Inclusions in the pottery, to prevent shrinkage in the kiln, vary between geological regions.
Differences in style and fabric helps pottery specialists to identify vessels which are not of local manufacture.
It was a family industry, continuing through generations.
Clay pits were usually dug quite close to the kiln, on the peasant's croft or common.
These have provided us with information on what could and couldn't work, and are useful for interpreting the remains of structures in the ground.
This is because pottery is: Small fragments of pottery, known as sherds or potsherds, are collected on most archaeological sites.Occasionally whole vessels are found, particularly where they have been used as grave goods or cremation 'urns'.These are important in providing us with a type series of vessel forms, although broken vessels can be just as useful for this. The clay from which it is made often contains pieces of burnt flint or other stone and the pottery appears very coarse.Most Roman pottery, however, consisted of coarse sandy greywares which were used for cooking, storage and other daily functions.
By the early 5th century, the art of pottery manufacture with a wheel had been lost (or was simply not required) in Britain.
Highly decorated tableware, including fine red and whitewares, were available during the Early Roman period.