9. Photo-patch test on humans
This test has been developed to confirm the absence of photosensitizing potential of a substance or mixture, after repeated application under a dressing and exposure to UV light.
The duration of the study is six to eight weeks. The test is carried out under the supervision of a dermatologist.
The test has not been validated by the OECD, but is often used in cosmetics as an alternative to animal testing.
The product is applied under an occlusive or semi-occlusive dressing (depending on its composition) for 24 hours on the volunteers' backs, twice a week for three consecutive weeks.
UV exposure at a slightly erythematogenic dose is performed after each dressing removal....
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Photo-patch test on humans