Relief printing

The graphic part of the printing plate is raised, which is obviously higher than the blank part. The printing principle is similar to the seal. The early block printing, movable type printing and later type printing are all letterpress printing

Intaglio printing

The graphic part of the plate is lower than the blank part, which is often used in the printing of banknotes, stamps and other securities

Lithographic printing

The text part of the printing plate and the blank part are almost in the same plane, and the principle of oil and water are not miscible

Hole printing

The graphic part of the printing plate is a hole, and the ink is transferred to the surface of the substrate through the hole. The common hole plate printing is a hollow version and a screen version