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Dark ink with multiple security features

A functional and multiple technology, applied in the direction of ink, household utensils, applications, etc., can solve the problem of not being able to achieve infrared non-absorbing effect

Active Publication Date: 2021-04-27
CHINA BANKNOTE INK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above inks use carbon black pigments, and some use color matching black technology. Although they are dark colors, they cannot achieve good infrared non-absorbing effects.

Method used

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  • Dark ink with multiple security features
  • Dark ink with multiple security features
  • Dark ink with multiple security features

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Mass percentage:

[0036]

[0037] Process, description of results

[0038] According to the above formula ratio, put each component into the stirring device, fully stir with a butterfly paddle mixer, and roll with a three-roll mill to obtain the dark ink with multiple anti-counterfeiting functions. After printing, the front is black and the back is red, with Raman fingerprint characteristics.

[0039] Compared with ordinary black ink, the infrared reflectance curve of the ink is shown in figure 1 . Raman scattering signal characteristics see image 3 . The color density values ​​for front and back printing effects are as follows:

[0040]

Embodiment 2

[0042] Mass percentage:

[0043]

[0044] According to the above formula ratio, put each component into the stirring device, use the butterfly paddle mixer to fully stir, and use the three-roll mill to roll, and then you can get the above-mentioned dark ink with multiple anti-counterfeiting functions, black on the front and red on the back , with Raman fingerprint characteristics.

[0045] For the infrared reflectance curve of the ink, see Figure 4 . Raman scattering signal characteristics see Figure 5 . The color density values ​​for front and back printing effects are as follows:

[0046]

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PUM

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Abstract

The invention discloses a dark ink with multiple anti-counterfeiting functions, which comprises the following components by weight percentage: 5%-30% of infrared non-absorbing pigments, 0.1%-2% of Raman molecules, 20%-89% of linking materials, Oil-soluble pigment 0.1%-35%, filler 1%-35%, solvent 1%-20%, desiccant 0.05%-2%, wax 0%-10%, the ink of the present invention can meet the needs of offset printing, embossing and Engraving required for gravure printing. Using the Raman spectrometer of the Renishaw company in the UK, the Raman scattering characteristics of ink prints can be measured. The ink is dark or black on the front after printing, and red, green, blue or no color on the back. The invention has infrared non-absorption characteristics, Raman fingerprint characteristics and double-sided color development.

Description

technical field [0001] The invention relates to a dark ink with anti-counterfeit function. Background technique [0002] Patent CN104263059A discloses a penetrating number ink, and its components include stereotyped black ink, lightening agent, colloidal calcium, oil-soluble red, and kerosene. After printing, the writing on the front of the paper is black, and the writing on the back appears in bright red. [0003] This type of penetrating ink has a single anti-counterfeiting feature, because the pigments used, such as carbon black and ferrite black, have light absorption in the near-infrared band, and are not suitable for compounding with other luminescent materials. [0004] Patent CN87103261 discloses a dark ink that does not absorb near-infrared rays, using pigments such as phthalocyanine blue, permanent yellow, and Solier red for color mixing. However, due to the natural infrared absorption of phthalocyanine blue pigments, this color matching technology still has defe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/50C09D11/037C09D11/03
CPCC09D11/03C09D11/037C09D11/50
Inventor 任志勇徐莹蒋煜董勤牛牧
Owner CHINA BANKNOTE INK