Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 741 Cream (op) 16ozs. are available! $6.00 Weight 1 oz ($6.00) 8 oz ($48.00) 2946:=:6,7913:=:48 Quantity: - + Opaque, 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.