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
Jingdezhen porcelain dominate production for the luxury market under the Qing. The imperial kilns were revived with 6 kilns and 23 workshops, dividing the other parts of the production process between them. Massive orders for the imperial palaces and temples resumed. While imperial taste in decoration remained somewhat conservative, the technical quality of Kangxi imperial wares reached new heights. The imperial kilns led the development of the new palettes of overglaze enamels; "famille verte", developed in two phases, was followed by "famille rose", and later others; these were the last major technical innovations at Jingdezhen, along with a technique for firing gold