1.Degreasing treatment

The surface of the plastic product is stained with oil or the release agent will affect the adhesion of the ink. The surface can be cleaned and degreased by alkaline aqueous solution, surfactant, solvent cleaning and sandpaper polishing.

2. Dust removal treatment

The presence of dust affects both the adhesion of the ink on the plastic product and the effect of screen printing.

Surfactant washing can remove dust and static electricity, but there is the possibility of dust during drying.

3. Improve the printability of plastic products

Appropriate surface treatment methods should be selected according to different plastics and process requirements: such as PE, PP non-polar plastic, flame or corona treatment; polyester plastics with benzene ring, its optical activity is large, can be treated with ultraviolet light Nylon can be treated with phosphoric acid to improve the printability of plastic products.