96 hours Irritation Patch Test:
The 96 hours (4×24 or 2×48 hours) patch test is aimed to assess the incidence of cumulative skin irritation signs which may be induced by the test product when applied on the skin up to 96 hours.
The test is carried out on healthy subjects under occlusive/semi-occlusive/open conditions, depending on the chemical-physical characteristics and the intended use of the product. Skin reactions (redness and swelling) are assessed by a highly trained assessor (dermatologist) up to 72 hours after patch removal.