Gerstley insight-live.com/glossary/129">Borate (compared with Ferro frit 3124) from 1600-1750F. At 1550F (not shown) it suddenly shrinks to a small ball and then by 1600F it has expanded to double its size. By 1650 it is well melted, but still gassing and bubbling.
Pages that reference this post in the Digitalfire Reference Library:
Gerstley Borate, 870-Gerstley Borate Melts Suddenly
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