CN212830230U - Point light source reading laser encrypted holographic anti-counterfeiting gasket - Google Patents
Point light source reading laser encrypted holographic anti-counterfeiting gasket Download PDFInfo
- Publication number
- CN212830230U CN212830230U CN202021084073.0U CN202021084073U CN212830230U CN 212830230 U CN212830230 U CN 212830230U CN 202021084073 U CN202021084073 U CN 202021084073U CN 212830230 U CN212830230 U CN 212830230U
- Authority
- CN
- China
- Prior art keywords
- layer
- laser
- holographic anti
- light source
- laser encryption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model belongs to the technical field of it is anti-fake, concretely relates to holographic anti-fake gasket is encrypted to pointolite recognition laser. The laser encrypted holographic anti-counterfeiting gasket comprises a PET (polyethylene terephthalate) layer, an imaging layer, a laser encrypted information layer, an aluminum coating layer, a printing layer, a gluing agent layer, a foaming layer, a lower gluing agent layer and a lower PET layer which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encrypted information layer. The utility model discloses a grating space frequency and two parameters of grating angle in the grating lattice, preparation laser encryption information layer mould pressing version, with the duplication of laser encryption information on PET formation of image layer, form laser encryption information layer, when the consumer uses hand-held point light source equipment to shine holographic anti-fake gasket's front, will present hidden information, judge the product true and false, be one kind and be difficult to imitate but easy discernment's novel holographic anti-fake gasket.
Description
Technical Field
The utility model belongs to the technical field of it is anti-fake, concretely relates to holographic anti-fake gasket is encrypted to pointolite recognition laser.
Background
The traditional anti-counterfeiting gasket mainly has a sealing effect to prevent the product from being affected with damp, so that the product can be more effectively stored for a long time; and the product is well preserved in the transportation process, the bottle body does not scratch the bottle cap, and water in the bottle does not leak out. However, the competition of the sales markets of wine, beverages, health products and the like is increasingly violent, products of many manufacturers, especially famous brand products face huge counterfeit risks, and great cost is invested in anti-counterfeiting traceability.
The introduction of laser die stamping holographic anti-counterfeiting technology into China is that hundreds of production lines are introduced all over the country in the late 80 s and early 90 s, especially in the period from 1990 to 1994, and account for more than half of the world manufacturers at that time. In the early stage of introduction, the anti-counterfeiting technology indeed plays a certain anti-counterfeiting role, but as time goes on, the laser holographic image making technology is rapidly diffused, so that counterfeiters have broken through from various aspects nowadays, the anti-counterfeiting capability is almost completely lost, and people have to seek to improve the prior art. Therefore, optical image coding encryption technologies such as laser reading, optical micro-lithography, low-frequency lithography, random interference fringes and moire fringes are adopted, all the technologies need professional detection equipment to identify the authenticity, so that many consumers cannot use the anti-counterfeiting characteristics to identify the authenticity, and the market popularization is not facilitated.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: overcome prior art's not enough, provide a pointolite recognition laser and encrypt holographic anti-counterfeiting gasket, contain and hide digital coding information grating structure, when the consumer used hand-held point light source equipment to shine holographic anti-counterfeiting gasket's front, will present hidden information, judge the product true and false, be a novel holographic anti-counterfeiting gasket that is difficult to imitate but easy discernment.
Pointolite recognition laser encryption holographic anti-fake gasket, including from the top down consecutive last PET layer, formation of image layer, laser encryption information layer, aluminize layer, printing layer, last adhesive layer, foaming layer, lower adhesive layer and lower PET layer, laser encryption information layer the inside hide digital coding information.
The thickness of the upper PET layer and the lower PET layer is 12-50 μm.
The thickness of the aluminum plating layer is
The upper adhesive layer and the lower adhesive layer are both food-grade adhesives.
The foaming layer is made of PE foaming material and has the thickness of 0.5-3 mm.
The hidden digital coding information pattern in the laser encryption information layer is one or more than one of characters, letters, numbers, symbols or figures.
The hidden digital coding information in the laser encryption information layer is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and the grating lattices contain two parameters of grating space frequency and grating angle.
