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High saturability color printing process for natural kraft

A technology for color printing and kraft paper, applied in printing, printing devices, etc., can solve the problems of inability to present high-saturation colors, dark color images, difficulties, etc., to improve the reproduction effect, the process is simple, and the color saturation is improved. degree of effect

Active Publication Date: 2020-02-04
DONGGUAN MYS ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] For warm-colored and darker-colored printed images without a white background, when using the high-saturation color printing process of natural color kraft paper of the present invention, the following steps are specifically included:

[0042] S01. Use a spectrophotometer to measure the chromaticity of the natural color kraft paper to be printed and record the chromaticity value;

[0043] S02. Perform color adjustment on the image to be printed in the image processing software, and appropriately increase the color saturation of the image to be printed;

[0044] S03, extracting the highlight part of the image obtained after increasing the color saturation in step S02, as a separate white spot color version;

[0045] S04. On the basis of the adjusted color value of the image to be printed in step S02, subtract the chromaticity value of the natural color kraft paper measured in step S01 to obtain the image to be printed after color reduction;

[0046] S05, performing colo...

Embodiment 2

[0058] For the cool tone printing image with white background, when adopting the natural color kraft paper high-saturation color printing process of the present invention, specifically comprise the following steps:

[0059] S01. Use a spectrophotometer to measure the chromaticity of the natural color kraft paper to be printed and record the chromaticity value;

[0060] S02. Perform color adjustment on the image to be printed in the image processing software, and appropriately increase the color saturation of the image to be printed;

[0061] S03, extracting the highlight part of the image obtained after increasing the color saturation in step S02, as a separate white spot color version;

[0062] S04, performing spot color separation on the image to be printed obtained in step S02, extracting one or more spot colors from the image to be printed according to the main color of the image, and deploying corresponding spot color inks according to the obtained spot color values, and ...

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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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M1/26B41M1/18
CPCB41M1/26B41M1/18
Inventor 陈利科钟云飞莫小丽高海萍黄思敏
Owner DONGGUAN MYS ENVIRONMENTAL PROTECTION TECH
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