Meissen porcelain further precaution, very few workers knew the special secret ("arcanum") of how to make porcelain, and then perhaps only part of the process. Thus, for a few years, Meissen retained its monopoly on the production of hard-paste porcelain in Europe. By 1717, however, a competing production was set up at Vienna, as Samuel Stöltzel sold the secret recipe, which involved the use of kaolin, also known as china clay. By 1760 about thirty porcelain manufacturers were operating in Europe, most of them, however, producing frit based soft-paste porcelain. In order to identify the original Meissen products, Meissen developed markings that
Coalport porcelain Co. in 1814 The same year John Rose moved the Caughley production the short distance to the Coalport site. Rose's rapid success enabled him to buy the Nantgarw porcelain manufactory in 1819 and the Swansea porcelain manufactory, with their repertory of moulds. John Rose died in 1841; the enterprise was continued under the former name "John Rose & Co." by his nephew W.F. Rose and William Pugh. William Pugh continued the production as sole proprietor from 1862 until his death in 1875, after which the company was put in receivership by his heirs. It was purchased in 1880 by the