Home > Listing of Enamels > Milton Bridge Enamel > Milton Bridge OpaquesClick Image To View Larger O-138 Light Purple (op) $6.75 Weight 1 oz. ($6.75) 8 oz. ($54.00) 16 oz. ($108.00) 4160:=:6.75,4158:=:54,4159:=:108 Quantity: - + Opaque, Milton Bridge Enamel for Copper, Silver, Gold, Iron and Steel. This enamel is "medium fusing" and should be fired at 1490 to 1530 degrees F. for approximately 2 to 4 minutes. All Enamel is new stock and lead bearing.