NINGBO MACEY EDUCATION PRODUCT CO.,LTD , https://www.maceytoys.com
There are four main factors that generally cause overprinting.
1Inaccurate overprinting caused by improper process operation (usually referring to the time and location of the transfer when the machine is commissioned);
(2) Inappropriate overprinting caused by mechanical equipment wear (general wear parts such as bearings, gears, bushings and other related parts, etc.):
3 material reasons (related to the texture and silk of the paper, etc.);
4 Imposition is not allowed (films before printing are not patched);
5 plate material deformation (load plate due to pull the plate too much power, resulting in deformation of the printing plate);
6 Other aspects such as changes in the temperature and humidity of the production environment caused by sudden changes in the weather cause severe deformation of the paper, causing overprinting.
What is the difference between overprinting of four-color printing machines and overprinting of single and double color printing machines?
The overprinting of single and double color machines is not allowed because the overprint and the front color have overprinting in the circumferential direction and the axial direction. The overprinting of the four-color printing machines means that the four-color printing is accurate at the time of one-off printing but the rules of the front and rear printing sheets are not correct. The position of the line is not in the same position. The specifications of the printed sheets are not uniform (circumferential and axial). That is to say, the sizes of the white borders of the graphic mouthpieces or lateral rules are different and generally not easy to find.
Four-color machine overprinting is not allowed to be different from single and double color printing
What are the main factors that cause overprint?