PUMICE-STONE SOAP: See Soaps.
PUNCHES: See Ice Creams.
PUNCTURE CEMENT: See Cement.
PURPLE OF CASSIUS: See Gold.
PUTTY
(See also Lutes, under Adhesives and Cements.)
Common putty, as used by carpenters, painters, and glaziers, is whiting mixed with linseed oil to the consistency of dough. Plasterers use a fine lime mortar that is called putty. Jewelers use a tin oxide for polishing, called putty powder or putz powder. (See Putz Powder, under Jewelers’ Polishes, under Polishes.) {607}
Acid-proof Putty.
II.—A putty which will even resist boiling sulphuric acid is prepared by melting caoutchouc at a moderate heat, then adding 8 per cent of tallow, stirring constantly, whereupon sufficiently slaked lime is added until the whole has the consistency of soft dough. Finally about 20 per cent of red lead is still added, which causes the mass to set immediately and to harden and dry. A solution of caoutchouc in double its weight of linseed oil, added by means of heat and with the like quantity (weight) of pipe clay, gives a plastic mass which likewise resists most acids.