JP7185883B2 - anti-counterfeit printed matter - Google Patents

Description

The present invention relates to valuable printed matter such as banknotes, stock certificates, negotiable securities, transit tickets, passports, gift certificates, cards, etc., which require counterfeit prevention.

Valuable printed matter such as banknotes, stock certificates, negotiable securities, passbooks, passports, cards, and the like must not be counterfeited or tampered with due to their nature. Preventive measures include printing with special ink, holograms, threads, and fine character printing.

As a technique for preventing the forgery of such valuable printed matter, the present applicant forms by embossing at least one of various parallel line patterns or relief patterns that express patterns by partially changing the angle. On a material with an uneven shape, at least one of various line drawing lines or dot drawing lines with constant intervals is printed parallel or inclined to the part other than the above-mentioned uneven shape pattern. A latent image pattern forming body has been proposed (see, for example, Patent Document 1). In this special latent image pattern forming body, when obliquely observed under reflected light, a part of the parallel lines or the halftone dot image is hidden in an uneven shape, and the color of the parallel line or the halftone dot image is visually recognized. A latent image can be visually recognized by creating an area and an invisible area, and authenticity determination can be performed depending on whether or not the image is visually recognized.

However, since the technique of Patent Document 1 is composed of one line image line or halftone dot image line for the uneven shape, the color of the latent image visually recognized when observed at an angle is the line image line or halftone dot image. It depended on the color of the stippled lines, and could only be observed in monotonous colors.

Therefore, in order to enrich the color of the visually recognized latent image, the applicant arranged two lines of different colors in parallel with the uneven relief pattern, and tilted the base material. has proposed a technique for enriching the color of a visually recognized latent image by partially differentiating the parallel lines that are hidden by the uneven shape when observed by the user (see, for example, Patent Document 2).

Japanese Patent No. 2615401 Japanese Patent No. 5692650

The principle that the latent image pattern is visually recognized in the technique of Patent Document 1 is that when the base material is tilted and observed, due to the uneven shape, the line drawing or halftone dot drawing is hidden and not hidden. It uses the difference between FIG. 21(a) is a view showing a part of the special latent image pattern forming body of Patent Document 1, and FIG. 21(b) is a cross-sectional view taken along line α-α' of FIG. 21(a). . In FIG. 21(b), when the base material (100) is tilted and the special latent image pattern forming body is observed from the observation point (L4), the line image or halftone dot image ( 102) is formed on the slope on the front side (the hatched area in FIG. 21(b)), the color of the parallel lines or halftone dots (102) can be visually recognized, so the latent image pattern can be visually recognized without any problem. be done.

FIG. 21(c) is a view showing the special latent image pattern forming body when the positional relationship between the concave-convex shape (101) and the parallel lines or halftone dot lines (102) is shifted due to printing misalignment or the like, and FIG. 21(d). ) is a cross-sectional view taken along the line β-β' of FIG. 21(c). As shown in FIG. 21(d), when a line drawing line or halftone drawing line (102) is formed on the back side slope of the concave-convex shape (101) due to printing misalignment or the like, the base material (100) is tilted. From the actual observation point (L4), the color of the line drawing or halftone dot drawing (102) cannot be visually recognized, and the visibility of the latent image pattern that should be visually recognized is lowered.

As one solution to the above problem, as shown in FIG. 22A, there is a method of obliquely arranging parallel lines or halftone lines (102) with respect to the uneven shape (101). In this case, since the uneven shape (101) is not parallel to the parallel lines or halftone dots (102), even if the positions of the parallel lines or halftone dots (102) are shifted due to printing misalignment, etc., the uneven shape The possibility of overlapping with (101) increases.

However, as shown in FIG. 22(a), there may be a difference in overlapping of the parallel lines or halftone dots (102) on the uneven shape (101). 22(b) is a cross-sectional view taken along the γ-γ' line of FIG. 22(a), and FIG. 22(c) is a cross-sectional view taken along the δ-δ' line of FIG. 22(a). be. In FIG. 22(b), when the special latent image pattern forming body is observed from the observation point (L4), the parallel lines or halftone dots (102) are uneven (101) when viewed from the observation point (L4). 22(c), the special latent image pattern forming body is observed from the observation point (L4). When this is done, the line drawing or the halftone dot drawing (102) is formed on the slope on the far side of the uneven shape (101) when viewed from the observation point (L4). ) is not visually recognized, and the visibility of the latent image pattern is lowered.

