JOURNAL OF COSMETIC SCIENCE 216 RESULTS Quat solutions titrated with sodium lauryl sulfate (SLS) produced higher levels of foam than those titrated with sodium laureth sulfate (SLES). However, the quat solutions that were titrated with SLES exhibited greater foam stability than those titrated with SLS. In some cases the quats titrated with SLES had a half-life greater than 24 hours (1440 mi- nutes), including the control. After running all controls, it can be concluded that the addition of quaternium compound had a negative effect on the foaming capabilities of SLS and SLES. Stock SLS produced a foam height of 600 ml, while the average foam height produced from quat/SLS was around 250 ml. Quat AMB (SLS) produced no foam. Unlike all the other quats that were titrated with SLS, which formed translucent, cloudy, gels at their respective cloud points, quat AMB produced a white, opaque paste. This is evidence that a complex is forming between this quat and SLS. This did not occur when quat AMB was titrated with SLES. Controls for this experiment produced expected results. ARL-4-84A, which contained 1% polyquaternium 10, produced a higher foam height than ARL-4-84B, which also contained 1% polyquaternium 10, but in SLES. This also proved true for ARL-4-84C and Table VII Foam Heights of SLES Titrations Quat Sample Foam heightmax (ml) Foam heightinital (ml) Foam heightfi nal (ml) Foam stability (min) AMB 150 50 100 141.0 AME 250 150 175 1440.0 AMG 350 250 225 240.0 AMM 200 100 150 1440.0 AEB 200 100 150 47.0 AEG 300 200 200 1440.0 CaMB 150 50 125 8.50 CaMG 150 50 125 6.0 DMB 150 50 125 5.5 DMG 200 100 150 75.0 DMM 150 50 125 9.0 MMB 200 100 150 1440.0 MMG 250 150 175 146.5 MMM 300 200 200 1440.0 Table VIII Foam Heights of Controls Control Foam heightmax (ml) Foam heightinital (ml) Foam heightfi nal (ml) Foam stability (min) ARL-4-84A 200 100 100 31.0 ARL-4-84B 200 100 150 1440.0 ARL-4-84C 600 500 350 25.0 ARL-4-84D 450 350 275 180.0

2010 TRI/PRINCETON CONFERENCE 217 D as well, which produced the same results. Based on these test results, SLES produced greater foam stability than SLS, however SLS produced higher levels of foam. Quat AMM and MMM performed superior in SLS and SLES compared to all the samples tested, including the controls. AMM showed superior foaming capabilities, by achieving the greatest foam height in SLS (500 ml), as well as having one of the best foam stabilities in SLES (over 1440 minutes). This stability was roughly ten times greater than all other quats and controls tested, with the exception of AEG, CaMB, MMG, and MMM, which all had foam stabilities of over 1440 minutes. It can be concluded that these quaternium compounds did not have a great effect on the expected foaming capabilities of SLS or SLES, with the exception of AMM and MMM. These two quat solutions increased foam stability by a factor of ten without suppressing foam height. (C) SUBSTANTIVITY (AQUEOUS DELIVERY SYSTEM) PURPOSE Determine the substantivity of quaternium compounds in an aqueous delivery system to human hair. PROCEDURE Test solution: ARL-2-73A1 LOT#: 020604 Stock solution: ARL-2-73A LOT#: 020604 Direct red 80 (Aldrich 365548-25G, LOT#: 04927) Glacial acetic acid (Aldrich 338826-25ML, LOT#: 12405LA) Treatment solutions Name w/w Formula # 35% active quat solution 0.5% ARL-4-85A-N Deionized water 99.5% Control: Polyquaternium-10 RESULTS All quat solutions, with the exception of three (AEG, AMG, CaMG) exhibited cationic substantivity when delivered to hair tresses in a 0.5% aqueous solution (see Table IX, p. 218 Figures 1 and 2, pp. 222, 223). It is likely that these quat solutions did not exhibit substantivity because of their glyceryl groups. However, quat DMG, which also con- tained a glycerly group, did exhibit cationic substantivity. It is also possible that the quat group was damaged, or reacted out somewhere in the study, because they were no longer cationic.