The surface of the electrolytic tin plate may have defects such as scars, pits, wrinkles, dust, rust, etc. From the structure of the metal tin, there is often a very thin oil film on the surface of the metal tin. And it is generally electroplated, so the surface is relatively smooth. From the relationship between the specific surface area of the solid surface and the adsorption force, the adsorption force of electrolytic tinplate sheet is not very good.
electrolytic tinplate sheet printing is mainly offset printing, and the process is as follows:
The surface roughness of electrolytic tinplate sheet is one of the important factors affecting printing fastness. The surface of the electrolytic tin plate substrate is generally smooth. Although some organic coatings have strong adhesion on the smooth surface, the overall absorption is poor and the adhesion is small, which makes the adhesion fastness and drying performance of the coating layer and the ink layer affected