... below: 1). Stamp (die struck) For this manufacturing process, we can use the following materials: brass, copper, iron, aluminum. 2). ... (Off-set print & Silk print) For this manufacturing process, we can use the materials: iron, brass, zinc alloy, aluminum, copper. ... more lustered and shiny, and feel smooth. 2). Plating --- We can plate the metal products with gold, silver, nickel, rhodium, brass, ...