Home > Listing of Enamels > Opalescent EnamelClick Image To View Larger RF-1 White (opal) (NIHON) $8.50 Weight 1 oz ($8.50) 4 oz ($34.00) 8 oz ($68.00) 10607:=:8.5,10606:=:34,10608:=:68 Quantity: - + Opalscent, Nihon Shippo 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. The enamel is lead bearing