Kentucky OM #4 Ball Clay : 10 Pound

KENTUCKY OM #4 BALL CLAYOld Mine #4OM4SiO2 55.2%Al2O3 27.9Fe2O3 1.1TiO2 1.2MgO 0.4CaO 0.3K2O 1.0Na2O 0.3P2O5SO3L.O.I. 12.6P.C.E. Cone 32Geographical Source:Western KentuckyGeological Source:Sedimentary clay and volcanic ash material deposited by water; formed primarily duringmiddle Eocene epoch approximately 46 million years agoCharacteristics:Ball clays are fine-grained highly plastic clays containing a fair amount of carbonaceousorganic matter. Ball clays are generally used in quantities of no more than 25% of thetotal constituents of a clay body due to their high shrinkage rates and levels of impurities.Total Cone 10 Shrinkage Rate: 16.5%