Author Topic: Nitre blue experiment  (Read 442 times)

Offline ssb73q

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Nitre blue experiment
« on: January 24, 2018, 10:11:59 AM »
Hi, I wanted to give nitre bluing a try. I had the Brownells Nitre salts, Lee 20lb lead pot, and lead thermometer for a number of months. I took a beat up 1851 cylinder, removed the old bluing with vinegar, polished the cylinder, and then did the nitre bluing. The niter salt bath was held to 650 dF during the bluing. It only took a couple of minutes to get the blue color I wanted.

This is the old cylinder with the bluing removed with vinegar:



This is the cylinder polished with a buffing wheel:



This the cylinder after nitre bluing:





The cylinder is being dried in the oven and will then be oiled to "cure" the bluing.

The overall investment in time was ~2 hours, that includes the time of the cylinder in vinegar.

I think I was pretty successful for my first nitre bluing attempt.

Regards,
Richard
« Last Edit: January 24, 2018, 10:16:15 AM by ssb73q »
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Offline ssb73q

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Re: Nitre blue experiment
« Reply #1 on: January 24, 2018, 10:50:45 AM »
Hi, after oiling the cylinder, I noticed that the bluing darkened. The cylinder color now looks like my Uberti 1860 charcoal blue revolver. The cylinder oiled with Ballistol:



Regards,
Richard
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Offline Bishop Creek

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Re: Nitre blue experiment
« Reply #2 on: January 24, 2018, 11:17:46 AM »
I love the look, nice job!

Offline Captainkirk

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Re: Nitre blue experiment
« Reply #3 on: January 24, 2018, 12:14:01 PM »
Hot dayumm! Are those salts pricey?
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Offline ssb73q

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Re: Nitre blue experiment
« Reply #4 on: January 24, 2018, 12:22:45 PM »
Hi Kirk, you can go cheap using stump remover, see:

https://www.youtube.com/watch?v=5_IeMl6R8fc&t=31s

Regards,
Richard
Thereís nothing better in the morning than the smell of bacon and black powder smoke!

Offline G Dog

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Re: Nitre blue experiment
« Reply #5 on: January 24, 2018, 01:30:41 PM »
Lookin good, there.  Nice job.

Thatís a new use (to me) for stump remover.  Iíve used it to paint the paper on paper carts.  Donít know if it helped but it didnít hurt either; burnt up is burnt up.

Blackie at Shamanís Forge talks about that bright potassium nitrate  bluing as one reason why the finish on originals aged and patinaed-up fast the way they did. 
     https://youtu.be/jM6nfhJHunU?t=60

The man on the vid slamming those 1911 parts around made me cringe Ė but still a good vid for all of that.
« Last Edit: January 24, 2018, 01:33:17 PM by G Dog »

Offline 99whip

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Re: Nitre blue experiment
« Reply #6 on: January 24, 2018, 01:50:27 PM »
Looks good Richard.  The darker color you got after oiling it seems to have some purple to it, or is that just the way the light looks in the photograph? 

I have used the stump remover for nitre bluing and it worked really well, though the finish doesn't seem particularly durable. 

Offline jaxenro

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Re: Nitre blue experiment
« Reply #7 on: January 24, 2018, 04:12:40 PM »
Sweet it looks good.
Check out my website www.percussionrevolvers.com

Offline Hawg

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Re: Nitre blue experiment
« Reply #8 on: January 24, 2018, 05:47:38 PM »
It looks very good. How durable is it?

Offline ssb73q

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Re: Nitre blue experiment
« Reply #9 on: January 25, 2018, 04:24:34 AM »
Hi Hawg, my research suggests that nitre bluing is less durable than hot bluing, but more durable than cold bluing.

This is my Uberti 1860 with charcoal bluing that I think is nitre blue:



Some vendors warn on buying charcoal blue revolvers because of the bluing durability. It wears fast and turns gray as it ages. IMO that's exactly what a purest desires in a replica revolver, a revolver that ages like the originals.

I'm thinking of nitre bluing my Poor Boy revolver, Poor Boy currently:



Regards,
Richard

Thereís nothing better in the morning than the smell of bacon and black powder smoke!

Offline Captainkirk

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Re: Nitre blue experiment
« Reply #10 on: January 25, 2018, 07:08:03 AM »
Nitre bluing does wear much faster than hot blue. Witness the Remington 'Rattlesnake' revolvers that were put out in limited quantity a decade or two ago; most of them now show some loss of bluing, and those that have seen heavy use have lost much of it. But dayumm, they look good, and even the worn ones look authentic. I like it!
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Offline scooby

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Re: Nitre blue experiment
« Reply #11 on: January 25, 2018, 04:25:48 PM »
Yep, that is a very good showing right there Richard. I expect that before much more time passes, you will also be doing barrels and back straps. Boy howdy, back that up with some bone case hardening and you could go back to work full time making these reproductions really shine.

Offline ssb73q

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Re: Nitre blue experiment
« Reply #12 on: February 05, 2018, 09:45:02 AM »
Hi, this is not Nitre Bluing, but rather Hot Water Bluing, interesting:

https://www.youtube.com/watch?v=Uzw2cWbLGbw

I ordered the chemicals to give it a try.

Regards,
Richard
Thereís nothing better in the morning than the smell of bacon and black powder smoke!

Offline ssb73q

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Re: Nitre blue experiment
« Reply #13 on: February 07, 2018, 08:19:31 AM »
Hi, I bought some stainless steel tanks to do hot water bluing, but learned that the sodium hydroxide in the water bath can negatively react with the steel of the gun parts. It seems that an iron tank is required. To that end, I ordered an iron tank from Brownells, see:

https://www.brownells.com/aspx/search/productdetail.aspx?sid=3842&pid=1060

This tank can be used for both nitre or hot water bluing.

I also ordered a face shield for safety, see:

https://www.amazon.com/gp/product/B001UHC0HI/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

Regards,
Richard
Thereís nothing better in the morning than the smell of bacon and black powder smoke!