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Application filed by Combinatul Celuloza HirtiefiledCriticalCombinatul Celuloza Hirtie
Priority to RO14081589ApriorityCriticalpatent/RO103606A2/en
Publication of RO103606A2publicationCriticalpatent/RO103606A2/en
The process comprises neutralisation of paper paste of below 5.5 pH. The aluminium sulphate content of 1-6 wt.% and Ca 1.0% of NaOH, relative to the pulp, are supplemented by stilbene triazinic bleaching agent. The bleaching agent concentration is 0.4% relative to the tone of the paper.
RO14081589A1989-07-171989-07-17Optical bleaching method in paper mass highly sized in acid medium
RO103606A2
(en)