Minerals and Metals in Ancient India v1.c17.s2.t2.5
Minerals and Metals in Ancient India v1.c17.s2.t2.5
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v1.c17.s2.t2.5
Yet, certain evidences certify a degree of sophistication reached by the authors of the chalcolithic culture people in Bengal. They probably knew the technique of strengthening copper with arsenic and silver. (Dutta, 1982) Some copper slags collected from Parihati (Lat. 22º 31' N long 86º 51' E), Dist. Midnapore in West Bengal and scraps from one of the ‘Parihati Hoard’ have been analysed. The analysis shows the presence of boron added as borax or Na₂B₄O₇, 10H₂O in the slag; evidently this served as flux for the extraction of copper. (Bose, 1987: 43)