. 11, the image line group 13 forming the background of the print pattern 12 and the image line group 14 forming the latent image pattern 15 have a difference of 90 degrees in two directions. Arranged by a linear drawing line. When the printed surface of the printed material 11 is viewed from the front, the “P” character of the applied latent image pattern 15 cannot be easily recognized. However, as shown in FIG. Then, for example, a raised image line such as intaglio ink overlaps with the image line adjacent to the adjacent image line in the image line group 13, so that the lightness (high density) is lower than the image line 14 constituting the actual latent image portion. Become. Thereby, the “P” character of the latent image pattern 15 appears as a visible image. The feature of this technique is that it is possible to easily determine authenticity without preparing a separate determination tool.

  Further, even if it is not a bi-directional image line, it can be realized by a single line in one direction due to the difference in the height of the rising of the intaglio ink (for example, see Patent Document 1).

  Further, in Japanese Patent Laid-Open No. 5-339900, a material having various uneven shapes of various line patterns or relief patterns, and a pattern of both of them, and a constant by a different color other than the color of the material and colorless and transparent By combining any of the various line strokes or halftone dot strokes with various intervals, or both, specific characters, designs, etc. can be recognized only when observing from a specific direction. A latent image pattern formed body and a manufacturing method thereof are disclosed (for example, see Patent Document 2).

  In Japanese Examined Patent Publication No. 56-19273, a printing surface is obtained by intaglio printing an image composed of vertical and horizontal lines on a printing substrate as a method of displaying an image by inclining the printed matter. When the image is observed from directly above, a method is disclosed in which a latent image that cannot be confirmed is visualized when observed at a different angle (see, for example, Patent Document 3).

Reality 2-43747 JP-A-5-339900 JP-B 56-19273

  In the above-described conventional printed matter, the feature of this technique is an excellent technique that makes it possible to easily determine authenticity without preparing a separate determination tool. However, as in the example of the conventional latent image intaglio shown in FIG. 11, the latent image pattern 15 applied as it is may be recognized. Therefore, as shown in FIG. 13, a camouflage pattern 16 that spans the image line group 13 that forms the background of the printed pattern 12 and the image line group 14 that forms the latent image is formed so that the latent image pattern 15 cannot be recognized more. There is technology to provide. This camouflage pattern 16 can be recognized as a pattern when the print 11 is observed from the front by partially changing the line widths of the line group 13 and the line group 14 in the print pattern 12. It can be done.

  However, in this technique, the camouflage pattern 16 can be seen as it is even when the latent image pattern 15 is a visible image even when viewed from an oblique direction as shown in FIG. There was a problem that the visibility of the pattern 15 was hindered.

The anti-counterfeit printed matter of the present invention includes a first image line regularly arranged at a predetermined pitch along the first direction on the substrate, and a first image line between the plurality of first image lines arranged. The anti-counterfeit printed matter in which two image lines are arranged, wherein the first image line has at least two kinds of heights, and the second image line is a minimum image line height of the first image line. The image line height h2 is lower than h1, the first image is formed by the first image line, the second image is formed by the second image line, and the minimum image line height in the first image line is formed. A distance d2 connecting the boundary portion of the image line height h2 in the second image line from the boundary portion of the height h1 and the first object located rearward from the boundary portion of the image line height h2 in the second image line When the substrate is viewed from an angle of 90 ° at a distance d1 on the printing surface at the boundary with the printing surface in the image line, only the first image is visually recognized. angle ^{{tan -1 (h1 / d2)} } / (π / 180) ≧ θ3 ≧ {tan -1 (h1 / d2) -tan -1 {h1 / (d1 + d2)}} / (π / 180) When viewing from the area, only the second image is visible, and when the substrate is viewed from an angle of 90 ° ≧ θ4> {tan ⁻¹ (h1 / d2)} / (π / 180), Both the first image and the second image are visually recognized.

  The first image line in the anti-counterfeit printed matter of the present invention is an anti-counterfeit printed matter formed by an image line whose height changes stepwise between at least two kinds of heights. .

  In addition, the first image line in the forgery-preventing printed material of the present invention is a forgery-proof printed material formed by an image line whose height continuously changes between at least two kinds of heights. .

