CN110920283A

CN110920283A - Printing stock printed with patterns with triple visual effects and preparation method thereof

Info

Publication number: CN110920283A
Application number: CN201911177681.8A
Authority: CN
Inventors: 俞纬; 孟庆飞; 姚卫东; 邵光胜; 马永胜
Original assignee: China Banknote Ink Co ltd; China Banknote Printing and Minting Corp
Current assignee: China Banknote Ink Co ltd; China Banknote Printing and Minting Group Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-03-27
Anticipated expiration: 2039-11-27
Also published as: CN110920283B

Abstract

The invention provides a printing stock printed with patterns with triple visual effects, wherein the patterns with triple visual effects are formed by overprinting and engraving gravure printing bodies on fluorescent printing bodies, and lines of the fluorescent printing bodies are at least divided into two parts with color difference. Under the irradiation of an ultraviolet light source, colorful fluorescent shading patterns can be displayed, under the observation of different angles, the combination of fluorescence and the patterns of the engraving intaglio printing part has a special visual effect, the visual property, the artistic property, the interestingness and the anti-counterfeiting property of the intaglio engraving picture are increased, the defect of the single color of the traditional intaglio engraving picture is overcome, and the application scene of the technology is further expanded.

Description

Printing stock printed with patterns with triple visual effects and preparation method thereof

Technical Field

The invention relates to the technical field of printing ink, and relates to a printing stock printed with patterns with triple visual effects and a preparation method thereof.

Background

The engraving gravure technology is an anti-counterfeiting means widely applied in the bank note printing industry, lines and dots in different forms are used for expressing the light and shade layering of patterns, the plate line structure is unique, and a printed product has good hand feeling. Because the original edition is carved by hand, the difficulty of the plate making process is very high, and the artistic expression and the anti-counterfeiting performance are very strong. Due to the advantages, the intaglio engraving process in the prior industry is mainly applied to the fields of paper money, stamps and the like, and the intaglio engraving artworks of non-paper money types are few. The intaglio engraving picture is also an artistic door, can have larger size and creation exertion space as an intaglio work used for non-currency bills, and is an artwork with certain collection value.

The colorless fluorescent ink can emit visible light under the irradiation of an ultraviolet light source to generate various colors, and the colors disappear after the irradiation of the ultraviolet light is stopped. The colorless fluorescent ink is widely applied to modern anti-counterfeiting printing due to the characteristics of good concealment, low cost, convenient inspection and the like. Moreover, fluorescent materials are also commonly used in artistic creation due to their bright colors that are exhibited under the irradiation of uv excitation light sources.

Chinese patent CN 103895374 provides an anti-counterfeiting pattern with an optically variable structure, which is composed of a flat plate printing line and a gravure pixel embossing line, but the pattern is mainly used for anti-counterfeiting, so the shape is relatively fixed, and the color richness is also deficient.

Chinese patent CN 1262430 provides a data carrier with optically variable structures that produce a tilting effect when viewed alternately vertically and obliquely, but with the print on the side of the relief structure, the process accuracy is high.

With the increasing living standard of the public, people have great demands on high-end products with color expression, visual effect with beautiful appearance and aesthetic feeling. Although the engraving gravure technology has better plate line structure and visual layering, the richness of the color, the visual effect of the appearance and the anti-counterfeiting effect of the printing are limited due to technical factors.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a substrate printed with a pattern having a triple visual effect and a method for manufacturing the same.

In order to achieve the above and other related objects, a first aspect of the present invention provides a printing material printed with a pattern having triple visual effects, wherein the pattern having triple visual effects is formed by overprinting an engraved intaglio printing body on a fluorescent printing body, and the overprinting precision error of the fluorescent printing body and the engraved intaglio printing body is not more than 10 um.

The invention provides a preparation method of the printing stock printed with the pattern with the triple visual effect, which is characterized by comprising the following steps:

(1) printing fluorescent ink on a printing stock to form a fluorescent printing body, wherein the lines of the fluorescent printing body are at least divided into two parts with color difference;

(2) and a layer of engraving gravure printing body formed by engraving gravure printing ink is overprinted on the fluorescent printing body, and patterns with triple visual effects are formed.

