The double plate in vitro SPF test method (ISO23675:2024) is a reliable means of measuring the performance of sunscreen products with high concentrations of zinc oxide and inorganic-only UV filters
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Sunscreen products and cosmetics containing UV filters are chosen by consumers based primarily on their Sun Protection Factor (SPF) value. The determination of this metric has been subject to significant advancement, both in vivo (ISO 24444:2019) and, more rec... ...
