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
Vincennes porcelain from the new site, made lavish purchases of them to decorate her rooms and d'Argenson's anecdote of her receiving Louis XV there in a conservatory furnished in winter with perfumed porcelain flowers among those from the hothouse, is a familiar one; the inventory after her death showed that she owned 46 decorative items decorated with porcelain flowers. Vincennes porcelain The Vincennes porcelain manufactory was established in 1740 in the disused royal Château de Vincennes, in Vincennes, east of Paris, which was from the start the main market for its wares. The entrepreneur in charge at first, Claude-Humbert Gérin, established workshops