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Old 03-04-2006, 08:36 PM
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Peet, If you were using the color base batch, there would be no antimony. The clear batch definitely has some but is not as loaded as some clear batch. Antmony acts as an oxygen scavenger in cooling so it can counteract manganese. Manganese acts as its own fining agent since it releases some oxygen on heating and absorbs on cooling.
The results with manganese in cullet can depend on how depleted the oxygen is from melting. Quick well controlled melts might give cullet with better results than long overheated melts.

I think that if you are making cullet to use particularly for making color that there is no reason to go through an entire melt cycle. Get some of it melted, scoop it into water for making good frit. Then finish charging and make a good clear melt.
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