Nitre Bluing!
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Old 06-11-2014, 04:26 AM   #1
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Default Nitre Bluing!

Those of you that have followed my posts on this forum or on my blog are aware that I have been experimenting with different types of bluing. One that I wanted to get a handle on is nitre bluing. Nitre bluing produces a peacock or electric blue color and is a nice contrast against a high polished black bluing job

This is what I am talking about




well I messed around with some different formulas and was able to get this:


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Old 06-11-2014, 06:46 PM   #2
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Looks great! Did you know you can easily get the same effect on small parts with heat?

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Old 06-11-2014, 06:55 PM   #3
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I'm interested in your process if you'd tell us.

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Old 06-11-2014, 07:16 PM   #4
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Sure! Basically, all you do is heat carbon steel until it turns the color you want. You must stop heating at exactly the right time. Look up color charts for heat treating steel. I use a torch, but any source of heat will work. If you screw up, just sand it off and redo.
Practice on scrap steel first.
This process doesn't work on stainless.

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Old 06-11-2014, 09:52 PM   #5
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hey Bill thanks for the info. really I was wanting TinCan to post up his method if he would. sorry for the confusion from me.

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Old 06-12-2014, 04:50 AM   #6
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Here is the heat bluing process, it is harder than it looks, you have to remove it from the heat at just the right time

http://tincanbandit.blogspot.com/2014/06/heat-bluing.html

The Nitre Blueing process involves the use of Potassium Nitrate (2 parts) Sodium Nitrate (1/2 part) and a pinch of Manganese Dioxide. Heated to roughly 590 degrees, you soak the parts for a few minutes and then quench in water

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Old 06-12-2014, 01:16 PM   #7
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thanks for the info TinCan

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Old 06-14-2014, 02:53 AM   #8
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Brownells sells the Nitre bluing salts and you can use a lead casting pot to heat them to the melting point. I use a Lee Pro casting furnace. Initial investment around $120 and you can do all kinds of small parts or basically anything that will fit in the pot.

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Old 08-01-2014, 10:49 PM   #9
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Quote:
Originally Posted by BillDeShivs View Post
Sure! Basically, all you do is heat carbon steel until it turns the color you want. You must stop heating at exactly the right time. Look up color charts for heat treating steel. I use a torch, but any source of heat will work. If you screw up, just sand it off and redo.
Practice on scrap steel first.
This process doesn't work on stainless.
I use a torch & it looks awesome + safe! After its the color you want put it in oil quickly. Its does not protect from rust as well as bluing it would but looks good. You need to use wax after you done too. This works great (Micro Crystalline) Screws are ok but pins.. good luck getting them back in without messing them up. On a torched colored receiver (or hard cased) it looks amazing! play around with it if you end up not liking it re polish it & try again (or just blue it) Have fun
http://www.brownells.com/gunsmith-tools-supplies/stock-work-finishing/stock-waxes/micro-crystalline-wax-cleaner-polish-prod236.aspx
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Old 09-19-2014, 04:08 PM   #10
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I did some more Nitre Bluing, this time with the help of a commercial grade thermometer to make sure my temperature was spot on. I nitre blued some parts on my Ruger Vaquero



You can see the write up here: http://tincanbandit.blogspot.com/2014/09/ruger-vaquero-upgrades.html

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