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  #49  
Old 03-07-2006, 07:14 PM
Peet Robison
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I would have to agree the formula posted by Dave would be high in expansion. I certainly don't know why Soda Ash would be added. I don't insist on using SnO2, it's just much easier to find small quantities. And as far as I am concerned tin is tin and it is a necesaary part of ruby. Black tin (SnO) doesn't "reduce" glass it is just less oxygen to begin with. If your glass base doesn't contain much oxygen such as cullet or sp batch minus the oxidizers then it is quite easy to make a red using SnO2. I am sure stannous chloride would work too. I never noticed a problem melting either form of tin. It melts at 450 deg F.
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