... silver,copper, iron, stannum etc, it ' s a new technology product that you make your own choice for ... many national patents, includes: Patent of practicality new type 012101210661.5, patent of outside design ... , no change color, no fall off, withstand a high temperature , and anti-organic solvent scours, ... idiozomes on the surface of metal, which forming a various of bright, gold, red, green, blue ...