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Preston Stoneware

Description: Legacy stoneware from United Clay Mines

Oxide Analysis Formula
CaO 0.20% 0.02
MgO 0.20% 0.03
K2O 1.90% 0.13
Na2O 0.60% 0.06
TiO2 1.00% 0.08
Al2O3 16.00% 1.00
SiO2 73.50% 7.80
Fe2O3 1.10% 0.04
LOI 5.40%n/a
Oxide Weight 602.44
Formula Weight 636.83

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Typecodes Stoneware Clay
These materials generally contain bentonite, ball clay, kaolin, feldspar, mica, quartz and some iron impurities. They can often be used as a body with few additives.

Data

% < 0.5 microns 32%
Drying Shrinkage 4.9%
Water absorption 0.2% at cone 9
Dry M.O.R. (50% Silica) 560 psi
Firing Shrinkage 11% at cone 9
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