History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c39.s2.15
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c39.s2.15
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v1.c39.s2.15
In the eastern India, Copper Hoards people had developed copper metal technology sometime before 1500 B.C. Using Singhbhum area ores the artisans could smelt high grade copper; they knew closed casting, alloying by arsenic and lead, annealing and cold work for hardening the tools (Agrawal, 1971, pp. 205, 242; Agrawal, 1982, pp. 213-214).