Micro-nano anti-counterfeiting printing method for anti-counterfeiting line of wine box

Abstract

The invention discloses a micro-nano anti-counterfeiting printing method for an anti-counterfeiting line of a wine box, which comprises the following steps of: typesetting and designing a photoetching anti-counterfeiting line on the wine box; an anti-counterfeiting line is designed and pixelated to form a grating image-text, a foreground pattern is designed and pixelated to form a direct-writing image-text, the direct-writing image-text is composed of a plurality of micron-sized direct-writing partitions, and each direct-writing partition contains an anti-counterfeiting font; the graphic and text information is prepared into an anti-fake product photoetching film through a photoetching technology, and the anti-fake product photoetching film is transferred to the wine box; overprinting golden UV ink; overprinting a black ink background; after the surface of the wine box is coated with a PET light film, snowflake ink is subjected to silk-screen printing, and printing of the wine box is completed; and carrying out anti-counterfeiting inspection. Compared with the prior art, micro-nano anti-counterfeiting printing is carried out on the anti-counterfeiting line with the width of 1 mm, it can be ensured that complete anti-counterfeiting fonts on the anti-counterfeiting line can be clearly checked through a microscope after offset printing and film covering are carried out on the wine box, extremely high concealment and good anti-counterfeiting capacity are achieved, and the yield of batch printing of the wine box is extremely high.

Description

Technical Field

[0001] The invention relates to the field of wine box anti-counterfeiting packaging, and in particular to a micro-nano anti-counterfeiting printing method for wine box anti-counterfeiting lines. Background Art

[0002] Microtext anti-counterfeiting technology is a technology that achieves anti-counterfeiting purposes by printing normal-sized or reduced text in a very small area. This technology has unique advantages and a wide range of application scenarios. Microtext is usually very small and difficult to see directly with the naked eye. It requires a magnifying glass to read clearly and is highly hidden. Copying microtext requires high-precision equipment and professional technology, which increases the difficulty of counterfeiting.

[0003] The existing micro-font anti-counterfeiting is mainly achieved by transferring anti-counterfeiting film in the anti-counterfeiting area of ​​the wine box, but the anti-counterfeiting area is large, usually in block shape, and the large area leads to poor concealment. In order to improve the anti-counterfeiting ability of wine products, our company needs to carry out micro-font anti-counterfeiting on a curved anti-counterfeiting line with a line width of 1-1.5mm. It is difficult to achieve with the existing methods and the technical difficulty is extremely high. There are mainly two problems that need to be solved: 1. The existing micro-fonts are large, and it is difficult to use high-quality photolithography anti-counterfeiting fonts on the narrower anti-counterfeiting line. 2. After the wine box packaging is transferred with the photolithography film with anti-counterfeiting text information, it is necessary to use an offset printing machine to overprint the ink multiple times. There will be overprint errors each time. The errors generated after multiple overprints are large, and it is impossible to ensure that the micro-fonts on the curved anti-counterfeiting line can be fully presented. Summary of the invention

[0004] The purpose of the present invention is to provide a micro-nano anti-counterfeiting printing method for wine box anti-counterfeiting lines that solves the above-mentioned problems.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: a micro-nano anti-counterfeiting printing method for wine box anti-counterfeiting thread, the method steps are as follows: The first step is to typeset and design a photolithography anti-counterfeiting line on the wine box, wherein the width of the anti-counterfeiting line is 1-1.5 mm; Step 2: Design an anti-counterfeiting line and pixelate it to form a grating image, design a foreground pattern and pixelate it to form a direct-writing image, wherein the direct-writing image is composed of a plurality of direct-writing partitions of micron size and arranged in a matrix, each of which contains an anti-counterfeiting font, and the anti-counterfeiting font is composed of a plurality of direct-writing photolithography units; The third step is to use photolithography technology to make an anti-counterfeiting photolithography film for the graphic information, and transfer it to the wine box through micro-nano transfer technology; Step 4: Overprint the gold UV ink on the photolithography film by an offset printing machine; Step 5: Overprint the black ink background on the wine box through an offset printing machine, and overprint the black ink with the gold UV ink to leak the micro-nano lithography text background; Step 6: After coating the PET light film on the surface of the wine box, silk-screen snowflake ink is printed, the snowflake ink hollows out the micro-nano photolithography text part, and UV light curing is performed to complete the printing of the wine box; Step 7. After lamination, conduct anti-counterfeiting inspection. If at least one complete column of anti-counterfeiting fonts can be clearly seen, it is qualified.

