History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c27.s1.35

c27.s1.35

There are four varieties of it—yellow, white, red and black. That which has the lustre of gold or silver is most appropriate for the fixation of mercury. The last two are indifferent and readily melt like lac and are useless. *Chapala* melts like tin when heated over fire—hence the name. 143-144