Novel secure file

A security document, a new type of technology, applied in the field of anti-counterfeiting, can solve the problems of high cost, and achieve the effect of strong concealment, obvious anti-counterfeiting identification effect, and better concealment

Active Publication Date: 2012-12-05
SHANGHAI BANKNOTE PRINTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

Experimental program
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Embodiment 1

[0014] Preparation of infrared up-conversion white light material A: 65 parts of Y(NO 3 ) 3 , 3 parts of Yb(NO 3 ) 3 , 5 parts of Er(NO 3 ) 3 , 2 copies of Ho(NO 3 ) 3 and 3 parts of Tm(NO 3 ) 3 Mix and add to 300mL water and stir to mix well. Then, at 50°C, add NH4F to the above rare earth solution, heat to 80°C, stir and sink for 2 hours, centrifuge and wash the precipitated product, take out the solid product, put it in an oven for drying, take it out, and pulverize it. After crushing, add 0.2 parts of NaF, 0.01 parts of LiCl, and 0.01 parts of KF and mix them thoroughly in a dry mill, then transfer the product to a nitrogen furnace for roasting, heat up to 550 °C at 5 °C / min, and keep it for 5 hours to obtain infrared up-conversion white light Material A.

Embodiment 2

[0016] Preparation of infrared up-conversion white light material B: Weigh 100 parts of Y 2 o 3 , 6 copies of PR 2 o 3 ,2 Er 2 o 3 , 4 points of Tm 2 o 3 and 120 parts of MgF 2 After uniform mixing by ball milling process, sintering at 1100°C for 2 hours under the protective condition of sulfur atmosphere, and then crushing by airflow to an average particle size of less than 10 microns to obtain infrared up-conversion white light material B.

Embodiment 3

[0018] A kind of infrared up-conversion white light embossing printing ink (below are weight parts)

[0019]

[0020]

[0021] Relief printing inks were prepared by conventional ink manufacturing processes according to the above formulations.

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Abstract

The invention discloses a novel secure file, which comprises two layers or three layers of patterns. When the secure file comprises two layers of patterns, the bottom layer is subjected to offset printing, and the surface layer is subjected to letterpress printing; the bottom layer of the secure file gives out monochromatic light with the same color as that of the bottom layer under the excitation of infrared laser, while the surface layer gives out light visible to human eyes under the excitation of the infrared laser. When the secure file comprises three layers of patterns, both the bottom layer and the surface layer are subjected to offset printing, and the middle layer is subjected to letterpress printing; and the bottom layer or the surface layer of the secure file gives out monochromatic light with the same color as that of the bottom layer or the surface layer correspondingly under the excitation of the infrared laser. The novel secure file implements an infrared up-conversion fluorescent material by combining the offset printing and letterpress printing ways with the light-emitting characteristics of infrared up-conversion composite white light, gives out two kinds of different visible lights recognizable by human eyes under the excitation of the infrared light, and is difficult to imitate, strongly elusive and easy to distinguish anti-counterfeiting effects.

Description

technical field [0001] The invention relates to the technical field of anti-counterfeiting, in particular to a novel security document. Background technique [0002] The Chinese patent CN102205761A published in 2011 relates to a security document with optical response characteristics, the security document contains a combination of one or more rare earth compounds anti-counterfeiting materials, the security document can emit infrared light after being excited by ultraviolet light, It also discloses a method for detecting whether the anti-counterfeit feature exists in the file. The invention has the characteristics of strong anti-counterfeiting and concealment, but the anti-counterfeiting feature requires a specific detection instrument for identification. [0003] The Chinese patent CN101678696A, which was applied by German Federal Printing Co., Ltd. in 2008 and published in 2011, relates to a security document and / or a value document with a security element, and the securi...

Claims

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Application Information

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IPC IPC(8): B42D15/00B42D15/10B42D25/382
Inventor 吴旺宝郭界花颖刘科吴亚复陆泰伟
Owner SHANGHAI BANKNOTE PRINTING
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