Method for printing on-site and transitional-layer images and texts in color-overlapped manner by gravure plate

A technique of stacking color printing and gravure plate, which is applied in the field of gravure printing machine printing and transitional level graphics and text, which can solve the problems of inability to realize transitional level graphic printing, long cycle time, and high transformation cost, so as to improve the application range and product quality. The effect of production efficiency

Inactive Publication Date: 2012-10-03
CHONGQING HONGSHENG PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The gravure printing process is to apply ink to the graphics and texts below the blank part of the printing plate, and remove the excess ink with a scraper. Under the action of printing pressure, the ink Transferred to the substrate, the gravure printed graphics and text are concave into the printing plate, and the amount of ink stored is large. The graphic and text ink layer obtained after embossing is thick, rich in layers, and the ink color is bright. The thickness of the printing ink layer is about 20 ~ 40um , gravure printing is generally used for solid graphic printing, but transitional level graphic printing cannot be achieved
At present, there are three printing methods for printing on-site plus transitional level graphics and texts: one is to directly use the unit-type sheet-fed offset printing machine to pr

Method used

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  • Method for printing on-site and transitional-layer images and texts in color-overlapped manner by gravure plate
  • Method for printing on-site and transitional-layer images and texts in color-overlapped manner by gravure plate
  • Method for printing on-site and transitional-layer images and texts in color-overlapped manner by gravure plate

Examples

Experimental program
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Embodiment 1

[0016] Example 1 , taking the printing and processing of a certain type of cigarette packaging box as an example, the main printing graphics are a large area of ​​red solid ground plus two transitional graphics in the same direction similar to the moon shape, and the dots of the transitional graphics are about 80%. That is to say, to realize the transition from 100% solid to 80% level, the following process steps are adopted:

[0017] (1) For the first printing, solid-field printing plus transition-level dot graphics, the gravure plate production method is transition from solid to bright tone, that is, 0.3 to 0.4 times the number of dots required for 100% transition from solid to bright tone graphics. The angle is a square dot, and the number of screen lines is 70 lines / cm. At the same time, it completes large-area solid graphics and texts and foreshadowing transitional dot printing. The effect is as follows: figure 1 as shown in (a);

[0018] (2) Second printing, at figur...

Embodiment 2

[0020] Example 2 , taking the printing and processing of a cigarette packaging box as an example, the main printing graphic is a large area of ​​red solid ground plus two moon-like transitional graphics in the opposite direction, and the bright tone part of the transitional graphics is still about 80%. , but to realize the level transition from 100% to 80% on the ground in two opposite directions, the rest are the same as in Example 1, and adopt the following process steps:

[0021] (1) For the first printing, solid-field printing plus transition-level dot graphics, the gravure plate production method is transition from solid to bright tone, that is, 0.3 to 0.4 times the number of dots required for 100% transition from solid to bright tone graphics. The angle is a square dot, and the number of screen lines is 70 lines / cm. At the same time, it completes large-area solid graphics and texts and foreshadowing transitional dot printing. The effect is as follows: figure 2 as show...

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Abstract

The invention provides a method for printing on-site and transitional-layer images and texts in a color-overlapped manner by a gravure plate. The method comprises the following steps: firstly printing on-site and transitional-layer dot images and texts and printing large-area on-site images and texts and basic transitional layer dots, wherein a gravure plate is made in an on-site-to-highlight transition manner, and ink cell angles are square dots; and overprinting transitional-layer dot images and texts, wherein the transitional layer dots of the gravure plate are made in a manner of highlight-to-middle tone-to-highlight transition, and ink cell angles are elongated dots. With the application of the method, a gravure press can be used for successfully printing products with on-site and transitional-layer images and texts in one time, the traditional printing manner combining gravure with offset printing is not used, and the application scope and the production efficiency of the gravure technology can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of printing processing, and in particular relates to a method for printing solid-field and transition-level graphics and texts with a gravure printing machine. Background technique [0002] The traditional printing of transitional layers of graphics and texts can only use lithographic offset printing, and gravure printing is mostly used for solid printing. [0003] The lithographic printing process is mainly offset printing. After the offset printing plate is inked, it is transferred to the substrate through the intermediate rubber cylinder. The graphic part and the blank part of the offset printing plate are almost on the same plane. The thickness of the printing ink layer is about 1 ~ 4um, which is a traditional It is a printing and processing method of transitional graphics and texts, but it is slightly less expressive to solid graphics and texts. [0004] The gravure printing process is to apply ink to ...

Claims

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Application Information

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IPC IPC(8): B41M1/10
Inventor 骆志伟
Owner CHONGQING HONGSHENG PRINTING
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