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
Bonaparte Pottery Archeological District are associated with the lumberyard that took over the site after the pottery closed. They were built after the period of historical significance. While modest in size compared with Red Wing Pottery in Minnesota and Western Stoneware in Illinois, Bonaparte Pottery was mid-sized operation associated with the pottery industry in Iowa. Pottery had a significant economic impact on the state from the mid to the late 19th-century. The Des Moines River Valley had the greatest concentration of potteries in the state because of the abundant coal deposits located there. Fire clay, which is used to manufacture ceramics, was a by-product