Blackening

[mechanicaltooling]

What is Blackening? Is it a chemical treatment? If so what is the chemical to use and to what microns of depth the blackening can be done to the base material. What are the base materials can be blackened? What are the preparatory operations to do before the chemical treatment? Any other colouring is also possible?

Ramu

 

[limct]

MechanicalTooling,
Go visit this website for informations you want.

http://www.finishing.com/faqs/blackoxide.html

Best regards,
ct

 

[arto]

Machinery's Handbook has some old [i.e., sounds like alchemy]recipes for coloring metals.

See Birchwood Casey for production stuff [& do-it-yourself]:

http://www.birchwoodcasey.com/index_a.html

Brownell's has the stuff gunsmiths use:

http://www.brownells.com/aspx/ns/store/AdvancedSearch.aspx?c=3948

 

[CouplingKing]

We use a process called Blackfast, supplied by a company called Blackfast. I can't recall the chemistry, but it works well with steel and cast iron, although castings tend to drink it!

Try

http://www.blackfast.com

I think there are datasheets on the process there.

Hope this helps

CK