For this attempt at unveiling the link between cellulose DP and fibre strength, the wet zerospan tensile index was chosen as a representation of single fibre strength and performed on never-dry pulp samples. All the zero-span results have been plotted against either DPv or deconvoluted DPw(C) for the cellulose fraction (Figure ). As expected, the two cellulasetreated pulps Fb-C cell and Fb-C endo fibre strength was significantly reduced despite a mild DPv loss, due to the localised nature of the degradation at the macro level. Overall, trends encompassing most data points were observable.