Further, the forgery-preventing printed matter of the present invention has the first image and the second image when the substrate is viewed from an angle of 90 ° ≧ θ4> {tan ⁻¹ (h1 / d2)} / (π / 180). It is a forgery-preventing printed matter characterized in that a third image synthesized by an image is formed.

  In addition, the second image line in the forgery-preventing printed material of the present invention is a first image obtained by changing the image area ratio stepwise or continuously in a range of 100% to 0% by the divided image line. Is an anti-counterfeit printed matter characterized by being formed as an image having a continuous tone.

  Further, the second image line in the forgery-preventing printed matter of the present invention is formed with a predetermined image line width, and when the predetermined image line width is 100%, the second image line is 100% to 0%. The anti-counterfeit printed matter is characterized in that the first image is formed as an image having a continuous tone by changing the range stepwise or continuously.

  The predetermined image line width in the second image line is a forgery-preventing printed matter in which a non-image line part is formed in at least one of the adjacent first image lines.

  The camouflage pattern does not interfere with the visibility of the latent image pattern at all because of the image line structure on the printed material in the present invention, so that the viewer who viewed the printed material from the front can see it by viewing it from an oblique direction. This makes it possible to realize a new effect that the printed pattern looks like a completely different pattern.

Explanatory drawing which shows the three-dimensional structure of this invention. Sectional drawing of the printed matter 1 shown by FIG. The top view and the perspective view of the printed matter 1 of this invention. Explanatory drawing of the printed matter 1 given an arbitrary pattern. Explanatory drawing which showed the state which looked at the printed matter 1 shown by FIG. 4 from the front. The perspective view at the time of observing the printed matter 1 shown by FIG. 5 with the viewing angle which consists of the angle area | region of angle (theta) 3 shown by FIG. Explanatory drawing which shows the three-dimensional structure of this invention. Sectional drawing of the printed matter 1 shown by FIG. The top view and the perspective view of the printed matter 1 of this invention. The top view and the perspective view of the printed matter 1 of this invention. Explanatory drawing which shows the structure of the conventional image line swelled and printed with the intaglio ink. The perspective view of the printed matter 11 shown by FIG. Explanatory drawing which shows the structure of the conventional image line which provided the camouflage pattern. The perspective view of the printed matter 11 shown by FIG. FIG. 4 is an explanatory diagram illustrating an example in which a difference in height between a low image area a1 and a high image area a2 of the main image line 3 has continuity. Explanatory drawing which showed the state which looked at the printed matter 1 shown by Fig.15 (a) visually from the front. The perspective view at the time of observing the printed matter 1 shown by FIG.15 (b) with the viewing angle which consists of the angle area | region of angle (theta) 3 shown by FIG.

  Hereinafter, the anti-counterfeit printed matter of the present invention will be described with reference to the drawings as an embodiment for carrying out the present invention. However, the present invention is not limited to the embodiments to be described below, and includes various other embodiments within the scope of the technology described in the claims.

  FIG. 1 is an explanatory diagram showing a three-dimensional structure of an image line, which is a feature of the present invention. The printed pattern 2 on the printed material 1 includes a main image line 3 configured in parallel to the longitudinal direction by a low image line portion a1 and a high image line portion a2 having different heights from the printing surface, and a main image line 3 The sub-image line 4 is swelled lower than the low image-line portion a1. Further, the main image line 3 is regularly arranged at a predetermined pitch along the longitudinal direction and the vertical direction, and the main image line 3 and the sub image line 4 are alternately arranged. That is, the image line width w2 of the sub-image line 4 arranged in the area corresponding to the non-image area of the main image line 3 is shorter than the image line width w1 of the main image line 3. As a result, in the sub-image line 4 arranged between the continuous main image lines 3, the non-image-line portions are secured on both sides in the vertical direction. The features of the present invention will be described in more detail in the sections A and B of FIG.

  FIG. 2A is a cross-sectional view showing a cross section A of FIG. From the line of sight e1 obtained by observing the printed matter 1 shown in FIG. 2A from the observation position [1] directly in front, as shown in the plan view of FIG. The width w1 is observed to be the same length. Therefore, in the observation from the line of sight e1, there is no change in the pattern composed of the main image line 3, and only the pattern composed of the sub image line 4 is observed.

