Chapter 8 289 outlined during the single fiber work, it appears instinctive that the highest incidence of breakage in repeated grooming experiments would occur near the hair tips. That is, one would expect a higher number of flaws in this region due to the advanced age of the hair, but also it is well recognized that grooming forces are also higher at the ends (see Chapter 15, Figure 4). Therefore, care is needed in performing such experiments to ensure that extremely short fragments (≤ 1–2 mm in length) are accounted for. Indeed, one may suspect the presence of a distribution in the size of the broken fibers, as presumably there is reduced likelihood for finding flaws upon progressing towards the root. In summary, one may expect many more short fragments than long ones. To test this theory, repeated grooming experiments were performed on 20 virgin Caucasian hair tresses at 60% RH, with both the number of broken fibers and their size being recorded. Weibull parameters that describe the formation of differently sized fragments are shown in Table 11, while the models obtained from these results are shown in Figure 29. Figure 29. Models for repeated grooming data relating the size of broken fragments