A third aspect of the invention provides the use of a substrate printed with a pattern having a triple visual effect as hereinbefore described for printing.

As described above, the printing material printed with the pattern having the triple visual effect and the preparation method thereof have the following advantages:

the colorless fluorescent offset printing is added in the traditional intaglio engraving printing process, lines of intaglio engraving patterns are precisely overprinted on the lines of the fluorescent patterns, the finally presented pattern effect of the intaglio engraving patterns is not different from that of a common intaglio engraving printed product under visible light, but bright and colorful fluorescent shading patterns can be displayed under the irradiation of an ultraviolet light source, under the observation of different angles, the combination of fluorescence and the patterns of the intaglio engraving parts has a special visual effect, the triple visual effect is realized, the visual property, the artistry, the interest and the anti-counterfeiting property of the intaglio engraving patterns are added, the defect of single color of the traditional intaglio engraving patterns is overcome, and the application scene of the technology is further expanded.

Drawings

FIG. 1 shows a fluorescence print shading pattern according to an embodiment of the present invention.

Fig. 2 shows a pattern with triple visual effects according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It should be understood that the processing equipment or devices not specifically mentioned in the following examples are conventional in the art; all pressure values and ranges refer to absolute pressures.

Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.

The invention relates to a printing stock printed with patterns with triple visual effects, wherein the patterns with triple visual effects are formed by overprinting and engraving gravure printing bodies on fluorescent printing bodies, and lines of the fluorescent printing bodies are at least divided into two parts with color differences.

The pattern presented finally can have different colors when the observation angle is different, and special visual effect is generated. The lines of the fluorescent print are divided into at least two parts with color differences. But is not limited to only two colors. Further, it may be equally divided into two parts.

Further, the fluorescent printing body is printed by colorless offset fluorescent ink.

The fluorescent printing body can emit ultraviolet light with the excitation wavelength of 200-400 nm.

In one embodiment, the line width of the fluorescent print can be 200-300 um. I.e. the line width of the two parts equally divided is 100-150 um.

The fluorescent printing body uses fluorescent red, fluorescent green and fluorescent blue three-color offset printing base ink, and realizes the color printing of the fluorescent printing body by utilizing the additive color effect of light. Specifically, a red, green and blue printing plate needs to be manufactured, a multi-color offset press screen printing mode is used for printing on a printing substrate, and the color printing of the fluorescent shading pattern is realized through the principle of an additive color method.

The overprinting precision error of the fluorescent printing body and the engraving gravure printing body is not more than 10 um.

The precision refers to the accuracy of the positions of the patterns of all colors in the printing process. The printing stock is provided with the positioning marks, and each printing machine can automatically adjust the position according to the positioning marks so as to ensure that the overprinting precision error does not exceed 10 um.

The line color of the engraved gravure print is a single color distinct from the color of the fluorescent print. Preferably a dark color to provide a visually large contrast with the fluorescent colors. The dark color refers to a color having an L value of less than 15 in the LAB color mode. Such as black, dark purple, dark brown, etc.

The line width of the engraved gravure print is less than the line width of the fluorescent print.

The lines of the engraved gravure printing body and the two sides of the lines of the fluorescent printing body are not overlapped.

Further, in order to obtain a special visual effect, the central line of the engraved gravure printing body coincides with the central line of the fluorescent printing body. The lines of the engraved gravure printing body are accurately overprinted in the middle of the colorless offset printing fluorescent lines. Namely, the offset fluorescent patterns on two sides are divided into two narrow lines on two sides by an engraving gravure line.

In order to ensure that the final overall presented visual effect is excellent, the appropriate width ratio of gravure lines and offset lines and the appropriate height of gravure lines need to be selected, and the line width of the engraved gravure printing body is 60-80% of the line width of the offset fluorescent pattern. Which may be 120-240 um. Or 60-70% and 70-80%. The height of the lines of the engraving gravure printing body is 60-100 um. If the offset line is too wide and gravure too narrow, viewing the gravure line on the side does not hide the lines on opposite sides, so there is a suitable width ratio, and a suitable height.

