Printing method of color image for anti-counterfeiting

Abstract

The invention discloses a printing method of a color image for anti-counterfeiting. The printing method comprises the following steps of obtaining original color image information including digital ink color information which is forme by obtaining an original color image and processing the original color image, processing the digital ink color information to form a color code, performing gamut color separation processing on the original color image, performing gray balance processing on the original color image, performing nonlinear ink compensation processing on the original color image, and selecting an anticounterfeiting ink to print the previously processed color image to obtain the desired color image for anti-counterfeiting. The printing method has the advantages that during printing, color distortion is avoided, the figure and the color of the original color image can be reproduced very clearly, and in the meantime, multiple anti-counterfeiting processing is performed on the original color image to be printed so that the anti-counterfeiting level of the printed color image can be improved, and as a result, the color image can be effectively prevented from being copied and printed.

Description

technical field [0001] The invention relates to a printing method of a color image, in particular to a printing method of a color image used for anti-counterfeiting. Background technique [0002] At the beginning of the 20th century, the printing technology marked by the application of four-color photographic color separation technology realized full-color image printing and reproduction. Since the 1970s, with the development of computer technology, four-color electronic color separation technology has gradually been applied and has been continuously improved until now. Traditional color printing generally uses C, M, Y, and K four-color inks for printing. Therefore, when printing color images, the CMYK four-color separation model is used, and four fixed primary color inks are used. Color images using four-color printing have the following defects: (1) The color gamut is small and fixed, and the reproduction loss of high-saturated colors is large, and only about 60% of the o...

AI Technical Summary

Problems solved by technology

Color images using four-color printing have the following defects: (1) The color gamut is small and fixed, and the high-saturation color reproduction loss is relatively large, and only about 60% of the original image can be reproduced; (2) The frequency modulation of the network cable is generally 175lpi, and the network cable width is generally At 142 microns, the gradation is more obvious, the color gradation distortion is larger, and the three-dimensional effect of the color is poor; (3) the anti-counterfeiting difficulty of printed products is relatively low, and many of them only use anti-counterfeiting ink printing to achieve anti-counterfeiting purposes, while the current anti-counterfeiting inks It is also easy to buy, so the printed image is very easy to be copied arbitrarily, it is difficult to distinguish the authenticity, and the corresponding anti-counterfeiting effect cannot be achieved