The colors produced vary from brown on white metal, silver and tin/lead to purple, grey to black, and gun metal blue on copper, brass and bronze.
Insta-Blak A-385 is an aluminum-blackening process that can be used as both an immersion and a swab-on solution. It's an easy-to-use finish that requires no special equipment or procedures. One gallon of Insta-Blak A-385 can coat 150–250 sq. ft. of aluminum parts.
Insta-Blak 333 GEL is a slower-acting blackening process for steel and ferrous metals. This gel-based solution is ideal for simple swab-on vertical applications, touchups, and the user who prefers a slower blackening reaction.