Changing the Shape of Hair 186 was a good indicator of depilatory activity. The reproducibility of T 95 data for the two depilatory systems tested are illustrated in Table 4, while Table 5 gives T 95 times for some of the systems tested by this method. Table 4 Reproducibility of T 95 data System Average T 95 (min) Standard Deviation n Cream B 5.9 1.2 22 0.5 NaTGA pH 11.5 8.1 1.2 14 Table 5 T 95 times for selected reducing agents Reducing Agent* pH T 95 (min) NaTGA 10.5 14.0 NaTGA 11.5 8.0 NaTGA 13 4.5 Saturated BaS 13 5 * All treatments at 0.5M except saturated BaS Figure 18 SFTK curves for two commercial depilatories.