Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 856 Raisin(opal) (TE) $0.00 Weight 1 oz (+$2.00) 8 oz (+$16.00) 16 oz (+$32.00) 1975:+:2,1977:+:16,1978:+:32 Quantity: - + Opalscent, 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.