In contrast to the technique of Patent Document 1, the technique of Patent Document 2 uses two parallel lines of different colors to make the visually recognized latent image pattern rich in color. Similarly, there is a problem of deterioration in the visibility of the latent image pattern.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to improve the visibility of a printed matter in which the latent image pattern is visually recognized when the substrate is tilted and the latent image pattern is visually recognized in rich colors.

In order to solve the above problems, the present invention has an image area on at least a part of a substrate, and the image area has a concave or convex first element having a first color and a first direction. A first element group arranged in parallel lines and divided into a latent image portion and a background portion by partially different phases of the first elements, and a second element group different from the first color A second element group in which a second element of a color is arranged in parallel in a second direction, and a third element in a third color different from the first color is arranged in parallel in a third direction and a third element group disposed in the latent image portion and/or the background portion, wherein the latent image pattern is formed by overlapping the second element and/or the third element on the first element of the latent image portion and/or the background portion. The first direction, the second direction, and the third direction are different from each other, and the latent image pattern is visible when the substrate is tilted and observed.

Further, the present invention is a forgery-preventive printed matter, wherein the second color and the third color are different colors.

Further, in the present invention, at least one of the second element and the third element has a non-element part in which no element is formed partially, and the other element is arranged to intersect the non-element part This is an anti-counterfeit printed matter characterized by:

In the anti-counterfeiting printed matter of the present invention, the second element and the third element overlapping the concave or convex first element are arranged not in parallel but in directions different from each other. To improve the visibility of the latent image pattern by overlapping with the first element, and to enrich the colors of the latent image pattern by making the colors of the second element and the third element different. can be done.

It is a figure which shows the outline|summary of the forgery prevention printed matter in this invention. FIG. 4 is a diagram showing details of an image area; FIG. 4 is a diagram showing details of a first element group; Fig. 3 shows a detail in which a first element forms a first group of elements; Fig. 2 shows a convex or concave first element; FIG. 10 is a diagram showing that latent image patterns are formed by different phases of the first element; FIG. 10 is a diagram showing details of a second group of elements; It is a figure which shows the relationship of the direction in which a 1st element and a 2nd element are arrange|positioned. FIG. 3 shows a detail of a second group of elements formed by a second element; FIG. 11 is a diagram showing details of a third element group; It is a figure which shows the relationship of the direction in which a 1st element and a 3rd element are arrange|positioned. Fig. 3 shows a detail in which a third element forms a third group of elements; FIG. 4 is a diagram showing the stacking relationship of the first element, second element and third element; It is a figure which shows the relationship of the direction in which a 1st element, a 2nd element, and a 3rd element are arrange|positioned. It is a figure which shows the principle by which a latent-image pattern is visually recognized. It is a figure which shows the structure which provided the non-element part in a part of 2nd element. It is a figure which shows the detail of a 4th element group and a 4th element. FIG. 10 is a diagram showing an overview of a forgery-preventive printed matter according to Embodiment 2; FIG. FIG. 11 shows details of a concave element; It is a figure which shows the visual recognition principle of a transmission image. FIG. 3 is a diagram showing a part of the special latent image pattern forming body of Patent Document 1; FIG. 3 is a diagram showing a part of the special latent image pattern forming body of Patent Document 1;

(Embodiment 1)
A mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments described below, and includes various other embodiments within the scope of the technical ideas described in the claims.

FIG. 1 is a diagram showing an example of a forgery-preventive printed matter (1) according to the present invention. As shown in FIG. 1, this anti-counterfeiting printed material (1) has an image area (3) on which the latent image pattern of the present invention is formed on a part of a substrate (2). As shown in FIG. 1, in areas other than the image area (3), information such as fees, characters, and other patterns may be printed by a known printing method (eg, offset printing, intaglio printing, etc.). good.

Paper sheets such as woodfree paper, coated paper, and art paper can be used as the base material (2) in the present invention. However, in order to form a latent image pattern that is visible when the substrate is tilted and observed, which is a feature of the present invention, the uneven shape formed by processing the substrate (2) is necessary. The thickness of the substrate (2) is preferably 20 μm to 1000 μm, preferably 50 μm to 300 μm. Films, plastics, composite materials thereof, and the like can also be used.

FIG. 2 shows details of the image area (3), which consists of a first group of elements (4), a second group of elements (5) and a third group of elements (6). .

