Contribution to the quantification of the conditioning effects of hair dyes

Synopsis Apart from the problem of colour, the cosmetic properties of hair after dyeing play a vital role both for the cosmetic chemist and the user. A methodology for a quantitative assessment of these conditioning effects is proposed. This methodology is based on a realistic approach to the protocols, and uses original apparatus and accessories which take the particular context of the dyeing process into account. Particular importance is given to studying the length of set hold and the ease of combing. Big differences were observed between three dyes on sale on the market, including their finishing treatment products such as shampoo or rinse.