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Johnny Peppers · 02-23-2001, 06:57 PM

Colt used cyanide in the heat treatment of it's pre WWII magazines. The magazines were originally heat treated prior to being blued, but the heat of the blueing removed the proper temper. The magazines had approximately the top 1" or so immersed in a 1450 degree cyanide solution and then quenched in oil to retemper them. This removed the blue and left the re-tempered part of the magazines bright.

02-23-2001, 06:57 PM	#13
Johnny Peppers User Join Date: Jun 2002 Location: Calion, Arkansas Posts: 1,042 Thanks: 0 Thanked 1 Time in 1 Post	Re: Off Topic Restoration Colt used cyanide in the heat treatment of it's pre WWII magazines. The magazines were originally heat treated prior to being blued, but the heat of the blueing removed the proper temper. The magazines had approximately the top 1" or so immersed in a 1450 degree cyanide solution and then quenched in oil to retemper them. This removed the blue and left the re-tempered part of the magazines bright.