In Vitro Rub Resistance

Consumers now require traditional sun protection with improved esthetics and added benefits including water resistance and other resistance factors. Following this need, HelioScreen developed a new in vitro UV method to reliably determine the rub resistance of sun care products. The resulting Rub Resistance Factor indicates whether a sunscreen is still effective after being rubbed with a textile (towel, cloth, etc.). This new in vitro test is also marketable, and provides a strong label claim for sunscreen manufacturers to make on sun care products.