The proper detergent for washing exposed dies must be strong enough to cut through unexposed resin, but mild enough to avoid removing small characters or distorting stamp copy. You will find our liquid detergent to be just the right stuff for hand washing and our flake detergent ideally suited for use with mechanical washout machines or our PolySonic Ultrasonic Washout Units. Use 1/2 oz. packages for the A5 PolySonic, 2 oz. packages for the A4 PolySonic and 4 oz. packages for the A3 PolySonic.