an Entity references as follows:
Black-burnished ware is a type of Romano-British ceramic. Burnishing is a pottery treatment in which the surface of the pot is polished, using a hard smooth surface. The classification includes two entirely different pottery types which share many stylistic characteristics. Black burnished ware 1 (BB1), is a black, coarse and gritty fabric. Vessels are hand made. Black burnished ware 2 (BB2) is a finer, grey-coloured, wheel thrown fabric.