Creamware of these potteries would have been producing creamware. Whilst Staffordshire had taken the lead, creamware came to be developed in a number of large potting centres where stoneware was already being produced, eventually replacing stoneware entirely. These included Derbyshire, Liverpool, Yorkshire (including the Leeds pottery) and Swansea. Attribution of pieces to particular factories has always been difficult because virtually no creamware was marked prior to Josiah Wedgwood's manufacture of it in Burslem. At the time manufacturers frequently supplied wares to one another to supplement stocks and ideas were often exchanged or copied. In addition, factories usually sent out their wares
Creamware and the Wedgwood formula was gradually adopted by most manufacturers. One important ware of note however is pearlware, of which there was an increase around 1779. Pearlware is distinct from creamware in having a blue-tinged glaze produced by the use of cobalt and a body somewhat modified to produce a ware that was slightly greyish in appearance. Pearlware was developed in order to meet demand for substitutes for Chinese porcelain amongst the growing middle classes of the time. By around 1808 a fully whitened version of creamware (known as White Ware) was introduced to meet changing market demand. During the