Minerals and Metals in Ancient India v1.c28.s7.t2.2

v1.c28.s7.t2.2

The negative of the intended coin-type was engraved or etched on a blank mould made of heat-resisting plastic clay or on a mould in cast metal. If a coin was destined to carry devices on both faces, a second mould had to be prepared and an opening made through the rim of each of the moulds. Some cast coins found still joined together by a bar of metal indicate that these were cast in pairs.