The degraded Fb pulps set showed a curvilinear relationship between zero-span tensile index and DPv while the Ko pulps set trend looked linear (Figures and, respectively). Both Fb and Ko degraded samples followed a linear trend with deconvoluted DPw(C), down to a critical value of ~1300. This is equivalent to DPv 590, hence lower than the 885 value recently reported by . Past this threshold, only the two most degraded samples that had been oxidised by hypochlorous acid showed very low zerospan tensile values: Fb-H(4) and Fb-H(5) (details given in Supplementary file).