Home > Listing of Enamels > Milton Bridge EnamelClick Image To View Larger T-7 Arctic (op) 120 Mesh (finer than standard) $7.50 Weight 1 oz. ($7.50) 10382:=:7.5 Quantity: - + Opaque, Blythe 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. Enamel is 120 mesh and lead bearing.