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Forums10
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Apr 29th, 2024
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Joined: May 2008
Posts: 925 Likes: 253
Sidelock
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Sidelock
Joined: May 2008
Posts: 925 Likes: 253 |
Doug;
Jack Rowe, late of Birmingham gun trade, believes that rust blacking formula that contain nitric acid will not produce gloss finish. What is your experience in this regard.
Regards;
Bv
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Joined: Dec 2008
Posts: 2,292
Sidelock
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Sidelock
Joined: Dec 2008
Posts: 2,292 |
Bv,
I would agree with Jack Rowe after many various experiments with all types of blacking formula's over the years. I think nitric acid formula's are good for mild etching, but as a result they degrade the gloss finish.
Bv, I have a couple of my own formulas that I developed by trial and error years ago, with some old junk barrels, and they do not include nitric or hydrochloric acids.
Best Regards,
Doug
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Joined: Aug 2013
Posts: 388 Likes: 1
Sidelock
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Sidelock
Joined: Aug 2013
Posts: 388 Likes: 1 |
From Des Barnes book "Amateur Gunsmithing" , His rust bluing solution :
Nitric acid 10ml, copper sulphate 10g, distilled water 40ml.
I have used this and it produces a nice finish, not an exhibition grade gloss finish , but who needs that.
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Joined: Feb 2008
Posts: 11,344 Likes: 390
Sidelock
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Sidelock
Joined: Feb 2008
Posts: 11,344 Likes: 390 |
Those barrels look fantastic Doug. Have you done any Damascus barrels?
A true sign of mental illness is any gun owner who would vote for an Anti-Gunner like Joe Biden.
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Joined: Jan 2013
Posts: 1,124 Likes: 195
Sidelock
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Sidelock
Joined: Jan 2013
Posts: 1,124 Likes: 195 |
One of the finest formulas for obtaing very high gloss finish is Swiss Black (Beutel) formula because it contains no Nitric or Hydrochloric Acid so it does not attack the metal surface too aggressively. Hence you end up with finer rust particles and only extremely fine surface pitting. Also you can adjust the aggressiveness of the formula by adjusting the amount of Alcohol used this allows for humidity and temperature variations. Though it takes a lot of passes to obtain a rich dark colour hence the high cost of having barrels blued this way.
The only lessons in my life I truly did learn from where the ones I paid for!
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Joined: May 2011
Posts: 742
Sidelock
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Sidelock
Joined: May 2011
Posts: 742 |
Doug, I LIKE your work, brudda!
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Joined: May 2008
Posts: 925 Likes: 253
Sidelock
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Sidelock
Joined: May 2008
Posts: 925 Likes: 253 |
Damascus; In the Swiss Black formula, I assume that you mean to add more Alcohol when ambient humidity is very high????? I have been using 95% grain Alcohol (made for human consumption)in my Swiss Black formula what type of Alcohol do you use for this formula? I have thought of trying 91% Isopropyl Alchol. Bv One of the finest formulas for obtaing very high gloss finish is Swiss Black (Beutel) formula because it contains no Nitric or Hydrochloric Acid so it does not attack the metal surface too aggressively. Hence you end up with finer rust particles and only extremely fine surface pitting. Also you can adjust the aggressiveness of the formula by adjusting the amount of Alcohol used this allows for humidity and temperature variations. Though it takes a lot of passes to obtain a rich dark colour hence the high cost of having barrels blued this way.
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Joined: Jan 2013
Posts: 1,124 Likes: 195
Sidelock
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Sidelock
Joined: Jan 2013
Posts: 1,124 Likes: 195 |
Hi Bushveld I always add about 5% more Alcohol to the formula because I live in the “Cheshire Gap” here in Britland which is more or less at sea level and facing the Irish Sea, so the atmosphere is always high in moisture and with the warmer weather of summer the rusting can be far too rapid. The Alcohol I use is obtained from a Laboratory Chemical suppliers under its Lab name of Ethanol Absolute. 
The only lessons in my life I truly did learn from where the ones I paid for!
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Joined: Mar 2002
Posts: 1,815 Likes: 4
Sidelock
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Sidelock
Joined: Mar 2002
Posts: 1,815 Likes: 4 |
Per Angier-- adding about 1-2% Ammonium CHLORIDE increases the black of the finish. I use it as an additive in my Baker modified solution.
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Joined: Dec 2008
Posts: 2,292
Sidelock
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Sidelock
Joined: Dec 2008
Posts: 2,292 |
Those barrels look fantastic Doug. Have you done any Damascus barrels? Thanks Keith, yes I've refinished quite a few damascus barrels over the years, both blacked and browned. Best Regards,
Doug
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