Screen printing is not only suitable for general paper printing, but also very wide adaptability. For example: ceramics, glass, printed circuit board, etc. According to the texture of the substrate, printing is not the same, although there is an inseparable interconnection between the series, but because of the substrate material (namely chemical and physical properties are different), they have their own particularity. Therefore, people are usually divided into several categories according to the substrate: paper type printing, plastic type printing, ceramic type printing, glass type printing, circuit board printing, metal type printing and textile type printing. In this way, a relatively independent printing system is formed.