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We have rounded these numbers off for inclusion as a material used in glaze chemistry at Insight-live.com. This document was available as of July 2022, but as of April 2023 it is no longer there.
| Materials | 
Gerstley Borate
 Gerstley Borate was a natural source of boron for ceramic glazes. It was plastic and melted clear at 1750F. Now we need to replace it. How?  | 
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