EA010332B1 - Security device - Google Patents

Abstract

A public recognition security device comprises a planar substrate providing first and second areas. Each area has a printed, raised line structure of spaced apart lines with a background filling the spaces between the lines. The visual colour appearance of the lines (1a, 2a) is different to that of the background (1b, 2b) and the visual colour appearances of the respective backgrounds (1b, 2b) and/or of the respective line structures of the two areas differ from one another. When viewed by an observer perpendicularly to the substrate, the resultant visual colour appearances of the two areas is a combination of that of the respective background and raised line structure of each area and appear substantially the same. When viewed by an observer at an oblique angle, the resultant visual colour appearances of the two areas differ from one another due to at least part of the backgrounds being obscured by the corresponding raised line structures, the change in the resultant visual colour appearances of the two areas being indicative of the device authenticity.

Description

FIELD OF THE INVENTION

The present invention relates to security devices, in particular to devices for protecting documents from counterfeiting, which are used to protect against copying and counterfeiting of products, such as security documents, including banknotes, traveler's checks, bonds, stock certificates, identification cards, passports, security passes, credit cards, debit cards, etc.

State of the art

Patent Document OV-L-2241668 describes a method for producing latent images by embossing a paper blindly or embossing a metal paint region. Such latent images are detected due to the contrast when tilting the image.

Patent document EP 0194042 B1 describes a latent image system that is applied during foil stamping. Such line structures also create a change in contrast.

Patent document I8-A-4124947 discloses a method for producing a graphic pattern by creating a system or grid of lines that is substantially uniform, at least in predetermined portions of the field, and contains relatively disjoint and non-contiguous lines located nearby. The ratio of the height and pitch of the colored bulges forming the lines is chosen so that when viewing the pattern at an angle less than the specified boundary angle of inclination, the base of the troughs between the colored bulges or peaks is invisible.

Patent Document CA-A-1019012 describes a latent image system that requires the use of two colors of background lines that match the structure of the embossing lines. This creates an image due to the overlapping of certain parts of the picture when viewed from a certain indirect angle. However, this approach cannot be used to obtain reproducible effects from document to document using standard manufacturing techniques, since a very high degree of combination is required. This cannot be obtained with the help of equipment that is currently used to produce security documents. Instead of high convex line structures, transparent intaglio printing of lines can be used, or, less desirable, pigmented ink for intaglio printing is proposed. It is established that the use of pigmented ink for gravure printing to obtain embossed lines noticeably reduces the effect, and also gives poor reproducibility of the tone of the background lines and embossed lines.

Patent document EP 0642933 A1 uses a similar approach (as in CA-A-1019012), in which a corrugated surface is first obtained by intaglio printing, which is then sealed with a ruled structure by offset printing. When viewed from an indirect angle, latent images appear. In this case, the structures of the relief lines are used as a way to obtain a wavy surface. The disadvantage of this method also lies in the difficulty of obtaining a good combination of offset and intaglio printing, so it is impossible to achieve reproducibility of hidden images from document to document.

Patent Document ϋδ-Α-4033059 describes a system capable of producing effective images by intaglio printing. The pattern area of the relief line structures forms an image that is hidden within the relief background area. This area is sealed with a background pattern with which the ink contrasts. The image is not easy to see if viewed in the direction normal to the surface, but when viewed at an indirect angle, the image can be seen.

EP-A-801604 describes a method for reinforcing an embossed security element using a printed image or a grid of lines.

The international publication ^ 0-Α-2004/022355 also discloses a protective device in which the embossed lines are coated, so that the device looks different when viewed from normal and at an indirect angle. The application describes complex variations of this idea, which use different line structures in combination with the same coatings, so that different areas exhibit different color effects. Although the security devices in question may make it difficult to fraudulently copy a document bearing this protection, it is also difficult to establish the authenticity of the document because the color changes are rather weak.

Patent Document I8 2003151246 describes a security device that comprises a sealed surface and an incompletely sealed surface, both surfaces being sealed with the same ink. An incompletely sealed surface appears because the thickness of the film of paint in this region is substantially less than in the sealed region.

The challenge is to create a security device that is not only difficult to accurately copy, but so that with its help, the person viewing the document can easily establish its authenticity.

SUMMARY OF THE INVENTION

In accordance with a first aspect of the present invention, there is provided an anti-counterfeiting device comprising a flat base on which first and second areas are provided, each area containing a structure of printed, spaced relief lines and a background filling in the gaps between the lines, with a visual color the appearance of the lines is different from the visa

- 1 010332 the background color view of the background, and the visual color views of the corresponding backgrounds and / or the corresponding line structures of these two areas are different from each other, while the visual color views of the backgrounds and line structures, as well as the shape of these line structures are selected so that

a) when viewing the device with the naked eye of the observer in the direction perpendicular to the plane of the base, the resulting visual color views of the two areas are obtained from a combination of visual color views of the corresponding background and the structure of the relief lines of each area, and look essentially the same, and

b) when viewing the device with the naked eye of the observer at a first indirect angle to the plane of the base, the resulting visual color views of the two areas differ from each other due to at least partial overlapping of the backgrounds with the corresponding structures of the relief lines, while the difference between the resulting visual color views of the two areas is a sign of the authenticity of the device.

