Ione Industrial kaolin Clay is a high purity kaolin clay, which is low in iron and alkali content, a run-of-mine kaolin that is sold out of stockpiles. The low iron, low alkali and high aluminum content makes this an ideal kaolin for cement production, and for application in the rubber, fiberglass and agriculture industries. Si02 47.0% Al203 36.31% Fe203 0.55% Ti02 2.4% Ca0 0.05% Na20, K20 70 +325 mesh 5-15% pH (40% solids) 4.0 Moisture Dry 12-16% Raw clay color - white High purity kaolin clay sold in bulk/supersack.