  Further, when the printed matter 1 shown in FIG. 2A is observed from the oblique observation position [2], the viewing width e2 of the main image line 3 composed of the front low image area a1 as viewed from the observation position [2]. And the difference in the apparent width appears between the viewing width e3 of the main image line 3 composed of the high image line portion a2 behind the observation position [2]. This is because the height h1 up to the boundary portion p1 between the boundary line m1 and the print surface in the low image portion a1 and the boundary portion between the boundary portion m2 and the print surface in the high image portion a2 A difference in appearance is caused by the difference from the height h3 up to p2. That is, as shown in the perspective view of FIG. 3B, the viewing width e3 generated in the high image area a2 appears to be longer than the viewing width e2 generated in the boundary illustrated in the low image area a1. Yes.

  Further, as shown in FIG. 2A, the height h2 from the printing surface up to the boundary m3 with the line of sight in the sub-image line 4 is higher than the height h1 indicated in the main image line 3. Is also low. Thereby, in the observation position [2], in the observation at a predetermined angle θ1 or less obtained by using the distance d2 connecting the boundary portion m1 and the boundary portion m3, the position where the sub-image line 4 can be viewed is within the range of the viewing width e2. As shown in FIG. 3B, the main image line 3 has a positional relationship such that the sub image line 4 is shielded.

  Further, as shown in FIG. 2 (a), it is shown in the boundary portion m1 and the sub-image line 4 shown in the low image area a1 of the main image line 3 in front of the observation position [2]. When connecting the boundary m3 with the line of sight, at least a blank area where the main image line 3 and the sub image line 4 do not exist, that is, a non-image area on the printed matter 1 shown in FIG. Can be recognized.

  Further, as shown in FIG. 2 (a), from the observation position [2], the boundary portion m1 indicated by the low image area a1 of the main image line 3 in front of the observation position [2] and the observation position [2]. When connecting the boundary p2 with the printing surface of the main image line 3 at the rear of the line of sight, the non-image line portion on the printed matter 1 cannot be visually recognized. That is, at a predetermined angle θ2 or less obtained by using the distance d1 on the print surface at the boundary portion p2 between the boundary portion m3 shown in the sub-image line 4 and the print surface shown in the rear main image line 3. The non-image area on the printed material 1 cannot be visually recognized.

  On the other hand, FIG. 2B is a cross-sectional view showing a cross section B of FIG. When the printed matter 1 shown in FIG. 2 (b) is observed from the oblique observation position [2], the viewing width e3 of the main image line 3 composed of the front high image area a2 when viewed from the observation position [2], A difference in the apparent width appears between the viewing width e2 of the main image line 3 composed of the low image area a1 behind the viewing position [2]. However, the height h3 up to the boundary portion p2 between the boundary m2 between the line of sight and the print surface in the high image portion a2 and the boundary portion p1 between the boundary m1 between the line of sight and the print surface in the low image portion a1. Due to the difference from the height h1, the non-image area on the printed matter 1 cannot be visually recognized from the oblique observation position [2].

  That is, as shown in the perspective view of FIG. 3B, the rear main image line 3 appears to partially overlap the front main image line 3. As shown in the plan view of FIG. 3A, when the printed matter 1 is observed from the observation position [1], that is, from the front, the difference in the height of the rise between the low image portion a1 and the high image portion a2 is not recognized. When observed from the observation position [2], it is possible to recognize the difference in the height of the swell between the low image area a1 and the high image area a2, as shown in the perspective view of FIG.

In addition, as a condition for most clearly recognizing the difference in height between the low image portion a1 and the high image portion a2 when viewed from the observation position [2], a non-image line on the printed matter 1 is used. The angle at which the non-image portion on the printed matter 1 cannot be visually recognized from the angle θ1 at which the image can be visually recognized, that is, the angle θ1 at which the sub-image line 4 is blocked by the main image line 3 including the low image area a1. It is desirable that the angle range is an angle θ3 obtained by subtracting θ2.

  As described above, the image line width w2 of the sub-image line 4 arranged in the area corresponding to the non-image area of the main image line 3 is shorter than the image line width w1 of the main image line 3. . As a result, in the sub-image line 4 arranged between the continuous main image lines 3, the non-image area is secured on both sides in the vertical direction. When observing from the observation position [3], the conditions are the same as when observing from the oblique observation position [2] in FIG. 2 (b). When observing from the oblique observation position [3] in FIG. 2 (b) Is the same condition as observed from the oblique observation position [2] in FIG.

