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Plainsman Native Clay

Alternate Names: Red Stone

Oxide Weight715.66
Formula Weight753.32
If this formula is not unified correctly please contact us.
PCE - Pyrometric Cone Equivalent 15

A natural high iron, mid-temperature stoneware clay of good plasticity. It is particulary well suited to oxidation bodies in the middle temperature ranges. It is very deep red at cone 7-8.

Fired Temperature, Cone 4 5 6 7 8 9
Fired Shrinkage: 3.1% 3.4% 3.7% 4.0% 4.2% 4.4%
Absorption: 6.4% 5.0% 4.0% 3.5% 3.0% 1.9%
Fired Strength:
(lbs/ square inch) 5100 5300 5600 5900 6400

Sieve Analysis Wet Washed
(Root of 2 series) +35 +48 +65 +100 +150# +200 +325
0.0% 0.3% 2.4% 5.1% 7.6% 10.0% 22.2%

Texture: Sl. tooth
Plastic Index (1-10): 5
Green Strength (lbs/sqaure inch): 850
Dry shrinkage: 5.0
Dried density: 2.05
PCE: 15.5

Fire-Red and Restone fired test bars

Fire-Red and Restone fired test bars

Plainsman Fire-Red (left) fired at cone 8,9,10,11 and 10R and Redstone (right) fired at cone 4,5,6,7,8.

Out Bound Links

In Bound Links

By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Redstone" descrip="Plainsman Native Clay" searchkey="Red Stone" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="BaO" name="Barium Oxide, Baria" status="" percent="0.320" tolerance=""/> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.190" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.760" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="2.570" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.050" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.550" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.650" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="13.540" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="72.260" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="4.100" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.010" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="5.000" tolerance=""/> </volatiles> </material>

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