Todd, I saw your comment relative to quenching and wish to caution
When you quench have a deep enough bucket of water so that when you plunge the flask into the water you go DEEP enough not to see any vapors or bubbles come out of the water. All the bad particles should stay under water, trapped and harmless to your lungs this way.
The fact is, the instant the flask is plunged through the surface of
the water, the seriously dangerous particles hit the air you will
breath. You must wear proper breathing protection when quenching, no
matter your theories about depth of water.
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