  FIG. 4 is an explanatory diagram of the printed material 1 with an arbitrary pattern. A printed pattern 2 is formed on the printed material 1. The specific configuration of the printed pattern 2 includes a plurality of main image lines 3 and sub image lines 4 arranged at equal intervals. The main image line 3 is a printed product 1 as shown in the perspective view of FIG. Are composed of a low image line part a1 and a high image line part a2 having different heights from the printing surface. Thereby, when the printed matter 1 is observed from the front, the height of the swell of the low image portion a1 and the high image portion a2 is not recognized.

  That is, the region formed by the high image portion a2 can be applied as the invisible image 5 to the low image portion a1 configuring the background pattern. For example, it is arranged as an invisible image 5 formed of alphabet letters “P” as shown in FIG. 4 (in the best mode for carrying out the present invention, the boundary is indicated by a dotted line for easy understanding of the position. (The dotted line itself is not printed.)

  Further, sub-image lines 4 are arranged alternately with a plurality of main image lines 3. The region having the sub-image line 4 can be applied as a visible image 6 that allows the printed material 1 to be observed from the front. For example, it is arranged as a visible image 6 having a geometric pattern as shown in FIG. 4 (in the best mode for carrying out the present invention, the boundary is expressed by a dotted line for easy understanding of the position. But the dotted line itself is not printed).

  FIG. 5 shows a state in which the printed matter 1 shown in FIG. 4 is viewed from the front. At this time, the observer cannot recognize the invisible image 5 shown in FIG. 4, but can recognize the visible image 6 shown in FIG. When the printed matter 1 shown in FIG. 5 is observed with a viewing angle composed of an angle range of the angle θ3 shown in FIG. 2, the heights of the low image area a1 and the high image area a2 as shown in FIG. As a result, a difference in the appearance of the main drawing line 3 appears.

  That is, in the printed pattern 2, the viewing width e3 of the high image area a2 appears to be longer than the viewing width e2 of the low image area a1, as shown in the perspective view of FIG. Therefore, the high image area a2 is observed at a higher density than the low image area a1. As a result, in the main image line 3 in the printed pattern 2 shown in FIG. 6, the invisible image 5 composed of the area formed by the high image line portion a2 is observed from an oblique direction so that the area becomes a visible image. Has appeared.

  On the other hand, the sub-image line 4 shown in FIG. 6 includes the position where the sub-image line 4 can be seen in the range of the visual recognition width e2 as in the perspective view of FIG. The positional relationship is such that the line 3 blocks the sub-image line 4. As a result, the visible image 6 composed of the sub-image lines 4 disappears as an invisible image. That is, when the printed material 1 is viewed from a predetermined angle, the sub-image line 4 that forms the visible image 6 becomes a blind spot due to a height difference from the main image line 3, and thus is not visually recognized. Therefore, an observer who has seen the printed material 1 from the front looks as if the pattern that has been seen so far has been replaced with a completely different pattern by viewing the printed material 1 from an oblique direction.

  Further, when the printed matter 1 shown in FIG. 5 is copied by a color copying machine, there is no difference in the height of the low image portion a1 and the high image portion a2 in the main image line 3, and it is invisible when viewed from an oblique direction. The image 5 does not appear as a visible image, or the visible image 6 does not disappear as an invisible image, and it becomes obvious at a glance that this is a copy.

  Further, the positional relationship between the main image line 3 and the sub image line 4 is not limited to the above arrangement. For example, as illustrated in FIG. 7, the main image line 3 and the sub image line 4 may be adjacent to each other. In this case as well, similar to the image line configuration shown in FIG. 1, the sub image line 4 is a bulge that is lower than the low image area a <b> 1 of the main image line 3. Further, the main image line 3 is regularly arranged at a predetermined pitch along the longitudinal direction and the vertical direction, but in the image line configuration shown in FIG. 7, the sub image line 4 is adjacent to the main image line 3. While being alternately arranged. In addition, the image line width w2 of the sub-image line 4 arranged in the area corresponding to the non-image area of the main image line 3 is shorter than the image line width w1 of the main image line 3. Thereby, in the sub-image line 4 arranged between the continuous main image lines 3, a non-image-line portion is secured on one side in the vertical direction. The features of the present invention will be described in more detail in the sections A and B of FIG.

