Abstract: The present invention relates to a process of bleaching pulp derived from an alkaline pulping process having a hexenuronic acid content prior to the final bleaching stage from about 1 to about 80 mmol/kg dry pulp, said process comprising three chlorine dioxide stages D0, D1, and D2, wherein the chlorine dioxide charges based on the total chlorine dioxide charge in a) D0 is from about 40 to about 60%; b) D1 is from about 30 to about 55%; c) D2 is from about 4 to about 20%, and wherein the final chlorine dioxide stage D2 is performed at a pH from about 2 to about 4.5. The invention also relates to a bleached pulp obtainable by the process.

Abstract: The present invention relates to a method of treating cellulose fibres. The invention further involves the production of paper from said treated fibres and the paper obtainable therefrom. The invention also relates to the use of a cellulose derivative as an additive to an acidic bleaching stage.