Metal etching post-treatment

After etching, the silk screen ink must be removed. General acid resistant ink is easily soluble in alkali. Immerse the etching plate in a sodium hydroxide solution of 40-60g/L at a temperature of 50-80 ℃ for a few minutes to remove the ink. After removal, if high brightness is required, it can be polished and then dyed. After dyeing, to prevent discoloration and increase wear and corrosion resistance, transparent gloss paint can be sprayed. For some metals that have good corrosion resistance and do not stain, transparent paint may not be applied, depending on actual needs.