Scalp hair: a model for the evaluation of cosmetic formulations intended for depilation

✍ Scribed by Samira Khenniche; Bachir Bouali; Pierre Lanteri

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 301 KB
• Volume: 52
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.1096

✦ Synopsis

Abstract

One of the most expensive stages in cosmetic product formulation is in vivo efficiency evaluation. In the depilation field, work of adhesion (W~a~) estimation using wettability measurements for depilatory wax and leg hair, an in vitro method, has allowed a first formulated product screening, and then the selected formulation showing the best W~a~ has been tested in vivo. Leg hair constitutes a difficult support to study because of its short length and difficulty in selecting samples. The aim and the originality of the work described in this paper is to show, from a morphological and a physicochemical study, that scalp hair roots can be used as a global leg hair model for the estimation of the formulated depilatory wax adhesion. Formulated depilatory wax comparison from W~a~ measurements using scalp hair roots and in vivo tests are correlated, thus validating our global leg hair model.

© 2003 Society of Chemical Industry