146 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS Table I PCL Data From Combing Experiments and Statistics (A) Dry Combing Data Expt. Hair Type/Treatment Mean N PCL{ Statistics ANOVA Friedman K. Wallis 1 O-Oil 1 O-SAC 1 O-SLS 1 O-Bleached 2 Can- Oil 2 Can- SAC 2 Cau-SLS 2 Can- Bleached 3 KI-Oil 3 KI-SAC 3 KI-SLS 3 KI-Bleached 4 KII- Bleach 4 KII-SAC 4 KII-SLS 4 KII-Oil 4 KII-Bleach-Oil 6 6.3 * * 6 9.4 6 11.3 6 22.5 * * 8 5.7 * * 8 13.1 8 14.5 8 26.2 * * 5 1260 * * 5 326O 5 295O 5 334O 5 2140 * * 5 1036 5 899 5 522 5 507 (B) Wet Combing Mean Expt. Hair Type/Treatment N PCL• Statistics ANOVA Friedman K. Wallis 5 O-SAC 8 56 5 O-SLS 8 175 5 O- Bleached 8 210 6 Can-SAC 5 42 6 Cau-SLS 5 69 6 Can- Bleached 5 150 7 KI-SAC no rinse 5 525 7 KI-SAC rinse 10 1265 7 KI-SLS 10 1180 7 KI- Bleached 10 2015 -• Expressed as grams load. * Significantly different from other data of this experiment at tx = 0.05 level. Among the different hair types the O and Can hair provided the lowest combing values for PCL, and KI the highest. We believe the combing results provided by this study (Tables I and II) reflect actual combing on heads because they exhibit the following expected relationships: ß Wet combing work and loads for kinky hair (KI and KII) are lower than the corre- sponding dry combing values, but for O and Can hair, wet combing work and loads are higher than the dry values. These relationships have been demonstrated by Epps and Wolfram (10).

HAIR ASSEMBLY CHARACTERISTICS 147 Table II ACL Data From Combing Experiments (A) Dry Combing Meant Expt. Hair Type/Treatment ACL Statistics• 1 O-SAC 51.1 1 O-OIL 72.3 1 O-SLS 74.5 1 O-Bleached 105.7 2 C-Oil 73.3 2 C-SAC 76.4 2 C-SLS 101.8 2 C- Bleached 140.6 3 KI-Oil 9635 3 KI-SAC 23099 3 KI-SLS 21628 3 KI-Bleached 22168 4 KII-Bleached 19093 4 KII-SAC 10246 4 KII-SLS 7896 4 KlI-Oil 5524 4 KII-Bleached-Oil 5328 (B) Wet Combing Mean:• Expt. Hair Type/Treatment ACL Statistics• 5 O-SAC 487 5 O-SLS 1089 5 O-Bleached 1918 6 C-SAC 289 6 C- SLS 441 6 C-Bleached 1043 7 KI-SAC (no rinse) 483l 7 KI-SAC (rinse) 9499 7 Ki-SLS 10727 7 KI-Bleached 18592 +• Expressed as gm cm work. + :• Analysis by Kruskal Wallis test. * Significantly different from other data of this experiment at ct = 0.05 level. • Indicates no significant difference at ot -- 0.05 level. © Combing work and loads are higher for bleached hair than for other treatments of each hair type. © SAC and oil treatments provide the lowest combing values for each hair type, except for kinky hair where oil is very effective for making combing easier but SAC is not. © Combing loads for several samples of hair from black subjects in another study were between those provided by samples KI and KII. After completing the combing experiments, single fibers were taken from the tresses