Home > Listing of Enamels > Lump/Frit/Square/20 MeshClick Image To View Larger 844 Dark Orchid (op) 4 ozs. are available $0.00 WEIGHT 1 oz (+$8.00) 4475:+:8 Quantity: - + Lump form enamel, Thompson Enamel for Copper, Silver, Gold, Iron and Steel. Should be fired at 1450 to 1550 degrees F. All Enamel is pre-1990, and lead bearing.