(first element group)
FIG. 3 is a diagram showing details of the first element group (4). A first group of elements (4), shown in FIG. 3(a), has the same or different color on substrate (2) as shown in FIGS. 3(b) and 3(c). A plurality of concave or convex first elements (7) are arranged in a first direction (S1) at a first pitch (P1). In the present invention, the term "color" refers to colors including the concepts of hue, saturation and lightness. (Hereinafter, the color of the first element (7) is referred to as the “first color”.) In the present invention, the “first direction (S1)” means the It is the direction in which the first element (7) is arranged, and in FIG. 3A, the first direction (S1) is the direction perpendicular to the long side direction of the first element (7) be.

Also, the first element (7) may consist of a streak, a plurality of pixels, or a combination thereof. In the present invention, the "image line" means a straight line, broken line, wavy line, or the like. In the present invention, "pixels" refer to letters, numerals, symbols, figures, marks, etc. having a predetermined shape. However, when forming the first element (7) using a plurality of pixels, it is necessary to arrange the plurality of pixels in the form of an image line so that it can be visually recognized as an image line with the naked eye. This embodiment will be described using an example in which the first elements (7) formed by straight lines are arranged.

FIG. 4(a) is a diagram showing an example in which the first element group (4) is formed by the first elements (7), and FIG. 4(b) is the portion surrounded by a square in FIG. 4(a). is an enlarged view of the . As shown in FIG. 4(b), the first elements (7) are regularly arranged in the first direction (S1). Also, here, the width of the first element (7) in the first direction (S1) is defined as the width (W1) of the first element. Although the width (W1) of the first element is not limited, it is preferably formed in the range of 10 μm to 1000 μm. Although the latent image can be observed even if the width (W1) of the first element is made larger than 1000 μm, the image area (3) for forming the design of the latent image becomes large, and anti-counterfeiting printed matter is produced. It is not preferable because it is subject to constraints such as the design to be constructed, for example, other printed patterns. Moreover, if the width (W1) of the first element is less than 10 μm, it is difficult to form the uneven shape, which is not preferable.

Here, an example in which the first element (7) is formed with a uniform width (W1) of the first element will be described, but as shown in FIG. The width (W1) of the first element may differ among them.

The first pitch (P1) shown in FIG. 4(b) is not particularly limited as long as it is larger than the width (W1) of the first elements, and the first elements (7 ) is placed. This is because if the first pitch (P1) is equal to or less than the width (W1) of the first element, the first elements (7) overlap each other, and the latent image portion (8) and the background portion ( 9) cannot be formed. When the anti-counterfeiting printed matter (1) of the present invention is applied to products such as banknotes and gift certificates that people hold in their hands and observe, the first pitch (P1) is preferably formed at 1000 μm or less. . More preferably, the first pitch (P1) is formed in the range smaller than twice the width (W1) of the first element, that is, the distance between the adjacent first elements (7) It is preferable to form them with narrow intervals. When the first elements (7) are formed by reducing the first pitch (P1) in this way, the formation density of the first elements (7) formed on the substrate (2) is increased. Therefore, it is possible to improve the resolution of the latent image, thereby improving the visibility of the latent image.

FIG. 5(a) is a view showing the convex first element (7), and the height (H1) of the convex first element (7) is formed in the range of 10 to 100 μm. A latent image can be formed even if the height (H1) of the first element (7) is less than 10 μm, but the range in which the latent image can be visually recognized becomes narrower, which is not preferable. Moreover, it is possible to make the height (H1) of the first element (7) higher than 100 μm, but the base material (2) becomes thicker than necessary, which causes a problem of poor processing efficiency. I don't like it.

Similarly, FIG. 5(b) is a diagram showing the concave first element (7), and the depth (D1) of the concave first element (7) is formed in the range of 10 to 100 μm. be. Although a latent image can be formed even if the depth (D1) of the first element (7) is made shallower than 10 μm, it is not preferable because the range in which the latent image can be visually recognized is narrowed. Further, it is possible to make the depth (D1) of the first element (7) deeper than 100 μm, but the base material (2) becomes thicker than necessary, which causes a problem of poor processing efficiency. I don't like it.

FIG. 6 is a diagram showing that the latent image pattern is formed by the phase difference of the first element (7). So far, it has been explained that the first element group (4) is formed by arranging a plurality of first elements (7) in a parallel line. Specifically, the first element group (4) is , as shown in FIG. 6( a ), the phases of the first elements ( 7 ) arranged in parallel are partially different to form the characters “ABC” as a latent image pattern. . In FIG. 6(b), the dotted line indicates the range corresponding to the design of the latent image pattern shown in FIG. 6(a).

