Chapter 8 273 Table 6. Survival Probability results for Caucasian hair at 60% RH as a function of the applied repeating stress and illustrating the influence of the applied force Conditions Stress Probability of surviving 1,000 cycles Probability of surviving 5,000 cycles Probability of surviving 10,000 cycles 52.0 g force on a 70 μm fiber 0.0135 g/μm2 62% 7% 4% 48.1 g force on a 70 μm fiber 0.0125 g/μm2 82% 43% 21% 44.3 g force on a 70 μm fiber 0.0115 g/μm2 90% 70% 54% 40.4 g force on a 70 μm fiber 0.0105 g/μm2 96% 83% 72% 36.6 g force on a 70 μm fiber 0.0095 g/μm2 98% 94% 90% Table 7. Survival Probability results for Caucasian hair at 60% RH as a function of the applied repeating stress and illustrating the influence of fiber dimensions Conditions Stress Probability of surviving 1,000 cycles Probability of surviving 5,000 cycles Probability of surviving 10,000 cycles 30g force on a 63.4 μm fiber 0.0095 g/μm2 98% 94% 90% 30g force on a 60.3 μm fiber 0.0105 g/μm2 96% 83% 72% 30g force on a 57.6 μm fiber 0.0115 g/μm2 90% 70% 54% 30g force on a 55.3 μm fiber 0.0125 g/μm2 82% 43% 21% 30g force on a 53.1 μm fiber 0.0135 g/μm2 62% 7% 4% The same procedure can be applied to data obtained for virgin Afro hair under the same humidity conditions. Results are shown in Table 8.