... Nickel-free.-----------------------------------------------------------------------------------Description of Process: Material:Copper,Brass,Iron,Zinc Alloy,Pewter,Stainless ... Gold,Silver,Antique Silver,Misty Silver,Copper,Antique Copper,Nickel,Black Nickel,Misty Nickel, ... Photo Etching.LOGO:Soft enamel,Silk screen printing,Offset printing,Engraved,Embossed,Debossed ... logo silk-screen logo engraving logo