Home > Listing of Enamels > Milton Bridge EnamelClick Image To View Larger L-21 Lazurite (tr) $4.25 Weight 1 oz. ($4.25) 3505:=:4.25 Quantity: - + Transparent, cataloged, England manufacturer, 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 80 mesh and lead bearing.