Ceramics of indigenous peoples of the Americas
The clay body is a necessary component of pottery. Clay must be mined and purified in an often laborious process, and certain tribes have ceremonial protocols to gathering clay. Different tribes have different processes for processing clay, which can include drying in the sun, soaking in water for days, and repeatedly running through a screen or sieve. Acoma and other Pueblo pottery traditionally pound dry clay into a powder and then remove impurities by hand, then running the dry powder through a screen, mixing it with a dry temper, and then mixing water to create a plastic paste. In preparing the clay, potters spend hours wedging it to remove air pockets and humidity that could easily cause it to explode during firing. The clay then needs to "cure" over time.
Winsford
Cornish china clay was used in the production of earthenware and stoneware. The clay was taken overland from Winsford by pack horse to manufacturers in the Potteries, a distance of about . Locally produced salt was also transported to the Potteries, for use in the manufacture of salt-glazed stoneware. Finished ceramics from the Potteries were brought back to Winsford, for export through the Port of Liverpool. That trade ended in the 1780s when the Trent and Mersey Canal opened and carried the goods through Middlewich, bypassing Winsford.