In accordance with a second aspect of the present invention, there is provided an anti-counterfeiting device comprising a flat base on which first and second regions are provided, each region comprising a structure of printed, spaced relief lines and a background filling the gaps between the lines, while the color is visual the appearance of the lines differs from the visual color appearance of the background, and the visual color views of the corresponding backgrounds and / or the corresponding line structures of these two regions differ from each other while the visual color types of backgrounds and line structures, as well as the shape of these line structures are selected so that

a) when viewing the device with the naked eye of the observer in a direction perpendicular to the plane of the base, the first region represents the first resulting visual color view, and the second region represents the second resulting visual color view, different from the first, and each resulting visual color view is obtained from a combination of visual color views corresponding background and structure of relief lines, and

b) when viewing the device with the naked eye of an observer at a first indirect angle to the plane of the base, the first region represents essentially the second resulting visual color view, and the second region represents essentially the first resulting visual color view due to at least partial overlap backgrounds corresponding structures of embossed lines, while the difference between the resulting visual color types of the two areas is a sign of the authenticity of the device.

In accordance with a third aspect of the present invention, there is provided an anti-counterfeiting device comprising a flat base on which first and second areas are provided, one area comprising a structure of printed, spaced relief lines and a background filling in the gaps between the lines, with a visual color the appearance of the lines differs from the visual color view of the background, and the other region has a visual color view that is essentially unchanged at all viewing angles, while the visual color view of the background and a relief structure of the lines of one field and the shape of said line patterns are chosen so that

a) when viewing the device with the naked eye of the observer in a direction perpendicular to the plane of the base, the resulting visual color views of the two areas are essentially the same, and

b) when viewing the device with the naked eye of the observer at a first indirect angle to the plane of the base, the resulting visual color views of the two areas are different from each other, and the difference is a sign of the authenticity of the device.

It is clear that you can use a combination of the color of the structures of the embossed lines and the background color to solve the above problem of creating a security document that is difficult to copy, but it is easy to verify its authenticity if you consider the way the line structures and colors interact in this particular area or in each separate area.

In contrast to the approach described in international publication 2004/022335, the present invention considers the relationship between the colors of individual regions, determined by the background color and the color of the structure of the embossed lines, as well as how these colors can relate to each other.

The advantage of the first aspect is that for two areas that look essentially the same when looking at the device in the normal direction, but different when viewed from an angle, the appearance changes in a noticeable way, since the areas now look different in relation to each other to a friend. This change turns out to be much more noticeable than if, when changing the type of the region, there was nothing with which it could be compared.

In some cases, the visual color view of an area is determined by the solid color field that represents the area, but in other examples, the visual color view may appear in the form of stripes or another pattern.

In a typical case, the structures of embossed lines are applied to the substrate using gravure printing, but

- 2 010332 there are other options that include screen printing with a tactile effect, thermography, inkjet printing with a tactile effect.

The visual background color may include the natural color of the substrate or paint that has been applied to the substrate, for example, by printing, coating, spraying or transferring. It can be imprinted with intaglio printing or without intaglio printing, with a constant tone, hatching, or a similar, optically invariant method.

In a typical case, the structures of the relief lines are formed by straight lines, but these lines can be wavy, curved; and although usually such lines are continuous, they can be intermittent.

As stated at the beginning, security devices of the present invention can be used to protect a wide range of securities.

List of drawings

Some examples of protection devices of the present invention will be described below with reference to the accompanying drawings (not to scale), in which FIG. 1a shows a first example of a protection device (top view);

FIG. 1b and 1c schematically depict partial cross-sections along the indicated arrows of regions 1 and 2 of the device of FIG. 1a;

FIG. 16 and 1e are an oblique view of regions 1 and 2, respectively;

FIG. 1ί is an indirect angle view of the protection device as a whole;

FIG. 2a-2G are views similar to FIG. 1 a-1G, but related to the second example;

FIG. 3a-3g are views similar to FIG. 1a-1G, but related to the third example;

FIG. 4a is a modified version of a third example of a protection device (view in the normal direction);

FIG. 4b is an indirect angle view of the device of FIG. 4a;

FIG. 5a-5G are views similar to FIG. 1a-1G, but related to the fourth example;

FIG. 6 schematically shows a structure of a modified view of a fourth example;

FIG. 7a, 7b, and 7c depict a fifth example (view in the perpendicular direction and views at two different indirect angles);

FIG. 8a and 8b are views similar to FIG. 4a and 4b, but related to the sixth example;

FIG. 9a and 9b, 9c and 96 are views similar to FIG. 4a and 4b, but relating, respectively, to the seventh example and the modified seventh example;

FIG. 10a and 10b schematically show a cross-section of line structures with different line widths and different line spacing;

FIG. 11a and 11b schematically show a cross section of line structures with different line heights;

FIG. 12a - 1211 depict various arrangements of individual areas on a document;

FIG. 13a and 13b show suitable structures of parallel and non-parallel lines;

FIG. 14a and 14b show various configurations of line structures and background colors;

FIG. 15a and 15b are views similar to FIG. 4a and 4b, and illustrate a modified form of the third example, and FIG. 16a and 16b are views similar to FIG. 4a and 4b, but related to the eighth example.

Information confirming the possibility of carrying out the invention

In several examples cited in this list, it is assumed that when looking at the device in a direction normal or perpendicular to its plane, two specific areas will appear to match in color. This effect can be interpreted as subjective, and here in all examples where it is argued that the two areas are the same in color, this should be understood as an approximate coincidence when the two areas are essentially the same color.

In the other examples described, it is also assumed that when viewed from an indirect angle, the color that appears in a certain area will be approximately the same as the color of the relief lines in this area. It should be noted that in practice, the background color and the structure of the embossed lines, as well as the opacity of the paint, the structure of the embossed lines will affect the color appearing at a given angle.

Also, with regard to all the above examples, it is important to remember that the full height of the embossed line will depend on the degree of embossing and the amount of ink transferred.

In a typical case, it is desirable that the line structures and line widths are in the range of 30-600 microns, preferably 50-500 microns, even more preferably 80-400 microns and most preferably 80-300 microns. Typical embossed printing should be 3070%, preferably 35-65%, and most preferably 40-60%.

