It has been shown through a handful of studies in the last decades that the homogeneous or localised nature of the cellulose depolymerisation taking place within fibres when subject to various treatments (pulping, bleaching, aging…) is the driving factor regarding fibre strength deterioration, rather than the cellulose average degree of polymerisation (DP). Here, a fully-bleached hardwood kraft pulp has been depolymerised with various chemicals to two DP levels: from initial DP 1370 down to 1150 and 850. Differences in MMD shapes only appear at the lower DP level, while giving no clear indication on the topochemistry of the degradation due to opposite mechanisms affecting cellulose peak dispersity.