History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c18.s1.3

v1.c18.s1.3

The method of converting iron or other metals into very fine powder form is also found described in Caraka (Ci. 1/3/15-23). Though, initially this method is described with reference to iron only, however, afterwards it is advised to be followed commonly for all the metals (Gold, Silver and Copper etc.) to convert these into fine powder form.