1879 J. J. Young 56 Natural porcelain is made from kaolinic clay.
1885 XIX. 642/1 Bristol porcelain is of interest as being the first hard natural porcelain made in England.
1907 at Porcelain The name properly belongs to the hard paste or natural porcelain, composed of Kaolin combined in China with Petuntse, elsewhere with some siliceous material.