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Redearth

Alternate Names: Red Earth

Oxide Analysis Formula
BaO 0.24% 0.01
CaO 0.49% 0.06
K2O 3.27% 0.24
MgO 1.13% 0.19
Na2O 0.73% 0.08
TiO2 0.62% 0.05
Al2O3 14.67% 1.00
P2O5 0.32% 0.02
SiO2 68.99% 7.98
Fe2O3 3.82% 0.17
MnO 0.02% 0.00
LOI5.70%
Oxide Weight 655.66
Formula Weight 695.30

Notes

A maroon firing, low temperature, smooth and plastic material with exceptional working characteristics and green and fired strength. Suitable is the main or only ingredient in high quality terra cotta bodies or low temperature stonewares.

Fired Temperature, Cone 04 02 1 2 3 4 5
-------------------------------------------
Fired Shrinkage: 2.0% 2.9% 6.4% 7.0% 5.5% 4.8% n/a
Absorption: 10.0% 6.0% 2.3% 1.7% 1.1% 1.0% 0.4%
Fired Strength:
(lbs/ square inch) 5200 8500 8300 6600

Sieve Analysis Wet Washed
(Root of 2 series) +35 +48 +65 +100 +150# +200 +325
-------------------------------------------
0.0% 0.5% 2.1% 4.2% 6.8% 17.9% n/a

Texture: Smooth
Plastic Index (1-10): 7
Green Strength (lbs/sqaure inch): 1350
Dry shrinkage: 7.0
Dried density: 2.04
PCE: 12

Related Information

Links

Materials Redart
Suppliers Plainsman Clays
Typecodes Clay Other
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.

Data

Frit Softening PointPCE 12

By Tony Hansen


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