Hereinafter, the first element (7) corresponding to the pattern of the latent image pattern (6) (characters "ABC" in this embodiment) will be referred to as "latent image element (7-1)". The first element (7) corresponding to the background of the pattern is called "background element (7-2)". The pattern of the latent image pattern (hereinafter referred to as "latent image portion (8)") is formed by a plurality of latent image elements (7-1), and the background of the pattern of the latent image pattern (hereinafter referred to as "background portion (9)"). ) is formed by a plurality of background elements (7-2).

Specifically, as shown in FIG. 6B, the latent image element (7-1) is shifted upward in the first direction (S1) with respect to the background element (7-2). By being arranged, a latent image portion (8) and a background portion (9) are formed.

Here, the latent image elements (7-1) are arranged out of phase upward in the first direction (S1). good too.

In addition, although the latent image pattern is described here as an example in which the alphabet "ABC" is used, the present invention is not limited to this. to form the first element group (4).

As a method of forming the first element (7), embossing, plowing, laser processing, printing with ink, or the like can be used.

When embossing is used, a convex or concave plate is pressed against the substrate (2) to form a first element (7) that is concave or convex and of the same color as the substrate (2).

When plowing is used, the first element (7) having a concave or convex shape and the same color as the substrate (2) is formed by a cylinder roll during the paper making process on a cylinder paper machine. be.

When laser processing is used, a concave first element (7) is formed by removing part of the substrate (2) with laser light. At this time, if the output of the laser is increased, the substrate (2) is scorched and discolored, and the concave first element (7) is formed in a color different from that of the substrate (2). In addition, although the amount of substrate (2) removed at one time is small, if the output of the laser is reduced so as not to scorch the substrate (2), the concave first element (7) It is formed in the same color as the substrate (2).

When ink printing is used, the thickness of the ink forms the convex shaped first element (7). In the case of ink, the first element (7) is formed in the same color as the substrate (2) or in a different color from the substrate (2) depending on the color used.

In addition, when forming the first element (7) by plowing, laser processing, or ink, the first element is formed before forming the second element (10) and the third element (11) described later. (7) must be formed. This is because, after forming the second element (10) and the third element (11), plowing and laser processing are performed to form the second element (10) and the third element (11) into the base material. This is because it is removed from (2). Also, after forming the second element (10) and the third element (11), forming the convex first element (7) with ink, the second element (10) and the third element This is because (11) is hidden and the latent image pattern cannot be observed.

(Second element group)
FIG. 7 is a diagram showing details of the second element group (5). The second element group (5) shown in FIG. 7(a) comprises a base material (2) and a plurality of second elements (10) in a second direction (S2) at a second pitch (P2). Arranged. In the present invention, the "second direction (S2)" is the direction in which the second element (10) is arranged on the substrate (2). direction (S2) is perpendicular to the long side direction of the second element (10).

The second element (10) is arranged so as to at least partially overlap the first element (7), as shown in FIGS. 7(b) and 7(c).

FIG. 8 shows details of the arrangement of the first element (7) and the second element (10). The second element (10), as shown in FIG. 8(a), is arranged in a second direction (S2 ). The angle (α) formed by the first direction (S1) and the second direction (S2) shown in FIG. 8B is formed within the range of 0±10 degrees. A preferable range of the angle (α) formed by the first direction (S1) and the second direction (S2) is 0±1.5 degrees. This is because the smaller the absolute value of the angle (α) formed by the first direction (S1) and the second direction (S2), the easier it is to visually recognize the design of the latent image. As the angle (α) formed by the first direction (S1) and the second direction (S2) is made larger than 10 degrees, streaks occur and the visibility of the pattern of the latent image deteriorates.

The second element (10), like the first element (7), may consist of streaks, multiple pixels, or a combination thereof. This embodiment will be described using an example in which the second elements (10) formed by straight lines are arranged.

FIG. 9(a) is a diagram showing an example in which the second element group (5) is formed by the second elements (10), and FIG. 9(b) is the portion surrounded by a square in FIG. 9(a). is an enlarged view of the . As shown in FIG. 9(b), the second elements (10) are regularly arranged in the second direction (S2). The width of the second element (10) in the second direction (S2) is defined as the width (W2) of the second element. The width (W2) of the second element is at least greater than 10 μm and the upper limit is formed in the 9/10 size range with respect to the first pitch (P1). This means that if the width (W2) of the second element is greater than 9/10 with respect to the first pitch (P1), the second element (10) over the first element (7) are superimposed on each other, the contrast between the latent image portion (8) and the background portion (9) cannot be obtained, and the latent image cannot be observed. Also, if the width (W2) of the second element is less than 10 μm, the overlapping area between the first element (7) and the second element (10) is small, and the visibility of the latent image is reduced.

