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Joined: Oct 2008
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Campfire Outfitter
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OP
Campfire Outfitter
Joined: Oct 2008
Posts: 7,821 |
This area of discoloration is on a 1976 Browning A5 light 20. It is a plumb color and is difficult to see unless the light and angle is just right. I didn't see it until a few days after I bought the gun. The gun is otherwise almost perfect. Any idea what caused this? One opinion is that it got out of the factory like that. Thanks, Ken
�Nothing is so permanent as a temporary government program." -- Milton Friedman
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Joined: Mar 2006
Posts: 3,237
Campfire Tracker
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Campfire Tracker
Joined: Mar 2006
Posts: 3,237 |
I've seen plumb coloring on several factory guns. It is usually caused by contaminated or worn out salts salts or improper temperatures. Since bluing is a micro rusting process, it often takes years to change color.
molɔ̀ːn labé skýla
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Joined: Mar 2004
Posts: 12,806
Campfire Outfitter
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Campfire Outfitter
Joined: Mar 2004
Posts: 12,806 |
Is it just an area or the whole thing?
Islam is a terrorist organization.
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Joined: Feb 2002
Posts: 32,044
Campfire 'Bwana
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Campfire 'Bwana
Joined: Feb 2002
Posts: 32,044 |
Normal aging on a bluing job over the years
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Joined: May 2005
Posts: 16,554
Campfire Ranger
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Campfire Ranger
Joined: May 2005
Posts: 16,554 |
Don't know about the instant case I've seen something like this from handling - surface rusting from hand perspiration. Oxpho Blue helped.
Kinda doubt Browning would let a bad bluing job get out. Unless of course it was blued by someone else.
The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh
Which explains a lot.
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Joined: Dec 2002
Posts: 32,220
Campfire 'Bwana
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Campfire 'Bwana
Joined: Dec 2002
Posts: 32,220 |
Older Ruger 77 actions regularly turn plum color as they age. I have been told that they do so because the receivers are cast and the metallurgy is different than a forged action.
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Joined: May 2006
Posts: 430
Campfire Member
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Campfire Member
Joined: May 2006
Posts: 430 |
Could be when it was reblued the solution got too hot.
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Joined: May 2007
Posts: 116
Campfire Member
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Campfire Member
Joined: May 2007
Posts: 116 |
My Rem700 Classic .35Whelen has turned plumb color over the years. Other guns from the same era stored in the same safe have not so I assumed that the process was faulty, allowing further oxidation to Fe2O3, a plumb colored oxide.....At the end of the day, I decided that it was simplest to like it and move on.
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Joined: Oct 2007
Posts: 948
Campfire Regular
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Campfire Regular
Joined: Oct 2007
Posts: 948 |
I get that same plum purple color on Remington 700 bolts and receivers from using Brownells Oxy 7 hot blue solution. Leaving it in the bath longer makes it darker and less noticeable but it is still purple. Mel
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Joined: Mar 2009
Posts: 1,676
Campfire Regular
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Campfire Regular
Joined: Mar 2009
Posts: 1,676 |
Metal or case hardened. Every metal alloy is different. I got guns blued at Cleveland Black Metal years ago. Every gun on earth had a book volume for the steel and salts needed with temps. Books were 4" thick so if you think you can do it with one, good luck. Purple means chrome in the steel or it was case hardened.
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Joined: Jun 2001
Posts: 32,135 Likes: 3
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2001
Posts: 32,135 Likes: 3 |
Yep. Most often different alloys. What's wrong with plum/ purple? You prejudiced or something?
The only true cost of having a dog is its death.
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Joined: Feb 2010
Posts: 17,827
Campfire Ranger
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Campfire Ranger
Joined: Feb 2010
Posts: 17,827 |
The Final Inspector in the Browning shop was a stickler about the quality of blue jobs, Browning also employed the services of an outside vendor not sure his work received the same scrutiny. I worked in the Browning gunsmithing shop for several years and had to redo a few blue jobs that did not pass muster.
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