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Old 2018-02-14, 8:51pm
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Speedslug Speedslug is offline
Phill
 
Join Date: Mar 21, 2009
Location: Winnebago, MN
Posts: 2,489
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Aye, all glass will devitrify if you cook it long enough even if it doesn't have arsenic in it.

When they make glass in crucibles that hold a couple hundred pounds the fumes from cooking the powdered minerals need to be filtered so that they don't contaminate the country side.

So it takes more than just melting it in a kiln.

We humans are learning to clean up after ourselves, eventually.
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