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What are the main factors that cause overprinting? The overprinting is not allowed. There are generally four main factors: 1 improper operation of the process causes inaccurate overprinting (generally refers to the handover time and location when the machine is commissioned);
2 Mechanical equipment wear causes inaccurate overprinting (general wear parts such as bearings, gears, bushings and other related parts, etc.):
3 material reasons (related to the texture of the paper and silk);
4 imposition is not allowed (the film patch before printing is not correct);
5 plate material deformation (the plate is deformed due to the excessive force of the plate when loading);
6 Other aspects, such as sudden changes in temperature and humidity caused by sudden changes in the weather caused severe deformation of the paper, causing overprinting.
What is the difference between the printing of the four-color machine and the overprinting of the single and two-color machine?
The single and double color machine overprinting is not allowed to have the circumferential and axial overprinting of the back color and the front color; and the imprinting of the four color machine means that the four colors are printed once and accurately, but the rules of the front and back sheets are printed. The position of the line is not in the same position, and the specifications of the printed sheet are not uniform (circumferential and axial), that is, the size of the white edge at the bite or side gauge of the graphic is different, and it is generally not easy to find.
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