Barbotine

Cup, 6.5 cm. high, Aswan, Egypt, 1st-2nd century AD, decorated with type A piped or trailed barbotine patterns.

Barbotine is the French for ceramic slip, or a mixture of clay and water used for moulding or decorating pottery. In English the term is used for three different techniques of decorating pottery, though in all cases mainly for historical works. For clarity, these types are numbered here as A-C (which are not standard terms).

Gallo-Roman cup with type B barbotine or sprigged decoration