Creamware cheap, good-quality, mass-produced creamware to Europe had a similar impact on Continental tin-glazed faience factories. By the 1780s Josiah Wedgwood was exporting as much as 80% of his output to Europe. Creamware is made from white clays from Dorset and Devonshire combined with an amount of calcined flint. This body is the same as that used for salt-glazed stoneware, but it is fired to a lower temperature (around 800 °C as opposed to 1,100 to 1,200 °C) and glazed with lead to form a cream-coloured earthenware. The white clays ensured a fine body and the addition of flint improved its
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