Screen printing, also known as screen plate printing, is a plate-based printing technique that transfers ink onto a substrate through a mesh plate. The principle is that the mesh holes on the plate with graphic areas allow the ink to pass through, while the mesh holes in non-graphic areas are sealed, thus forming patterns on the substrate. 

This technology has the characteristics of strong printing adaptability, thick ink layer, bright colors, and strong light resistance. It can be used for printing on various flat and curved materials including paper, textiles, plastics, metals, glass, ceramics, etc.