Paula Kent and her hairdresser, Jheri Redding (thus the name "REDKEN") began with three products and an intensive education program for hairdressers about the chemistry of hair and skin. The formulas were developed based on three principles:

Protein technology (since hair is composed primarily of protein)
An acidic pH of 4.5-5.5, complementing the natural pH of the hair and skin
Products recommended exclusively by licensed cosmetologists in professional salons.