kaolin

The alkali species yield kaolin by alteration, and are thus the source of china-clay.

Established by M. Haffringue, in the 19th century, with the kaolin of Limoges.

Their faces are painted black across the whole mid section and the chins are covered with white kaolin—a really startling effect.

The kaolin is washed at the pit, and sent in this state to Sèvres, under the name of decanted earth.

This sieve is shaken upon its support, in order to make it discharge the washed argillaceous kaolin.