The substrate may be paper, plastic substrate, etc.

The printing stock of pattern with triple visual effect only shows the pattern of sculpture gravure when visible light, when ultraviolet excitation light source shines, then can show fluorescence pattern, and both patterns combine together and form new visual effect: all patterns, lines and colors can be observed during vertical observation, when the inclination angle is observed at one side, the fluorescent offset printing lines at the other side of the engraved gravure lines can be shielded by the raised gravure lines, and only the fluorescent lines at the observation side can be seen.

In one embodiment, as shown in FIG. 1, a closed line letter "O" is printed in a fluorescent offset ink, and the line width is 300 um. The line is divided into two lines with the dotted line as the boundary, the area 1 is red, the area 2 is blue, and the widths of the red area and the blue area are 150um respectively.

As shown in fig. 2, sculpture gravure printing body lines 3 need accurate overprinting in the middle of the fluorescence shading lines, sculpture gravure printing body lines width 240um, lines height 80um, overprinting precision error is no more than 10um, and the colour is black. Thus, the fluorescent offset printed lines of the first layer are partially covered by the printed gravure lines of the second layer, after which the widths of zone 1 and zone 2 are each 30 um.

The special visual effect obtained by the pattern of the example is as follows: under visible light, the pattern only shows region 3. Under ultraviolet light, fluorescent offset lines appear. When the pattern is viewed in a plan view, all lines and colors constituting the pattern can be observed. When the left side is obliquely observed, the outer ring red area 1 on the left side of the pattern can be observed, the inner ring blue area 2 is shielded by the raised black gravure lines, the inner ring blue area 2 on the right side of the pattern can be observed, and the outer ring red area 1 is shielded by the raised gravure lines; similar special visual effects can be observed at right oblique angles.

The preparation method of the printing stock printed with the patterns with the triple visual effects comprises the following steps:

Further, the fluorescent printing body is printed by an offset printing machine. The engraved intaglio printing body is printed by an engraved intaglio printing press. The printing stock is provided with the positioning marks, and each printing machine can automatically adjust the position according to the positioning marks so as to ensure that the overprinting precision error does not exceed 10 um.

For example, the offset press may be Heidelberg SM74-4 and the engraved intaglio printing press may be a KBA super-wiring intaglio press.

The printing stock printed with the pattern with the triple visual effect can be used for printing.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The printing stock printed with the patterns with the triple visual effects is characterized in that the patterns with the triple visual effects are formed by overprinting and engraving gravure printing bodies on fluorescent printing bodies, and lines of the fluorescent printing bodies are at least divided into two parts with color differences.

2. The substrate printed with a triple vision effect pattern according to claim 1, wherein the fluorescent print is printed with a colorless offset fluorescent ink.

3. The substrate printed with triple visual effect patterns according to claim 1, wherein the fluorescent print is capable of emitting ultraviolet light with an excitation wavelength of 200-400 nm.

4. The substrate printed with a triple visual effect pattern according to claim 1, wherein the overprint precision error of the fluorescent print and the engraved gravure print is not more than 10 um.

5. The substrate printed with a triple vision effect pattern according to claim 1, wherein the line color of the engraved intaglio print is a single color distinct from the color of the fluorescent print.

6. The substrate printed with a triple vision effect pattern according to claim 1, wherein the engraved intaglio print has a line width smaller than the line width of the fluorescent print.

7. The substrate printed with triple vision effect patterns according to claim 1, wherein the engraved intaglio print has a line width of 60% to 80% of the offset fluorescent pattern lines.

8. The substrate printed with a triple vision effect pattern according to claim 1, wherein the engraved intaglio print has a line height of 60-100 um.

9. The method of making a substrate printed with a pattern having a threefold visual effect according to any one of claims 1 to 8, comprising the steps of:

10. Use of a substrate printed with a pattern having a triple visual effect according to any one of claims 1 to 8 for printing.