Here, an example in which the second element (10) is formed with a uniform width (W2) of the second element will be described, but as shown in FIG. The width (W2) of the second element may differ among them.

The second pitch (P2) is formed with substantially the same size as the first pitch (P1). Approximately the same size is a range of size from 4/5 to 6/5 with respect to the first pitch (P1). Preferably, they should have the same pitch. This is because when the first pitch (P1) and the second pitch (P2) are the same, the first element (7) and the second element (10) always overlap at a constant interval, so the latent image This is because the pattern of .

The second element (10) has a second color that is a different color than the first color. The second color is not particularly limited as long as it is a color different from the first color.

As a method for forming the second element (10), known printing methods such as offset printing, gravure printing, inkjet printing, laser processing, and the like can be used. In addition, when the second element (10) is formed by printing, the second color is the color of the ink, and when the second element (10) is formed by laser processing, the second color is the color that the base material (2) is discolored by the laser. In this case, it is necessary to adjust the output of the laser so as not to destroy the shape of the first element (7) formed on the base material (2).

(Third element group)
FIG. 10 is a diagram showing details of the third element group (6). In the third element group (6) shown in FIG. 10(a), a plurality of third elements (11) are arranged on the substrate (2) in the third direction (S3) at the third pitch (P3). Arranged. In the present invention, the "third direction (S3)" is the direction in which the third element (11) is arranged on the substrate (2). direction (S3) is perpendicular to the long side direction of the third element (11).

The third element (11) is arranged so as to at least partially overlap the first element (7), as shown in FIGS. 10(b) and 10(c).

FIG. 11 shows details of the arrangement of the first element (7) and the third element (11). The third element (11), as shown in FIG. 11(a), is arranged in a third direction (S3 ). The angle (β) formed by the first direction (S1) and the third direction (S3) shown in FIG. 11B is formed within the range of 0±10 degrees. A preferable range of the angle (β) formed by the first direction (S1) and the third direction (S3) is 0±1.5 degrees. This is because the smaller the absolute value of the angle (β) formed by the first direction (S1) and the third direction (S3), the easier it is to visually recognize the design of the latent image. As the angle (β) formed by the first direction (S1) and the third direction (S3) is made larger than 10 degrees, stripes occur and the visibility of the pattern of the latent image deteriorates.

The third element (11), like the first element (7), may consist of streaks, multiple pixels, or a combination thereof. This embodiment will be described using an example in which the third element (11) composed of straight lines is arranged.

FIG. 12(a) is a diagram showing an example in which the third element group (6) is formed by the third element (11), and FIG. 12(b) is the portion surrounded by a square in FIG. 12(a). is an enlarged view of the . As shown in FIG. 12(b), the third elements (11) are regularly arranged in the third direction (S3). The width of the third element (11) in the third direction (S3) is defined as the width (W3) of the third element. The width (W3) of the third element is at least greater than 10 μm and the upper limit is formed in the 9/10 size range with respect to the first pitch (P1). This means that if the width (W3) of the third element is greater than 9/10 with respect to the first pitch (P1), the third element (11) over the first element (7) are superimposed on each other, the contrast between the latent image portion (8) and the background portion (9) cannot be obtained, and the latent image cannot be observed. Also, if the width (W3) of the third element is less than 10 μm, the overlapping area between the first element (7) and the third element (11) is so small that visibility of the latent image is reduced.

Here, an example in which the third element (11) is formed with a uniform width (W3) of the third element will be described, but as shown in FIG. The width (W3) of the third element may differ among them.

The third pitch (P3) is formed with approximately the same size as the first pitch (P1). Approximately the same size is a range of size from 4/5 to 6/5 with respect to the first pitch (P1). Preferably, they should have the same pitch. This is because when the first pitch (P1) and the third pitch (P3) are the same, the first element (7) and the third element (11) always overlap at a constant interval, so the latent image This is because the pattern of .

The third element (11) has a third color that is a different color than the first color. The third color may be any color different from the first color, and is not particularly limited. is preferably

As a method for forming the third element (11), known printing methods such as offset printing, gravure printing, inkjet printing, laser processing, and the like can be used. In addition, when the third element (11) is formed by printing, the third color is the color of ink, and when the third element (11) is formed by laser processing, the third color is the color that the base material (2) is discolored by the laser. In this case, it is necessary to adjust the output of the laser so as not to destroy the shape of the first element (7) formed on the base material (2).

