In addition to selecting the appropriate printing medium (paper) and ink, the final effect of the printed matter still needs to be completed by appropriate printing methods. There are many types of printing, different methods, different operations, and different costs and effects. The printing methods currently in use are mainly Paper.

When many customers print pictures, promotional leaflets and other printed materials, in order to reduce the occurrence of error rates and reduce the production of color, printing companies often require customers to proof in advance, so why should proof?