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
Liverpool porcelain Liverpool porcelain Liverpool porcelain is mostly of the soft-paste porcelain type and was produced between about 1754 and 1804 in various factories in Liverpool. Tin-glazed English delftware had been produced in Liverpool from at least 1710 at numerous potteries, but some then switched to making porcelain. A portion of the output was exported, mainly to North America and the Caribbean. The factories produced a great variety of wares and some figures. However the main production was underglaze blue and white porcelain with the fashionable Oriental designs, which Liverpool delftware painters were already well used to. Some transfer-printed wares, both overglaze