A highly purified, white, sodium bentonite supplied as a free-flowing powder. Used when high purity and high whiteness are important in suspending glazes.
Specific Gravity: 2.5
pH (5% dispersion): 9.0-10.0
C.E.C. (meq/100g): 70
Dry Brightness (Green Filter): 87
% Moisture Content: 10% Max.
Brookfield Viscosity (60 rpm @ 5% solids): 1098cps
Clays that are not kaolins, ball clays or bentonites. For example, stoneware clays are mixtures of all of the above plus quartz, feldspar, mica and other minerals. There are also many clays that have high plasticity like bentonite but are much different mineralogically.