small temperature range
Wow some great info here and that heating ring is fantastic, similar to the reverse of a stove burner. Son Made one for me as he is a tinbasher.
Good thing we are not talking about heating temps of steel here as there are unlimited temperatures to treat steel, brass has a way less range to anneal it.
I found too that if you get too close and too red hot with the flame it will impregnate the hot brass with unburned Carbon and turn it black. It's harder to take off too but a bit of scotchbrite works wonders on it.
If you want to be precise in the temps you want use a temple stick of the right degree available at any welding supply place.
With steel, true color of the tempering is a sign of a good smith, and looks great too.
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