Porcelain Porcelain Porcelain () is a ceramic material made by heating materials, generally including kaolin, in a kiln to temperatures between . The toughness, strength, and translucence of porcelain, relative to other types of pottery, arises mainly from vitrification and the formation of the mineral mullite within the body at these high temperatures. Though definitions vary, porcelain can be divided into three main categories: hard-paste, soft-paste and bone china. The category that an object belongs to depends on the composition of the paste used to make the body of the porcelain object and the firing conditions. Porcelain slowly evolved in China
Chelsea porcelain factory at least in the early period. The annual actions were partly intended for the chinamen, with some lots made up of a range of wares to provide a stock. The East India Company had been selling its cargos of East Asian porcelain at auction for some decades. Chelsea wares reached British America, but there were probably few exports to the Continent. Early English porcelain was soon being collected, especially in the late 19th century, when prices rose steadily. Over the 20th century there has been a great reversal in collectors' interests, with wares from later in the century far cheaper