Metal staining

[checonbill]

Hi
I am looking for an inexpensive way to stain copper and brass for an in process operation that would be rolled down in a future process but able to keep the staining for later inpection. Thanks for any ideas

 

[unclesyd]

Need a little more information as to what the end results should look like, green, green and brown, red, etc?

 

[checonbill]

Hi
I am looking for a blue to black color on the material.

 

[unclesyd]

Blue isn't a normal color that is associated with copper. Here is a blue-black, Blue-Black C-44, from SSS chemical. If you want a black you could try SSS or Hubbard chemicals Blacking chemicals. If you need a true blue you may have to go to an enameling process.

http://www.ssschemical.com/page_4.html

http://www.hubbardhall.com/hbhall/pages/metalchild.jsp?id=68&gclid=CK_wqP3ly5ACFReQGgodnmdsV

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http://www.enameling.com/Catalog 2007.pdf