... all metals of stainless stain, titanium board, gold, silver,copper, iron, stannum etc, it ' s a new technology ... machine, metal scutcheon machine, metal color machine, Plating machine, copper(steel)print machine, electrophoresis machine, Electric brush machine, embossed ... as one of electrotyping machine: It can be electroformed of nickel, copper, iron, chromium, tin, zinc, 24k gold, pure silver, ...