In the context of home and personal care products, studying surfactant and mixed surfactant adsorption ion model solid surfaces, which mimic real surfaces such as fabrics, hair and skin, are beginning to provide real insights into their applications in detergency, conditioning and lubrication. The outer surface of hair, the cuticle, is a mixture of proteins (keratin) and covalently attached fatty acid, 18-methyleicosanoic acid, 18-MEA; and surfactant adsorption on to that surface is key to conditioning and lubrication. We request NR beam time to probe the nature of 18-MEA surfaces prepared by L-B deposition, and to investigate the adsorption of model anionic, cationic and nonionic surfactants onto that model surface.