Shampoo and Conditioner Science 96 a high viscosity and smooth feel upon drying.50 Branched molecules with a silicone core and hydrocarbon branches, or networks formed from these branched units, have been disclosed as suitable for improving sensory feel, while minimizing phase separation and conferring good shampoo removability.51 Shampoos containing more than one cationic conditioning polymer and a quaternary silicone give more uniform deposition on hair than standard shampoos based on polyquaternium-10 as the sole conditioning polymer. Thus, a conditioning polymer “cocktail” comprising poly(acrylamide-co-acrylamidopropyltrimonium) chloride, guar hydroxypropyltrimonium chloride, and silicone quaternium-13 gave uniform deposition on hair. In this instance, the claims are based upon multiple testing and analysis, namely:52 • A multiple attribute consumer assessment study that measured the attributes of cleaning, wet-comb, dry-comb, hair softness, lather amount and creaminess. • Secondary Ion Mass spectrometry to detect silicon on the hair surface. This method revealed that a standard commercial shampoo concentrated silicone on the cuticle edges of the hair, whereas the patent application shampoo “distributed silicone more evenly.” • X-Ray photoelectron spectroscopy (XPS) to measure the thickness of the silicone polymer layer on hair from Si:C:O ratios. This method revealed that the commercial shampoo deposited a significant amount of silicone, and the patent application shampoo deposited only one or two molecular layers. • Instron ring compression as a measure of combability. Complex coacervates can also be formed from mixtures of cationic and anionic polymers. This could be the underlying mechanism in shampoos that include an anionic and cationic polymer that provide sleekness and gloss.53 Two drawbacks of silicones are that they often destabilize foam and the final compositions are hazy due to light scattered from the suspended silicone droplets. Initially, silicone copolyols