Types of printing: According to the relative position of the graphic and non-graphic areas on the printing plate, the printing methods are classified, including relief printing, gravure printing, offset printing, and stencil printing.

According to the paper feeding mode of the printing press, the printing methods can be classified into two types: flat paper printing and web printing.

According to whether the printing plate is in contact with the substrate, the printing method is classified, there are two kinds of direct printing and indirect printing.

According to whether the printing plate uses the printing plate to classify the printing method, there are two kinds of printing and non-plate printing.

According to the printing principle, the printing methods are classified, which can be divided into physical printing and chemical printing.