  FIG. 8A is a cross-sectional view showing a cross section A of FIG. From the line of sight e1 obtained by observing the printed matter 1 shown in FIG. 8A from the observation position [1] directly in front, the line width of the main drawing line 3 as shown in the plan view of FIG. w1 is observed to be the same length. Therefore, in the observation from the line of sight e1, there is no change in the pattern composed of the main image line 3, and only the pattern composed of the sub image line 4 is observed.

  Further, when the printed matter 1 shown in FIG. 8A is observed from the oblique observation position [2], the viewing width e2 of the main image line 3 composed of the front low image line portion a1 as viewed from the observation position [2]. And the difference in the apparent width appears between the viewing width e3 of the main image line 3 composed of the high image line portion a2 behind the observation position [2]. This is the same as the state shown in FIG. That is, as shown in the perspective view of FIG. 9B, the viewing width e3 generated in the high image area a2 looks longer than the viewing width e2 generated in the boundary illustrated in the low image area a1. In addition, in the observation at a predetermined angle θ1 or less, the position where the sub-image line 4 can be seen is included in the range of the viewing width e2, and the main image line 3 is sub-image line as shown in FIG. 9B. The positional relationship is such that 4 is shielded.

  Further, as shown in FIG. 8 (a), it is shown in the boundary part m1 and the sub picture line 4 shown in the low picture part a1 of the main picture line 3 in front of the observation position [2]. When connecting the boundary m3 with a line of sight, at least a blank area where the main image line 3 and the sub-image line 4 do not exist, that is, a non-image area on the printed matter 1 shown in FIG. 9B is observed. Can be recognized.

  Further, similarly to the state shown in FIG. 2A, also in FIG. 8A, the boundary between the boundary portion m3 shown in the sub-image line 4 and the printing surface shown in the rear main image line 3. The non-image portion on the printed matter 1 cannot be visually recognized at a predetermined angle θ2 or less obtained using the distance d1 on the printed surface in the portion p2. In this case, the sub-image line 4 arranged between the continuous main image lines 3 has a sufficient non-image area on one side in the vertical direction, so that it is compared with the state shown in FIG. In the state shown in FIG. 8A, the observation angle [2] has a high angle.

  On the other hand, FIG. 8B is a cross-sectional view showing a cross section B of FIG. When the printed matter 1 shown in FIG. 8B is observed from the oblique observation position [2], as shown in the perspective view of FIG. 9B, the rear main image line 3 is the front main image line. 3 will cause some of them to overlap. That is, as shown in the plan view of FIG. 9A, when the printed matter 1 is observed from the observation position [1], that is, from the front, the difference in the height of the rise between the low image area a1 and the high image area a2 is recognized. However, when observed from the observation position [2], as shown in the perspective view of FIG. 9B, it is possible to recognize the difference in the height of the swell between the low image area a1 and the high image area a2. .

  In addition, as a condition for most clearly recognizing the difference in height between the low image portion a1 and the high image portion a2 when viewed from the observation position [2], a non-image line on the printed matter 1 is used. The angle at which the non-image line portion on the printed matter 1 cannot be visually recognized from the angle θ1 at which the image can be visually recognized, that is, the angle θ1 at which the sub-image line 4 is blocked by the main image line 3 composed of the low image area a1. It is desirable that the angle range is an angle θ3 obtained by subtracting θ2.

