Adjusting Ink Color by Adjusting Embossing Pressure

In the letterpress printing process, the following factors are closely related to the quality of the printed ink. Correctly understanding and understanding the relationship between these factors and ink color is of great significance for accurately controlling the quality of printed ink.

Correctly adjust printing pressure

1. The base technology of the good printing plate bottom pad is the traditional bottom pad material of the embossing process, but its stability is poor, and the ink color variation during the printing process is large. If it is used to print a large-format plate product, the ink color is prone to appear. Flowering, lightening, it is only suitable for printing small format products. When printing a large-size map version including a field version, it is preferable to use a magnetic version of a cast iron plate (base pad) or other metal structure plate holder.

2. The good printing plate liner lining process technology gasket material should be selected from the material with small compression deformation coefficient and good elasticity, so as to avoid the uniform and full transfer of the ink due to the sagging after the embossing of the package liner can not be restored to the original state. In general, when the surface of the substrate is relatively smooth, the printed text version and cable screen version should use a neutral and hard lining, and when the printing surface is rough, suitable soft and flexible lining should be adopted. In order to prevent poor contact between the rough paper surface and the layout, resulting in ink color, lightening, lightening and other ills. In addition, during the printing process, it should be noted whether the lining is overprinted due to too many stampings and there are depressions that affect the stability of the pressure. At this time, measures should be taken to supplement or replace the lining in order to ensure uniform ink color. However, for high-precision overprint products, the lining must not be changed during the printing process, and the blind lining thickness must not be blindly increased to eliminate the phenomenon of imprinting.