Colorful picture six color separation printing method

Abstract

The present invention provides a six-color separation printing method of a color chart, effectively resolving the problems that the color of the prints is not bright and full, and each color version is easy to generate bumping net phenomenon under the prior equipment and technical condition, the technical solution includes following steps: the manuscript is scanned to a digital image of red, green and blue mode, changed to a digital image of CIELAB color mode after the color space conversion, divided into a six-color separation version data of yellow, magenta, cyan, black, orange and green by an algorithm of six-color separation, the data is outputted to a screening film by amplitude modulation and screening of a camera after explained of a raster image processor, burnt to a printing plate by a copyboard, printing by a printer, or outputted by amplitude modulation and screening of a direct platemaker, the prints is printed by the printer, the invention greatly improves the quality of the prints, the prints have bright and full color, each color version does not produce bumping net phenomenon, especially for printing high exquisite articles.

Description

1. Technical field [0001] The invention relates to a printing method, in particular to a six-color separation printing method for a color image. 2. Background technology [0002] For a long time, color printing has been using yellow, magenta, cyan, and black four-color printing, but the defect of this printing technology is that it does not perform well for brightly colored printed matter, and there is a considerable gap between the color of printed matter and photos. With the further increase in demand, the printing volume of high-end boutique jobs is increasing, and it is not enough to use only four-color printing. Multi-color printing and color separation printing technology have emerged as the times require. [0003] In the period of photographic color separation plate making, due to the limitation of analog color separation technology, multi-color color separation could not be realized at that time; in the period of electric extension machine color separation plate maki...

AI Technical Summary

Problems solved by technology

[0005] In view of the above situation, the purpose of the present invention is to provide a six-color color separation printing method for color pictures, which can effectively solve the problem that the printed matter is not bright and full, and each color plate is prone to collide with the screen under the existing equipment and technical conditions. The technical solution is to scan the original into a digital image in red, green and blue (RGB, the same below) color mode (if it is already in RGB color mode, no need to scan again), and then convert it into CIELAB color mode through color space conversion The digital image of the digital image is decomposed into yellow, magenta, cyan, black, orange and green six-color color separation plate data by using the six-color separation algorithm. The amplitude modulation screen of the machine is output into a screen film, and then the printing plate is made into a printing plate by a printing machine, and printed by a printing machine, or the amplitude modulation screen output of a direct plate-making machine is directly made into a plate, and printed by a printing machine into a printed matter

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