Home > Listing of Enamels > Vintage EnamelClick Image To View Larger 105 Blue Grey (op) $5.00 Weight 1 oz ($4.00) 8 ozs ($32.00) 16 ozs ($64.00) 6031:=:4,6030:=:32,6032:=:64 Quantity: - + Qpaque, 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.