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D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
D21H17/63—Inorganic compounds
D21H17/66—Salts, e.g. alums
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Inorganic Chemistry
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FR579613D1923-06-301923-06-30Procédé de traitement des papiers, cartons et feutres en vue d'augmenter leur résistance et de les rendre imperméables
ExpiredFR579613A
(fr)