Spelter
The plates of manufactured zinc are called spelter in commerce. Spelter solder is made from equal parts of zinc and copper; this is for ordinary use on brass. A little harder, for copper and iron, is zinc 3, copper 4. See SOLDERS; ZINC.
Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.
The plates of manufactured zinc are called spelter in commerce. Spelter solder is made from equal parts of zinc and copper; this is for ordinary use on brass. A little harder, for copper and iron, is zinc 3, copper 4. See SOLDERS; ZINC.