Method for preparing hidden image with multi-angle color-changing observation function through reverse UV (ultraviolet) process

Abstract

The invention discloses a method for preparing a multi-angle color-changing observation hidden image through a reverse UV technology, and the method comprises the following steps: S1, making a file, employing an offset printing technology to carry out the side-by-side full offset printing of multi-color lines at an inclined angle and a preset line width in a hidden image region where an observation color-changing image needing to be hidden is located; s2, a reverse UV pattern layer is prepared, wherein the reverse UV pattern layer is mainly composed of lines with the inclination angle consistent with that of the multi-color lines of the full offset printing; s3, hiding the image-text, wherein the height difference of the hidden image-text part is manufactured through a reverse UV or UV gloss oil method; the observation color-changing image needing to be hidden is heightened according to the thickness of the reverse UV image layer; the multicolor lines heightened by the reverse UV are different, so that the lines of one color or the lines of two colors are higher than the reference plane, the color superposition result is changed, and image hiding is realized. According to the invention, a better anti-counterfeiting effect is achieved at a lower printing cost.

Description

technical field [0001] The invention relates to the technical field of image hiding and anti-counterfeiting, in particular to a method for preparing a hidden image with multi-angle observation and discoloration through a reverse UV process. Background technique [0002] Counterfeit and shoddy products emerge in endlessly in the market, causing great losses to enterprises and consumers. Enterprises have begun to introduce various anti-counterfeiting technologies to protect their legitimate rights and interests. At present, the color-changing anti-counterfeiting technology at home and abroad is MVC chameleon technology, also known as rainbow ripple. Use the different heights of the corrugated paper to cover specific areas and print color lines to achieve pattern color changes. It belongs to the first-line anti-counterfeiting technology and is difficult to reproduce. It is applied to Russian currency and has not been popularized. Its disadvantages are high cost and heavy produc...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method of hiding images prepared by reverse UV technology for multi-angle observation of discoloration, by using a mature and popular reverse UV coating process to realize the effect of multi-angle observation of discoloration, and realize image hiding based on this effect It can achieve better anti-counterfeiting effect at a lower printing cost, and can solve the problems of high process cost, strict precision requirements, and environmental protection in the existing process of multi-angle observation of discoloration effect, and compared with changing dots, The number of screen lines, the present invention has higher anti-counterfeiting performance and is more difficult to imitate

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