CN114892438B - Preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper - Google Patents
Preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper Download PDFInfo
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- CN114892438B CN114892438B CN202111339467.5A CN202111339467A CN114892438B CN 114892438 B CN114892438 B CN 114892438B CN 202111339467 A CN202111339467 A CN 202111339467A CN 114892438 B CN114892438 B CN 114892438B
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- dot matrix
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- counterfeiting
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
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Abstract
The invention relates to a preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper, which is characterized by comprising the following steps: s1, preparing a positioning holographic master mask; s2, preparing a laser etching dot matrix miniature image text printing plate roller; s3, stamping the positioning holographic laser film and printing a water-soluble lattice miniature image-text; s4, washing aluminum to remove a metal aluminum layer on the dot matrix miniature image-text, drying and rolling; s5, manufacturing the positioning holographic laser anti-counterfeiting paper. The method has the advantages of large format, rapid plate making, high resolution micro graphic text, naked eye recognition and the like; the full-page miniature image text anti-counterfeiting is superimposed on the basis of positioning the holographic laser sheet, so that the anti-counterfeiting grade of the paper is improved; providing a higher level of anti-counterfeiting capability for commodity packages.
Description
Technical Field
The invention relates to the technical field of anti-counterfeiting paper preparation, in particular to a preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper.
Background
The positioning holographic laser paper can improve the decoration performance of commodity printing, has certain anti-counterfeiting performance and can increase the added value of commodities.
At present, the miniature character anti-counterfeiting effect is manufactured on the positioning holographic laser anti-counterfeiting paper, and two methods of holographic lithography and nickel plate laser etching are generally adopted. The holographic lithography method has the defects of long manufacturing period, synchronous lithography with other holographic effects and inflexible plate making. When the high-resolution micro image text is etched on the metal nickel master plate, the precision of the lens group and the moving platform is limited, a large-area image text cannot be manufactured, the size which can be etched is about 100 square millimeters, the anti-counterfeiting plate manufactured by the two methods needs to be subjected to anti-counterfeiting identification by means of a magnifying glass about 100 times, and the identification of a terminal consumer is difficult.
Disclosure of Invention
In order to improve the speed and efficiency of manufacturing the miniature character anti-counterfeiting plate and realize naked eye anti-counterfeiting recognition, the invention provides a preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the preparation method of the laser etching dot matrix imaging encryption anti-counterfeiting paper is characterized by comprising the following steps of:
s1, preparing a positioning holographic master mask;
s2, preparing a laser etching dot matrix miniature image text printing plate roller;
s3, stamping the positioning holographic laser film and printing a water-soluble lattice miniature image-text;
s4, washing aluminum to remove a metal aluminum layer on the dot matrix miniature image-text, drying and rolling;
s5, manufacturing the positioning holographic laser anti-counterfeiting paper.
Further, in step S2, the method for preparing the printing roller for laser etching the dot matrix micro image-text includes using laser to etch uniformly arranged dots in the area outside the micro image-text area to construct the dot matrix micro image-text.
Further, the dots have a diameter of 50-100 μm.
Further, any one of the evenly distributed dots is arranged in an array such as a rectangle, a diamond or a honeycomb with the nearest 3 dots on the upper, lower, left and right sides.
Further, in step S3, the method of printing the water-soluble dot matrix micro-text includes embossing the information layer with a water-soluble acrylic resin coating layer using dot matrix roller coating.
Further, in step S4, the washing of aluminum with water includes brushing with a counter-rotating brush roller.
Further, after the back brushing, too many water drops attached to the laser film need to be removed.
Compared with the prior art, the invention has the beneficial effects that: the method has the advantages of large format, rapid plate making, high resolution micro graphic text, naked eye recognition and the like; the full-page miniature image text anti-counterfeiting is superimposed on the basis of positioning the holographic laser sheet, so that the anti-counterfeiting grade of the paper is improved; providing a higher level of anti-counterfeiting capability for commodity packages.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic diagram of a target structure for implementing the method of the present invention in positioning a two-sided nanoimprint;
fig. 3 is a state diagram of the method of the present invention when it is carried out.
Detailed Description
As shown in fig. 1, a method for preparing laser etching dot matrix imaging encryption anti-counterfeiting paper is characterized by comprising the following steps:
s1, preparing a positioning holographic master mask; in the embodiment, the plate making can be performed according to the conventional holographic positioning laser technology.
S2, preparing a laser etching dot matrix miniature image text printing plate roller;
specifically, as shown in fig. 2, in this embodiment, circular dots 1 with a diameter of 50-100 μm are etched by laser, and any one of the dots 1 that is uniformly distributed is arranged in an array such as a rectangle, a diamond, or a honeycomb with the nearest 3 dots on the upper, lower, left, and right sides thereof.
The imaging principle is as follows: the small dots smaller than 100 μm cannot be identified by human eyes, but if a part of small dots are missing in the small dots arranged in a dense array, the missing image and text can be supplemented by the imagination of human brain, so that the miniature anti-counterfeiting image and text can be constructed.
S3, stamping the positioning holographic laser film and printing a water-soluble lattice miniature image-text;
specifically, before the embossed holographic laser film enters an aluminizing process, the embossed holographic laser film is firstly embossed on an information layer by using a dot matrix lattice point roll-coating water-soluble acrylic resin coating, and then aluminizing operation is carried out in the next step.