FIG. 13 shows a configuration in which a second element (10) and a third element (11) are formed on a first element (7). In 14(b), the second element (10) and the third element (11) are formed on the concave first element (7). As shown in Figures 13(a) and 13(b), the first element (7), the second element (10) and the third element (11) should be arranged to cross each other. be. In other words, the first direction (S1) in which the first element (7) is arranged, the second direction (S2) in which the second element (10) is arranged and the third element (11) are arranged in different directions (S3).

FIG. 14 is a diagram showing the relationship among the first direction (S1), second direction (S2) and third direction (S3). In FIG. 14(a), the second element (10) is arranged at an angle (α) formed by the first direction (S1) and the second direction (S2) with respect to the first element (7). ing. Also, the third element (11) is directed to the first element (7) in a direction different from the angle (α) formed by the first direction (S1) and the second direction (S2). They are arranged at an angle (β) formed by the direction (S1) and the third direction (S3).

On the other hand, in FIG. 14(b), the second element (10) is inclined with respect to the first element (7) by an angle (α) formed by the first direction (S1) and the second direction (S2). are placed. Also, the third element (11) is directed to the first element (7) in the same direction as the angle (α) formed by the first direction (S1) and the second direction (S2). It is arranged at an angle (β) formed by (S1) and the third direction (S3).

What is important here is the angle (α) formed by the first direction (S1) and the second direction (S2), and the angle (β ) are different angles, and may be different angles in different directions as shown in FIG. 14(a) or different angles in the same direction as shown in FIG. 14(b).

(latent image pattern)
Next, the principle of visually recognizing the latent image pattern will be described. The basic principle of visually recognizing the latent image pattern of the present invention is the same as the techniques of Patent Documents 1 and 2.

FIG. 15(a) is a view showing the forgery-preventive printed matter (1) of the present invention and the viewpoint from which the forgery-preventive printed matter (1) is observed. 1 observation point (L1), and a second observation point (L2) is a viewpoint when the anti-counterfeiting printed matter (1) is tilted and observed.

FIG. 15(b) is an enlarged view of part of the image area (3) when the anti-counterfeit printed matter (1) is observed from the first observation point (L1). As described above, the first element (7) is formed in the image area (3) of the present invention, in which the latent image element (7-1) and the background element (7-2) are formed. there is In FIG. 15(b), the second element (10) and the third element (11) are arranged so as to overlap the latent image element (7-1) and the background element (7-2).

When the image area (3) is observed from the first observation point (L1), the color of each element is visually recognized as it is, so the latent image pattern is not visually recognized.

FIG. 15(c) is a cross-sectional view taken along line X-X' of FIG. 15(b), and FIG. 15(d) is a cross-sectional view taken along line Y-Y'.

In FIG. 15(c), the third element (11) overlaps half of the surface of the convex shape with the top of the convex shape of the background element (7-2) as a boundary, and the background element (7-2) is A second element (10) is placed on the unformed substrate. In the present invention, the “top portion of the convex shape” means the highest portion of the first elements (7, 7-1, 7-2) formed in a convex shape.

On the other hand, in FIG. 15(d), the second element (10) overlaps half of the surface of the convex shape with the top of the convex shape of the latent image element (7-1) as a boundary. A third element (11) is placed on the substrate on which -1) is not formed.

When these are observed from the second observation point (L2), the surface of the convex shape on the front side can be observed with the apex of the convex shape as a boundary, but the surface on the back side is the convex shape. Observation is not possible because it is a blind spot. Therefore, when observed from the second observation point (L2), only the third element (11) overlapping the surface of the convex shape on the front side in FIG. can be observed, and in FIG. 15(d), only the second element (10) overlapping the convex surface on the near side can be observed. In addition, when observing from the second observation point (L2), the observable range of the convex surface slightly differs depending on the first pitch (P1) and the width (W1) of the first element. Yes.

FIG. 15(e) is a diagram showing a case where a part of the image area (3) shown in FIG. 15(b) is observed from the second observation point (L2). Although the background element (7-2) and the latent image element (7-1) are formed side by side here, the observed colors are different. Specifically, when the background element (7-2) is observed from the second observation point (L2), the third Similarly, the latent image element (7-1) is observed in a second color that is the color of the second element (10), and the background element (7-2) forming the background portion (9) and , the latent image elements (7-1) forming the latent image portion (8) are observed in different colors, so that the adjacent background portion (9) and latent image portion (8) are visually recognized as different colors, and the color The latent image pattern is visually recognized due to the difference in the .

