Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 812 Midnight Purple (op) $0.00 Weight 1 oz (+$4.00) 8 oz (+$32.00) 16 oz (+$64.00) 1663:+:4,1666:+:32,1667:+:64 Quantity: - + Opaque, un-cataloged, Thompson Enamel for Copper, Silver, Gold, Iron and Steel. This enamel is "medium fusing" and should be fired at 1450 to 1550 degrees F. for approximately 2 to 4 minutes. All Enamel is pre-1990, 80 mesh and lead bearing.