Lincoln-type pottery has only been found in Lincoln. It is a hard, sandy ware, similar to Thetford-type ware but fired to a higher temperature giving a metallic finish, varying in colour from dark grey to orange. Forms known are globular cooking pots and straight-sided bowls with coarse rouletting.
A very fine black or grey pottery was produced around Margidunum during the late 1st to early 2nd century. These sherds are from bowls with stamped and rouletted decoration and would originally have been polished to a high sheen.
Reference
http://www.regia.org/research/life/pottery.htm