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Optical anti-counterfeiting mark and preparation method thereof

An optical anti-counterfeiting and marking technology, which is applied in the field of dyeing anti-counterfeiting, can solve the problems of easy loss of anti-counterfeiting function, printing anti-counterfeiting production technology is easy to be copied, and it is difficult to make anti-counterfeiting marks, so as to achieve environmental protection and healthy color rendering effect and high color saturation , Strong anti-friction ability

Inactive Publication Date: 2021-02-19
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Printing anti-counterfeiting production technology is easy to be copied, so it is easy to lose the anti-counterfeiting function, and it is difficult to make anti-counterfeiting marks on some items that are not easy to print

Method used

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  • Optical anti-counterfeiting mark and preparation method thereof
  • Optical anti-counterfeiting mark and preparation method thereof
  • Optical anti-counterfeiting mark and preparation method thereof

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0050] The invention provides a method for preparing an optical anti-counterfeit mark, comprising the following steps:

[0051] Step 1, use white silk as the substrate, cover a hollow mask on the substrate surface, the hollow mask has the pattern of the anti-counterfeiting mark prepared according to the needs, and then use the electron beam evaporation method to evaporate titanium films of different thicknesses in different regions , and according to the needs of different colors, different regions are masked at different thicknesses, so as to obtain samples with titanium thin films.

[0052] Step 2, vapor-deposit silicon thin films of different thicknesses on the sample, and cover different areas at different thicknesses according to the needs of different colors, so as to obtain an optical anti-counterfeiting mark with a Ti-Si multilayer film structure evaporated, and then Samples with optical anti-counterfeiting marks were obtained.

[0053] In the present invention, the t...

Embodiment 1

[0060] The optical mask of the Chinese face pattern that adopts in the present embodiment can be by oneself hand-cut or customize to relevant commercial company.

[0061] Figure 8 In Example 1 of the present invention, a 100nm Ti film was evaporated on white silk, and 40nm, 100nm, and 132nm (corresponding to the left face) and (40nm, 120nm, 144nm, corresponding to the right face) were respectively evaporated on ①, ②, and ③. silicon thin film.

[0062] Step 1, using white silk as a substrate, covering a hollow mask on the surface of the substrate, the hollow mask has a pattern of anti-counterfeiting marks prepared according to needs, and then adopts an electron beam evaporation method to evaporate a 100nm titanium film to obtain a Samples of titanium thin films.

[0063] Step 2: Evaporate silicon films of 40nm, 100nm, and 132nm (corresponding to the left face) (40nm, 120nm, 144nm, corresponding to the right face) on the sample, such as Figure 8 As shown, and according to t...

Embodiment 2

[0066] The optical mask with the Fudan University emblem pattern used in this embodiment can be cut by hand or customized from a relevant commercial company.

[0067] Step 1, use black silk as the substrate, put the substrate into the electron beam evaporation equipment for evaporation, first use the electron beam evaporation method to evaporate a layer of 5nm titanium film, and then evaporate a layer of 20nm on the titanium film silicon thin film, thus obtaining a sample with two thin films.

[0068] Step 2, covering the surface of the sample with an optical mask with the Fudan University emblem pattern.

[0069] Step 3: Evaporate 144nm, 180nm, 215nm, 270nm, 320nm SiO on ①②③④⑤ respectively 2 thin film, thus obtained evaporated with Ti-Si-SiO 2 The optical anti-counterfeiting mark of the multi-layer film structure, and then obtain the sample with the optical anti-counterfeiting mark.

[0070] Figure 9 In Example 2 of the present invention, a 5nm Ti film is deposited on bl...

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Abstract

The invention provides an optical anti-counterfeiting mark which comprises a substrate and a multi-layer film structure. The invention also provides a preparation method of the optical anti-counterfeiting mark, which comprises the following steps of: by taking black silk as a substrate, evaporating a titanium film on the substrate, and then evaporating a silicon film; and covering the surface witha hollow mask, plating SiO2 films with different thicknesses in different areas according to set colors, covering an area after the thickness of the area meets the requirement, continuing to evaporate the rest areas, and obtaining a sample with the optical anti-counterfeiting mark when the thickness of the SiO2 film in each area reaches a preset thickness. The invention also provides a preparation method of the optical anti-counterfeiting mark, which comprises the following steps of: by taking white silk as a substrate, covering the surface of the substrate with a hollow mask, evaporating titanium films with different thicknesses, and covering different areas at different thicknesses according to the requirements for different colors; and evaporating silicon films with different thicknesses, and covering different areas at different thicknesses according to the requirements for different colors, so as to obtain a sample with the optical anti-counterfeiting mark.

Description

technical field [0001] The invention belongs to the technical field of dyeing anti-counterfeiting, and in particular relates to an optical anti-counterfeiting mark and a preparation method thereof. Background technique [0002] The existing dyeing techniques are mainly divided into the following categories: [0003] (1) Dyeing with natural dyes [0004] Natural dyes are derived from plants, animals and minerals. Take indigo, which is widely used, as an example. This pigment is extracted from indigo (or bluegrass): add bluegrass to cellars, barrels or tanks, add lime to water, and undergo fermentation (reduction process) to form Soluble dye leucosomes are used for dyeing, and after dyeing, they are exposed to air and oxidized to the original insoluble dyes to develop color. Natural plant dyes have the advantages of non-toxic, non-polluting, high biodegradation rate, etc., but there are problems such as low brilliance, uneven hue, poor color fastness, and poor reproducibili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F7/00C23C14/30C23C14/20C23C14/10C23C14/04
CPCG09F7/00C23C14/30C23C14/20C23C14/10C23C14/042
Inventor 楚娇张亚峰石磊刘晓晗资剑
Owner FUDAN UNIV
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