The Bell Metal moulding or ‘Dhokra’ is one of the earliest known methods of metal casting. A form of bronze, with a high tin content, the bell metal is a long-wearing material that is resistant to oxidation. This craft dates back to the Indus Valley Civilization. Now almost lost, this ancient wax thread method of metal casting is still
used by the tribal people of Chhattisgarh, a center-eastern state of India.