CN110097817A - A kind of anti-fake two-dimension code label and preparation method thereof - Google Patents
A kind of anti-fake two-dimension code label and preparation method thereof Download PDFInfo
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- CN110097817A CN110097817A CN201810094024.6A CN201810094024A CN110097817A CN 110097817 A CN110097817 A CN 110097817A CN 201810094024 A CN201810094024 A CN 201810094024A CN 110097817 A CN110097817 A CN 110097817A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000007639 printing Methods 0.000 claims abstract description 110
- 239000000758 substrate Substances 0.000 claims abstract description 60
- 230000000873 masking effect Effects 0.000 claims abstract description 50
- 238000001035 drying Methods 0.000 claims description 15
- 230000008901 benefit Effects 0.000 claims description 13
- 238000003854 Surface Print Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000976 ink Substances 0.000 description 60
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
- G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F3/0297—Forms or constructions including a machine-readable marking, e.g. a bar code
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
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Abstract
The present invention relates to a kind of anti-fake two-dimension code labels and preparation method thereof, the anti-fake two-dimension code label includes transparent substrate layer, picture and text layer, photochromatic printing ink layer and masking chromatograph equipped with two dimensional code are successively printed in a side surface of the transparent substrate layer, in the masking chromatograph, away from a side surface of the photochromatic printing ink layer, mounting is equipped with black substrate layer, is equipped with mute oil reservoir away from a side surface of the picture and text layer of two dimensional code print in the transparent substrate layer.The preparation method of anti-fake two-dimension code label of the invention is simple, convenient, at low cost, and the two-dimension code label changeable colour that is prepared, variable data reduce two-dimension code anti-counterfeit product to the degree of dependence of software and production equipment, improve the anti-fake grade of product.
Description
Technical field
The present invention relates to printing technologies, more specifically to a kind of anti-fake two-dimension code label and preparation method thereof.
Background technique
Invisible two-dimensional codes relatively common at present are to utilize colourless stealthy consumptive material (such as fluorescent ink, fluorescence carbon dust, iridescent
Band, infrared printing ink etc.) two dimensional code is exported by way of printing or printing, but the two dimensional code exported substantially immobilizes
, and it is time-consuming too long, cost is too high.
Summary of the invention
The purpose of the present invention is to provide a kind of anti-fake two-dimension code labels and preparation method thereof, solve hidden in the prior art
The problem that shape planar bar code technology is single, time-consuming, at high cost.
The technical proposal for solving the technical problem of the invention is: a kind of anti-fake two-dimension code label, including transparent substrate
Layer successively prints picture and text layer, photochromatic printing ink layer and masking chromatograph equipped with two dimensional code in a side surface of the transparent substrate layer,
Away from a side surface of the photochromatic printing ink layer, mounting is equipped with black substrate layer to the masking chromatograph, deviates from the transparent substrate layer
The side surface print of the picture and text layer of the two dimensional code is equipped with mute oil reservoir.
In anti-fake two-dimension code label of the invention, dyne value >=38 of the transparent substrate layer.
In anti-fake two-dimension code label of the invention, the color of the two dimensional code is yellow, magenta, cyan, black, green
Color or white, the dot density of the color of the two dimensional code are 50%~100%.
In anti-fake two-dimension code label of the invention, the masking chromatograph is by face identical with the color of the two dimensional code
Color print sets to be formed.
In anti-fake two-dimension code label of the invention, the mute oil reservoir with a thickness of 8 μm~15 μm.
The present invention also provides the preparation methods of above-mentioned anti-fake two-dimension code label, comprising:
S1, the two dimensional code described in the side surface printing of the transparent substrate layer form the picture and text layer of two dimensional code；
S2, the two dimensional code picture and text layer away from the transparent substrate layer side printing photochromatic printing ink form the light
Sensitive ink layer；
S3, the masking is formed away from the side of the picture and text layer of two dimensional code printing masking color in the photochromatic printing ink layer
Chromatograph；
S4, the mute oil reservoir is formed away from the mute oil of side surface printing of the two dimensional code in the transparent substrate layer；
S5, the upper black substrate layer is mounted away from the side of the photochromatic printing ink layer in the masking chromatograph.
It in the preparation process in accordance with the present invention, further include step S0 before step S1: before printing by the transparent substrate
Twice into ground coating, corona is primary for layer.
