•The secret to cool bodies and glazes is a lot of testing.
•The secret to know what to test is material and chemistry knowledge.
•The secret to learning from testing is documentation.
•The place to test, do the chemistry and document is an account at https://insight-live.com
•The place to get the knowledge is https://digitalfire.com

Sign-up at https://insight-live.com today.

A1 Ball Clay

PR#3 A1, Pyritic bentonitic ball clay

OxideAnalysisFormula
CaO0.73%0.073
MgO0.88%0.122
K2O0.70%0.041
Na2O0.05%0.004
P2O50.40%0.016
TiO20.80%0.056
Al2O318.30%1.000
SiO259.30%5.500
Fe2O34.07%0.142
MnO0.09%0.007
LOI13.60
Oxide Weight475.55
Formula Weight550.41
If this formula is not unified correctly please contact us.

A1 is mined by Plainsman Clays in southern Saskatchewan, Canada. It is at the top of the whitemud formation just under the Battle formation. It is the dirtiest clay they use (highest in iron stone concretions and soluble iron salts).

A1 is a heavily stained bentonitic ball clay with pyrite particles. This material is useful in high temperature reduction brown or red burning clay bodies to impart plasticitY, iron speckle and variations in fired surface character. It is normally not used in quantities above 10%.


Ravenscrag Saskatchewan clays fired at cone 10R (top) and at cone 10R with glaze (bottom): A1, A2, A3, 3B, 3C, 3D. The bottom row has also shows solubles salts (SOLU test).

Plainsman A1 firing test bars

Plainsman A1 firing test bars

Cone 10 reduction (top), 11 down to 9 oxidation below. The dark color is partly from iron bearing soluble salts that are left on the surface after drying.

Out Bound Links

In Bound Links


By Tony Hansen

XML for Import into INSIGHT

<?xml version="1.0" encoding="UTF-8"?> <material name="A1 Ball Clay" descrip="PR#3 A1, Pyritic bentonitic ball clay" searchkey="" loi="0.00" casnumber="70694-09-6"> <oxides> <oxide symbol="CaO" name="Calcium Oxide, Calcia" status="" percent="0.730" tolerance=""/> <oxide symbol="MgO" name="Magnesium Oxide, Magnesia" status="" percent="0.880" tolerance=""/> <oxide symbol="K2O" name="Potassium Oxide" status="" percent="0.700" tolerance=""/> <oxide symbol="Na2O" name="Sodium Oxide, Soda" status="" percent="0.050" tolerance=""/> <oxide symbol="P2O5" name="Phosphorus Pentoxide" status="" percent="0.400" tolerance=""/> <oxide symbol="TiO2" name="Titanium Dioxide, Titania" status="" percent="0.800" tolerance=""/> <oxide symbol="Al2O3" name="Aluminum Oxide, Alumina" status="" percent="18.300" tolerance=""/> <oxide symbol="SiO2" name="Silicon Dioxide, Silica" status="" percent="59.300" tolerance=""/> <oxide symbol="Fe2O3" name="Iron Oxide, Ferric Oxide" status="" percent="4.070" tolerance=""/> <oxide symbol="MnO" name="Manganous Oxide" status="" percent="0.090" tolerance=""/> </oxides> <volatiles> <volatile symbol="LOI" name="Loss on Ignition" percent="13.600" tolerance=""/> </volatiles> </material>


Feedback, Suggestions

Your email address

Subject

Your Name

Message


Copyright 2003, 2008, 2015 https://digitalfire.com, All Rights Reserved