Ball clays are kaolinite rich secondary clay which is available in dark brown to black color due to relatively high organic impurity content. Once it fired it will become white to lite cream color. it consist of three major minerals that are kaolinite , mica & quartz. It is a high plastic clay and contains more fine particles. it is also known as plastic clay. The name ball clay came from the mining method of cutting the clay out in balls. Many properties are similar to stoneware clays but stoneware never gives white product after burning. Ball clays are characterized by higher plasticity, dry shrinkage and dry strength as compared to china clays. They are chemically impure and often contain a large proportion of silica, iron and titanium impurities.
Kanchipuram, Tamil Nadu, India