Example 1 (Fig. 1). Switching colors "black / white".

In the first region 1, the white lines obtained by intaglio printing (hereinafter “embossed”), lines 1A are imprinted on a black background 1B so that when viewed along the normal, they look

- 010332 essentially, as well as the second region 2 with black embossed lines 2A printed on a white background 2B, as shown in FIG. 1a, 1b, 1s. Depending on the structure of the lines of the regions under consideration, they should both look either uniformly gray or as a series of black and white lines. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate 3, or it may be the color of the substrate itself. When viewing both areas at an angle, only convex print elements will be visible, and a color change will be observed, so that the first area appears white and the second black, as shown in FIG. 16, 1e, 1ί.

Example 2 (Fig. 2). Switching colors.

In the first region 1, the embossed lines 4 of a certain color (A) are imprinted against the background 5 of a different color (B) so that they look essentially the same as the second region with embossed lines 6 of the color (B) printed on the background 7 colors (A) as shown in FIG. 2a, 2b, 2c. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate 3, or it may be the color of the substrate itself. When viewed at an angle, only convex print elements will be visible, so that the first region appears colors (A) and the second region colors (B), as shown in FIG. 26, 2e, 2ί.

Example 3 (Fig. 3 and 4). Frontal color matching (creating the impression of one color) mismatch (two different colors).

The first region 1 has a background color (A) and embossed color lines (B). The second region has a background of color (C), which may or may not be identical or similar to color (B), and embossed lines of color (Ό), which may or may not be identical or similar to color (A) as shown in FIG. 3 a. Visually, when viewed in the direction of the normal, the first and second regions approximately coincide in color, so that they appear as a continuous region, a uniform shade of the same color (E), as shown in FIG. 3a, 3b, 3c. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate 3, or it may be the color of the substrate itself. When viewed at an angle, only convex print elements will be visible, so that in the first region, color (E) is replaced by color (B), and in the second region, color (E) is replaced by color (Ό), i.e. the color of the embossed lines as shown in FIG. 36, 3e, 3ί.

Relatively thin relief lines and intervals between lines can enhance this effect. The width range of the embossed lines can be 50-250 microns, and preferably 80-250 microns, while filling with embossed printing should be 30-70%. The combination of violet embossed lines on a yellow background in region 1 and yellow embossed lines on a violet background in region 2 can give the effect of color matching when viewed in the normal direction when lines with a width of 80 μm are used with an interval between lines of 100 μm.

As an example, region 1 could have a red background with green embossed lines and, when viewed in the normal direction, would look brown. Area 2 could have a blue background with orange embossed lines and when viewed in the direction of the normal would also look brown. Then, when viewed at an indirect angle, these two areas would turn out to be of a different color (region 1 would turn green, and region 2 would turn orange).

For each region, as the ratio of the width of the embossed line to the interval between the lines decreases, when viewed in the normal direction, the color becomes less similar to the color of the embossed lines and more similar to the background color. For example, an area with a color background (A), but with 95% coverage with embossed color lines (B), when viewed in the normal direction, will assume a color approaching color (B). Conversely, a region with a background of color (A) and with 5% coverage with convex colored lines of color (B) will, when viewed in the direction of the normal, assume a color approaching color (A).

As an example, an area with blue embossed lines 200 microns wide and intervals between lines of 135 microns (i.e. when filled with a relief of approximately 60%) printed on a yellow background, when viewed in the direction of the normal in color, will appear blue-green (color E) (i.e., the color is closer to the color of the relief lines than the background) and blue when viewed at an angle. However, an area with blue embossed lines with a width of 135 μm and intervals between lines of 200 μm (i.e. when filled with a relief of approximately 40%) printed on a yellow background, when viewed in the direction of the normal in color, will appear yellow-green (i.e. the color is closer to the background color) and will change color to blue when viewed at an angle.

This phenomenon can be used to improve the color matching of the two areas. For example, there is region 1 and region 2, each of which contains embossed lines with a width of 140 microns with an interval between lines of 140 microns. The combination of blue embossed lines and a yellow background in region 1 when viewed in the normal direction would give a blue-green color with a higher blue content than the combination of yellow embossed lines and a blue background in region 2. However, if in region 2 we take a line width of 120 μm at range of 160 μm, then when viewed in the normal direction, this area will appear more blue, and the color matching will be improved. Similarly, to further improve color matching, you can adjust the line width and line spacing in area 1.

Example 4 (Fig. 5 and 6). Frontal color matching (creating the impression of stripes) - mismatch (two different colors).

- 4 010332

The first area has a color background (A) and embossed color lines (B). The second area has a color background (C) and embossed color lines (Ό). Color (C) is essentially similar in appearance to color (B), how it looks on the background (A), and color (A), essentially, in appearance is similar to color (Ό), how it looks on the background (C) . When viewed in the direction of the normal, the first and second areas are essentially indistinguishable, and appear as a series of stripes. This is shown in FIG. 5a, 5b, 5c. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate, or it can be the color of the substrate itself. When viewed at an angle, these two areas change color, respectively, to a solid color (B) and (Ό) - the color of the embossed lines, as shown in FIG. 56, 5e, 5 £.

Larger embossed lines and intervals can enhance this effect. The width of the relief lines can be in the range of 150-450 microns.

For example, violet embossed lines with a width of 300 microns, following with an interval of 400 microns, on a yellow background in region 1, when viewed in the normal direction, will look like alternating purple and yellow stripes. Yellow embossed lines with a width of 400 microns, following with an interval of 300 microns, on a purple background, when viewed in the direction of the normal, will also look like alternating purple and yellow stripes. These two areas will appear to be essentially similar if the color of the violet embossed lines on the yellow background in area 1 is similar to the color of the violet background in area 2, and the color of the yellow embossed lines on the violet background in area 2 is similar to the color of the yellow background in area 1. When viewed at an angle, region 1 will appear purple and region 2 will appear yellow.

