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Anti-counterfeit ink composition and application thereof that can be used for forensic identification

A technology of anti-counterfeiting ink and forensic identification, which is applied in the field of anti-counterfeiting inks containing Raman spectral characteristic materials and/or ultraviolet fluorescent characteristic materials, which can solve the problems of difficulty in meeting the requirements of machine-readability, poor physical and chemical resistance of anti-counterfeiting inks, and disappearance of anti-counterfeiting functions, etc. question

Active Publication Date: 2017-05-31
CHINA BANKNOTE INK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Most of the fluorescent components in anti-counterfeiting inks that emit red light under 254nm ultraviolet light are organic light-emitting materials. In addition, the light-emitting life of this type of anti-counterfeiting ink is at the level of nanoseconds, which cannot be adapted to machine-readable anti-counterfeiting, and it is difficult to meet the machine-readable performance requirements of money counters and other equipment for printed products.
There are few types of inorganic light-emitting materials with the ability to emit red light under the irradiation of 254nm ultraviolet light, and the price is high. Most of the light-emitting life is not suitable for machine-readable anti-counterfeiting. This type of ink has a fixed fluorescence emission peak, and it is impossible to adjust the composition of the material. Ratio, forming different spectral properties, that is, no coding performance, such as the patent "transparent nano-fluorescent material composition and its application in invisible anti-counterfeiting products" (patent number CN200910194814.2) of Nanjing Xiguang Optoelectronics Technology Co., Ltd.

Method used

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  • Anti-counterfeit ink composition and application thereof that can be used for forensic identification
  • Anti-counterfeit ink composition and application thereof that can be used for forensic identification
  • Anti-counterfeit ink composition and application thereof that can be used for forensic identification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Eu 0.04 Y 0.96 V 0.3 P 0.7 o 4 The firing:

[0053] Raw material mass percentage:

[0054]

[0055] Put the above materials into a crucible, place in a high-temperature resistance furnace, raise the temperature to 1200°C, and keep it warm for 2 hours. After the product is cooled, use a pulverizer to pulverize the product to obtain UV fluorescent characteristic material 1.

[0056] The anti-counterfeiting ink composition used for forensic identification is offset printing ink, percentage by weight:

[0057]

[0058] Preparation:

[0059] Put the above-mentioned ink raw materials into a container, use a stirring device to stir evenly to a paste dispersion, and use an ink pad to roll the dispersion to obtain an ultraviolet fluorescent offset printing ink. The anti-counterfeiting ink composition can be used as offset printing or embossing ink, and it can be directly printed on the substrate according to the normal printing process.

[0060] The printed product...

Embodiment 2

[0062] Raman Spectroscopy Offset Inks:

[0063] Preparation of SERS material 1:

[0064] Use a syringe to inject 2 milliliters of trisodium citrate aqueous solution (1wt%) in the chloroauric acid aqueous solution (0.01wt%) of 300 milliliters of boiling, under magnetic stirring, this solution has yellow and becomes wine red gradually. Add isothiocyanatopropyltrimethoxysilane and pyridine dropwise to this solution so that the concentrations are 3×10 -7 M and 8×10 -8 M, after stirring for 5 minutes, add 30 milliliters of sodium silicate aqueous solution (0.5wt%), use ammonia water to adjust the pH value to 10, stir overnight, and centrifuge the resulting precipitate to obtain SERS material 1.

[0065] Ink weight percent:

[0066]

[0067] Put the above-mentioned ink raw materials into a container, use a stirring device to stir evenly to a paste-like dispersion, and use an ink pad to roll the dispersion to obtain a Raman spectrum offset printing ink. The anti-counterfeiting...

Embodiment 3

[0069] Preparation of SERS material 2:

[0070] According to the preparation scheme of SERS material 1, isothiocyanatopropyl trimethoxy silicon and pyridine were replaced with aminopropyl trimethoxy silicon and isothiocyanate, respectively, to prepare SERS material 2.

[0071] The ultraviolet fluorescent characteristic material 1 and SERS material 2 in embodiment 1 are configured anti-counterfeiting ink composition according to the following ratio:

[0072] Weight percent:

[0073]

[0074]

[0075] Put the above-mentioned ink raw materials into a container, use a stirring device to stir evenly to a paste-like dispersion, and use an ink pad to roll the dispersion to obtain an anti-counterfeit ink composition that can be used for forensic identification. The anti-counterfeiting ink composition can be used as offset printing or embossing ink, and it can be directly printed on the substrate according to the normal printing process. The combination of Raman spectral materi...

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Abstract

The invention provides an anti-counterfeit ink composition for judicial expertise and application of the anti-counterfeit ink composition. The anti-counterfeit ink composition comprises the following components in percentage by weight: 0.01-99% of materials with optical characteristics, 1-95% of link material, 0-30% of pigment and 0-70% of an auxiliary. Compared with the existing anti-counterfeit ink, the anti-counterfeit ink composition disclosed by the invention has the advantages that anti-counterfeit characteristics need to be read through a specific instrument and specific equipment and are used for the judicial expertise. Through the combination of different Raman spectrum materials and / or the combination of different ultraviolet fluorescence characteristic materials, a unique signal of the ink can be formed, and an anti-counterfeit coding effect is achieved.

Description

technical field [0001] The present invention relates to an anti-counterfeiting ink composition, more specifically, the present invention relates to an anti-counterfeiting ink comprising Raman spectrum characteristic material and / or ultraviolet fluorescent characteristic material. Background technique [0002] With the development of science and technology and the improvement of living standards, people have higher requirements for product quality. Improving anti-counterfeiting technology is an effective means to prevent counterfeit securities and counterfeit products from flooding. [0003] Surface-enhanced Raman spectroscopy (SERS) is a surface-selective enhancement effect, which belongs to a high-sensitivity Raman scattering detection technology. The phenomenon of SERS is that when a molecule is adsorbed on the surface of a certain material, its scattering cross section is several orders of magnitude larger than when it is not adsorbed. For example, when a pyridine molecu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/50
CPCC09D11/50
Inventor 邵光胜张妤张世范雷文骅袁国林任志勇
Owner CHINA BANKNOTE INK
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