  FIG. 10 shows a state where the printed matter 1 is viewed from the front. As shown in FIG. 9, the visible image 6 can be recognized by the observer with a relationship in which the main image line 3 and the sub-image line 4 are adjacent to each other. Further, the invisible image 5 cannot be recognized. When the printed matter 1 shown in FIG. 10 is observed with a viewing angle composed of an angle region of the angle θ3 shown in FIG. 8, the low image area a1 and the high image area a2 are displayed in the same manner as shown in FIG. Differences in the appearance of the main drawing line 3 appear depending on the height. That is, in the printed pattern 2, the viewing width e3 of the high image area a2 appears to be longer than the viewing width e2 of the low image area a1, as shown in the perspective view of FIG. 9B. Therefore, the high image area a2 is observed at a higher density than the low image area a1. As a result, in the main image line 3 in the printed pattern 2 shown in FIG. 6, the invisible image 5 composed of the area formed by the high image line portion a2 is observed from an oblique direction so that the area becomes a visible image. Has appeared. On the other hand, as shown in the perspective view of FIG. 9B, the sub-image line 4 shown in FIG. 6 includes the position where the sub-image line 4 is visible within the range of the viewing width e2. The positional relationship is such that the line 3 blocks the sub-image line 4. As a result, the visible image 6 composed of the sub-image lines 4 disappears as an invisible image. Therefore, an observer who has seen the printed material 1 from the front looks as if the pattern that has been seen so far has been replaced with a completely different pattern by viewing the printed material 1 from an oblique direction.

  FIG. 15 illustrates an example in which the height difference between the low image area a1 and the high image area a2 of the main image line 3 has continuity. FIG. 15A shows a state in which the printed material is observed from the observation position [1] in front of the printed material shown in FIG. In the state of FIG. 15A, the change in height of the main image line 3 from the low image area a1 to the high image area a2 is not recognized. In addition, since the sub-image line 4 is provided with intermittent blank portions, the image area ratio changes stepwise or continuously in the range of 100% to 0%. Thereby, an arbitrary continuous tone image is visually recognized by the sub-image line 4 like the printed pattern 2 of the printed matter 1 shown in FIG.

  On the other hand, FIG. 15B shows a state where the printed matter is observed from the oblique observation position [2] shown in FIG. In the state of FIG. 15B, a continuous height change of the main image line 3 from the low image area a <b> 1 to the high image area a <b> 2 is visually recognized by the apparent overlap of the main image line 3. In addition, since the sub-image line 4 is shielded by the main image line 3, the continuous tone image provided by the continuous change of the image area ratio of the sub-image line 4 is not recognized. Accordingly, as shown in FIG. 17, when the printed pattern 2 of the printed matter 1 is observed from an oblique direction, the sub-image line 4 is shielded by the main image line 3, and further, the image lines provided in the main image line 3 are continuous. An arbitrary continuous tone image is visually recognized by a change in height.

Further, when the image line width w2 of the sub-image line 4 is formed with a predetermined image line width and the image line width w2 of the sub-image line 4 is 100%, the image line width w2 of the sub-image line 4 is 100%. From 0 to 0%, the visible image 6 may be a continuous tone image by changing stepwise or continuously.

  Although there is no limitation on the line pitch in the main image line 3 and the height of the low image area a1 and the high image area a2, the image line width w1 of the low image area a1 and the high image area a2 is 200. It is desirable that the line pitch is 300 to 800 μm, the height of the low image area a1 is 10 to 30 μm, and the height of the high image area a2 is about 20 to 60 μm. The difference between the height of the low image portion a1 and the height of the high image portion a2 is not particularly limited. However, the difference between the height of the low image portion a1 is about 10 to 50 μm. Is preferred.

  As a more specific numerical value for achieving the effect of the present invention, the height h1 of the main image line 2 from the printing surface up to the boundary m1 with the line of sight in the low image area a1 is 12 μm. 4, the height h2 from the printed surface up to the boundary m3 with the line of sight was 2 μm. Moreover, since the distance d2 connecting the boundary part m1 and the boundary part m3 is 150 μm, based on these numerical values, the angle at which the visible image 6 is made invisible is defined by an inverse trigonometric function (arc tangent). The angle θ1 at which the visible image 6 formed by the sub-image line 4 becomes a blind spot by the main image line 4 is about 4 ° or less. Furthermore, since the distance d1 on the printing surface at the boundary portion p2 between the boundary portion m3 shown in the sub-image line 4 and the printing surface shown in the rear main image line 3 is 50 μm, it is shown in the sub-image line 4. The predetermined angle θ2 obtained by using the distance d1 on the printing surface at the boundary portion p2 between the boundary portion m3 and the printing surface indicated by the rear main image line 3 is about 3 °. That is, the ideal angle region θ3 in which the visible image 5 and the invisible image 6 are completely interchanged and only the invisible image 6 can be seen satisfies the following relational expression.

