Bidery, named after the town of Bider in India, is an alloy, primarily composed of copper, lead, tin, to every 3 oz. of which 16 oz. of spelter (zinc) are added. Many articles of Indian manufacture, remarkable for elegance of form and gracefully-engraved patterns, are made of it. It is said not to rust, to yield little to the hammer, and to break only when violently beaten. Articles formed from it are generally inlaid with silver or gold and polished. Research Bidery
Brazing is a form of soldering by means of a kind of brass called spelter. The surfaces to be united are thoroughly cleaned, and heated by a forge or blow-torch, spelter is then applied to the joint in the form of a wire or filings along with borax which acts as a flux. Research Brazing