Not to stray from topic here, but the colors obtained by nitre salts is dependent strictly on temperature. Not time.
Well, yes if the salts are a given temp and you put the given part in and then remove it before it comes up to the temp of the salts, it will reach a color different than normal for the temp of the salts.
But... what I am getting at is, if the part reaches the temp of the salts, it will turn that color for that temp range. Regardless of how long the part is in the salts.
The same goes with flame bluing. The part will change the range of colors as the temp increases.
Nitre salts can also give nice black colors in the 750-825 degree range.
This is the proper finish for Parker trigger guards, and triggers, ssbps, etc...
In fact, I nitre blued a large lot of parts this afternoon.
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B. Dudley
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