In the preparation process in accordance with the present invention, in step s 2, the mesh number for printing halftone used in photochromatic printing ink is 250 mesh-
350 mesh print the sliding knife of benefit that scraper used in photochromatic printing ink is 60 ° -100 °, print photochromatic printing ink speed be 5m/min~
8m/min；It needs to carry out first time UV drying immediately after the completion of printing photochromatic printing ink, be carried out again after 5min-10min second
UV is dry；The UV luminous intensity of first time UV drying and the intensity of second of UV drying are respectively as follows: 50%UV dim light and 100%UV
Qiang Guang；The time that first time UV is dry and second of UV is dry is respectively 5s-8s.
In the preparation process in accordance with the present invention, in step s3, the halftone mesh number of printing masking color is -450 mesh of 300 mesh, print
The sliding knife of benefit that scraper used in brush masking color is 60 ° -100 °, the speed of printing masking color are 10m/min~15m/min, printing
The number for covering color is twice.
In the preparation process in accordance with the present invention, in step s 4, the number for printing mute oil is twice.
Implement anti-fake two-dimension code label and preparation method thereof of the invention, has the advantages that of the invention anti-fake
The preparation method of two-dimension code label is simple, convenient, at low cost, and the two-dimension code label changeable colour that is prepared, variable data reduce
Degree of dependence of the two-dimension code anti-counterfeit product to software and production equipment, improves the anti-fake grade of product.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of anti-fake two-dimension code label of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, anti-fake two-dimension code label of the invention and preparation method thereof is made furtherly
It is bright:
As shown in Figure 1, the anti-fake two-dimension code label includes transparent substrate layer the present invention relates to a kind of anti-fake two-dimension code label
1, picture and text layer 2, photochromatic printing ink layer 3 and masking chromatograph 4 equipped with two dimensional code are successively printed in a side surface of transparent substrate layer 1,
Covering chromatograph 4, mounting is equipped with black substrate layer 5 away from a side surface of photochromatic printing ink layer 3, in transparent substrate layer 1 away from two dimensional code
The side surface print of picture and text layer 2 is equipped with mute oil reservoir 6.
Wherein, transparent substrate layer 1 can be what substrate transparent made of PMMA, PC etc. was formed, dyne of transparent substrate
Value >=38.The color of two dimensional code can be yellow, magenta, cyan, black, green or white, the site of the color of two dimensional code
Density is 50%~100%.Two dimensional code uses digital printing, and ink used is digital e-inks.
Masking chromatograph 4 is to be set to be formed by color identical with the color of two dimensional code print.That is yellow two dimensional code corresponds to yellow
Color is covered, magenta two dimensional code corresponds to magenta masking color, and cyan two dimensional code corresponds to cyan masking color, and black two dimensional code corresponds to black
Color covers color, the corresponding green masking color of green two dimensional code, the corresponding white masking color of white two dimensional code.And masking chromatograph 4 is used
Ink is identical as the ink of two dimensional code or the similar ink of performance.
Mute oil reservoir 6 with a thickness of 8 μm~15 μm.Mute oil reservoir 6 must have certain frosted finish effect, have surface centainly
Mist degree, improve the concealment effect of two dimensional code.
Wherein photochromatic printing ink layer 3, masking chromatograph 4, mute oil reservoir 6 are that full version prints to be formed.Photochromatic printing ink layer 3 is by transparent
What photochromatic printing ink printing was formed, wherein photochromatic printing ink is ink in the prior art, is no longer described in detail here.
Black substrate layer 5 can be black substrate material, such as black PET, black PC, black PI；Black substrate layer 5 can also
To print high masking on transparent material black to be, but must by non-printing surface mounting on masking color, this be in order to avoid ink with
The direct contact of ink causes to present a contrast to show two dimensional code problem between masking color and two dimensional code.Due to black
Color absorbs the light that subwave is long in ultraviolet light, so that photochromatic printing ink is showed another color, convenient for the reading of two dimensional code.
