Photoprotection Efficacy With Sunscreen Formulas Containing the Cyclic Merocyanine Long-UVA Absorber MCE Under Long-UVA Exposure.

Inclusion Criteria: * Healthy female or male volunteer; * from 18 to 40 years old; * uniform skin color all over on the investigational zones; * skin type III or IV according to the Fitzpatrick classification; * ITA° between 10° and 35° at screening visit with an authorize delta of ± 2° at inclusion visit (D1) (Individual Typologic Angle calculated value); * female of childbearing age using a reliable mean of contraception (for at least three month before the beginning of the study, and throughout the study); * informed about the study objectives and procedures, and able to understand them; * willing and able to fulfill the study requirements and schedule. * All subjects will have to give their written informed consent. Exclusion Criteria: * Female in pregnancy (positive pregnancy-test performed before inclusion) or lactation or without effective contraception ; * having planned U.V. exposure of the investigational zones (sunlight or sunbeds) throughout the study; * having used sunbed or sun exposure of the investigational zones within the 3 months before inclusion; * having sunburn (erythema) on the back; * dermatological disorders affecting the investigational zones (presence of naevi, freckles, excess hair or uneven skin tones, vitiligo, photo-dermatological problems); * history of skin cancer; * history of abnormal response to sun; * presence of recent suntan (according to Investigator opinion) or photo-test marks; * history of allergy, hypersensitivity, or any serious…