Possibly get free Redken samples for taking their survey. If you are selected, you will be sent two sample products to try out.
From the site: Redken Laboratories, founded in 1960, is a company built from the inspiration of a dynamic, entrepreneurial American actress named Paula Kent.
Frequent chemical services and style changes were routine for any aspiring actress of her day, but Paula was extra sensitive to many of the products used by the hairdressers and make-up artists. She felt continually frustrated that no one could explain why the products were irritating. Necessity is the mother of invention, and Paula realized that working with professional hairdressers, she could help millions of other people also wanting high performance products that were gentle.
