ABSTRACT
Hair that is conditioned is in a proper and healthy state. Healthy hair looks shiny, feels soft, is easy to comb and style, and retains body and bounce. This chapter provides guidance to the formulating scientist in selecting cationic and lubricious conditioning agents, as well as other materials found in conditioners. It presents the functional aspects of formulating conditioners, including stability and safety issues that is meant to serve as a basic checklist, while experimental design techniques are advocated in optimizing ingredients and their use levels. The chapter also provides examples from patents and the listings of sources and references to broaden the formulating scientist’s experience and enable him or her to develop conditioner formulations which meet the needs of the target market. Sunscreens are compounds which absorb ultraviolet radiation in the range between 250 and 320 nm, thus protecting the surface of the substrate such as skin or hair, onto which the sunscreen is applied.
