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Anti-counterfeiting ink

A kind of anti-counterfeiting ink and ink technology, which is applied in the direction of ink, household utensils, applications, etc., can solve the problems of reliability and practicability limitations, and poor tolerance, etc., and achieve the effect of easy identification, good stability, and easy detection

Active Publication Date: 2015-06-17
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Several known Raman marker materials, such as the use of polydiacetylene in US005324567A, the use of azo and polycyclic chromophores in US005718754A, the use of polymers, fullerenes, etc. in US6610351B2, and the use of more in the above patents Although organic substances can be detected as Raman markers, their tolerance is often insufficient, which limits their reliability and practicability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Table 1 Anti-counterfeiting ink component content

[0052]

[0053] The components of the ink were weighed according to the content of the components listed in Table 1. The polyurethane acrylic resin used was the EBECRYL220 series of CYTEC Company, and other components were also commercially available. The weighed materials are mixed and rolled on a three-roller inking machine, and the rolling is repeated three times to make marker gravure ink. The obtained ink was proofed, and the Raman spectrum detection of the sample was carried out by using an in via microscopic confocal Raman spectrometer produced by Renishaw Company in the United Kingdom. The light source used was an argon ion laser of 514.5 nm, and the laser output power was 20 mW. The Raman spectrum shown in Figure 1(a) can be obtained, at 750cm -1 ~970cm -1 There are obvious Raman characteristic peaks in the range, which are the characteristic peaks of the marker material SiC. However, this feature does n...

Embodiment 2

[0055] Table 2 Anti-counterfeiting ink component content

[0056]

[0057] Each component of the ink is weighed according to the composition content listed in Table 2, wherein the rosin modified phenolic resin used is the rosin modified phenolic resin NP-REZ series of Hexion Company, and the polyacrylate used is the TEGO Foamex N series of EVONIK Company , other components are also commercially available. The weighed materials are mixed and rolled on a three-roller inking machine, and the rolling is repeated three times to make marker offset printing ink. Gained ink is proofed, adopt the instrument and condition used in embodiment 1 to carry out Raman spectrum detection to sample, can obtain the Raman spectrum figure as shown in Figure 1 (b), at 170cm -1 ~240cm -1 There are obvious Raman characteristic peaks in the range, which is the marker material Si 3 N 4 characteristic peaks. However, this feature does not exist in the ink spectrum without adding markers.

Embodiment 3

[0059] Table 3 Anti-counterfeiting ink component content

[0060]

[0061] The components of the ink were weighed according to the content of the components listed in Table 3. The epoxy acrylic resin used was EBECRYL860 series of CYTEC Company, and other components were also commercially available. The polyacrylate used is TEGO RAD2200N series from EVONIK Company. The weighed material is mixed and rolled on a three-roll ink padding machine, and the rolling is repeated three times to make a marker UV screen ink. Gained printing ink is proofed, adopts the instrument and condition used in embodiment 1 to carry out Raman spectrum detection to sample, can obtain two kinds of Raman spectrograms shown in Fig. 1 (c), Fig. 1 (d), respectively at 140cm -1 ~255cm -1 with 320cm -1 ~610cm -1 There are obvious Raman characteristic peaks in the range, which are respectively the marker material Mg 2 Si and Tm 2 o 3 characteristic peaks. However, this feature does not exist in the i...

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Abstract

The invention provides an anti-counterfeiting ink which comprises a Raman mark material having Raman activity. The ink can detect an obvious Raman characteristic scattering peak of a marker material under stimulation of a 514.5 nm light source. The characteristic peak has uniqueness, can be identified and marked, can be distinguished from other components in the ink, and is not interfered by other components, so that the anti-counterfeiting ink can be used for identifying the true and false of paper money and negotiable securities, and has a certain anti-counterfeiting function.

Description

technical field [0001] The invention relates to an anti-counterfeiting ink, in particular to an anti-counterfeiting ink containing Raman marking material. Background technique [0002] At present, the rapid development of Raman spectroscopy technology, especially Raman spectrometer, makes the detection of Raman active materials relatively easy, and the detection limit is also greatly improved. Therefore, Raman active materials are gradually used as special marker materials and added to inks. Marker inks are used for anti-counterfeiting of security documents. Such as patents US005324567A, US005718754A, US6610351B2, US005935755A. [0003] In general, materials with Raman activity that can be detected by instruments can be used as marker materials. However, as a material with a certain anti-counterfeiting function, it must be concealed, detectable, and identifiable, and the two are usually contradictory. In addition, the tolerance of the applied environment must be met. Sev...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/102C09D11/103
CPCC09D11/102C09D11/103C09D11/50
Inventor 韩丽琴唐士立刘卫东郭钢锋管文欧阳苏阳胡自力张鲁晶
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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