The preparation method of the point light source reading laser encryption holographic anti-counterfeiting gasket comprises the following steps:
(1) coating an imaging layer on the corona surface of the PET film, wherein the imaging layer cannot be separated from the PET;
(2) manufacturing a laser encrypted information layer mould pressing plate:
firstly, manufacturing a hidden pattern, placing the hidden pattern in a polar coordinate system, randomly extracting N (N is N x N) pixel points according to a system sampling method, wherein N is more than or equal to 4, respectively calculating the distance rho between each pixel point and the zero point of the coordinate system and the included angle theta, obtaining an N x N matrix according to the distance between each pixel point and the zero point of the coordinate system, and finally obtaining an empty-frequency gray-scale map matrix G; obtaining an n x n matrix according to an included angle between each pixel point and a zero point of a coordinate system, finally obtaining an angle gray-scale map matrix H, and completing plate making work of a laser encryption information layer mould pressing layer in a photoetching machine according to a space frequency gray-scale map matrix G and the angle gray-scale map matrix H to obtain a laser encryption information layer mould pressing plate;
(3) copying the laser encryption information on the mould pressing plate to the PET imaging layer by using a mould pressing and gravure printing integrated machine to form a laser encryption information layer; the mould pressing temperature is 150-: 40-80 ℃;
(4) aluminizing the laser encrypted information layer by adopting a vacuum aluminizing method;
(5) washing off the aluminum layer in the gravure water ink washing area by using an aluminum washing machine, wherein the drying temperature is 60-80 ℃;
(6) printing anti-counterfeiting characteristics such as pictures and texts, two-dimensional codes and the like in the aluminum washing area to form a printing layer;
(7) coating an adhesive layer on the surface of the printing layer and compounding the adhesive layer with a foaming layer;
(8) coating an adhesive layer on the other surface of the foaming layer to be compounded with the PET film,
(9) and die-cutting into single holographic gasket by using a die-cutting machine to obtain the holographic gasket.
The adhesive is prepared from the following raw materials in parts by weight: 0.5-2 parts of resin 3160B, 6-10 parts of ethyl acetate and 3-7 parts of resin 3160A.
The imaging layer in the step (1) is prepared from the following raw materials in parts by weight: 30-70 parts of resin FL-7103B, 0.03-0.07 part of assistant A1, 0.3-0.7 part of assistant B1, 0.5-2 parts of butyl ester and 1-3 parts of ethyl ester; the coating anilox roller is 100-300 meshes, and the wet coating amount is as follows: 4-8g/m2。
The manufacturing method of the laser encryption information layer mould pressing plate comprises the following steps:
(1) according to the design file, making a hidden pattern, establishing a polar coordinate system, and placing the pattern at a zero point in the polar coordinate system;
(2) the resolution of the pattern is a b, the pattern is composed of a b pixel points, N (N is N) pixel points are randomly extracted according to a system sampling method, wherein N is more than or equal to 4, and a computer is used for calculating the coordinate value (x) of each pixel point1，y1)、(x2，y2)、(x3，y3)、……(xN，yN) And the distance (p) of each pixel point from the zero point1、ρ2、ρ3、……ρN)；
(3) Calculating the included angle (theta) between each pixel point and the zero point according to the polar coordinate system formula x ═ rho cos theta and y ═ rho cos theta1、θ1、θ1、……θN)；
(4) L is an observation distance and is a fixed parameter, β is a grating angle, d is a grating pitch, λ is a laser wavelength, β can be obtained from tan β ═ ρ/L, and a grating pitch d can be obtained from a grating equation sin β ═ λ/d, at which time a two-dimensional parameter (d) can be established for each grating lattice (d is a fixed parameter)1，θ1)、(d2，θ2)、(d3，θ3)……(dN，θN)；
(5) From the grating pitch d of the N grating lattices, a matrix can be obtained as follows:
d1，d2，……………………dn
dn+1，dn+2，………………d2*n
………………………………
dn*(n-1)+1，dn*(n-1)+2，……dn*n
calculating to obtain the maximum value d of dmaxAnd a minimum value dminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N d can be mapped to another matrix G composed of gray values, and the matrix G constitutes a gray map as follows:
G1，G2，……………………Gn
Gn+1，Gn+2，………………G2*n
………………………………
Gn*(n-1)+1，Gn*(n-1)+2，……Gn*n；
(6) from the angles θ of the N grating lattices, a matrix can be obtained as follows:
θ1，θ2，……………………θn
θn+1，θn+2，………………θ2*n
………………………………
θn*(n-1)+1，θn*(n-1)+2，……θn*n
calculating to obtain the maximum value theta of thetamaxAnd minimum value thetaminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N θ can be mapped to another matrix H composed of gray values, and the matrix constitutes a gray map as follows:
H1，H2，……………………Hn
Hn+1，Hn+2，………………H2*n
………………………………
Hn*(n-1)+1，Hn*(n-1)+2，……Hn*n；
(7) manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, wherein the size of the exposure unit is a square with the side length of n/R mm, R is the resolution of a photoetching image, and R is more than 10dpi and less than 50800 dpi;
(8) and (4) forming the exposure unit array in the step (7) into a designed size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and developing and electroplating to obtain the laser encryption information layer mould pressing plate.
