- Black glaze, also called “black gloss,” “black-painted,” or “black,” denotes the black slip that is applied to the entire
surface of a Greek vase. Black glaze consists of a diluted form of the natural clay that is transformed through a chemical
reaction during the firing process (see Black-figure). Surface decoration could include added color, gilding, relief, incision
or stamped motifs. It has been suggested that the technique was meant to evoke metal vessels. Athens was the main producer
of black glaze vases until c. 400 BCE. Other regions included South Italy and the Eastern Mediterranean, where they were made
until the 1st c. BCE.