[0006] Preferably, in step one, the anti-counterfeiting thread is an arc-shaped laser anti-counterfeiting thread.

[0007] Preferably, in step 2, the direct-write partitions have at least 7 columns, each column of direct-write partitions is arranged side by side, and each column of direct-write partitions is arranged along the length direction of the anti-counterfeiting line.

[0008] Preferably, in step 2, the anti-counterfeiting fonts in the direct-writing partitions of the anti-counterfeiting lines are all the same, and a plurality of anti-counterfeiting lines are provided on the upper surface of the wine box, and the anti-counterfeiting fonts in each anti-counterfeiting line are different.

[0009] Preferably, in step three, the method for preparing the anti-counterfeiting product is as follows: the graphic information is obtained into a micro-nano structure by photolithography technology, and the obtained micro-nano structure is used as an imprint template to transfer the information thereon to a polycarbonate film, thereby preparing the anti-counterfeiting product.

[0010] Preferably, in step 4 and step 5, the offset printing position error of the offset printing press is no more than 0.5 mm.

[0011] Preferably, in step seven, a 150x microscope is used to perform an anti-counterfeiting inspection on the anti-counterfeiting thread. If at least one complete column of anti-counterfeiting fonts can be clearly seen, it is qualified.

[0012] Compared with the prior art, the advantages of the present invention are: the present invention realizes micro-nano anti-counterfeiting printing on a 1 mm wide anti-counterfeiting line, and can ensure that after offset printing and lamination of the wine box, the complete anti-counterfeiting fonts on the anti-counterfeiting line can be clearly viewed through a microscope, it has extremely high concealment and good anti-counterfeiting ability, and when realizing batch printing of wine boxes, the pass rate is extremely high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a process flow chart of the present invention; Figure 2 This is a design effect diagram of the anti-counterfeiting information in the anti-counterfeiting line of the present invention; Figure 3 It is an enlarged schematic diagram of the layout design of the anti-counterfeiting text of the present invention; Figure 4 This is a rendering of the appearance of the wine box product of the present invention after anti-counterfeiting printing; Figure 5-8 This is a diagram showing the effect of the anti-counterfeiting line of the present invention under a 150x magnifying glass after anti-counterfeiting printing.

[0014] 1. Wine box; 2. Anti-counterfeiting thread. DETAILED DESCRIPTION

[0015] The present invention will be further described below, specifically as follows: A method for printing micro-nano anti-counterfeiting lines on wine boxes, see Figure 1 , the method steps are as follows: The first step is to typeset and design a photolithography anti-counterfeiting line 2 on the wine box 1. The anti-counterfeiting line 2 is an arc-shaped laser anti-counterfeiting line 2. The design of the two photolithography anti-counterfeiting lines is one of the key technical points of the present invention. The photolithography anti-counterfeiting line 2 requires professional equipment to be counterfeited, and the counterfeiting is difficult. The arc design is more difficult to counterfeit than the straight line. In the width design of the two anti-counterfeiting lines, if the two anti-counterfeiting lines are less than 1 mm, it is easy to cause the anti-counterfeiting font to be completely or partially covered due to offset printing errors and shrinkage errors of the drawing film, and it cannot be recognized. If the line is wider, greater than 1.5 mm, not only is the concealment poor, but also the anti-counterfeiting effect will be reduced. After comprehensive consideration and multiple consultations with the manufacturer of the anti-counterfeiting photolithography film, it is determined that the width of the anti-counterfeiting line 2 is 1-1.5mm, see Figure 4 ; The second step is to conduct experimental tests and observe under a microscope that, under the conditions of multiple overprinting errors and maximum shrinkage errors of the wire drawing film, only about 140 μm of visible width is left in the security line 2. In order to facilitate the production of photolithography film for anti-counterfeiting products and ensure that at least one complete column of anti-counterfeiting fonts can be clearly seen in the security line 2 after multiple offset printings, our company has designed the anti-counterfeiting information of the security line 2, designed the security line 2 and pixelated it to form a grating image, designed the foreground pattern and pixelated it to form a direct-writing image, the direct-writing image is composed of multiple direct-writing partitions of micron size and arranged in a matrix, each direct-writing partition contains an anti-counterfeiting font, the anti-counterfeiting font is composed of multiple direct-writing lithography units, so as to facilitate the preparation of photolithography film by lithography equipment; according to the visible width left after overprinting and the limitation of lithography equipment, as a preferred solution, 1 Taking the anti-counterfeiting line 2 with a width of mm as an example, our company designs the direct writing partitions into 7 columns, each column of direct writing partitions is arranged side by side, and each column of direct writing partitions is arranged along the length direction of the anti-counterfeiting line 2. After design, the border design is removed, and the size of each direct writing partition is about 120μm, so as to ensure that after the wine box 1 is printed, at least one column of complete anti-counterfeiting fonts can be clearly seen in the anti-counterfeiting line 2. Figure 2 and Figure 3 .

