Two tone finish?

Dwight Gruber · 12-19-2012, 02:37 PM

The "plum" coloration is sometimes seen on firearms (not just Lugers) which have been salt-blued. It is the result of chemical contamination or temperature variation in the salt-blue cheical bath.

"Pluming" is not the result of wear or differential storage. Artillery Lugers were originally rust-blued, and so not subject to this phenomenon. Plum-color parts on an artillery Luger are an indication that the parts have been reblued in a salt-bluing solution.

--Dwight

12-19-2012, 02:37 PM	#7
Dwight Gruber User Join Date: Jun 2002 Location: Portland, Oregon Posts: 3,908 Thanks: 0 Thanked 1,330 Times in 435 Posts	The "plum" coloration is sometimes seen on firearms (not just Lugers) which have been salt-blued. It is the result of chemical contamination or temperature variation in the salt-blue cheical bath. "Pluming" is not the result of wear or differential storage. Artillery Lugers were originally rust-blued, and so not subject to this phenomenon. Plum-color parts on an artillery Luger are an indication that the parts have been reblued in a salt-bluing solution. --Dwight