The Adolf Gottfried Tonwerke GmbH sees itself as a specialist for functional additives based on specially trained, high-purity Illite (3-layer silicate, non-swellable). High purity and pronounced fineness, down to the nano range, define the high demands placed on the products. A decisive principle in this respect is the renunciation of thermal treatment and the use of chemicals in any form. Thus the natural mineral purity of the products is guaranteed.