Thread: Color bubbles
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Old 11-05-2017, 08:55 AM
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Pete VanderLaan Pete VanderLaan is offline
The Old Gaffer
Join Date: Apr 2002
Location: Chocorua New Hampshire
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Pete VanderLaan is on a distinguished road
Mark talked about cad/sel reds in fluorine that started off compatible in his work and by the time he was done, they were no longer compatible. The effects of heating and cooling repeatedly in a glass does often change them. While John is really cautious about using Hagy seals to determine mismatch, those efforts can sometimes be defeated. The description of the black makes me think of those circumstances.
Where are we going and why am I in this basket?
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