A sodium-calcium-borate compound used as a low and mid-range glaze flux. This is a conglomerate mineral made up primarily of Colemanite, Ulexite and Hectorite.
Typical analysis:
B2O3
26.80%
CaO
19.40%
SiO2
14.80%
NaO2
3.95%
MgO
3.54%
Al2O3
0.98%
Fe2O3-T
0.425%
K2O
0.399%
P2O5
0.053%
TiO2
0.05%
MnO
0.024%
Trace minerals
0.079%
LOI
29.50%
This material is partially soluble and can flocculate glaze slops. It can help prevent crazing when used in small amounts, and can act somewhat as an opacifier in larger amounts, giving glazes a milky appearance. A standard substitute in glazes calling for Colemanite.��
Gerstley Borate
$16.95 – $245.00
Description
A sodium-calcium-borate compound used as a low and mid-range glaze flux. This is a conglomerate mineral made up primarily of Colemanite, Ulexite and Hectorite.
This material is partially soluble and can flocculate glaze slops. It can help prevent crazing when used in small amounts, and can act somewhat as an opacifier in larger amounts, giving glazes a milky appearance. A standard substitute in glazes calling for Colemanite.��
Safety Data Sheet
Additional information
1kg, 22.7kg, 500g, 5kg
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