1. Bright chrome: the same as the mirror light; 2. Cr: matte; 3. Electrophoresis: black, with brightness, under the action of external DC, the charged particles in the decentralized dielectric force to the cathode or anode to do directional movement, to promote the separation of substances; 4. Phosphating: black, but dark, the material immersed in the phosphating solution, deposited on the surface to form a layer of water-insoluble crystalline phosphorus, hydrochloric acid conversion process. 5. Gray nickel: is a new way of surface treatment, rust-proof ability, and will increase the useful life of the product. 6. There are other black, nickel-iron alloy, pearl nickel, black nickel and titanium and other treatment