Compared with the prior art, the beneficial effects of the utility model are as follows:
1. the utility model discloses a mathematical algorithm realizes a new anti-fake characteristic.
2. The utility model discloses be convenient for the consumer carries out the true and false inquiry.
3. The utility model relates to a new anti-fake characteristic makes holographic anti-fake gasket have the exclusivity.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a hidden pattern in embodiment 1 of the present invention;
fig. 3 is a grayscale diagram corresponding to the matrix G in embodiment 1 of the present invention;
fig. 4 is a grayscale diagram corresponding to the matrix H in embodiment 1 of the present invention;
in the figure: 1. an upper PET layer; 2. an imaging layer; 3. a laser encrypted information layer; 4. plating an aluminum layer; 5. printing layer; 6. applying an adhesive layer; 7. a foamed layer; 8. a lower adhesive layer; 9. a lower PET layer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
Example 1
As shown in figure 1, the point light source reading laser encryption holographic anti-counterfeiting gasket comprises a PET layer 1, an imaging layer 2, a laser encryption information layer 3, an aluminum coating layer 4, a printing layer 5, an upper adhesive layer 6, a foaming layer 7, a lower adhesive layer 8 and a lower PET layer 9 which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encryption information layer 2.
The thickness of the aluminum coating layer 4 is
The foaming layer 7 is PE foaming cotton with the thickness of 2 mm.
The preparation method of the point light source reading laser encryption holographic anti-counterfeiting gasket comprises the following steps:
(1) coating an imaging layer on the corona surface of a 20-micron PET (polyethylene terephthalate) film produced by DuPont, wherein the imaging layer cannot be separated from the PET; the imaging layer formula comprises: 50kg of resin FL-7103B, 50g of assistant A1, 500g of assistant B1, 1kg of butyl ester and 2kg of ethyl ester. Coating an anilox roller: 180 meshes, wet coating amount: 6g/m2。
(2) Manufacturing a laser encrypted information layer mould pressing plate:
firstly, manufacturing a hidden pattern, placing the hidden pattern in a polar coordinate system, randomly extracting N (N is N x N) pixel points according to a system sampling method, wherein N is more than or equal to 4, respectively calculating the distance rho between each pixel point and the zero point of the coordinate system and the included angle theta, obtaining an N x N matrix according to the distance between each pixel point and the zero point of the coordinate system, and finally obtaining an empty-frequency gray-scale map matrix G; obtaining an n x n matrix according to an included angle between each pixel point and a zero point of a coordinate system, finally obtaining an angle gray-scale map matrix H, and completing plate making work of a laser encryption information layer mould pressing layer in a photoetching machine according to a space frequency gray-scale map matrix G and the angle gray-scale map matrix H to obtain a laser encryption information layer mould pressing plate;
(3) copying the laser encryption information on the mould pressing plate to the PET imaging layer by using a mould pressing and gravure printing integrated machine to form a laser encryption information layer; the mould pressing temperature is 160 ℃, and the pressure is 0.25 MPa. The type of the water washing ink adopted by the gravure water washing ink is 0720, the viscosity (coating #4) is 30', the drying temperature: at 55 ℃.
(4) Aluminizing the laser encrypted information layer by adopting a vacuum aluminizing method;
(5) washing off the aluminum layer in the gravure water ink washing area by using an aluminum washing machine, wherein the drying temperature is 70 ℃;
(6) printing image-text and two-dimensional code anti-counterfeiting characteristics in the aluminum washing area to form a printing layer;
(7) coating an adhesive layer on the surface of the printing layer and compounding the adhesive layer with a foaming layer, wherein the adhesive ratio is as follows: 3160 kg of ethyl acetate, 8kg of ethyl acetate and 6kg of ethyl acetate;
(8) coating an adhesive layer on the other surface of the foaming layer and compounding with a 50 mu m PET film,
(9) and die-cutting into single holographic gasket by using a die-cutting machine to obtain the holographic gasket.
