Pre treatment of metal etching

The process before metal etching is pre-treatment, which is a key process to ensure good adhesion between silk screen ink and metal mask. Therefore, it is necessary to thoroughly remove the oil stains and oxide film on the metal etching surface. The oil removal plan should be determined based on the oil contamination of the workpiece, and it is best to perform electrolytic oil removal before screen printing to ensure the effectiveness of oil removal. The best etching solution should also be selected according to the type of metal and the thickness of the oxide film to ensure a clean surface. Before screen printing, it needs to be dried. If there is moisture, it can also affect the adhesion of the ink, and even affect the effect of subsequent pattern etching and distortion, affecting the decorative effect.