... metals, for plating gold (24k gold, 18 k gold, and imitated gold), it not only for rapid plating, but for groove plating, hanging plating, or roll plating, it suit ... one plating layer of 0-1.5mm on the surface of metal, which forming on surface with 24 k gold, 18k gold, or imitated gold ... on the basis of it, it can also color them with gold, red, yellow, blue, black, green, gun color, purple, orange ...