CN109703227B - Method for manufacturing anti-counterfeiting pattern integrating hidden lines, latent images and unlocking by embossing - Google Patents
Method for manufacturing anti-counterfeiting pattern integrating hidden lines, latent images and unlocking by embossing Download PDFInfo
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- CN109703227B CN109703227B CN201910052573.1A CN201910052573A CN109703227B CN 109703227 B CN109703227 B CN 109703227B CN 201910052573 A CN201910052573 A CN 201910052573A CN 109703227 B CN109703227 B CN 109703227B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000004049 embossing Methods 0.000 title claims abstract description 17
- 238000007639 printing Methods 0.000 claims abstract description 20
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 22
- 239000010949 copper Substances 0.000 claims description 22
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 6
- 238000010147 laser engraving Methods 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 101100063942 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) dot-1 gene Proteins 0.000 description 4
- 238000007646 gravure printing Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
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- Printing Methods (AREA)
Abstract
The invention relates to the technical field of anti-counterfeiting, in particular to a method for manufacturing an anti-counterfeiting pattern by combining dark lines, latent images and unlocking, which comprises the steps of manufacturing a grid composed of hemispherical lattice points and uniformly arranged, engraving the hidden patterns for unlocking, engraving the latent images, engraving the dark lines, electropolishing, plating chrome and embossing. Compared with the prior art, the invention combines the three anti-counterfeiting technologies of dark lines, latent images and unlocking into a whole, adopts a laser direct engraving machine for engraving, and then uses an embossing process for embossing on a printing stock to form the anti-counterfeiting pattern, wherein the engraving dots are three-dimensional hemispheres, the manufactured anti-counterfeiting pattern has stronger stereoscopic impression, the fineness of the engraving net wires can reach 200 lines/cm, the anti-counterfeiting effect is better, and printing ink is not used in the whole manufacturing process, so that the anti-counterfeiting pattern is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of anti-counterfeiting, in particular to a method for manufacturing an anti-counterfeiting pattern by combining dark lines, latent images and unlocking.
Background
The anti-counterfeiting requirements of various products in the market at present are more and more extensive, and particularly, the anti-counterfeiting technology of tobacco package products is more and more demanding. The anti-counterfeiting pattern mainly comprises three modes of dark lines, latent images and unlocking, and the prior art mostly adopts a gravure printing process to manufacture the anti-counterfeiting pattern, but the gravure printing anti-counterfeiting technology has the following problems: (1) Because the printing ink has diffusivity and has great influence on engraving precision, the product cannot be very fine, and the finest degree of the printed matter is generally 100 lines/cm at present; (2) The printed pattern is 2D plane, 3D stereoscopic impression is not generated, and anti-counterfeiting effect of making a latent image (namely, the 3D shape of the net point can hide characters or patterns in the ground pattern through reflection of light with different angles, and the hidden patterns can be seen only through a certain angle) is poor; (3) The gravure printing is used for manufacturing an unlocking anti-counterfeiting pattern (namely, screen dots or screen wires are used as basic units to form and represent various printing patterns) cannot be better hidden, because the unlocking mode is to slightly shift the positions of characters or patterns to be hidden, and the printing difficulty is the shift amount, if the shift amount is small, the printing ink is diffused after printing, so that the hidden patterns cannot be seen by an unlocking sheet after printing a product, or the hidden patterns cannot be seen clearly, and thus the anti-counterfeiting effect cannot be achieved; if the offset is large, hidden contents can be seen by naked eyes without using an unlocking plate, and the aim of unlocking and anti-counterfeiting cannot be achieved.
Disclosure of Invention
The invention aims to provide a method for manufacturing an anti-counterfeiting pattern by embossing dark lines, latent images and unlocking integrated with strong stereoscopic impression, high fineness and good anti-counterfeiting effect aiming at the defects in the prior art.
The method for manufacturing the anti-counterfeiting pattern integrating the dark lines, the latent images and the unlocking by embossing comprises the following steps:
firstly, utilizing image processing software to firstly manufacture grids which are uniformly arranged, wherein the shapes of all the net points in the grids are hemispherical;
step two, shifting the hemispherical lattice points corresponding to the patterns to be hidden in the grids by a certain distance, wherein the shifting amount is 0.02-0.04mm, and engraving the patterns on the copper roller by using a laser engraving machine after shifting, so as to obtain the hidden patterns displayed after being matched with the unlocking diaphragm;
selecting partial hemispherical net points in the grid by utilizing image processing software, designing angles to be cut, then cutting the surfaces of the hemispherical net points from different cutting angles respectively, enabling light to show different latent image patterns through different reflection angles after passing through the cut net points 4, and engraving on a copper roller by adopting a laser direct engraving machine;
selecting partial hemispherical net points in the grid by utilizing image processing software, shrinking the whole outline of the partial hemispherical net points to form hemispherical reduced net points, forming dark patterns which can be recognized by naked eyes by the hemispherical reduced net points, and engraving on a copper roller by adopting a laser engraving machine;
step five, carrying out electrolytic polishing on the pattern residues engraved on the copper roller to enable the surfaces of all the net points to be smooth and free of burrs;
step six, performing chromium plating on the copper roller after electrolytic polishing to achieve the performances of increasing hardness and resisting corrosion;
and step seven, assembling the processed copper roller on an embossing machine, embossing the printing stock, and obtaining the anti-counterfeiting pattern integrating the dark lines, the latent images and the unlocking.
