History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c15.s2.24

c15.s2.24

Brass appears to have been introduced in Northern India quite early, probably through Chinese trade ; but it was later manufactured in India also, by heating copper with calamine and carbonaceous matter. The early specimens with irregular composition were probably made by smelting of mixed ores of copper and zinc, such as exist in China and Sikkim. The later objects having regular composition (13% zinc) were probably manufactured by the calamine method.