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Show Artificial Wood From Leaves. Artificial wood from dried leaves especially those of oak, beech or birch is a new product, reported from Austria, Aus-tria, using even cheaper waste material mate-rial than the sawdust already similarly similar-ly utilized. The leaves are finely ground, mixed with a suitable binder, shaped in molds under a pressure ojt 350 atmospheres, , and dried by heat while still under pressure. The best binder is stated to be viscose, though this may be strengthened by the addition addi-tion of a little glue, water-glass, case-In, case-In, rosin, or other substance. The ground leaves are boiled with soda lye before mixing with the solution of viscose vis-cose ; and the viscose. may be prepared from a portion of the leaf powder by treating with soda lye and then with carbon disnlphide. Coloring matter amy be added to the leaf powder or to the pasty mixture. Some filler may be desirable for special purposes, and the materials suitable include asbestos, asbes-tos, infusorial earth, wood flour and Deat flour. |