PRO/Strip 2101-B is the second step of a twostep, nitric acid based tin and tin-lead stripping solution designed specifically for dual tank dip applications. PRO/Strip 2101-B is designed to remove the copper-tin intermetallic layer, not stripped by PRO/Strip 2100S Special during the first step. Additionally, PRO/Strip 2101-B will clean the copper and deposit an anti-tarnish coating, leaving a very stable, uniform, and bright finish ideal for AOI inspection.