The invention further relates to the preparation methods of above-mentioned anti-fake two-dimension code label, comprising:
S0, transparent substrate layer 1 is coated with twice into ground, corona is primary；
S1, the picture and text layer 2 for forming two dimensional code by digital printing two dimensional code in a side surface of transparent substrate layer 1；
S2, photochromatic printing ink is printed with deviating from the side full version of transparent substrate layer 1 in the picture and text layer 2 of two dimensional code using net volume machine
Form photochromatic printing ink layer 3；The mesh number for printing halftone used in photochromatic printing ink is -350 mesh of 250 mesh, is printed used in photochromatic printing ink
The sliding knife of the benefit that scraper is 60 ° -100 °, the speed for printing photochromatic printing ink is 5m/min~8m/min；
It needs to carry out first time UV drying immediately after the completion of printing photochromatic printing ink, be carried out again after 5min-10min second
UV is dry；The UV luminous intensity of first time UV drying and the intensity of second of UV drying are respectively as follows: 50%UV dim light and 100%UV
Qiang Guang, i.e. first time UV are dry and two UV lamps of the dry configuration of second of UV are dried, and 50%UV is arranged in a UV lamp
The strong light of 100%UV is arranged in dim light, another UV lamp；The time that first time UV is dry and second of UV is dry is respectively 5s-8s；
S3, masking color shape is printed in photochromatic printing ink layer 3 with deviating from the side full version of the picture and text layer 2 of two dimensional code using net volume machine
At masking chromatograph 4；The halftone mesh number of printing masking color is -450 mesh of 300 mesh, -400 mesh of preferably 350 mesh；Printing masking color institute
The sliding knife of the benefit that scraper is 60 ° -100 °, the speed of printing masking color are 10m/min~15m/min, time of printing masking color
Number is twice；
S4, mute oil is printed with deviating from a side surface full version of the picture and text layer 2 of two dimensional code in transparent substrate layer 1 using net volume machine
Form mute oil reservoir 6；The number for printing mute oil is twice；Mute oil must have certain frosted finish effect, have surface certain
Mist degree improves the concealment effect of two dimensional code；
S5, upper black substrate layer 5 is mounted away from the side of photochromatic printing ink layer 3 in masking chromatograph 4.
By the way that using digital, screen printing technique, preparing changeable colour using processing procedure collocation and color overlaid principle can parameter
According to invisible two-dimensional codes.When observing under visible light, two dimensional code is almost invisible, and is placed under ultraviolet source and observes, and covers color
It changes with two dimensional code color and generates color difference and display two dimensional code, realize the concealment effect of two dimensional code, improve two dimension
Code anti-counterfeiting performance, scans the two-dimensional code the true and false that can verify that product with mobile phone under ultraviolet source, improves anti-fake grade.
It is simple process of the invention, convenient, variable two-dimension code is printed by digital printer, silk-screen printing photochromatic printing ink,
Black and mute oil can prepare changeable colour variable data invisible two-dimensional codes.When observing under visible light, two dimensional code is hidden very well,
It is visually invisible, and under ultraviolet source irradiation, two dimensional code is shown, and can be carried out quickly scanning by scanning device and be read
It takes；It can verify that authenticity of products with mobile phone two-dimension code, it is convenient, fast, improve anti-fake grade.On the basis of two dimensional code stealth
On, keep two-dimensional code data variable, reduces two-dimension code anti-counterfeit product to the degree of dependence of software and production equipment, promote the anti-of product
Pseudo- grade.
Anti-fake two-dimension code label of the invention can be applied to the variable datas antifalsification label such as wine, food, health care product, skin care item
Production.
Embodiment 1:
Before printing, transparent substrate layer 1 is coated with twice into ground, corona is primary, dyne value >=38 of transparent substrate layer 1.
Picture and text layer 2 is formed by yellow two dimensional code on data printing in a side surface of transparent substrate layer 1, the dot density of yellow is
70%.Photochromatic printing ink, which is printed, with deviating from the side full version of transparent substrate layer 1 in picture and text layer 2 using net volume machine forms photochromatic printing ink layer
3, the mesh number for printing halftone used in photochromatic printing ink is 250 mesh, prints the sliding knife of the benefit that scraper used in photochromatic printing ink is 60 °, print
The speed of scratch brushing sensitive ink is 5m/min；It needs to carry out first time UV drying immediately after the completion of printing photochromatic printing ink, after 5min
It is dry that second of UV is carried out again；It is weak that the UV luminous intensity of first time UV drying and the intensity of second of UV drying are respectively as follows: 50%UV
Light and the strong light of 100%UV；The time that first time UV is dry and second of UV is dry is respectively 5s.Become oil in light using net volume machine
The masking color that layer of ink 3 prints yellow twice with deviating from the side full version of the picture and text layer 2 of two dimensional code forms masking chromatograph 4, and printing hides
The halftone mesh number for covering color is 300 mesh, and the sliding knife of the benefit that scraper used in color is 60 ° is covered in printing, and the speed that color is covered in printing is
10m/min.Using net volume machine transparent substrate layer 1 away from two dimensional code picture and text layer 2 a side surface full version print it is mute twice
The mute oil reservoir 6 that oil is formed with a thickness of 8 μm.Upper black substrate layer 5, black are mounted away from the side of photochromatic printing ink layer 3 in masking chromatograph 4
Substrate layer 5 is formed by black PET.Preparation-obtained anti-fake two-dimension code label changeable colour, variable data, antifalse effect are excellent
It is good.