In order to give the impression of a continuous transition of lines from the first region to the second region when viewed in the normal direction, the relief lines can be slightly shifted so that the position of the relief lines of the first region does not coincide with the position of the relief lines of the second region (but coincides with the position of the gaps between the lines, as shown in Fig. 5a).

Alternatively, the position of the embossed lines in the first and second regions may be the same, as shown in FIG. 6, especially if it is not required that when viewed from the front, a visual impression of continuity of lines in both areas is created, as in the case of Example 3.

Example 5 (Fig. 7). Frontal color mismatch (creating the impression of two different colors) - reverse mismatch (the appearance of two opposite colors).

The first area has a color background (A) and embossed color lines (B). The second region has a background of color (C), which can be similar to or equal to color (B), and embossed lines of color (Ό), which can be similar to or equal to color (A). The first region visually has a color (E), which when viewed in the normal direction is closer to the background color (A) than to the color (B) of the embossed lines, while the second region visually has a color (E), which when viewed in the direction normals are closer to the color (C) of the background than to the color (Ό) of the embossed lines. This is shown in FIG. 7a. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate, or it can be the color of the substrate itself. When viewed at an angle, these two areas change their color to the opposite in accordance with the color of their embossed lines. When viewed at an angle, the first region changes its color, which when viewed in the normal direction was closer to the background color (A) than to the color (B) of the embossed lines, by color (B). The second region, when viewed at an angle, changes its color, which when viewed in the normal direction was closer to the background color (C) (which may be similar or equal to color (B)), to color (Ό) (which may be similar or equal to color (BUT)). This is shown in FIG. 7.

In a variant of this example, the width of the embossed lines can be 50-250 microns with a spacing between the lines so as to obtain a relief fill at the level of 30-70%, preferably 35-65%, and in the best case, 40-60%. To control this effect, the interval between the lines in each region can be made larger than the width of the relief line, i.e., the ratio of the line width to the interval can be less than 1. For example, let region 1 and region 2 both have the width of the relief lines and the interval between the lines equal 140 microns. When viewed in the direction of the normal, the combination of blue relief and yellow background in region 1 will appear blue-green with a greater share of blue than the combination of yellow relief and blue background of region 2. When viewed from an indirect angle, these regions change color, while region 1 becomes blue , and area 2 turns yellow. The effect can be enhanced if the line spacing is made larger than the line width. For example, in both regions 1 and 2, the width of the lines and the interval between the lines can be changed and made equal to 115 and 165 μm, respectively. This will lead to the fact that each area visually in color will become even closer to the color of its background than before. When viewed in the direction of the normal, region 1 will appear more yellow, and region 2 will appear bluer than before.

When viewed in the perpendicular direction, region 1 may then turn yellow-green, and region 2 may turn blue-green. When the document is tilted, the color of the relief print in each area will begin to play an increasing role in the overall visual perception of each area, and, at a certain tilt angle θ, the visible colors of the two areas under consideration will change to a color that, when perpendicular to viewing, corresponds to the color of the opposite area, t. e. Region 1 will appear blue-green and Region 2 will appear yellow-green. However, if you continue to tilt the document, then

- 5 010332 with a second value of the angle of inclination θ ', each area will acquire a color corresponding to the color of the relief lines. At this point, area 1 will visually turn blue, and area 2 will turn yellow. This is shown in FIG. 7a, 7b, 7c. At some point, when the device is tilted, both areas can visually become the same color.

In another example, these areas when viewed in the normal direction, instead of two even color fields, can be in the form of stripes. In this case, the color of the striped field as a whole in region 1 and region 2 will be visually perceived closer to the color of its own background than to the color of the relief. For the effect of the strips, it is desirable that the width of the relief lines is 150-450 microns. For example, region 1 and region 2 could have a line system with a relief line width of 260 μm and an interval between lines of 340 μm. Region 1 contains a blue relief and a yellow background, and region 2 contains a yellow relief on a blue background. The system of lines is such that when viewed in the direction of the normal, both areas will be visually perceived as stripes, but the color of the area as a whole will appear closer to the background color, i.e. area 1 will be perceived as yellow-green and striped, and area 2 will be perceived as blue-green and striped. When viewed from an indirect angle, each area changes its color to the color of its own embossed pattern: area 1 will look like an even blue field, and area 2 will look like an even yellow field.

Example 6 (Fig. 8). Frontal color mismatch (creating the impression of two different colors) - the same mismatch (the appearance of the same 2 colors).

The first area has a color background (A) and embossed color lines (B). The second region has a background of color (C), which can be similar to or equal to color (B), and embossed lines of color (Ό), which can be similar to or equal to color (A). When viewed in the direction of the normal, the first region visually looks in color, substantially closer to the color (B) of the embossed lines than in the color (A) of the background, while the second region when viewed in the direction of the normal, visually looks in color, essentially closer to the color (Ό) of the embossed lines than to the background color (C). This is shown in FIG. 8a. The background color of region 1 and / or region 2 can be obtained by applying a print or coating to the substrate, or it can be the color of the substrate itself. When viewed at an angle, the first region acquires color (B), and the second region acquires color (Ό), i.e. when the device is viewed at an angle, there is only a slight color change. This is illustrated in FIG. 8b.

