celluloid, hardening and softening



celluloid, hardening and softening defined in 1909 year

celluloid, hardening and softening - Celluloid, Hardening and Softening;
celluloid, hardening and softening - There is no method of hardening celluloid after it is made; if it is required hard, then 3 to 5 per cent, of resin or shellac is mixed with the original pyroxyline for the manufacture of the celluloid. To soften the celluloid and render it flexible castor oil is used. Opaque celluloid may also be made much harder and more like ivory by the addition of mineral matter such as carbonate of lime or zinc oxide.

near celluloid, hardening and softening in Knolik


celluloid, dentalhome
letter "C"
start from "CE"
celluloid, imitation pearl

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