[0016] In addition, in order to facilitate the design of the imprint template and simplify the difficulty of photolithography, the anti-counterfeiting fonts in the direct-writing partition of the anti-counterfeiting line 2 are all the same. A plurality of anti-counterfeiting lines 2 are provided on the upper surface of the wine box 1. The anti-counterfeiting fonts in each anti-counterfeiting line 2 are different. The anti-counterfeiting fonts are unconventional fonts and are all designed by the customer to increase the difficulty of counterfeiting.

[0017] The third step is to use photolithography technology to make anti-counterfeiting photolithography film. Figure 2 , and transferred onto the wine box 1 through a micro-nano transfer process; In order to realize the anti-counterfeiting of the designed micro-font, we commissioned Suzhou Soochow Weige Technology Group Co., Ltd. to customize it according to our needs and transfer it to the wine box 1. The method for preparing the anti-counterfeiting product is as follows: the graphic information is obtained by photolithography technology to obtain a micro-nano structure, and the obtained micro-nano structure is used as an embossing template to transfer the information on it to a polycarbonate film to prepare an anti-counterfeiting product. For details, please refer to the patent, CN202410779688.1 A method for preparing a micro-nano structure, an embossing template and an anti-counterfeiting product.

[0018] The specific implementation method of the photolithography technology is as follows: evenly apply photoresist on the substrate, align the coordinate origin of the direct-write image with the preset position on the substrate, and set it in a preset direction, perform direct-write photolithography in the preset blank area, and form a second photolithography area embedded in the first photolithography area. The cross section of the structure formed by the direct-write photolithography unit in the second photolithography area is a right triangle, so that the cross section of the second photolithography area is serrated as a whole, so that the second photolithography area presents a platinum effect. The first photolithography area and the second photolithography area jointly form a micro-nano structure, and the micro-nano structure is used as an imprint template to transfer the information on it to a polycarbonate film to obtain an anti-counterfeiting product.

[0019] The method of transferring the anti-counterfeiting product onto the wine box 1 by the micro-nano transfer process is as follows: a UV curing glue is applied on the polycarbonate film to form a glue layer, an embossing template is embossed on the surface of the glue layer so that the glue layer forms a surface structure complementary to the embossing template, and the glue layer is cured by ultraviolet irradiation, thereby realizing the embossing transfer of information. In some embodiments, the embossing transfer of information can also be realized by applying a thermosetting coating on the polycarbonate film, embossing the embossing template on the surface of the coating so that the coating forms a surface structure complementary to the embossing template.

[0020] Relevant parameter design, the graphic resolution range of the grating image is less than 8000dpi, the graphic resolution of the direct writing image is 100000dpi-254000dpi, the structure width of the direct writing lithography unit is in the range of 5μm-50μm, and the structure depth is 1μm.

