Steel Blackening

Performance: This product is an odorless, clear liquid blue, steel, copper, zinc alloy metal with fast action black, black process at ambient temperature, without heating, easy to use. Black metal parts after the FDA black shiny, firm does not fade, both beautiful and rust-proof, in fact, a good helper hardware and lighting industries. Usage: first need blackened metal degreasing rust treatment, rinse hair after it into the black liquor 10-2 seconds, remove the black when the surface of the device, placed in the air for 5 minutes and then wash with tap water. Then put a metal passivation solution soak for 5 minutes, remove dry. Note: 1. blackening process not too long, just turn black to the surface can be, not only easy to swap black long black hair black liquor and easy to fail. Blackening if precipitated residue filtered out only after storage, so as not to fail the next time. 2. If you need another copper stained green copper, the latter black without passivation directly into the greenish liquid immersion can be.