ABSTRACT
Hair care in the early part of this century strictly meant cleansing the hair, which simply translated to hair products consisting of alkaline soap. Because of such well-known drawbacks of soap as lack of lathering in hard water, deposition of calcium/magnesium soap film onto the hair shaft, and the general product form, demand for an improved product was high [1]. It was fairly common to use home treatments (e.g., vinegar, beer, lemon juice) to strip the film left by the soap on the hair [2]. In a sense, these were the first conditioning agents.