In the technical scheme, in the second step, a laser direct engraving machine is adopted for engraving, the light spot size is 0.005mm, the engraving depth is 0.06mm, and the engraving resolution is 5080dpi.
In the above technical solution, in the second step, the offset is that the halftone dot is offset to the left or right, and the offset is 0.03mm.
In the above technical solution, in the third step, the cutting angle is ±45 degrees and/or ±135 degrees.
The invention has the technical effects that:
compared with the prior art, the invention has the following advantages:
(1) Compared with printing dots, the three-dimensional anti-counterfeiting pattern manufactured by the three-dimensional hemispherical dots has stronger stereoscopic impression, and particularly when the latent image pattern is manufactured, the 3D shape of the dots forms the three-dimensional latent image pattern through reflection of light with different angles, so that the anti-counterfeiting effect is better;
(2) The screen dots engraved by the laser direct engraving machine can be finer, the fineness of the engraving screen wires can reach 200 lines/cm, and the fineness of the printed matter can only reach 100 lines/cm;
(3) The invention adopts the laser direct engraving machine to engrave the copper plate, and then uses the embossing technique to emboss the copper plate on the printing stock, the transfer rate is up to more than 95%, the engraved pattern can be transferred to the needed printing stock well, and the whole manufacturing process does not use printing ink, thus being more environment-friendly;
(4) The anti-counterfeiting pattern manufactured by the invention combines the dark lines, the latent images and the unlocking anti-counterfeiting technologies into a whole, thereby realizing better anti-counterfeiting effect.
Drawings
The invention will be further described with reference to the accompanying drawings, in which embodiments do not constitute any limitation of the invention, and other drawings can be obtained by one of ordinary skill in the art without inventive effort from the following drawings.
Fig. 1 is a schematic diagram of a grid structure formed by hemispherical dots according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a structure of shifting dots in a grid according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a hidden pattern displayed after the mesh of the embodiment of the present invention is matched with an unlocking membrane.
FIG. 4 is a schematic diagram of a latent image pattern formed by cut dots in a grid according to an embodiment of the invention.
Fig. 5 is a schematic structural diagram of a dark pattern formed by the reduced dots 5 in the grid according to the embodiment of the present invention.
Reference numerals:
1-net point, 2-unlocking membrane, 3-hidden pattern;
4-cut dots, 40-latent image pattern;
5-reduce dots, 50-dark stripe pattern.
Detailed Description
The invention will be further described with reference to the following examples.
The method for manufacturing the anti-counterfeiting pattern integrating the dark lines, the latent images and the unlocking by embossing in the embodiment comprises the following steps of:
the method comprises the following steps:
firstly, a grid which is uniformly arranged is manufactured by utilizing image processing software, and the shapes of all the net points 1 in the grid are three-dimensional hemispheres (shown in figure 1).
Step two, shifting the hemispherical net point 1 corresponding to the pattern to be hidden in the grid by a certain distance, wherein the offset is 0.02-0.04mm (the net point 1 with the offset is shown in figure 2), and engraving the pattern on a copper roller by a laser direct engraving machine after shifting, so as to obtain a hidden pattern 3 (shown in figure 3) displayed after being matched with the unlocking diaphragm 2;
thirdly, selecting partial hemispherical net points 1 in the grid by utilizing image processing software, designing angles required to be cut, then cutting the surfaces of the hemispherical net points 1 from different cutting angles respectively to enable light to show different latent image patterns 40 (shown in fig. 4) through different reflection angles after passing through the cut net points 4, and then engraving on a copper roller by adopting a laser engraving machine;
step four, selecting partial hemispherical net points 1 in the grid by utilizing image processing software, shrinking the whole outline of the partial hemispherical net points to form hemispherical reduced net points 5, forming dark patterns 50 (shown in fig. 5) which can be recognized by naked eyes by the hemispherical reduced net points 5, and engraving on a copper roller by adopting a laser direct engraving machine;
step five, carrying out electrolytic polishing on the pattern residues engraved on the copper roller to enable the surfaces of all the net points 1 to be smooth and free of burrs;
step six, performing chromium plating on the copper roller after electrolytic polishing to achieve the performances of increasing hardness and resisting corrosion;
step seven, assembling the processed copper roller on an embossing machine, embossing a printing stock to obtain an anti-counterfeiting pattern integrating dark lines, latent images and unlocking; preferably, the wool roller and the steel roller are adopted to be matched with embossing, the transfer rate is up to more than 95%, and the engraved patterns can be well transferred onto a required printing stock.