[0021] Step 4: Overprint the gold UV ink on the photolithography film by an offset printing machine; Step 5: Overprint the black ink background on the wine box 1 through an offset printing machine, and overprint the black ink with the gold UV ink to leak the micro-nano photolithography text background; Step 6: After coating the PET light film on the surface of the wine box 1, silk-screen snowflake ink is printed, the snowflake ink is hollowed out with micro-nano photolithography text parts, and UV light curing is performed to complete the printing of the wine box. The finished product is shown in Figure 4 ; During the reprinting process of the wine box, it is necessary to overprint the ink multiple times, such as in step four, step five and step six. Since there are errors in the overprinting process of the offset printing machine, especially when the black ink is overprinted, although a hollow position matching the security line 2 is left, the security line 2 is very thin and is extremely easy to be covered by the black ink during the overprinting process, resulting in the anti-counterfeiting font being unrecognizable. Through testing and the design of the anti-counterfeiting font in the security line 2, under the normal operation of the offset printing machine with an error of no more than 0.5 mm, it can always ensure that the security line 2 designed by the present invention has at least one column of complete anti-counterfeiting fonts that are clearly visible, and the anti-counterfeiting fonts can be seen by moving the microscope to any section of the security line 2.

[0022] Since the PET film is heated during the UV light curing process, it will have a shrinkage error after cooling. The present invention fully considers the shrinkage error and designs the anti-counterfeiting information in the anti-counterfeiting line 2 to ensure that at least one column of anti-counterfeiting fonts can always be guaranteed to be complete and clearly visible during printing.

[0023] Step 7: After lamination, conduct anti-counterfeiting inspection. Use a 150x microscope to conduct anti-counterfeiting inspection on the anti-counterfeiting line 2. If at least one column of complete anti-counterfeiting fonts can be clearly seen, it is qualified. The anti-counterfeiting effect after printing can be seen in the following table. Figure 5-Figure 8 .

[0024] The above is a detailed introduction to the micro-nano anti-counterfeiting printing method of the wine box anti-counterfeiting line provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope, and changes and improvements to the present invention will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for printing micro-nano anti-counterfeiting lines on wine boxes, characterized in that: The method steps are as follows: The first step is to typeset and design a photolithography anti-counterfeiting line on the wine box, wherein the width of the anti-counterfeiting line is 1-1.5 mm; Step 2: Design an anti-counterfeiting line and pixelate it to form a grating image, design a foreground pattern and pixelate it to form a direct-writing image, wherein the direct-writing image is composed of a plurality of direct-writing partitions of micron size and arranged in a matrix, each of which contains an anti-counterfeiting font, and the anti-counterfeiting font is composed of a plurality of direct-writing photolithography units; The third step is to use photolithography technology to make an anti-counterfeiting photolithography film for the graphic information, and transfer it to the wine box through micro-nano transfer technology; Step 4: Overprint the gold UV ink on the photolithography film by an offset printing machine; Step 5: Overprint the black ink background on the wine box through an offset printing machine, and overprint the black ink with the gold UV ink to leak the micro-nano photolithography text background; Step 6: After coating the PET light film on the surface of the wine box, silk-screen snowflake ink is printed, the snowflake ink hollows out the micro-nano photolithography text part, and UV light curing is performed to complete the printing of the wine box; Step 7. After lamination, conduct anti-counterfeiting inspection. If at least one complete column of anti-counterfeiting fonts can be clearly seen, it is qualified.

2. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 1, characterized in that: In step 1, the anti-counterfeiting line is an arc-shaped laser anti-counterfeiting line.

3. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 2, characterized in that: In step 2, the direct-write partitions have at least 7 columns, each column of direct-write partitions is arranged side by side, and each column of direct-write partitions is arranged along the length direction of the anti-counterfeiting line.

4. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 1, characterized in that: In step 2, the anti-counterfeiting fonts in the direct-writing partition of the anti-counterfeiting line are all the same, and a plurality of anti-counterfeiting lines are arranged on the upper surface of the wine box, and the anti-counterfeiting fonts in each anti-counterfeiting line are different.

5. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 1, characterized in that: In step three, the method for preparing the anti-counterfeiting product is as follows: the graphic information is obtained into a micro-nano structure through photolithography technology, and the obtained micro-nano structure is used as an imprint template to transfer the information on the micro-nano structure to a polycarbonate film to obtain the anti-counterfeiting product.

6. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 1, characterized in that: In step 4 and step 5, the offset printing position error of the offset printing machine is no more than 0.5 mm.

7. The method for printing a micro-nano anti-counterfeiting thread on a wine box according to claim 1, characterized in that: In step seven, use a 150x microscope to inspect the anti-counterfeiting thread. If at least one complete column of anti-counterfeiting fonts can be clearly seen, it is qualified.

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