High saturability color printing process for natural kraft

Abstract

The invention provides a high saturability color printing process for natural kraft. The process comprises the following steps: S01, measuring chromaticity of to-be-printed natural kraft and recordinga chromaticity value; S02, adjusting color of a to-be-printed image; S03, extracting a highlight part of the image as an independent white special color plate; S04, subtracting the chromaticity valueof the natural kraft measured in the S01 to obtain the color subtracted to-be-printed image based on a color value of the to-be-printed image adjusted in the S02; S05, separating special color for the to-be-printed image obtained in the S04; S06, splicing a large plate by color separating sheets obtained in the S05 and outputting a printing plate; and S07, carrying out printing on corresponding color cells of a printer by adopting the color plates, special color printing ink and indigo, product color, yellow and black printing ink, and transferring the color printing ink to the natural kraftto finish printing. The high saturability color printing process for natural kraft has the beneficial effect of improving the reproduction effect and the color saturability of the printed image of thenatural kraft.

Description

technical field [0001] The invention relates to a printing process, in particular to a high-saturation color printing process for natural color kraft paper. Background technique [0002] Kraft paper, used as packaging material, is very strong, usually yellowish-brown in color, and semi-bleached or fully bleached kraft pulp is light brown, cream or white. It is difficult to obtain better color reproduction in kraft paper printing, especially to accurately achieve color reproduction on ordinary kraft paperboard, which is more difficult than printing on bleached kraft paperboard. Due to the interference of the color of kraft paper itself, in After each color ink is superimposed on the kraft paper, the printed color image is obviously darker and cannot show high-saturation colors. Therefore, it is necessary to study a more suitable technology for high-saturation color printing on kraft paper. Contents of the invention [0003] In order to solve the problems in the prior art, ...

AI Technical Summary

Problems solved by technology

It is difficult to obtain better color reproduction in kraft paper printing, especially to accurately achieve color reproduction on ordinary kraft paperboard, which is more difficult than printing on bleached kraft paperboard. Due to the interference of the color of kraft paper itself, in After each color ink is superimposed on kraft paper, the printed color image is obviously darker, and it cannot show high-saturation colors. Therefore, it is necessary to study the technology that is more suitable for high-saturation color printing on kraft paper.