In Vitro SPF multi-substrates with irradiation

This test consists in evaluating the Sun Protection Factor (SPF) which expresses the sun protection level of a sunscreen product through the full UV spectrum, using a multi-substrates approach (molded and sandblasted plates) on which the product has been spread and measured by means of a spectrophotometric method. This method allows a higher correlation with in vivo results and the product was UV exposed to take into account any potential photo-unstability.