Caoutchouc

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....id substance polymerized by the drying and coagulation of the latex or milky juice of rubber trees and plants'. `Caoutchouc' is described in Encyclopaedia Britannica as, `the principal constituent of natural rubber and therefore sometimes called pure rubber. It occurs as a vegetable gum, mixed with 1/20 to 8 times its own weight of other substances. Caoutchouc is a white resilien....