Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 454 Yellow (op) $5.00 Weight 1 oz ($5.00) 8 oz ($40.00) 16 oz ($80.00) 1579:=:5,1582:=:40,1583:=:80 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.