In order to retain high viscosity levels of hemp pulp, the conditions of the oxygen delignification and bleaching processes of these pulps were modified. This modif ication consisted in the introduction of a Q stage before the oxygen delignification of the pulps, increasing the amount of MgSO4 (an inhibitor of cellulose depolymerisation) added at the O2 stage to 0.5% on oven-dried pulp and the removal of hydrogen peroxide at the EP stage.