An Encyclopaedia of Indian Archaeology v1.c8.s1.t1.4

v1.c8.s1.t1.4

A necessary preliminary to the making of the coin blanks was the preparation of an alloy. How the blanks were made would depend upon the ultimate form of the coin. The blanks for the large and heavy coins were usually cast in a globular form, which explains the thickness and rounded edges of the coins. Others were cast in terracotta moulds, either individually or in groups. An alternative method would be to cast the metal in long strips and cut them up with chisels into pieces of appropriate size, which were then grasped with tongs, re-heated and worked by hammering into circular discs. The blanks were then treated with acids. After this the weights of individual pieces were adjusted to conform with the mint prescriptions, which in the case of gold and silver coins meant individual testing blank by blank. Next the blanks were struck either hot or cold, both methods with advantages and disadvantages. Finally they were submitted for verification and then put in circulation.