Embodiment 2:
Before printing, transparent substrate layer 1 is coated with twice into ground, corona is primary, dyne value >=38 of transparent substrate layer 1.
Picture and text layer 2, the dot density of magenta are formed by magenta two dimensional code on data printing in a side surface of transparent substrate layer 1
It is 50%.Photochromatic printing ink, which is printed, with deviating from the side full version of transparent substrate layer 1 in picture and text layer 2 using net volume machine forms photochromatic printing ink
Layer 3, the mesh number for printing halftone used in photochromatic printing ink is 350 mesh, prints the sliding knife of the benefit that scraper used in photochromatic printing ink is 100 °,
The speed for printing photochromatic printing ink is 8m/min；It is dry to need to carry out first time UV after the completion of printing photochromatic printing ink immediately, 10min with
It is dry to carry out second of UV again afterwards；The UV luminous intensity of first time UV drying and the intensity of second of UV drying are respectively as follows: 50%UV
Dim light and the strong light of 100%UV；The time that first time UV is dry and second of UV is dry is respectively 8s.Become using net volume machine in light
The masking color that ink layer 3 prints magenta twice with deviating from the side full version of the picture and text layer 2 of two dimensional code forms masking chromatograph 4, print
The halftone mesh number of brush masking color is 450 mesh, the sliding knife of benefit that scraper used in printing masking color is 100 °, the speed of printing masking color
For 15m/min.It is printed twice with deviating from a side surface full version of the picture and text layer 2 of two dimensional code using net volume machine in transparent substrate layer 1
Mute oil forms the mute oil reservoir 6 with a thickness of 15 μm.Upper black substrate layer 5 is mounted away from the side of photochromatic printing ink layer 3 in masking chromatograph 4,
Black substrate layer 5 is to print high masking black on transparent PC to be formed.Preparation-obtained anti-fake two-dimension code label changeable colour, can
Parameter evidence, antifalse effect are excellent.
Embodiment 3:
Before printing, transparent substrate layer 1 is coated with twice into ground, corona is primary, dyne value >=38 of transparent substrate layer 1.
Picture and text layer 2 is formed by two dimensional code white on data printing in a side surface of transparent substrate layer 1, white dot density is
50%.Photochromatic printing ink, which is printed, with deviating from the side full version of transparent substrate layer 1 in picture and text layer 2 using net volume machine forms photochromatic printing ink layer
3, the mesh number for printing halftone used in photochromatic printing ink is 300 mesh, prints the sliding knife of the benefit that scraper used in photochromatic printing ink is 80 °, print
The speed of scratch brushing sensitive ink is 6m/min；It needs to carry out first time UV drying immediately after the completion of printing photochromatic printing ink, after 8min
It is dry that second of UV is carried out again；It is weak that the UV luminous intensity of first time UV drying and the intensity of second of UV drying are respectively as follows: 50%UV
Light and the strong light of 100%UV；The time that first time UV is dry and second of UV is dry is respectively 7s.Become oil in light using net volume machine
The masking color that layer of ink 3 prints magenta twice with deviating from the side full version of the picture and text layer 2 of two dimensional code forms masking chromatograph 4, printing
The halftone mesh number for covering color is 380 mesh, and the sliding knife of the benefit that scraper used in color is 80 ° is covered in printing, and the speed that color is covered in printing is
12m/min.Using net volume machine transparent substrate layer 1 away from two dimensional code picture and text layer 2 a side surface full version print it is mute twice
The mute oil reservoir 6 that oil is formed with a thickness of 12 μm.Upper black substrate layer 5 is mounted away from the side of photochromatic printing ink layer 3 in masking chromatograph 4, it is black
Color substrate layer 5 is that black PI is formed.Preparation-obtained anti-fake two-dimension code label changeable colour, variable data, antifalse effect are excellent.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
Within all these improvement or transformation should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of anti-fake two-dimension code label, which is characterized in that including transparent substrate layer, in a side surface of the transparent substrate layer
Successively print is equipped with the picture and text layer, photochromatic printing ink layer and masking chromatograph of two dimensional code, deviates from the photochromatic printing ink in the masking chromatograph
The side surface mounting of layer is equipped with black substrate layer, in the transparent substrate layer away from a side surface of the picture and text layer of the two dimensional code
Print is equipped with mute oil reservoir.
