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Multi-wavelength fluorescent quantum dot anti-counterfeiting method

A technology of fluorescent quantum dots and quantum dots, applied in the field of anti-counterfeiting, can solve problems such as loss of anti-counterfeiting effect, and achieve the effect of high concealment and strong technicality

Inactive Publication Date: 2012-09-19
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the fact that the traditional anti-counterfeiting technology is also restricted by various technical factors and human factors, it gradually loses the best anti-counterfeiting effect

Method used

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  • Multi-wavelength fluorescent quantum dot anti-counterfeiting method
  • Multi-wavelength fluorescent quantum dot anti-counterfeiting method

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Embodiment Construction

[0025] The invention provides a method for anti-counterfeiting of multi-wavelength fluorescent quantum dots, comprising the following steps:

[0026] (1) Select a variety of fluorescent quantum dots with different particle sizes. The emission fluorescence spectrum of the quantum dots is evenly distributed in the near-infrared light region, and the wave bands do not overlap. The quantity is equal and corresponds to one by one;

[0027] (2) Combining with barcodes, the presence or absence of fluorescence peaks of various fluorescent quantum dots in a given band is used to encode them in each black bar;

[0028] (3) Evenly mix the quantum dots with the ink in the corresponding printer cartridge, and the concentration should be such that it can be detected normally after printing. The ink can be colored, black or colorless;

[0029] (4) Use the ink containing quantum dots in step (3) to print anti-counterfeiting markers, which can be printed on any position of the product, there...

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Abstract

The invention discloses a multi-wavelength fluorescent quantum dot anti-counterfeiting method, comprising the following steps of (1) selecting a plurality of fluorescent quantum dots with various grain diameter types, wherein the fluorescence emission spectrums of the fluorescent quantum dots are evenly distributed within a near-infrared area; moreover, no wave bands overlap; and the type of the selected quantum dots is in a number equal to that of the ink boxes of a selected printer, and further is corresponding to the ink boxes of the selected printer one to one; (2) coding a plurality of fluorescent quantum dots of various types in each black bar according to bar codes through the utilization of the presence or absence of the fluorescence peaks of the fluorescent quantum dots of various type within a given wave band; (3) evenly mixing the quantum dots with ink in the corresponding printer ink box; and (4) printing an anti-counterfeiting marker with the ink containing the quantum dots in the step (3) so as to realize the highly anti-counterfeiting of commodities. The anti-counterfeiting marker made by such an anti-counterfeiting method has the advantages of high precision, good hiddenness and large information capacity, and further can be set and assigned by a manufacturer.

Description

technical field [0001] The invention belongs to the field of anti-counterfeiting technology, and relates to a novel anti-counterfeiting method, which utilizes the characteristic that near-infrared fluorescent quantum dots can generate fluorescence after being excited to carry specific information on the outer packaging of commodities. Background technique [0002] At present, there are dozens of relatively mature anti-counterfeiting technologies, each with different principles and advantages in anti-counterfeiting effects. At present, common anti-counterfeiting technologies include network anti-counterfeiting, material anti-counterfeiting (such as paper, film anti-counterfeiting technology, etc.), ink anti-counterfeiting (such as heat-sensitive anti-counterfeiting ink, photosensitive anti-counterfeiting ink, etc.), physical anti-counterfeiting (such as using light refraction, anti-counterfeiting technology of electromagnetic technology, etc.) etc.), printing anti-counterfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M3/14
Inventor 刘玉冰钱志余崔奉良高凡张宗嘉韩盟盟
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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