A kind of encrypted printing method

Abstract

The invention discloses an encryption printing method. The encryption printing method includes the following steps anti-fake lattice point patterns are generated through a computer, positioning points are set, an offset printing PS plate is manufactured in a micro mode, and the anti-fake lattice point patterns are printed through ultraviolet colorless fluorescent ink. An anti-fake offset printing product is obtained with the method and comprises a paperboard layer, an offset printing ink layer and an ultraviolet colorless fluorescent ink layer, the paperboard layer, the offset printing ink layer and the ultraviolet colorless fluorescent ink layer are sequentially arranged in the anti-fake offset printing product from bottom to top, and the anti-fake lattice point patterns are arranged on the ultraviolet colorless fluorescent ink layer. When observed under an ordinary light source, the ultraviolet colorless fluorescent ink layer is colorless and transparent, and the patterns are not displayed; but when observed with a magnifying lens under an ultraviolet fluorescent light source, violet patterns are shown on the ultraviolet colorless fluorescent ink layer. The patterns are unique, and the patterns are clear at a glance and cannot be copied and counterfeited according to positioning marks and size, distance and distribution of true and false pattern lattice points; meanwhile, decoding sheets are not needed, the patterns are easy to recognize, and thus the anti-fake effect is greatly improved.

Description

technical field [0001] The invention relates to an encrypted printing method, in particular to an encrypted printing method using ultraviolet colorless fluorescent ink to print computer-made miniature network dot patterns. Background technique [0002] Anti-counterfeiting technology is a measure to prevent copying and counterfeiting. There are many types of existing anti-counterfeiting technologies, mainly including laser anti-counterfeiting, electronic code anti-counterfeiting, texture anti-counterfeiting labels, etc., but they all have high production costs and are easy to imitate. The ability to distinguish between true and false and other shortcomings. There is also a kind of colorless fluorescent anti-counterfeiting printing, which adopts drawing software to make plates, and then uses ultraviolet colorless fluorescent ink to print, under the irradiation of ultraviolet lamps, and uses decoding sheets to align and observe, and display specific patterns or characters to ac...

AI Technical Summary

Problems solved by technology

[0002] Anti-counterfeiting technology is a measure to prevent copying and counterfeiting. There are many types of existing anti-counterfeiting technologies, mainly including laser anti-counterfeiting, electronic code anti-counterfeiting, texture anti-counterfeiting labels, etc., but they all have high production costs and are easy to imitate. Disadvantages such as the ability to distinguish between true and false

There is also a kind of colorless fluorescent anti-counterfeiting printing, which adopts drawing software to make plates, and then uses ultraviolet colorless fluorescent ink to print, under the irradiation of ultraviolet lamps, and uses decoding sheets to align and observe, and display specific patterns or characters to achieve anti-counterfeiting functions. Its advantages It is invisible, unscannable and copyable, etc., but due to the use of decoding chips, the alignment accuracy is difficult to grasp, and the display is not ideal. At the same time, it can be copied and counterfeited in the drawing software according to the displayed pattern and text, which reduces the anti-counterfeiting effect

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