The rubber tree book . nal labourspent on them. A number of well-informed people takethe view that if itwere not for the re-quirements of scrap-rubber, bark-shavingsand earth-rubber, it isprobable that in a yearor two we should findonly finisher-mills inthe factory to preparesheets for smoking. The future factory, it is thought, mayhave no creping mills, and a change of this sort may verywell come about. The question of how best to grade the rubber deserves verycareful consideration by rubber-growers. Practice varies agood deal in regard to this matter. Some have advocated asmany as five grade
The rubber tree book . nal labourspent on them. A number of well-informed people takethe view that if itwere not for the re-quirements of scrap-rubber, bark-shavingsand earth-rubber, it isprobable that in a yearor two we should findonly finisher-mills inthe factory to preparesheets for smoking. The future factory, it is thought, mayhave no creping mills, and a change of this sort may verywell come about. The question of how best to grade the rubber deserves verycareful consideration by rubber-growers. Practice varies agood deal in regard to this matter. Some have advocated asmany as five grades of rubber, namely, first-latex, lump-rubber,scrap-rubber—inclusive of the cup-washings—bark-shavingsand earth-rubber. This is quite too long a list and the quantitiesof some of these would be quite small and troublesome to keepapart. Generally speaking three grades should be quite sufficientfor all purposes. Certainly the strained latex should be thestandard for first-grade rubber. If the lump-rubber, after it is. Fig. 53.—The Universal Washing-machincjwith Trough and Rollers tilted. 196 THE RUBBER TREE BOOK thoroughly washed and rolled out, is found to closely correspondin appearance with the first-latex, then the sheets may be addedin among the first quality. Unless, however, the lump-rubbersheets are found to be quite equal in quality and appearance,which will rareh^ be the case, they should on no account beadded to first-quality rubber. The quantity of this rubber asa rule is not—and should not be—^great, and might, if added tofirst-latex quality, if it was inferior, drag down the standardand diminish the price obtained for the whole, thus involvinga far greater loss than if kept as a second grade, or even addedto the scrap-rubber quality. \Miile there may be some dispute as to whether lump-rubbershould, or should not, be in a first or second grade, there shouldbe no question but that scrap-rubber, cup-washings and bark-shavings should be ultimately united to fo
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Keywords: ., bookcentury1900, bookdecade1910, bookidrubbertreebo, bookyear1913
