Word: latex
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...Stevens and E. J. Parry, have been unable to find substitute accelerators as good as the smelly ones. On the other hand they found that zinc carbonate added during the manufacturing process reduced smells to a minimum, and very simply. More complicated and costly is the purification of the latex (the original rubber fluid tapped from the trees) by digestion with dilute caustic, centrifuging, creaming, dialysis, or ultrafiltration...
Seiberling Latex Products Co. Akron, Ohio...
...spite of the present low price of rubber (about 5^ per Ib.) Duprene would have enough uses to warrant its production on a large scale, could be developed to replace natural rubber entirely in case the U. S. supply were shut off. In addition to Duprene, an artificial latex (mother liquid of rubber) was also produced from chloroprene which can impregnate porous materials that real latex cannot penetrate...
...gelatin-latex treated cotton fabric, developed by Goodyear-Zeppelin for gas cells to take the place of goldbeater's skin (intestine of cattle) heretofore used in dirigibles. (To supply the Akron, the intestines of 1,500,000 cattle would have been required...
...have been built, heavy trucks imported; railroad tracks have been laid. The only primitive factor remaining is the labor-cheap labor that can be bought for about 30? a day. Loinclothed natives do most of the work. They slit the rubber tree's bark, gather the soft flowing latex, load it into tank cars. This type of worker has no pride in his job, nor does he become devoted to the boss directly over him. Yet last week perhaps a few of the natives working on some 46,000 acres of Goodyear Rubber Plantation Co.'s Sumatran rubber...