This study consist of two steps. Step 1: determination of the SPF of the test products which will be performed as a single-center, randomized, evaluator blind, intra-individual comparison, no treatment and positive controlled clinical study as per ISO24444:2010. And Step 2: determination of the UVAPF of the test products which will be performed as a single center, open-label, negative and positive controlled technical test as per ISO24443:2012 (using test plates for assessing UV transmittance of four developmental sunscreens).
The purpose of this study is to determine the SPF and UVAPF of four sunscreen formulations using international standard methodologies ISO24444:2010 for SPF and ISO24443:2012 for UVAPF.