Hair Care Product Claims 514 The hair literature teaches that clean, healthy hair results in highest technical shine. Accordingly, it is apparent that the ability for shampoos to remove sebum and product buildup (conditioning and styling deposits) from the hair surface will inherently lead to increased shine. Figure 14 shows an example of experimental findings intended to demonstrate this occurrence. This data was generated by the polarized light method using the commercially available Samba instrument from Bossa Nova Technologies (Venice, CA). Figure 14 shows technical shine results for clean healthy hair, and the exact same tresses after application of a synthetic sebum concoction.4 The hair is significantly dulled by the presence of this material but, as anticipated, washing with two different shampoo formulas markedly reverses this occurrence. Commercially available shine serums generally represent leave-in formulations that predominantly consist of silicone oils. The most abundant ingredient is frequently volatile silicone (cyclomethicone) that coats the cuticle structure to facilitate shine, but also gradually volatilizes to limit an overall oily feel. Figure 15 shows further light polarization results demonstrating the effect of such a product on Figure 14. Ability for shampoos to improve shine via removal of dulling soil