The appearance of this color depends on the pitch at which the first element (7), the second element (10) and the third element (11) are arranged, the first direction (S1), the second direction (S2 ) and the third direction (S3), the third If the 2nd element (10) and the 3rd element (11) overlap differently, a color difference occurs between the adjacent background portion (9) and the latent image portion (8), and the latent image pattern can be visually recognized.

In addition, in the present invention, since the directions of the second element (10) and the third element (11) arranged on the first element (7) are different from each other, one of the elements is printed. Even if it does not overlap the latent image element (7-1) due to misalignment or the like, the visibility of the latent image pattern is improved by overlapping the other element.

As in Patent Document 2, when arranging two parallel drawing lines in parallel, it is necessary to arrange the two parallel drawing lines adjacently, which requires high printing accuracy. can improve the visibility of the latent image pattern without requiring high printing precision.

Further, according to the present invention, the visibility of the latent image pattern can be improved by setting the pitch and the direction of arrangement of the second elements (10) formed on the first elements (7). The visibility of the latent image pattern can be further improved by setting the pitch and direction of arrangement of the elements (11).

(non-element part)
Here, when the second color of the second element (10) and the third color of the third element (11) are different colors when viewed from the observation point (L1), the elements Color mixture occurs in the area where the . Although this does not affect the visibility of the latent image pattern, it is possible to adopt the configuration shown in FIG. 16 in order to prevent the occurrence of stripes.

FIG. 16(a) is a diagram showing the arrangement of the second element (10), and FIG. 16(b) is an enlarged view of the portion surrounded by a square in FIG. 16(a). As shown in the portion surrounded by the dotted line in FIG. 16(b), the second element (10) has a portion where no element is formed (hereinafter referred to as "non-element portion (12)"). FIG. 16(b) shows an example in which the second element (10) is formed by the image line, and the non-element part (12) in this case is an area where the image line is not formed partially.

FIG. 16(c) is a diagram showing the relationship between the second element (10) and the third element (11) in this configuration. The third element (11) is arranged to intersect with. With this configuration, it is possible to prevent the occurrence of stripes due to the mixture of the second color and the third color.

In this form, it is preferable that the area of the non-element portion (12) and the area of the third element (11) intersecting the non-element portion (12) are equal. Note that when the area of the non-element portion (12) is larger than the area of the third element (11) intersecting the non-element portion (12), the non-element portion (12) is visually recognized, so the latent image pattern is visually recognized. The area of the non-element portion (12) is larger than the area of the third element (11) intersecting the non-element portion (12) as long as it does not affect the visibility of the latent image pattern. may In addition, when the area of the non-element portion (12) is smaller than the area ratio of the third element (11) intersecting the non-element portion (12), color mixture occurs at the boundary portion, but stripes do not occur. If so, the area of the non-element portion (12) may be smaller than the area ratio of the third element (11) intersecting the non-element portion (12).

Although the example in which the second element (10) has the non-element portion (12) has been described here, the third element (11) may have the non-element portion (12), and the second element (10) may have the non-element portion (12). At least one of the element (10) and the third element (11) should have the non-element part (12).

In the present embodiment, an example in which an image area is formed by three element groups of the first element group (4), the second element group (5), and the third element group (6) has been described. This is the minimum required configuration in the present invention, and a plurality of element groups may be provided as further element groups. Here, an example in which a fourth element group is further provided will be described.

(Fourth element)
FIG. 17 is a diagram showing details of the fourth element group (13). In the fourth element group (13) shown in FIG. 17(a), a plurality of fourth elements (14) are arranged on the substrate (2) in the fourth direction (S4) at the fourth pitch (P4). Arranged. In the present invention, the "fourth direction (S4)" is the direction in which the fourth element (14) is arranged on the substrate (2). The direction (S4) is perpendicular to the longitudinal direction of the fourth element (14).

FIG. 17(b) is a diagram showing an example in which the fourth element group (13) is formed by the fourth element (14), and FIG. 17(c) is the square enclosed in FIG. It is the figure which expanded the part. The conditions for the width (W4) and the fourth pitch (P4) of the fourth element are the same as those for the second element (10) and the third element (11), so descriptions thereof will be omitted.

Also, the fourth direction (S4) in which the fourth element (14) is arranged is not particularly limited, and includes the first direction (S1), the second direction (S2) and the third direction (S3). may be the same direction as any of, or may be different from all. However, when they are arranged in the same direction as one of the directions, it is necessary to shift the phases of the elements arranged in the same direction and the arrangement so that they do not overlap completely.

The fourth element (14) has a fourth color that is a different color than the first color. The fourth color is not particularly limited as long as it is a color different from the first color. It is preferable that the colors are different from each other.

