Four-color wide-color-gamut offset printing method

Abstract

The invention belongs to the technical field of printing and relates to a four-color wide-color-gamut offset printing method. The method converts the RGB format of a picture to CMYK format through the following steps: anticipating the color gamut of the picture and determining the color gamut size of the picture; setting display parameters of a display and establishing a display property file of the display; determining a printing ICC curve as the standard ICC of picture conversion. Meanwhile, the invention substitutes pink ink for magenta ink so as to enlarge the color generation range of four-color ink as well as the color gamut of ink. According to the printing method, a printing product with wider color gamut can be manufactured and the working efficiency of four-color printing process is improved, thus satisfying the increasing customer requirement.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to a four-color wide-color gamut offset printing method. Background technique [0002] At present, in offset printing technology, four-color printing is a conventional printing technology, and four-color printing is CMYK (CMY is the initial letter of the names of three printing inks: cyan Cyan, pink Magenta, yellow Yellow, K is the last one of black Black Letters) in four-color printing. Due to the limitation of the color gamut of the four-color ink, the information of the original work that can be restored by the four-color printed matter is very limited, and the purpose of maximizing the reproduction of the color of the original manuscript cannot be achieved. [0003] In order to better reproduce the color information of the original manuscript, six-color and seven-color printing methods were subsequently adopted, and the purpose of expanding the reproduction color g...

AI Technical Summary

Problems solved by technology

If multiple printing methods are used, the four-color printing must be completed first, and then the second printing is completed to complete the printing of the remaining colors. In this way, the multi-color printing will increase the production cost and decrease the production efficiency. This printing method runs counter to the production mode of reducing production costs and improving production efficiency

[0004] The traditional four-color printing process often loses a lot of pigments in the process of converting RGB images to CMYK format. In addition, the color gamut of CMYK inks is too narrow, so that the color information that can be retained in printed works is too limited. With the continuous improvement of product quality requirements, it is obvious that the traditional four-color printing process can no longer meet customer requirements

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