Ceramic Materials

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Foundry Hill Creme

Plastic clay for stoneware clay bodies

Alternate Names: New Foundry Hill Creme, Foundry Hill Cream

OxideAnalysisFormula
CaO0.50%0.044
MgO0.50%0.062
K2O0.70%0.037
Na2O0.55%0.044
P2O50.09%0.003
TiO20.50%0.031
Al2O320.50%1.000
SiO266.20%5.481
Fe2O31.60%0.050
LOI8.20
SO30.09
Oxide Weight453.48
Formula Weight494.47
This is the chemistry of the material (the formula compares numbers of molecules, the analysis compares them by weight). In glazes, the composite chemistry of the mix is the main factor shaping fired properties (e.g. color, melting temperature, surface). In bodies we are interested in their physical properties (e.g. shrinkage, porosity, strength), these are a product of the mineralogy of the materials.
PCE - Pyrometric Cone Equivalent 31

An intermediate-grained ball clay blend offering excellent moisture retention and more plasticity. In plastic bodies, for example, the moisture retention means that items will dry slower and this can lead to a more even drying process.

Relative Viscosity (1.2 Sp. Gr.):* 1.28
Casting Rate: (gms per 15 min/426 cm2):* 209
Water of Plasticity:* 22.9
% Dry Shrinkage:* 3.94
Dry M.O.R., psi:* 239

Cone 04 8 11
----
Fired Shrinkage:* 0.2% 1.6% 1.9%
Absorption:* 20.2% 17.8% 15.2%
M.O.R. psi:* 758 2390 4630

Thermal Expansion, Cone 8: .493% at 700C
P.C.E.: 30
pH: 5.9
Oil Absorption: 28
Bulk Density, lbs per cubic foot: 37-45
Particle Size, Microns: 20 10 5 2 1 0.5 0.2
88% 73% 60% 44% 33% 21% 8%

*Specimens: De-aired, extruded, 50% ball clay, 50% flint

Jim Robinson observes that this material holds all the glazes in his GTS series without shivering, 'probably because cristobalite is not able to form'.


Out Bound Links

In Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="Foundry Hill Creme" descrip="Plastic clay for stoneware clay bodies" searchkey="New Foundry Hill Creme, Foundry Hill Cream" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.500" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.500" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.700" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.550" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.090" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.500" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="20.500" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="66.200" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="1.600" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="8.200" tolerance=""/> <volatile symbol="SO3" name="Sulfur Trioxide" percent="0.090" tolerance=""/> </volatiles> </material>


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