| OCR Text |
Show PAPERMAKIN IN INDO-CHIN 4 not possess sufficient resources to enable them to retai astorage of bark. The bundles are spread open and th strips of clean-smelling bark are placed in huge masonr tanks filled with water in which a small amount of milk o lime has been added. In this mild bath the bark undergoe aslight disintegration for the better penetration of theal kaline liquor to be used subsequently in a furtherance o the process. After several days in the lime bath the bark naturally becomes somewhat flaccid, causing it to be receptive to the following procedure The Cooking Proces The duty of the alkaliis to free the cellulose from th glutinous substance that binds the usable fibers together The alkaline liquor is usually prepared by lixiviation o wood ashes, or of the ashes of plants abundant in potassium carbonate. During the boiling of the materialin thi solution the strips of bark are kept in agitation throug theaction ofalongwooden polein the hands ofa worker fresh alkaline liquor is added as the cooking continues thus reducing the bubbling, and also supplying any los through evaporation. The fuel used is rice straw and th discarded rough outerbark. Thelength ofthe boilingdepends upon the natur of the bark, whether from youn or old trees, and upon the strength of the alkali solutio and theintensity of the heat. For making tests of the bar an experienced papermaker withdraws several lengths o the material from the sunken receptacle and ascertain Digital mage © 2005 Marriott Library University of Utah, All rights resarved |
