Understand the overprinting sequence of the offset printing process

Offset printing process with light pressure, print deformation value is relatively small, and the product is not easy to appear dirty over the bottom phenomenon, it is suitable for printing chromatogram version, lines, small text, negatives and large area layout.

The embossing process can achieve a larger amount of ink at a time, and is more suitable for printing gold, silver ink layout, field, line or text layout. According to the characteristics of printing, the ink of the offset printing process is thin, and the ink is also easy to dry, and the product does not have protrusions and does not affect the normal overprint of the stamp. The ink of the embossing process is drying slowly, which will have some negative impact on the normal color registration.

Therefore, the overprinting order of adhesive-convex-bonded products should generally be: first printing on the offset printing plate, and then printing on the embossed printing plate; printing on the small layout first, printing on the large-area layout; printing on the ink with strong hiding power, and printing after the ink with strong transparency. Printing, such as red and yellow (with white ink diluting exceptions) Overprinting black text or patterns on the layout, the black layout can be printed first, and the other colors printed afterwards. In this way, due to the transparency of the overprinting color, black can still reveal a pure black color. Color.