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Old 03-04-2006, 03:09 PM
Peet Robison
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I would not use Manganese with cullet. I don't think you will ever get a strong color no matter how much you use. I consider cullet "reduced" in the sense that there is very little O2 left in it. Manganese needs O2 to be purple. This was the reason using cullet for copper reds works fine if you don't mind the swirls.
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