The manufacturing method of the laser encryption information layer mould pressing plate comprises the following steps:
(1) according to the design file, making a hidden pattern, establishing a polar coordinate system, and placing the pattern at a zero point in the polar coordinate system;
(2) the resolution of the pattern is a b, the pattern is composed of a b pixel points, N (N is N) pixel points are randomly extracted according to a system sampling method, wherein N is more than or equal to 4, and a computer is used for calculating the coordinate value (x) of each pixel point1，y1)、(x2，y2)、(x3，y3)、……(xN，yN) And the distance (p) of each pixel point from the zero point1、ρ2、ρ3、……ρN)；
(3) Calculating the included angle (theta) between each pixel point and the zero point according to the polar coordinate system formula x ═ rho cos theta and y ═ rho cos theta1、θ1、θ1、……θN)；
(4) L is an observation distance and is a fixed parameter, β is a grating angle, d is a grating pitch, λ is a laser wavelength, β can be obtained from tan β ═ ρ/L, and a grating pitch d can be obtained from a grating equation sin β ═ λ/d, at which time a two-dimensional parameter (d) can be established for each grating lattice (d is a fixed parameter)1，θ1)、(d2，θ2)、(d3，θ3)……(dN，θN)；
(5) From the grating pitch d of the N grating lattices, a matrix can be obtained as follows:
d1，d2，……………………dn
dn+1，dn+2，………………d2*n
………………………………
dn*(n-1)+1，dn*(n-1)+2，……dn*n
calculating to obtain the maximum value d of dmaxAnd a minimum value dminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N d can be mapped to another matrix G composed of gray values, and the matrix G constitutes a gray map as follows:
G1，G2，……………………Gn
Gn+1，Gn+2，………………G2*n
………………………………
Gn*(n-1)+1，Gn*(n-1)+2，……Gn*n；
(6) from the angles θ of the N grating lattices, a matrix can be obtained as follows:
θ1，θ2，……………………θn
θn+1，θn+2，………………θ2*n
………………………………
θn*(n-1)+1，θn*(n-1)+2，……θn*n
calculating to obtain the maximum value theta of thetamaxAnd minimum value thetaminThe minimum value corresponds to a gray value of 0 and the maximum value corresponds to a gray value of 255, and according to the corresponding relationship, the values of N θ can be mapped to another matrix H composed of gray values, and the matrix constitutes a gray map as follows:
H1，H2，……………………Hn
Hn+1，Hn+2，………………H2*n
………………………………
Hn*(n-1)+1，Hn*(n-1)+2，……Hn*n；
(7) manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, wherein the size of the exposure unit is a square with the side length of n/R mm, R is the resolution of a photoetching image, and R is more than 10dpi and less than 50800 dpi;
(8) and (4) forming the exposure unit array in the step (7) into a designed size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and developing and electroplating to obtain the laser encryption information layer mould pressing plate.
From the design file, a hidden pattern "is made as shown in fig. 2, a polar coordinate system is established, and the pattern" is placed at a zero point in the polar coordinate system.
Choosing a pattern "o" where 16 points (N4 x 4) are extracted, the 16 sampling points of which are generated by the computer with distances p from the zero point of: 10. 7.7, 5.4, 8.3, 10, 8.3, 5.4, 7.7, 11, 7.7, 5.4, 8.3, 10, 8.3, 5.4, 7.7. The calculated theta angles are respectively: 0 °, 27 °, 53 °, 76 °, 90 °, 104 °, 127 °, 153 °, 180 °, 207 °, 233 °, 256 °, 270 °, 284 °, 307 °, 333 °. The maximum is 333 °, the minimum is 0 °, the value according to ρ, and the observation distance L, according to the grating angle formula β arctan ρ/L and the grating equation sin β λ/d, λ 650 × 10-9m, the grating pitch d can be obtained, and the 16 values of d are mapped to another matrix G composed of space-frequency gray values, which constitutes a gray map as follows:
255，127，0，160
255，160，0，127
255，127，0，160
255，212，0，127。
the gray-scale value matrix G corresponds to a gray-scale map as shown in fig. 3.
The 16 θ values are mapped to another matrix H of angle gray values, which forms a gray map as follows:
0，21，41，58
69，80，97，117
137，158，178，195
206，217，234，255。
the gray scale matrix H corresponds to a gray scale map as shown in fig. 4.
And manufacturing an exposure unit according to the photoetching space frequency gray matrix G and the grating angle gray matrix H, then forming an exposure unit array into a designed size, manufacturing the exposure unit array on a photoetching offset plate through a photoetching process, and obtaining a laser encryption information layer mould pressing plate containing hidden pattern diamond information after development and electroplating.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (7)
1. A pointolite recognition laser encryption holographic anti-fake gasket which characterized in that: the multifunctional laser encryption device comprises an upper PET layer (1), an imaging layer (2), a laser encryption information layer (3), an aluminum coating layer (4), a printing layer (5), an upper adhesive layer (6), a foaming layer (7), a lower adhesive layer (8) and a lower PET layer (9) which are sequentially connected from top to bottom, wherein digital coding information is hidden in the laser encryption information layer (3).
2. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the thickness of the upper PET layer (1) and the lower PET layer (9) is 12-50 μm.
3. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the thickness of the aluminum-plated layer (4) is 30-80 nm.
4. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the upper adhesive layer (6) and the lower adhesive layer (8) are both food-grade adhesives.
5. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the foaming layer (7) is made of PE foaming material, and the thickness is 0.5-3 mm.
6. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the hidden digital coding information pattern in the laser encryption information layer (3) is one or more than one of characters, letters, numbers, symbols or figures.
7. The point light source reading laser encryption holographic anti-counterfeiting gasket according to claim 1, characterized in that: the hidden digital coding information in the laser encryption information layer (3) is composed of a plurality of square grating lattice arrays, the processing mode is laser etching, and the grating lattices contain two parameters of grating space frequency and grating angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021084073.0U CN212830230U (en) | 2020-06-12 | 2020-06-12 | Point light source reading laser encrypted holographic anti-counterfeiting gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021084073.0U CN212830230U (en) | 2020-06-12 | 2020-06-12 | Point light source reading laser encrypted holographic anti-counterfeiting gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212830230U true CN212830230U (en) | 2021-03-30 |
Family
ID=75172213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021084073.0U Active CN212830230U (en) | 2020-06-12 | 2020-06-12 | Point light source reading laser encrypted holographic anti-counterfeiting gasket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212830230U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559572A (en) * | 2020-06-12 | 2020-08-21 | 山东泰宝信息科技集团有限公司 | Point light source recognition laser encryption holographic anti-counterfeiting gasket and preparation method thereof |
-
2020
- 2020-06-12 CN CN202021084073.0U patent/CN212830230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111559572A (en) * | 2020-06-12 | 2020-08-21 | 山东泰宝信息科技集团有限公司 | Point light source recognition laser encryption holographic anti-counterfeiting gasket and preparation method thereof |
| CN111559572B (en) * | 2020-06-12 | 2023-06-02 | 山东泰宝信息科技集团有限公司 | Point light source reading laser encryption holographic anti-counterfeiting gasket and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102298874B (en) | Anti-counterfeiting identification structure and manufacturing method | |
| CN204833342U (en) | Sawtooth sign indicating number printed matter that guards against falsification | |
| CN205193849U (en) | Two -dimensional code antifalsification label based on rice paper | |
| CN104070869A (en) | Manufacturing method for double-layer holographic anti-counterfeiting film | |
| CN212830230U (en) | Point light source reading laser encrypted holographic anti-counterfeiting gasket | |
| CN102184675A (en) | Random characteristic anti-counterfeiting label and preparation method thereof | |
| CN106611205A (en) | Multi-layer overprinted two-dimensional code anti-counterfeit label with gradually changed colors | |
| CN111645437B (en) | Laser encrypted anti-counterfeiting transfer film and preparation method thereof | |
| CN103500533A (en) | Random embossed anti-counterfeit label and manufacturing method thereof | |
| CN1919616A (en) | Numerical counterfeit deterrence certificate and method for making the same | |
| CN111559572B (en) | Point light source reading laser encryption holographic anti-counterfeiting gasket and preparation method thereof | |
| CN212010135U (en) | Point light source recognizing and reading laser encrypted paper anti-counterfeiting mark | |
| CN205354524U (en) | Protect card membrane antifalsification label | |
| CN111554178A (en) | Point light source recognition laser encryption paper anti-counterfeiting mark and preparation method thereof | |
| CN202058369U (en) | Gravure and flexo printing combined scratch-off holographic film anti-counterfeiting label | |
| CN111653188B (en) | Laser encrypted anti-counterfeiting adhesive tape and preparation method thereof | |
| CN201765751U (en) | Microlens anti-counterfeiting mark | |
| CN111653186A (en) | Laser encrypted anti-counterfeiting stay wire and preparation method thereof | |
| CN111645436B (en) | Laser encrypted anti-counterfeiting transfer paper and preparation method thereof | |
| CN204322645U (en) | A kind of double-deck holographic anti-counterfeiting film | |
| CN212010137U (en) | Point light source reading laser encryption anti-fake tag | |
| CN211207808U (en) | Anti-counterfeiting label with infrared laser invisible code and holographic information | |
| CN207833780U (en) | Variable intelligence micro information point anti-counterfeiting mark | |
| CN212010136U (en) | Point light source recognizing laser encrypted plastic film anti-counterfeiting mark | |
| CN111653187B (en) | Laser-encrypted anti-counterfeiting Kouxia flower and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |