Natural color kraft paper high saturation color printing process
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A color printing, kraft paper technology, applied in printing, printing devices and other directions, can solve the problems of colors that cannot show high saturation, difficulty, dark color images, etc., to improve reproduction effect, improve color saturation, process process simple effect
Active Publication Date: 2022-06-28
DONGGUAN MYS ENVIRONMENTAL PROTECTION TECH
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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.
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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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 cold-tone printed image with a white background, when using the high-saturation color printing process of the natural kraft paper of the present invention, the following steps are specifically included:
[0059] S01, use a spectrophotometer to measure the chromaticity of the uncolored kraft paper to be printed and record the chromaticity value;
[0060] S02, adjust the color of the image to be printed in the image processing software, and appropriately improve 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, perform spot color separation on the image to be printed obtained in step S02, extract one or more spot colors from the image to be printed according to the main color of the image, and allocate corresponding spot color inks according to the obtained spot color value, and then Color separa...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract
The invention provides a high-saturation color printing process of natural color kraft paper, comprising the following steps: S01, measuring the chromaticity of the natural color kraft paper to be printed and recording the chromaticity value; S02, performing color adjustment on the image to be printed; S03, adjusting the highlight part of the image Extract as a separate white spot color plate; S04, on the basis of the color value of the image to be printed after adjustment 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 Image; S05, performing spot color separation on the image to be printed obtained in step S04; S06, making a large version of each color separation sheet obtained in step S05, and outputting a printing plate; S07, using printing plates of various colors and spot color inks and The cyan, magenta, yellow and black inks are printed on the corresponding color groups of the printing machine, and the inks of each color are transferred to the natural color kraft paper to complete the printing. The invention has the beneficial effects of improving the reproduction effect and color saturation of the printed image of natural-color cowhide.
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
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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