An Improvement in Sizing Paper.


12,769. Wurster, C. June 22. Sizing.-When paper is sized by means of a resin or fatty soap, the soap is decomposed by means of an acid sulphate, preferably sodium bisulphite, used either alone or in conjunction with aluminium salt, such as aluminium sulphate. Other alkaline bisulphates, or the bisulphates of the alkaline earths or of magnesium or zinc, may be used. When a fatty soap is employed, the hot soap solution is first mixed with the pulp, and then a solution of the bisulphate is added until the pulp gives a distinctly acid reaction with litmus.




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Cited By (2)

    Publication numberPublication dateAssigneeTitle
    US-2940890-AJune 14, 1960Kimberly Clark CoTreatment of cellulosic pulps
    US-3392085-AJuly 09, 1968Continental Can CoMethod of sizing paper with a fatty acid and carbohydrate