1. Letterpress uses a convex surface for transfer printing, also known as relief. A large number of letterpress uses rotary printing machines, including newspapers, magazines and advertising flyers. This kind of printing has higher requirements on the smoothness, inking and strength of the paper, and does not allow the paper to break Wrinkling or other problems leading to the shutdown of the printing machine occur. At the same time, the paper is not allowed to lose hair, powder, blister, soluble substances and friction substances.

2、石印术（Lithograph）以平的表面传印，又称平版法（Planographic）。大多数平版法是由印版传印印刷图文到一支橡皮滚筒，再转印到承印物上，故此种印刷方式也可以称为转印（Offset），俗称柯式印刷。因为平板印刷使用的油墨相当粘，当纸张从橡皮布上剥离时，对纸张表面有很大的拉扯力而产生剥皮力（Pickingforce），故用于此种方法印刷的纸张必须清洁、无纸毛，而且表面强度要强，同时此印刷方式易破坏涂布纸的涂布层，对纸张表面的平滑度要求不高，较粗糙的纸张也能印出很好的效果。

2. Lithography, also known as planographic, uses a flat surface for printing. Most lithography is from the printing plate to a rubber cylinder, and then transferred to the substrate, so this kind of printing method can also be called offset, commonly known as offset printing. Because the ink used in plate printing is rather sticky, when the paper is peeled off from the blanket, there is a great pulling force on the surface of the paper, resulting in peeling force. Therefore, the paper used in this method must be clean, free of paper wool, and the surface strength is strong. At the same time, this printing method is easy to damage the coating layer of the coated paper, and the smoothness of the paper surface is not high, Rougher paper can also produce good results.

3、凹印术（Gravure）以凹下的表面传送油墨到承印物上，又叫凹版法（Intaglio）。凹版（Gravureplate）的显著特性是：油墨是由印版凹下部分直接加于承印物上的，印版表面是平的，只有图文部分是凹下去。此印刷方式对纸张的平滑度要求比较高。此种印刷方式在烟包印刷中使用比较普遍。

3. Gravure (gravure) to concave surface transfer ink to the substrate, also known as intaglio (intaglio). Gravure plate (gravure plate) is a remarkable feature: ink is directly added to the substrate by the concave part of the plate, the surface of the plate is flat, only the graphic part is concave. This printing method requires high smoothness of paper. This kind of printing method is widely used in cigarette package printing.

4、网印法（Screenprinting）此印刷方式主要用于艺术品的制作上

4. Screen printing is mainly used in the production of art