1. Bright chrome: bright like a mirror; 2. Sub-chrome: matt; 3. Electrophoresis: black, with brightness, under the action of external DC, the charged particles move in the direction of the dispersed medium to the cathode or anode to promote the separation of substances; Phosphating: black, but the gloss is dark, the substance is immersed in the phosphating solution, and deposited on the surface to form a layer of water-insoluble crystalline phosphorus, which is a process of hydrochloric acid conversion. 5. Gray Nickel: It is a brand new surface treatment method with strong anti-rust ability and will increase the service life of the product. 6. Others are black, nickel-iron alloy, pearl nickel, black nickel and titanium plating.
Testing requirements
1. No rust, burrs, cracks and spots; 2. The yoke is symmetrical, and the laser lettering should be clear; 3. The hardness should meet the specified standards, and the card position should be accurate. The turbine of the adjustable wrench should be flexible and the pin should not be loose.
