... technic. Product deatures: Item nameSouvenir plateMaterialGold, plating gold, silver, copper, zinc alloy, alluminum alloy, antique bronze, antique ... Lapel pins, Pins, Cufflinks, Metal coins, etcPlatingPure gold, pure silver, antique copper, nickel, iron, brass, brone, aluminum, zinc alloy ... or forging.3. Deburring and polishing.4. Plated the medals. silver plated souvenir metal plate for bank