The process of "Blueing" oxidizes metal surface to a corrosion-resistant, decorative finish. 

The black ("blue") finish is produced by a chemical reaction directly with the iron (Fe) in the steel to form the black oxide of iron (Fe3O4).

Using the latest chemicals containing new concepts in activators, catalysts, penetrates, inhibitors and rectifiers. 
The result is an attractive oxide-resistant finish on steel, including low and high carbon steels, alloy steels or hardened steels.
 
The process will not flake, chip, peel, or create any dimensional change. In using the latest technology in the "Blueing" process, to create a more corrosion-resistant, abrasive-resistant, attractive deep black finish.