Firstly, the steel plate is coated with photosensitive coating (some have photosensitive film) to fix the pattern film on the surface of the steel plate to be etched, and then exposed by exposure equipment. The area covered by the pattern will be washed away in the later washing process. Then, the steel plate exposed in the pattern shielding area is etched with an acid solution. Generally, the depth of the pattern is controlled at 0.02 ~ 0.05 mm, and then all the photosensitive coatings are cleaned again, and the transfer steel plate is ready!