Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 405 Purple Mulberry (tr) 20 ozs. are available! $8.00 Weight 1 oz. ($8.00) 3868:=:8 Quantity: - + Transparent, 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. *Sample has been fired over flux*