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Joined: Sep 2011
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Brent, don't know. never tried that high a temperature.
With my nitre fertilizer pot, get a nice dark blue on screws and springs at about 700F.
Lower the temperature to about 600F to get the pidgon egg blue some people like.
Chuck

PhysDoc #575542 07/13/20 11:01 PM
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Yes, to get the blues, lower temps. I have done that many times in lead and in nitre, but I wasn't looking for blues like that. I was looking for that charcoal color that Fred got. I did not quite get there. As far as I'm concerned, I won't get there with lead. Maybe nitre, but I suspect, it will have to be the right way - with charcoal. No shortcuts.


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BrentD, (Professor - just for Stan)

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You get a nice black in niter salts at about 825 degrees, I think 880 is too hot.
Steve


http://www.bertramandco.com/
Booking African hunts, firearms import services

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Originally Posted By: BrentD
....The pot got to just under 900F. About 880F or a titch higher. That's as high as I was willing to go....

....At the 20 minute mark....

....I would not want a whole action to deal with like this....

If the goal is to put a final finish on an entire action, a decision should be made ahead of time on the preference to retain any hardness that was present and considered desirable.

PhysDoc #575553 07/14/20 08:10 AM
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Steve, I'll back down and give that a try.

It is worth noting that a highly polished mould sprue plate turns pretty nicely black and it certainly never gets to even 800F, but it takes a long time.


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BrentD, (Professor - just for Stan)

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