Anyone knowledgeable of blueing acids?

Idahjo

March 05, 2004 10:52

I have been working with Plinkingtons, "American Rust Blue" and getting very fine results. It is quite expensive if one plans to do many rifles, so I researched Roy Dunlap's 1950 Gunsmithing book and found what I believe to be a similar solution called Old American Rust Blue, and am contemplating mixing a batch. Formulae call for Nitric and Hydrochloric acids, but do not mention concentration. Nitric Acid is available thru this source in 70-60-and 40%. Hydrochloric Acid is 28%. Is anyone aware of what concentrations would have been referred to in the old books?
Thanks

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  Rocklobster

  March 05, 2004 11:32

  There's a guy that goes by "Thor" in the C&R Forums :
  
  http://pub176.ezboard.com/bcurioandrelicfirearmsforum
  
  
  He restores Lugers and Mauser C96's, and uses rust-blueing methods used in the early 1900's. Can't guarantee it, but maybe he'll give you some pointers.

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  Idahjo

  March 05, 2004 12:23

  Thanks Rocklobster, I'll give it a shot.
  
  
  Just checked it out... that is another great site...[:D]

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