Creamware printers to Josiah Wedgwood by 1763, for example. By 1760 creamware was often enamelled for decoration, using a technique adopted from the early porcelain industry. This consisted of painting overglaze on the ware with pigments made from finely powdered coloured glass and then firing again to fuse the enamel to the ware. The varied enamel colours did not fuse at the same temperature so several firings were generally needed, adding to the expense. There were approximately 130 potteries in North Staffordshire during the 1750s, rising to around 150 by 1763 and employing up to 7,000 people – a large number
Jasperware yellow probably coming from a salt of antimony, and black from iron oxide. Other colours sometimes appear, including white used as the main body colour, with applied reliefs in one of the other colours. The yellow is rare. A few pieces, mostly the larger ones like vases, use several colours together, and some pieces mix jasperware and other types together. The earliest jasper was stained throughout, which is known as "solid," but before long most items were coloured only on the surface; these are known as "dipped" or "dip". Dipping was first used in 1777, Wedgwood writing that "the Cobalt