Since the method of forming the fourth element (14) is the same as that of the second element (10) and the third element (11), the explanation is omitted.

By providing the fourth element (14) in this way, the visibility of the latent image pattern can be further improved, and when the fourth color is a color different from the second color and the third color It is possible to make the colors of the latent image pattern even richer.

(Embodiment 2)
Further, as another embodiment of the present invention, a form provided with a concave element group (15) will be described below. Note that the forgery-preventive printed matter (1) of Embodiment 2 includes a first element group (4), a second element group (5), and a third element group (6) as in Embodiment 1. However, since the details are the same as those of the first embodiment, description thereof is omitted. Moreover, the same applies to the effects.

FIG. 18 is a diagram showing the details of the concave element group (15), and as shown in FIG. A plurality of recessed elements (16) having higher permeability than the base material are formed in the base material.

FIG. 18(b) is a cross-sectional view taken along line XX' of FIG. 18(a), showing a first element between a plurality of first elements (7) arranged in the first direction (S1). A circular concave element (16) is formed on the substrate (2) on which the element (7) of As the thickness becomes thinner, the permeability becomes higher.

In addition, the recessed element group (15) forms a transparent image by arranging a plurality of recessed elements (16). The transmissive image referred to here is the letter "T", but it is not limited to this, and the recessed elements (16) may be arranged according to the pattern desired to be expressed as the transmissive image.

Although an example in which the recessed element (16) is circular has been described here, it may be formed by an image line as shown in FIG. 18(c).

Figure 19 shows a detail of the concave element (16). The width of the concave element (16) in the first direction (S1) is defined as the width (W5) of the concave element. The width (W5) of the concave elements is less than the base distance (U1) between the first elements (7) which is the first pitch (P1) minus the width (W1) of the first elements. is not subject to any particular restrictions. For example, if the first pitch (P1) is 1000 μm and the width (W1) of the first element is 400 μm, the width (W5) of the concave element should be less than 600 μm.

The range of depth of the concave element (16) is not particularly limited as long as it does not penetrate the substrate (2).

Also, by varying the area ratio and depth of the recessed elements (16), it is possible to express a transmitted image with gradation of light and dark.

FIG. 20 is a diagram showing the principle of viewing a transparent image. When observing the anti-counterfeit printed matter (1) of the present embodiment from the observation point (L3) where the transmitted light from the light source (17) shown in FIG. Due to the high transmittance, the areas in which the concave elements (16) are formed are brightly visible. Therefore, as shown in FIG. 20(b), the letter "T", which is the transmission image formed by the concave element (16), is visible.

By adopting the configuration of Embodiment 2, in addition to the fact that the latent image pattern can be visually recognized when the substrate is tilted and observed in Embodiment 1, there is a further effect that different transmitted images can be visually recognized under transmitted light. becomes possible.

1 anti-counterfeit printed matter 2 base material 3 image area 4 first element group 5 second element group 6 third element group 7 first element 7-1 latent image element 7-2 background element 8 latent image portion 9 background Part 10 Second element 11 Third element 12 Non-element part 13 Fourth element group 14 Fourth element 15 Concave element group 16 Concave element 17 Light source 100 Base material 101 Concavo-convex shape 102 Line drawing or halftone dot drawing S1 First direction S2 Second direction S3 Third direction S4 Fourth direction W1 First element width W2 Second element width W3 Third element width W4 Fourth element width W5 Concave element width P1 first pitch P2 second pitch P3 third pitch P4 fourth pitch L1 first observation point L2 second observation point L3 third observation point L4 observation point U1 bottom distance

Claims (2)

having an image area on at least a portion of the substrate;
In the image area, concave or convex first elements having a first color are arranged in parallel lines in a first direction, and phases of the first elements are partially different to form a latent image. a first element group divided into an image portion and a background portion;
a second element group in which second elements of a second color different from the first color are arranged in parallel lines in a second direction;
at least a third element group in which third elements of a third color different from the first color are arranged in a line in a third direction,
the second color and the third color are different colors,
the first direction, the second direction and the third direction are different,
A latent image pattern is formed by overlapping the second element and the third element on the first element of the latent image portion and/or the background portion,
One element of the second element and the third element has a non-element part in which no element is partially formed, and the other element is arranged to intersect the non-element part,
A forgery-preventive printed material, wherein the latent image pattern is visible when the substrate is tilted and observed. 2. The anti-counterfeit printed matter according to claim 1, wherein the area of the non-element portion of the one element and the area of the other element are equal in the overlap region where the second element and the third element intersect.

Images