2. anti-fake two-dimension code label according to claim 1, which is characterized in that dyne value of the transparent substrate layer >=
38。
3. anti-fake two-dimension code label according to claim 1, which is characterized in that the color of the two dimensional code is yellow, product
Red, cyan, black, green or white, the dot density of the color of the two dimensional code are 50%~100%.
4. anti-fake two-dimension code label according to claim 3, which is characterized in that the masking chromatograph be by with the two dimension
The color identical color print of code, which is set, to be formed.
5. anti-fake two-dimension code label according to claim 1, which is characterized in that the mute oil reservoir with a thickness of 8 μm~15 μ
m。
6. the preparation method of anti-fake two-dimension code label described in a kind of any one of claim 1-5 claim, which is characterized in that
Include:
S1, the two dimensional code described in the side surface printing of the transparent substrate layer form the picture and text layer of two dimensional code；
S2, the light is formed away from the side of transparent substrate layer printing photochromatic printing ink become oil in the picture and text layer of the two dimensional code
Layer of ink；
S3, the masking color is formed away from the side of the picture and text layer of two dimensional code printing masking color in the photochromatic printing ink layer
Layer；
S4, the mute oil reservoir is formed away from the mute oil of side surface printing of the two dimensional code in the transparent substrate layer；
S5, the upper black substrate layer is mounted away from the side of the photochromatic printing ink layer in the masking chromatograph.
7. preparation method according to claim 6, which is characterized in that further include step S0 before step S1: printing
Preceding to be coated with the transparent substrate layer twice into ground, corona is primary.
8. preparation method according to claim 6, which is characterized in that in step s 2, print net used in photochromatic printing ink
The mesh number of version is -350 mesh of 250 mesh, prints the sliding knife of the benefit that scraper used in photochromatic printing ink is 60 ° -100 °, prints photochromatic printing ink
Speed is 5m/min~8m/min；
It needs to carry out first time UV drying immediately after the completion of printing photochromatic printing ink, it is dry to carry out second of UV again after 5min-10min
It is dry；The dry intensity of the UV luminous intensity and second of UV that first time UV is dried is respectively as follows: 50%UV dim light and 100%UV is strong
Light；The time that first time UV is dry and second of UV is dry is respectively 5s-8s.
9. preparation method according to claim 6, which is characterized in that in step s3, the halftone mesh number of printing masking color
For -450 mesh of 300 mesh, the sliding knife of the benefit that scraper used in color is 60 ° -100 ° is covered in printing, and the speed that color is covered in printing is 10m/
The number of min~15m/min, printing masking color are twice.
10. preparation method according to claim 6, which is characterized in that in step s 4, the number for printing mute oil is two
It is secondary.
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| CN201810094024.6A CN110097817B (en) | 2018-01-31 | 2018-01-31 | Anti-counterfeiting two-dimensional code label and preparation method thereof |
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| CN201810094024.6A CN110097817B (en) | 2018-01-31 | 2018-01-31 | Anti-counterfeiting two-dimensional code label and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109117920A (en) * | 2018-09-25 | 2019-01-01 | 上海宏盾防伪材料有限公司 | A kind of two dimensional code with antiforge laser holographic pattern |
| CN115723458A (en) * | 2022-11-18 | 2023-03-03 | 至远彩色印刷工业（惠州）有限公司 | Anti-counterfeiting latent image printing method, printing device and latent image anti-counterfeiting paper |
| CN116744210A (en) * | 2023-05-22 | 2023-09-12 | 宝德(东莞)科技有限公司 | Method for making acoustic shell with shielding effect |
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| CN105835553A (en) * | 2016-05-27 | 2016-08-10 | 深圳九星印刷包装集团有限公司 | Manufacturing method for invisible anti-counterfeiting mark |
| CN205984129U (en) * | 2016-08-30 | 2017-02-22 | 无锡新光印防伪技术有限公司 | False proof mark with variable stealthy information two -dimensional code |
| CN206697135U (en) * | 2017-02-09 | 2017-12-01 | 广东美纳防伪科技有限公司 | A protective shell with an anti-counterfeiting mark |
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| CN109117920A (en) * | 2018-09-25 | 2019-01-01 | 上海宏盾防伪材料有限公司 | A kind of two dimensional code with antiforge laser holographic pattern |
| CN115723458A (en) * | 2022-11-18 | 2023-03-03 | 至远彩色印刷工业（惠州）有限公司 | Anti-counterfeiting latent image printing method, printing device and latent image anti-counterfeiting paper |
| CN116744210A (en) * | 2023-05-22 | 2023-09-12 | 宝德(东莞)科技有限公司 | Method for making acoustic shell with shielding effect |
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