The width of the embossed lines can be 50-250 microns with such an interval between the lines so as to obtain a relief fill at the level of 30-70%, preferably 35-65%, and in the best case, 40-60%. To obtain this effect, it is possible to make the width of the relief lines in each region larger than the interval between the lines, that is, the ratio of the line width to the interval can be specified greater than 1. For example, region 1 and region 2 can both have the width of the relief lines and the interval between lines equal to 140 microns. The combination of the blue relief and the yellow background in region 1, when viewed in the normal direction, will appear to be essentially the same (green) as the combination of the yellow relief and the blue background of region 2. When viewed at an angle, these regions change color, moreover region 1 acquires blue, and region 2 acquires yellow (relief printing colors). If the width of the lines is done more than the interval between the lines, then the color change can be made more invisible. For example, in both regions 1 and 2, the line width can be brought to 165 μm, and the spacing between the lines to 115 μm. This will lead to the fact that when viewed in the normal direction, region 1 will appear bluer than before (i.e., blue-green), and region 2 will appear more yellow (i.e. yellow-green). When looking in the direction of the normal, region 1 will look blue of region 2. However, when viewed at an indirect angle, region 1 (the bluer region) will change color to blue, and region 2 (the more yellow region) will change color to yellow. Therefore, the color change will occur less noticeably.

In another example, these areas when viewed in the normal direction, instead of two even color fields, can be in the form of stripes. In this case, the color of the striped field as a whole in region 1 and region 2 will be visually perceived closer to the color of its own relief than to the background color. For the effect of the strips, it is desirable that the width of the relief lines is 150-450 microns. For example, region 1 and region 2 could have a line system with a relief line width of 300 μm and an interval between lines of 200 μm. Region 1 contains a blue relief on a yellow background, and region 2 contains a yellow relief on a blue background. The system of lines is such that when viewed in the normal direction, both areas will be visually perceived as stripes, but the color of the region as a whole will appear closer to the color of the relief, i.e., region 1 will be perceived as blue-green and striped, and region 2 - yellow green and striped. When viewed from an indirect angle, each area changes its color to the color of its own embossed pattern: area 1 will look like an even blue field, and region 2 will look like an even yellow field.

Example 7 (Fig. 9). Frontal color matching - mismatch (two different colors).

In the first region, the embossed lines of color (B) are printed against a background of a different color (A) in such a way that when viewed in the direction of the normal, this region looks essentially the same as the second region, which contains only the background. The specified background may not be the area where gravure printing is used, or it may be the gravure printing area with a constant tone or transverse hatching or a similar, optically invariant method. The background of the second area is created, at least

- 6 010332 at least, in color (C) with or without additional color (Ό). The background color of region 1 and one of the background colors of region 2 can be the color of the base itself. When viewed at an angle, the first region acquires color (B) - the color of the relief lines. The color of the second area does not change.

As an example, the first region may have embossed lines with a width of 80 μm and an interval between lines of 80 μm. The combination of blue relief and yellow background, when viewed in the direction of the normal, will visually give a green color. Region 2 can be printed in one green color so that it essentially matches the visible color of region 1. When viewed from an angle, region 1 will turn blue, and region 2 will remain green. This is shown in FIG. 9a and 9b.

As a second example, region 1 may have embossed lines with a width of 250 μm and an interval between lines of 250 μm. Such an area will look like blue and yellow stripes. Region 2 can be printed in alternating yellow and blue stripes, each 250 μm wide, so that when viewed in the normal direction, you get essentially a color match with region 1. When viewed at an angle, region 1 will turn blue and region 2 will remain in the form of yellow and blue stripes. This is shown in FIG. 9c and 96.

The influence of the line structure on the angle at which the color changes.

If each area includes embossed lines with a fixed line width and elevation, then with an increase in the interval between embossed lines, the viewing angle necessary to see the color change approaches the surface of the base. As the interval between the lines decreases, the viewing angle necessary to see the color change approaches normal. As a result, color changes may become more noticeable. This is illustrated in FIG. 10a and 10b.

For example, in the area with blue embossed lines printed on a yellow background with a width of 160 μm and an interval between lines of 40 μm, a color change will occur at an angle θ 'from the normal. However, in the area with blue embossed lines printed on a yellow background with a width of 160 μm and an interval between lines of 200 μm, a color change will occur at an angle θ, which is closer to the surface of the substrate.

The influence of the height of the relief on the color change and the angle at which the color change occurs.

The height of the embossed lines can affect the color that each area acquires when viewed, both in the normal direction and at an angle. In particular, this happens when the color of the embossed lines is much lighter than the background color, for example, in the case of yellow intaglio printing on a deep blue background. As the paint film thickness increases, more ink is placed over the background, and this means that a smaller fraction of the background color is visible through the relief paint. When viewed at an angle, the color change will occur closer to the actual color of the relief paint, as is the case when a print is made against a white background. Conversely, when the thickness of the paint film decreases, a smaller amount of paint is placed over the background, and this means that a large proportion of the background color is visible through the relief paint. When viewed at an angle, when changing colors, a combination of the relief and background colors will appear.

The height of the relief lines, which consists of the height of the paint and the height of the protruding relief, in each area can also affect the viewing angle that is required to see the color change. A low height may mean that an angle θ ′ closer to the surface of the substrate will be required to observe color changes. An increased relief height may mean that an angle θ closer to the normal is required to observe color changes. An explanation of the relationship is shown in FIG. 11a and 11b.

The effect of opacity for gravure printing on color and angle changes.

By increasing the opacity of the ink for intaglio printing in one of the areas or in both areas, the color change of each area when viewing the image at an angle can be made more colorful and rich, i.e. the color will approach the actual color of the intaglio printing in white background. If one of the areas or both areas uses transparent ink for intaglio printing, then through it the color of the background on which this ink is applied will be visible, and therefore the color that appears when viewing each area at an angle will be a combination of the color of the relief chamfer and background color, and will be less close to the color of the relief paint. This effect is manifested to a greater extent if a light chamfer for intaglio printing, for example yellow, is selected, and if it is applied to a dark background, for example blue.

