History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c14.s3.10

v1.c14.s3.10

We can consider an alternative and perhaps a more practical or an easier way of making dies. The sculptor could have engraved in positive the obverse or reverse design on a lump of specially prepared plastic clay containing aluminium silicate and so possessing high heat-resisting capacity and high softening point (PCE).