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Old 04-14-2018, 07:04 PM   #21
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Bill Paul
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Again, my apologies. I should have checked the proper terminology. I mean the recessed hinge pin(screw) and ,or sleeve ? I am getting ready to have the heat treating and nitre bluing done and that question just occurred to me as I was looking at this blog. Thanks again.
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Old 04-14-2018, 07:54 PM   #22
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The hinge pin is case colored. Right along with the frame. Installed into it.
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Old 04-14-2018, 08:45 PM   #23
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Brian, is it customarily removed for the color case-hardening process?





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Old 04-15-2018, 08:41 AM   #24
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No. I remove them for polishing but re-install them and set screw timing before coloring.
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Old 04-19-2018, 05:32 PM   #25
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I heat the nitre salts to 600 degrees and then place the parts to be treated in and watch the color transformation. The parts will go through all the stages of color depending on how long they are in the solution. They have to be carefully watched and removed at the right time to get the correct color for the part being colored.

Perhaps the prettiest color (not right for Parkers) is peacock blue. I use this color on the screws of muzzle loaders and other hardware. The part has to be polished to a bright sheen with 600 grit and then left in the bath longer than the normal Parker nitre blue color.
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Old 04-19-2018, 05:47 PM   #26
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The bluing salts can be used over and over for years. I use a quarter tank and when I'm finished let the solution harden and then place tin foil over the tank. Nitre salts will draw water from the atmosphere which is not good. The tank has to be covered when not in use. I have to add more salts from time to time when the level goes down from use. But a bucket of salts will last for a long time.
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Old 04-19-2018, 05:53 PM   #27
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Quote:
Originally Posted by Bill Paul View Post
Does Niter bluing take differently on different metals? The piece I saw was much "brighter". It was not on a Parker, but Definitely NOT what I have seen here. I would like to have my trigger guard done as close to original as practical, but don't want to have to strip and re-polish it either. Is all niter bluing the same?
Brighter may be because the part was polished to a finer degree. Highly polished parts (not appropriate for a Parker) results in a brighter nitre finish.
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Old 04-20-2018, 11:35 AM   #28
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Brian, I sent you a private message.
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