In this example, as a preferred embodiment, in the second step, a laser direct engraving machine is used for engraving, the fineness of the engraved net wire reaches 200 lines/cm, the spot size is 0.005mm, the engraving depth is 0.06mm, and the engraving resolution is 5080dpi.
When the hidden pattern is manufactured in the second step, the offset refers to that the screen dot 1 is offset leftwards or rightwards, and the offset is 0.03mm.
In this example, as a preferred embodiment, as shown in fig. 5, in the third step, the cutting angle is the angle between the cutting line and the horizontal line, and the cutting angle includes four angles of ±45 degrees and ±135 degrees, so that different latent image patterns are displayed by different reflection angles of light, and actually, different combinations of cutting angles can be selected according to the designed latent image patterns.
Compared with the prior art, the invention has the following advantages:
(1) Compared with the printing dot 1, the three-dimensional hemispherical dot 1 has stronger third dimension, particularly when the latent image pattern is manufactured, the 3D shape of the dot 1 forms the three-dimensional latent image pattern through the reflection of light with different angles, and the anti-counterfeiting effect is better;
(2) The net point 1 engraved by the laser direct engraving machine can be finer, the fineness of the engraving net line can reach 200 lines/cm, and the fineness of the printed matter can only reach 100 lines/cm;
(3) The invention adopts the laser direct engraving machine to engrave the copper plate, and then uses the embossing technique to emboss the copper plate on the printing stock, the transfer rate is up to more than 95%, the engraved pattern can be transferred to the needed printing stock well, and the whole manufacturing process does not use printing ink, thus being more environment-friendly;
(4) The anti-counterfeiting pattern manufactured by the invention combines the dark lines, the latent images and the unlocking anti-counterfeiting technologies into a whole, thereby realizing better anti-counterfeiting effect.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (4)
1. The method for manufacturing the anti-counterfeiting pattern integrating the dark lines, the latent images and the unlocking is characterized by comprising the following steps of: the method comprises the following steps:
firstly, utilizing image processing software to firstly manufacture grids which are uniformly arranged, wherein the shapes of all the net points in the grids are hemispherical;
step two, shifting the hemispherical lattice points corresponding to the patterns to be hidden in the grids by a certain distance, wherein the shifting amount is 0.02-0.04mm, and engraving the patterns on the copper roller by using a laser engraving machine after shifting, so as to obtain the hidden patterns displayed after being matched with the unlocking diaphragm;
selecting partial hemispherical net points in the grid by utilizing image processing software, designing angles to be cut, then cutting the surfaces of the hemispherical net points from different cutting angles respectively, enabling light to show different latent image patterns through different reflection angles after passing through the cut net points 4, and engraving on a copper roller by adopting a laser direct engraving machine;
selecting partial hemispherical net points in the grid by utilizing image processing software, shrinking the whole outline of the partial hemispherical net points to form hemispherical reduced net points, forming dark patterns which can be recognized by naked eyes by the hemispherical reduced net points, and engraving on a copper roller by adopting a laser engraving machine;
step five, carrying out electrolytic polishing on the pattern residues engraved on the copper roller to enable the surfaces of all the net points to be smooth and free of burrs;
step six, performing chromium plating on the copper roller after electrolytic polishing to achieve the performances of increasing hardness and resisting corrosion;
and step seven, assembling the processed copper roller on an embossing machine, embossing the printing stock, and obtaining the anti-counterfeiting pattern integrating the dark lines, the latent images and the unlocking.
2. The method for manufacturing the anti-counterfeiting pattern with the combination of dark lines, latent images and unlocking according to claim 1, wherein the method is characterized by comprising the following steps of: in the second step, a laser direct engraving machine is adopted for engraving, the light spot size is 0.005mm, the engraving depth is 0.06mm, and the engraving resolution is 5080dpi.
3. The method for manufacturing the anti-counterfeiting pattern with the combination of dark lines, latent images and unlocking according to claim 1, wherein the method is characterized by comprising the following steps of: in the second step, the offset is that the screen dots are offset leftwards or rightwards, and the offset is 0.03mm.
4. The method for manufacturing the anti-counterfeiting pattern with the combination of dark lines, latent images and unlocking according to claim 1, wherein the method is characterized by comprising the following steps of: in the third step, the cutting angle is +/-45 degrees and/or +/-135 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910052573.1A CN109703227B (en) | 2019-01-21 | 2019-01-21 | Method for manufacturing anti-counterfeiting pattern integrating hidden lines, latent images and unlocking by embossing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910052573.1A CN109703227B (en) | 2019-01-21 | 2019-01-21 | Method for manufacturing anti-counterfeiting pattern integrating hidden lines, latent images and unlocking by embossing |
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| Publication Number | Publication Date |
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| CN109703227A CN109703227A (en) | 2019-05-03 |
| CN109703227B true CN109703227B (en) | 2024-01-05 |
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| CN114148102A (en) * | 2021-12-22 | 2022-03-08 | 贵州劲嘉新型包装材料有限公司 | Anti-counterfeiting packaging box printing structure with packaging film and printing method thereof |
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