Varnishing on tin plated sheet is the last process of spte tinplate printing. The function of varnish is to protect the printed pattern, prevent mechanical damage, and at the same time give the printed tin metal sheet surface gloss and increase its aesthetics.
According to the different drying conditions, the tin plated sheet varnish can be divided into high temperature varnish and low temperature varnish. High temperature spte tinplate varnish refers to the tin plated sheet varnish whose drying temperature is above 150 ℃ during the glazing process, such as varnish prepared with epoxy resin, uric acid resin, vinyl resin, etc.; low temperature tin plated sheet varnish refers to the tin metal sheet varnish in the glazing process. , Varnishes whose drying temperature is below 150℃, such as aminoalkyd varnishes, etc.