  The ideal angle at which only the visible image 5 can be seen is the line of sight e1 when the printed matter 1 shown in FIG. 2 or FIG. 8 is observed from the observation position [1] directly in front, that is, at an angle of 90 ° with respect to the printing surface. is there. On the other hand, the angle range where the invisible image 6 appears as a visible image is an angle equal to or smaller than the angle θ1 at which the visible image 6 formed by the sub-image line 4 becomes a blind spot by the main image line 4. Therefore, the angle region θ4 in which the visible image 5 can be viewed satisfies the following relational expression from 90 ° to the angle θ1.

  The line width w2 and the height h2 from the printing surface of the sub-line 4 are not particularly limited as long as they satisfy the positional relationship on the cross-sectional view shown in FIG. In order to ensure a sufficient viewing angle consisting of the above-mentioned angle range, it is desirable that the height of the height is as low as possible. The print medium used for the printed material 1 is not limited in any way, such as high-quality paper or coated paper. The plate making and printing method for transferring the print pattern 2 to the print medium is also intaglio printing, screen printing, etc. There is no limitation as long as it can be raised from the surface.

1 Print 2 Print Pattern 3 Main Image Line 4 Sub Image Line 5
6 Visible image 11 Printed matter 12 Printed pattern 13 Image line group 14 Image line group 15 Latent image pattern 16 Camouflage pattern a1 Low image line part a2 High image line part A Section B Section d1 Distance d2 Distance e1 Line of sight e2 Visual width e3 Visual width e4 Viewing width m1 Boundary part m2 Boundary part m3 Boundary part p1 Boundary part p2 Boundary part w1 Drawing line width w2 Drawing line width θ1 Angle θ2 Angle θ3 Angle

Claims (7)

A second image line is arranged between the first image line regularly arranged at a predetermined pitch along the first direction on the base material and the first image line arranged in plural. Anti-counterfeit printed matter,
The first image line has at least two kinds of heights;
The second image line has an image line height h2 lower than a minimum image line height h1 of the first image line;
A first image is formed by the first image line;
A second image is formed by the second image line,
A distance d2 connecting the boundary portion of the minimum image line height h1 in the first image line and the boundary portion of the image line height h2 in the second image line;
At a distance d1 on the printing surface of the boundary portion with the printing surface of the first image line that is rearward from the boundary portion of the image line height h2 of the second image line,
When the substrate is viewed from an angle of 90 °, only the first image is viewed,
The base material is {tan ^-1 (h1 / d2)} / (π / 180) ≧ θ3 ≧ {tan ⁻¹ (h1 / d2) -tan ⁻¹ {h1 / (d1 + d2)}} / (π / 180) when viewed from the angle range of 180), only the second image is visible.
When the base material is viewed from an angle of 90 ° ≧ θ4> {tan ⁻¹ (h1 / d2)} / (π / 180), both the first image and the second image are visible. Anti-counterfeit printed matter characterized by that. 2. The forgery-preventing printed matter according to claim 1, wherein the first image line is formed by an image line whose height changes stepwise between the at least two types of heights. The forgery-preventing printed matter according to claim 1, wherein the first image line is formed by an image line whose height continuously changes between the at least two types of heights. When the base material is viewed from an angle of 90 ° ≧ θ4> {tan ⁻¹ (h1 / d2)} / (π / 180), a third synthesized by the first image and the second image The anti-counterfeit printed matter according to any one of claims 1 to 3, wherein the image is formed. The second image line is an image in which the first image has a continuous tone by changing the image area ratio stepwise or continuously in a range of 100% to 0% according to the divided image line. The anti-counterfeit printed matter according to any one of claims 1 to 4, wherein the forgery-prevented printed matter is formed as: The second image line is formed with a predetermined image line width, and when the predetermined image line width is 100%, the second image line is stepwise or continuous within a range of 100% to 0%. 5. The forgery-preventing printed material according to claim 1, wherein the first image is formed as an image having a continuous tone by changing the color of the first image. The predetermined image line width in the second image line has a non-image line part formed in at least one of the adjacent first image lines. 7. Anti-counterfeit printed matter described in the section.

Images