If, when viewed at an angle, each defined area forms a different color with respect to a different area, then the intaglio ink used in each of the areas should have enough hiding power to get a greater contrast between the two colors. For example, let region 1 and region 2 contain relief lines with a width of 80 μm, next with an interval of 100 μm, while region 1 has red relief lines against a blue background, and region 2 has blue relief lines against a red background. If both red and blue inks for intaglio printing have a low hiding power, then when viewed at an indirect angle, region 1 will look dark red and region 2 will look dark blue with a slight contrast in color or tone. If both red and blue inks have a high hiding power, then when viewed at an indirect angle, these two colors will look bright blue and bright red - much closer to the color of the ink for gravure printing,

- 7 010332 when applied to a white background - and also between the indicated colors a strong contrast will be observed.

In another embodiment, if the region of opaque red embossed lines on a blue background is compared with the second region containing transparent blue embossed lines on a red background, then when viewed at an angle, the colors that appear can also be very contrasting, but look like a pair of red and dark blue. black flowers. As a last example, if in the first region on a red background we use transparent blue ink for intaglio printing, and in the second region we use opaque blue ink for intaglio printing, then when viewing the image in the normal direction, you can get an approximate color match, but when viewing under In the corner, the first area may look dark-blue-black, while the second area may look much brighter, blue.

In addition, with an increase in the spreading rate of inks for gravure printing, the angle at which the color changes can shift closer to the normal, and the color change will occur more noticeably. If transparent printing inks are used in each area, the angle needed to observe color changes can move closer to the surface of the substrate, and the color change will be less pronounced.

The effect of transparency on gravure inks on color matching when viewing images in the normal direction.

With increasing opacity of the embossed lines printed on a colored background, the color of these lines, when viewed in the normal direction, will approach the color of the same ink for gravure printing on a white background. This will affect the color and appearance of each region as a whole when viewed in the direction of the normal, and in particular, this is relevant in relation to the coincidence of colors in a pair of regions, as described in example 3.

For example, let region 1 and region 2 both have the width of the relief lines and the spacing between the lines of 120 μm, with region 1 containing a blue relief with a red background and region 2 with a red relief with a blue background. When viewed in the normal direction, these areas may look completely different, depending on the opacity of the ink for gravure printing. If both paints have a low hiding power, then, when viewed in the normal direction, these two areas may look approximately the same in color. If you use bevels with a higher hiding power, then the color of intaglio printing will seem closer to the color of intaglio printing on a white background. This will change the appearance of these areas when they are viewed in the normal direction so that, as a result, there may no longer be a color match.

The effect of the background color on the color at which the color changes.

Depending on the opacity of the letterpress inks applied to both areas or one of the areas, the background color of both or one of the areas will contribute to the color change that occurs when both areas or one of the areas are viewed at an angle. If you use a dark color, such as blue, as the background and print embossed lines on top of the background with a light color, for example yellow, then the color that appears when viewing this area at an angle will be darker than the actual color that would be when gravure printing white background. Similarly, if a light color is used as the background, for example yellow, and the relief lines above the background are printed in dark color, for example blue, then the color that appears when viewing this area at an angle will be similar to the actual color, which would be the case for intaglio printing on white background. In both of the above examples, with an increase in the opacity of the facet for intaglio printing, the color that appears when viewing this area at an angle approaches the color of the facet for intaglio printing when applied to a white background.

The location of these two areas.

The two installed areas can be adjacent to each other, as in FIG. 12a; can be separated from each other, for example placed in different corners of the document, as in FIG. 12b; separated from each other by additional printing areas with or without application in the general composition of background printing and / or intaglio printing, as in FIG. 12s; can slightly overlap each other, as in FIG. 126; enter each other with colored stripes, as in FIG. 12e; or one area may be located within another area, as in FIG. 12E In addition to these examples, more than two areas may be used, for example, each of the areas may be divided into several sections (see FIG. 12 e, which can be compared with a chessboard), and / or additional areas may be added to the first two areas areas that take a special look (see Fig. 1211). This figure consists of four different regions: region 1, region 2, region 3 and region 4. Regions 1 and 2, when viewed in the normal direction, appear to match in color (color E), but when viewed at an angle, they become different colors (color B and Ό) —this effect is similar to that described in Example 3. Regions 3 and 4, when viewed in the normal direction, appear mismatched, and when viewed at an angle, they retain a similar color mismatch, similar to the effect described in the example

6. Region 2 and region 4 when viewed in the direction of the normal show a different color mismatch, and then when viewed at an angle, they appear to be of the same color. Region 1 and region 3 lead

- 8 010332 yourself the same way. Naturally, any combination of areas can be used in this way.

The shape of the lines.

Examples of gravure printing areas include rows of repeating straight lines. It is not necessary that these lines be straight, on the contrary, they can be of any shape / pattern, for example, it can be a concentric pattern, a wavy, curved, circular, triangular, zigzag, etc.

In FIG. 13 shows some suitable line structures composed of parallel lines, triangular lines, lines whose width varies along their length, wavy lines and concentric circles. However, it is not necessary that the relief lines are parallel - they can be converging and diverging. Some such non-parallel structures are shown in FIG. 13b. They include diverging lines, lines whose central point changes its position along the length, non-parallel wavy lines and concentric ellipses.

Gravure printing form.

