Scarva Raw Materials Gerstley Borate RM1029  £20.00

18722RM1029/1KGIn Stock1kg
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Scarva Raw Materials LogoA variety of colemanite, a naturally occurring mineral, specially imported by us from the USA.
Mentioned in many American text books, this is a popular flux in studio glazes.

Formula: 2CaO 3B2O3, 5H2O
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