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Saint Rose Red

High Temperature Red Stoneware, St. Rose, St Rose

OxideAnalysisFormula
CaO0.61%0.070
MgO0.16%0.025
K2O0.14%0.010
Na2O0.10%0.010
P2O50.04%0.002
TiO21.09%0.087
Al2O315.94%1.000
SiO266.45%7.075
Fe2O38.44%0.338
MnO0.09%0.008
LOI7.00
Oxide Weight595.49
Formula Weight640.31
If this formula is not unified correctly please contact us.

St. Rose red is a unique low plasticity highly iron stained refractory clay that is useful for imparting red coloration to high and medium temperature clay bodies. While many iron bearing plastic clays are on the market, almost all of these are low temperature materials and thus flux to produce brown rather than red colors and higher temperatures. St. Rose Red also contains particulate iron materials which produce a fired character at coarser mesh sizes that is unique in the industry.

Trace Elements ppm Nov 97:
Ba 167
Sr 26
Y 20
Sc 10
Zr 724
be <1
V 122

Pre Nov 97 Analysis:
CaO... 0.44%
K2O... 0.10%
MgO... 0.14%
Na2O.. 0.05%
TiO2.. 1.09%
Al2O3.13.90%
P2O5.. 0.15%
SiO2..67.00%
Fe2O3. 6.91%
MnO... 0.02%
LOI... 7.00%


Varying sizes of iron speckle in a high-iron reduction stoneware clay

Varying sizes of iron speckle in a high-iron reduction stoneware clay

Cone 10R firing of Plainsman FireRed (left), St. Rose Red 42 mesh (center) and St. Rose Red 10 mesh (right). The 10 mesh material produces a reduction speckle and deep red color that is very unique.

An iron fireclay? Yes.

An iron fireclay? Yes.

The natural Plainsman St. Rose Red clay before it is ground. This has about 6% iron oxide and is used to color high temperature throwing and sculpture bodies. It is quite refractory, very unusual for a clay this high in iron. It is from St. Rose, Manitoba.

Plainsman St. Rose Red fireclay fired test bars

Plainsman St. Rose Red fireclay fired test bars

Top to bottom: Cone 10 reduction, cone 11, 9, 8, 7 oxidation. This is a refractory material despite the fact that it is high in iron.

Out Bound Links

In Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Saint Rose Red" descrip="High Temperature Red Stoneware, St. Rose, St Rose" searchkey="" loi="0.00" casnumber=""> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.610" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.160" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.140" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.100" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.040" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="1.090" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="15.940" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="66.450" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="8.440" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.090" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="7.000" tolerance=""/> </volatiles> </material>


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