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Old 07-10-2018, 01:54 PM
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Pete VanderLaan Pete VanderLaan is offline
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As Dave pointed out reducing a glass chock full of oxygen is not going to go well. Better to case the reduced color with a phosphate opal. Having them fit each other is always a good plan.
Black tin isn't overcoming cullet oxidation. Much of the oxygen is driven out of the initial melt in the first place. A second melt, fritted will have less O2 still. Easier still to just make the low O2 glass in the first place. Use things like potassium hydroxide instead of the carbonate. Shave it where you can.
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