Caoutchouc

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..... olid 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 resilient solid; at 0 .....

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..... erence of the tree. The trees are ordinarily rested for two months or more each year. After the latex has been gathered it is brought to the plantation warehouses and coagulated by acetic acid or some other chemical. The resulting rubber comes on the market as `crepe' rubber or, if it has gone through a smoking process, as `smoked sheet'". `Caoutchouc' is, thus natural rubber which includes latex .....

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