History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c36.s1.5
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c36.s1.5
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v1.c36.s1.5
Two processes relating to the preparation of copper-plates, as evident from the historical records, are (i) by hammering, then engraving; (ii) by casting in a mould of sand.