The importance of printing pressure

People often say that "without pressure, there is no printing", which fully explains the importance of printing pressure. Since the pressure of printing is so important, is the pressure greater? Of course not. In general, the appropriateness of printing pressure is often manifested by the print quality of printed products. The printing pressure should be based on the premise that the printed products have strong dots, clear graphics, bright colors, and adequate shades, and the smaller the application, the better.

During the entire offset printing process, it is the process of resolving the conflict between the ink and the substrate. To transfer the graphic on the plate with the ink smoothly to the substrate to be printed, it must be transferred during the graphic transfer process. Apply a certain amount of printing pressure.

When printing pressure is too small it will cause:

1. The transfer of printing graphics is not complete;

2. The network is not strong and the color is gray;

3, imprinting is not firmly fixed, the picture is made false;

4. Make original defects such as printing plates, packing linings, and iron printing machines more obvious.

Therefore, the ideal printing pressure should be: under the condition that the printing area is deformed, the minimum pressure is uniformly used on the basis that the printing is sufficiently strong. The printing pressure is appropriate and the imprinting can be firm. Printing pressure is too large or too small is not conducive to print quality, and it is a great harm to the correct transmission of the print.

The ideal printing pressure is not a fixed concept, but is based on a variety of objective printing conditions, which is conducive to the quality of the product, adjusted and adapted appropriately. In practice, the ideal pressure is generally controlled at 0.15mm-0.25. About mm, and the pressure between the impression cylinder and the blanket cylinder is greater than the pressure between the plate cylinder and the blanket cylinder by about 0.5 mm to 0.10 mm.