Putty-powder is the binoxide or dioxide of tin, . It is prepared from the scum or crude oxide which forms on the surface of melted tin, which is removed and purified by calcination, and then ground to powder. Putty-powder is used for polishing stone and glass, for making white enamel, and for giving glass an opaque colour.
Putty-powder
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 501
Source scan(s): p. 0510