2010 TRI/PRINCETON CONFERENCE 221 Table XII Measured Combing Force (grams) Subject A 1st Combing 2nd Combing 3rd Combing Average Blue 10.0 15.0 13.0 12.6 Yellow 25.0 19.0 15.0 19.6 Red 30.0 13.0 13.0 18.6 Green 40.0 38.0 30.0 36.0 Black 12.0 13.0 15.0 13.3 Subject B 1st Combing 2nd Combing 3rd Combing Average Blue 25.0 13.0 15.0 17.6 Yellow 29.0 20.0 10.0 19.6 Red 30.0 28.0 20.0 26.0 Green 45.0 40.0 35.0 40.0 Black 25.0 15.0 10.0 16.6 Subject C 1st Combing 2nd Combing 3rd Combing Average Blue 10.0 12.0 10.0 10.6 Yellow 15.0 10.0 10.0 11.6 Red 15.0 25.0 20.0 20.0 Green 22.0 24.0 25.0 23.6 Black 30.0 23.0 30.0 27.6 Subject D 1st Combing 2nd Combing 3rd Combing Average Blue 10.0 10.0 12.0 10.6 Yellow 35.0 22.0 25.0 27.3 Red 15.0 15.0 10.0 13.3 Green 43.0 40.0 35.0 39.3 Black 20.0 10.0 13.0 14.3 Subject E 1st Combing 2nd Combing 3rd Combing Average Blue 27.0 16.0 10.0 15.0 Yellow 40.0 20.0 20.0 26.6 Subject E 1st Combing 2nd Combing 3rd Combing Average Red 20.0 20.0 12.0 17.3 Green 38.0 40.0 45.0 41.0 Black 23.0 20.0 15.0 19.3 Table XIII Average Values of Combing Force (grams) Tress color Total score Blue 13.20 Yellow 17.02 Red 19.04 Green 35.98 Black 18.22 that there is no net positive charge of the hair, due to the fact that the anionic and cationic in combination have a new zero charge. This is not to be confused with no deposition. Instrumental dry combing analysis of human hair tresses treated with aqueous quat solutions

JOURNAL OF COSMETIC SCIENCE 222 confi rmed conditioning, showing that quat MMM indeed performed the best, followed closely by MMG, polyquaternium 10, and the negative control. Again, quat DMG did not show any improvement in performance. Quat AMB concluded to be the poorest performer yielding opaque surfactant mixtures at low levels. Foam height and stability was dramatically suppressed. Although AMB was substantive to human hair when delivered from an aqueous solution, no substantivity was observed from an anionic mixture. Quat MMM concluded to be the best performer, yielding a thick, translucent gel with a viscos- ity well over 10,000 cps for both SLS and SLES titrations. MMM/anionic solutions produced an above average foam height without suppression and extended foam stability well over 24 hours or, ten times greater than SLS and SLES, controls, and positive controls (polyquaternium 10 and SLS/SLES). MMM performed equally as well in substantivity tests when delivered from an aqueous system. Like all other quat solutions, no substantivity was observed when delivered from an anionic mixture. Because of its performance, MMM was chosen for subjective and combing analysis. Like quats DMG and MMG, quat MMM performed poorly in the wet comb- ing test. However, it did perform slightly better in the dry combing test. Quat MMM turned out to perform slightly better in the dry combing test. Quat MMM turned out to perform the best in the instrumental analysis of combing force. The average performance of quat MMM was superior to all quats in this study, including the positive control, polyquaternium 10. Figure 1. Positive and negative controls for 0.5% quat solutions.