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
Liverpool porcelain was said to be known as the "Pottery Capital of the World" (at least in the American Mid-West). The factories included: Richard Chaffers made soapstone-type porcelain featuring mainly Oriental designs at Shaw's Brow. An advertisement for it in 1756 provides the earliest documentation of Liverpool porcelain production, which he continued until his death in 1765. In 1756 he also held a license to mine soapstone at a site in Cornwall. The porcelain resembles Worcester porcelain. Most of the plates made by the factory are octagonal, and some tea and coffee sets are six-sided. A common product was a bulbous mug