S4, washing aluminum to remove a metal aluminum layer on the dot matrix miniature image-text, drying and rolling;
specifically, in the step, firstly, a laser film is cleaned by using an aluminum washing device, and water-soluble acrylic resin below a metal aluminum layer of a dot matrix miniature graph part is dissolved, washed out, dried and wound. In the cleaning process, the aluminum washing equipment can adopt a first water tank 1 and a second water tank 2, a brush roller 3 which rotates reversely can be arranged in the first water tank 1 to brush, so that the cleaning efficiency is improved, then the second water washing is carried out in the second water tank 2, the residues can be further removed through twice water washing, a pair of squeeze rollers 4 are arranged behind the second water tank 2 and rotate simultaneously, excessive water drops attached to a laser film are squeezed away, and finally the laser film can be dried through a drying box 5.
On the washed positioning holographic laser film, an aluminized layer at the image-text part of the dot matrix is dissolved, and a miniature image-text anti-counterfeiting structure is constructed on the holographic laser film by utilizing the light shielding property of the aluminized layer and a huge number of light-transmitting dots generated by the dot matrix image.
Therefore, the miniature image-text manufactured by the method can detect the miniature image-text anti-counterfeiting information only by observing the miniature image-text through naked eyes.
S5, manufacturing positioning holographic laser anti-counterfeiting paper; the step can manufacture the dot matrix imaging encryption anti-counterfeiting paper according to the normal laser paper production process.
The method has the advantages of large format, rapid plate making, high resolution micro graphic text, naked eye recognition and the like; the full-page miniature image text anti-counterfeiting is superimposed on the basis of positioning the holographic laser sheet, so that the anti-counterfeiting grade of the paper is improved; providing a higher level of anti-counterfeiting capability for commodity packages.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (3)
1. A method for preparing laser etching dot matrix imaging encryption anti-counterfeiting paper is characterized in that,
the method comprises the following steps:
s1, preparing a positioning holographic master mask;
s2, preparing a laser etching dot matrix miniature image text printing plate roller;
s3, stamping the positioning holographic laser film and printing a water-soluble lattice miniature image-text;
s4, washing aluminum to remove a metal aluminum layer on the dot matrix miniature image-text, drying and rolling;
s5, manufacturing positioning holographic laser anti-counterfeiting paper;
in the step S2, the method for preparing the laser etching dot matrix miniature image-text printing plate roller comprises the steps of using laser to etch evenly distributed dots in the area outside the miniature image-text area to construct dot matrix miniature image-text;
the diameter of the mesh point is 50-100 mu m;
any one of the evenly distributed dots is arranged in a rectangular, diamond or honeycomb array with the nearest 3 dots on the upper, lower, left and right sides;
in step S3, the method for printing the water-soluble dot matrix micro-image text comprises the step of embossing by using dot matrix roller coating water-soluble acrylic resin coating on the information layer.
2. The method for preparing laser etching dot matrix imaging encryption anti-counterfeiting paper according to claim 1, wherein in the step S4, brushing is performed by adopting a counter-rotating brush roller during aluminum washing.
3. The method for preparing the laser etching dot matrix imaging encryption anti-counterfeiting paper according to claim 2, wherein excessive water drops attached to the laser film are removed after reverse brushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339467.5A CN114892438B (en) | 2021-11-12 | 2021-11-12 | Preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111339467.5A CN114892438B (en) | 2021-11-12 | 2021-11-12 | Preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper |
Publications (2)
| Publication Number | Publication Date |
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| CN114892438A CN114892438A (en) | 2022-08-12 |
| CN114892438B true CN114892438B (en) | 2023-06-27 |
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| CN202111339467.5A Active CN114892438B (en) | 2021-11-12 | 2021-11-12 | Preparation method of laser etching dot matrix imaging encryption anti-counterfeiting paper |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278873C (en) * | 2003-08-15 | 2006-10-11 | 伟诚实业（深圳）有限公司 | Processing method of location transfer red aluminium plating material |
| CN101487201A (en) * | 2009-02-26 | 2009-07-22 | 林加宝 | Production method for anti-counterfeit laser locating paperboard |
| CN201439579U (en) * | 2009-06-08 | 2010-04-21 | 广西真龙彩印包装有限公司 | Cigarette wrapping paper with laser miniature anti-counterfeit pictures and words |
| CN102490421B (en) * | 2011-10-26 | 2014-07-16 | 湖北联合天诚防伪技术股份有限公司 | Homographic dot printing color and preparation method thereof |
| CN103009843B (en) * | 2012-12-21 | 2016-05-11 | 常德金鹏印务有限公司 | The preparation method of located laser paper and the processing method of package |
| CN104149506B (en) * | 2014-04-22 | 2016-05-11 | 上海紫江喷铝环保材料有限公司 | A kind of transfer method of holographic false proof pattern of applicable gravure positioning overprinting |
| CN104309208A (en) * | 2014-10-17 | 2015-01-28 | 苏州华源包装股份有限公司 | Anti-counterfeiting film, and manufacturing process and film-covering process of anti-counterfeiting film |
| CN106054290B (en) * | 2016-08-03 | 2018-06-19 | 绍兴京华激光材料科技有限公司 | A kind of composite membrane and preparation method thereof |
| CN207747557U (en) * | 2017-10-27 | 2018-08-21 | 福建泰兴特纸有限公司 | Convenient for exempting from the gold stamping version that positioning forms microscopic carvings laser effect |
| CN112562489B (en) * | 2020-12-15 | 2022-12-23 | 武汉华工图像技术开发有限公司 | Variable dynamic holographic anti-counterfeiting mark and preparation method thereof |
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