In the gravure printing examples, the regions in question are made of rows of repeating lines. However, it is not necessary that these lines be continuous - these may be lines with gaps. Between breaks, lines can consist of strokes, dots, repeating shapes, and non-repeating shapes that are lined up as lines. Shapes can be circular dots, square dots, triangular dots, star-shaped dots, etc.

The position of the intaglio area relative to the background color.

The intaglio relief lines of any of the regions may extend beyond the background color of the corresponding region, as shown in FIG. 14a. Conversely, the background color of any of the regions may extend beyond the embossed relief lines of the corresponding region, as shown in FIG. 14b.

Variation in the structure of lines.

When viewed in the normal direction, the effect of shading can be obtained if the structure of the relief lines of each region in the transverse direction is made unstable, for example, increasing or decreasing the intervals between the lines or making them zigzag. But, this may not give a similar shading effect when viewing each of the areas at an angle. Simple shading is illustrated in FIG. 15a and 15b. This effect can also be used in more complex drawings, for example portraits, as shown in FIG. 16a and 16b. Darker images are obtained by increasing the percentage of filling with dark colored relief lines, drawn on a light background, or by reducing the percentage of filling with light colored relief lines, drawn on a dark background. In another embodiment, when viewed in the normal direction, shading effects can be created by changing the background color saturation in each area.

Select a color to enhance the color change effect.

Any color can be used for the background or gravure printing in each of the areas or both areas, but for the maximum color effect that occurs when viewing the image at an angle, you can use strongly contrasting color pairs, for example, blue-yellow, blue-red , red-yellow, violet-orange, violet-yellow, red-green, black-white, etc.

For example, an area with a pair of blue-yellow colors may have a background color of ΡΑΝΤΟΝΕ 2955M (blue), and a relief print of a visual color ΡΑΝΤΟΝΕ UEBEOHOU M (yellow). In contrast, an area with a pair of red-yellow colors may have a background color of ΡΑΝΤΟΝΕ 130M (yellow), and a relief print of a visual color ΡΑΝΤΟΝΕ 1788M (red). As another example, an area with a pair of violet-orange colors can be presented, which can have a background color of ΡΑΝΤΟΝΕ 153M (orange), and the structure of the relief lines of the visual color is ΡΑΝΤΟΝΕ 2957 (purple).

Claims (40)

