Home > Listing of Enamels > Vintage Enamel > Thompson TransparentsClick Image To View Larger 642 Orange (tr) SOLD OUT! $0.00 Weight 1 oz. 3108:+:0 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. *This sample has been fired over Flux*