Holocellulose fiber and Kraft fiber samples have nearly identical XRD spectra (Figure 4).Calculated crystallinity results are presented in Table 2. Compared to Kraft fibers, holocellulose fibers have similar crystallinity (66%) although they have lower cellulose content (69.2%compared to 76.2%). This means that cellulose fibrils in holocellulose have higher degree of long-range molecular order, suggesting more cellulose degradation occurs during Kraft pulping.It is noted that the estimated crystallinity of 66% in the holocellulose sample with 69% cellulose content cannot be interpreted as having 95% crystalline cellulose.This is because the peak deconvolution method for amorphous fraction estimation is likely to contain some error, which requires further development for holocellulose fiber analysis.