CLAIM 1. An anti-fake device comprising a flat base on which the first and second areas are provided, each area containing a structure of printed, spaced relief lines, and a background filling the gaps between the lines, wherein the visual color appearance of the lines differs from the visual the color view of the background, and the visual color views of the corresponding backgrounds and / or the corresponding line structures of these two regions are different from each other, while the visual color views of the backgrounds and line structures, as well as The indicated line structures are chosen in such a way that: a) when viewing the device with the naked eye of the observer in a direction perpendicular to the plane of the base, the resulting visual color views of the two areas are obtained from a combination of visual color views of the corresponding background and the structure of the relief lines of each area and look essentially the same, and b) when viewing the device with the naked eye of an observer at a first indirect angle to the plane of the base, the resulting visual color views of the two areas differ from - 9 010332 friend due to the partial overlap of the backgrounds with the corresponding structures of embossed lines, while the difference between the resulting visual color types of the two areas is a sign of the authenticity of the device. 2. A fake protection device comprising a flat base on which the first and second areas are provided, each area containing a structure of printed, spaced relief lines, and a background filling the gaps between the lines, while the visual color appearance of the lines differs from the visual the color view of the background, and the visual color views of the corresponding backgrounds and / or the corresponding line structures of these two regions are different from each other, while the visual color views of the backgrounds and line structures, as well as The indicated line structures are chosen in such a way that: a) when viewing the device with the naked eye of the observer in a direction perpendicular to the plane of the base, the first region represents the first resulting visual color view, and the second region represents the second resulting visual color view, different from the first, and each resulting visual color view is obtained from a combination of visual color views corresponding background and structure of relief lines, and b) when viewing the device with the naked eye of an observer at a first indirect angle to the plane of the base, the first region represents essentially the second resulting visual color view, and the second region represents essentially the first resulting visual color view due to the partial overlap of the backgrounds with the corresponding structures of the relief lines, the difference in the resulting visual color types of the two areas is a sign of the authenticity of the device. 3. The device according to claim 1 or 2, characterized in that the visual color view of each background and each structure of embossed lines is determined by its color, or saturation, or both of these signs. 4. The device according to claim 3, characterized in that the difference in the resulting visual color view of the area is determined by a change in color, or saturation, or a change in both of these signs. 5. The device according to any one of the preceding paragraphs, characterized in that the resulting visual color view of the area when viewed in a direction perpendicular to the plane of the base, contains a pattern, for example parallel or non-parallel lines. 6. The device according to any one of claims 1 to 4, characterized in that the resulting visual color view of the area when viewed in the perpendicular direction contains essentially a solid tone. 7. The device according to any one of the preceding paragraphs, characterized in that the resulting visually perceptible color view of the area when viewed from the first indirect angle to the plane of the base contains a drawing. 8. The device according to any one of claims 1 to 6, characterized in that the resulting visually perceptible color view of the area when viewed at a first indirect angle to the plane of the base contains a substantially continuous tone. 9. The device according to claim 6 or 8, characterized in that the structure lines of the relief lines are difficult to distinguish with respect to the background with the naked eye. 10. The device according to claim 5 or 7, characterized in that the figure contains many parallel stripes. 11. The device according to claim 10, characterized in that both areas represent the strip when viewed both in the perpendicular direction and at an indirect angle, while the strip is offset from each other in the transverse direction. 12. The device according to any one of the preceding paragraphs, characterized in that the visual color view of the background of the first region is essentially the same as the visual color view of the structure of the relief lines of the second region, and the visual color view of the background of the second region is essentially the same as the visual color view of the structure of the relief lines of the first region. 13. The device according to claim 1 or any of claims 3-11, in the case of their subordination to claim 1, characterized in that the visual color view of each background and each structure of the relief lines is determined by mutually different colors: its color, the color of the backgrounds and the color of the structures embossed lines, with the colors chosen in such a way that the resulting color of the regions when viewed in the perpendicular direction differs from the individual colors of the backgrounds and line structures. 14. The device according to claim 1, characterized in that the visual color view of the background and the visual color view of the structure of the relief lines of one region are different from the visual color view of the background and the visual color view of the structure of the relief lines of another region, wherein the structure of the relief lines of each region is that when viewed in the perpendicular direction, the regions represent the resulting visual color views that are closer in color to the visual color views of the structures of the embossed lines than to the visual color view at the corresponding background, while at a first indirect viewing angle areas represent the resulting - 10 010332 visual color views are essentially the same as the structure of the relief lines. 15. The device according to claim 2, characterized in that the visual color view of the background and the visual color view of the structure of the relief lines of one region differ from the visual color view of the background and the visual color view of the structure of the relief lines of another region, wherein the structure of the relief lines of each region is that when viewed in the perpendicular direction, the regions represent the resulting visual color views that are closer in color to the background color than to the color of the corresponding structure of the embossed lines, while second sense indirect viewing angle regions are species resulting visual color substantially the same as the structure of the embossed lines. 16. The device according to p. 15, characterized in that the first and second indirect angles are different. 17. The device according to any one of the preceding paragraphs, characterized in that the first and second areas are separated from each other by using additional printing areas, with or without application of background printing and / or gravure printing in the overall composition. 18. The device according to any one of the preceding paragraphs, characterized in that the visual color view of one of the backgrounds and / or structure of the embossed lines is black. 19. The device according to any one of the preceding paragraphs, characterized in that the visual color view of one of the backgrounds and / or structure of the embossed lines is white. 20. The device according to any one of the preceding paragraphs, characterized in that at least one of the resulting visual color views, which represent these two areas when viewed from the first indirect angle, is essentially the same as the visual color view of one of the relief structures lines. 21. The device according to any one of the preceding paragraphs, characterized in that the visual color view of at least one of the backgrounds is defined by one or more colored materials deposited on a base and having a color different from the natural color of the base. 22. The device according to p. 21, characterized in that each colored material passes through the corresponding area, including the area under the structure of the relief lines. 23. The device according to any one of claims 1 to 22, characterized in that the visual color view of at least one background contains the natural color of the base. 24. The device according to any one of the preceding paragraphs, characterized in that the corresponding background colors and relief lines of one area are selected from the following color pairs: blue-yellow, blue-red, red-yellow, violet-orange, violet-yellow, red-green, black- white. 25. The device according to any one of the preceding paragraphs, characterized in that the first and second areas are adjacent to each other. 26. The device according to any one of the preceding paragraphs, characterized in that the structures of the relief lines of the two regions differ from each other either by the width of the lines, or by the interval between the lines, or both. 27. The device according to p. 26 if it is subordinate to p. 25, characterized in that the widths of lines and intervals determined by the structures of the relief lines of the two regions complement each other. 28. The device according to any one of the preceding paragraphs, characterized in that the lines of at least one structure of embossed lines have a width greater than the interval between adjacent lines. 29. The device according to any one of the preceding paragraphs, characterized in that the lines of at least one structure of embossed lines have a width less than the interval between adjacent lines. 30. The device according to any one of the preceding paragraphs, characterized in that the lines of at least one structure of the relief lines are spaced from each other, essentially at equal distances. 31. The device according to any one of the preceding paragraphs, characterized in that the line width and line spacing in the structures of the relief lines are in the range of 30-600 μm, preferably 50-500 μm, more preferably 80-400 μm, most preferably 80-300 μm . 32. The device according to any one of the preceding paragraphs, characterized in that the filling with embossed printing is 30-70%, preferably 35-65%, most preferably 40-60%. 33. The device according to any one of the preceding paragraphs, characterized in that the lines of the structures of the relief lines are continuous or intermittent. 34. The device according to any one of the preceding paragraphs, characterized in that the lines of the structures of the relief lines are either straight, or wavy, or curves. 35. The device according to any one of the preceding paragraphs, characterized in that the lines of two structures of embossed lines are essentially parallel. 36. The device according to any one of the preceding paragraphs, characterized in that the structures of the embossed lines are made in one of the following ways: intaglio printing, screen printing with a tactile effect, thermography, inkjet printing with a tactile effect, offset printing followed by blind embossing with registration, method blind embossing followed by - 11 010332 printing with a low pressure for applying paint only on convex areas. 37. A fake protection device comprising a flat base on which the first and second areas are provided, one area containing a structure of printed, spaced relief lines, and a background filling the gaps between the lines, while the visual color appearance of the lines differs from the visual the color view of the background, and the other region has a visual color view that is essentially unchanged at all viewing angles, while the visual color view of the background and the structure of the relief lines of one area, as well as the shape of the specified line structures are selected so that: a) when viewing the device with the naked eye of the observer in the direction perpendicular to the plane of the base, the resulting visual color views of the two areas are essentially the same, and b) when viewing the device with the naked eye of the observer at a first indirect angle to the plane of the base, the resulting visual color views of the two areas are different from each other, and the difference is a sign of the authenticity of the device. 38. The device according to clause 37, wherein one area is defined in the same way as the area of the device according to any one of claims 1 to 36. 39. A valuable document bearing a protective device described in any of the preceding paragraphs. 40. Valuable document according to clause 39, characterized in that it contains a banknote.