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Bisque Ware

COLEMANITE x 500g

Colemanite

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Chemical Analysis: 43% B²O³, 26% CaO, 4.5% SiO²
Hazard Symbol: HARMFUL
Variety or Brand: N/A
Pack: 500g


A powerful flux in glazes introducing an insoluble form of boron. Quantities greater than 5% will cause crawling and should be substituted with Gillespie Borate or Calcium Borate Frit.

Note:  Gillespie Borate is the recommended replacement for Gerstley Borate, which is no longer available.