. Hemp hurds as paper-making material. s extensively cultivated, it is retted in water, but waterretting has never been practiced in the United States except to alimited extent before the middle of the last century. Hurds from D. of PVOCT 10 1916 HEMP HURDS AS PAPER-MAKING MATERIAL. water-retted hemp are cleaner and softer than those from dew-rettedhemp. The fiber is sometimes broken from dry liemp stalks without hurds thus produced contain a small percentage of soluble gums,chiefly of the pectose series. Comparatively little hemp is preparedin this manner in America. Process retti
. Hemp hurds as paper-making material. s extensively cultivated, it is retted in water, but waterretting has never been practiced in the United States except to alimited extent before the middle of the last century. Hurds from D. of PVOCT 10 1916 HEMP HURDS AS PAPER-MAKING MATERIAL. water-retted hemp are cleaner and softer than those from dew-rettedhemp. The fiber is sometimes broken from dry liemp stalks without hurds thus produced contain a small percentage of soluble gums,chiefly of the pectose series. Comparatively little hemp is preparedin this manner in America. Process retting by means of weak solutions of chemicals or oils inhot water is practiced to a limited extent. The hurds from theseprocesses may contain traces of the chemicals or oils and also solublegums in greater degree than those of the dew-retted or water-rettedhemp. PROPORTION OF HURDS TO FIBER AND YIELD PER ACRE. The yield of hemp fiber varies from 400 to 2,500 pounds per acre,averaging 1,000 pounds under favorable conditions. The weight of. Fig. 1.—Hemp-breaking machine. The stalks are fed sidewise in a continuous layer 2 to 3 inches thick,turning out about 4,000 pounds of clean fiber per day and five times as much hurds. hurds is about five times that of the fiber, or somewhat greater fromhemp grown on peaty soils. A yield of 2 J tons of hmds per acre maybe taken as a fair average. HURDS AVAILABLE FROM MACHINE-BROKEN HEMP. Hemp hurds are available only from hemp which is broken bymachines, when the hurds may be collected in quantity in one place(figs. 1 and 2). Most of the hemp m Kentucky is still broken byhand brakes. These small brakes are moved from shock to shock, sothat the hurds are scattered all over the field in small piles of lessthan 50 pomids each, and it is the common practice to set fire to themas soon as the brake is moved. It would be difficult to collect themat a cost which would permit their use for paper stock. Where machine brakes are used, the hemp stalks are
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