Redearth

Alternate Names: Red Earth

Description: Plainsman Native Clay

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%	-
LOI	5.70%	n/a
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 The most common commercially 200 mesh available raw terra cotta clay in North America. It fires red, has low plasticity and matures a low kiln temperatures.
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 Point	PCE 12

By Tony Hansen
Follow me on

Got a Question?

Buy me a coffee and we can talk