What is overprinting? What are the reasons for overprinting?
Time:2024-07-10
Views:256
Overprinting is the short form of color printing, refers to the time of printing, the first on a plate printed on a color, and then the paper overlay on another plate, so that the plate frame completely and precisely coincide with each other, and then printed on another color, a two-color color overprinted printed matter on the completion of the.
If you want to set a variety of colors, according to this approach to more overprinting several times, but the more colors, the more trouble printing, so you need to be extremely skilled. But so with a variety of colors overprinted things, the color can be varied, very nice! This method of overprinting was actually invented in the Yuan Dynasty in the fourteenth century AD.
A. Plate Problems
Plate mounting instability: the plate is not aligned when it is mounted in the press, resulting in displacement during printing.
B. Calibration Problems
Improper calibration of the printing press: The cylinder, plate or blanket of the printing press is not properly calibrated, resulting in inaccurate alignment during printing.
C. Paper Problems
Paper deformation: paper deformation in the printing process due to moisture changes, temperature or pressure and other reasons, affecting overprint accuracy.
D. Color difference problem
Color difference: different colors of ink drying speed is different, resulting in changes in the location of the color area when printing
E. Paper transfer problem
Improper paper transfer: paper in the transfer process due to the inclusion of foreign objects or mechanical wear and tear caused by size changes or displacement.
F. Equipment Problems
Wear and tear of equipment: Wear and tear of printing machine parts or loosening of adjustment screws, resulting in changes in the gap between printing parts.
G.Software Problems
Software problems: Incorrect settings of the typesetting software or incorrect parameters at output, resulting in improper processing of graphic information before printing.
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