Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 674 Red Ruby (tr) Limited Availability $12.00 Weight 1 oz. ($12.00) 3128:=:12 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 Blythe C-10 flux*