#6 Tile Clay is a very plastic kaolin with good green strength. In pottery, the word Kaolin is synonymous with China Clay, a general name for an almost pure version of Kaolinite (a primary clay). Kaolins are usually very white and can be used to increase the refractory properties and vary the particle size of clay bodies.
The full bag from the manufacturer is a 50# bag; brown bag, green text labeled on side.