Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)
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SS-EN ISO 18861:2021
Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)
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This document specifies a procedure for evaluating the water resistance retention percentage, by comparing the sun protection factor (SPF) before water immersion (hereafter referred to as the “static” SPF) and after a fixed period of water immersion (hereafter referred to as the “wet” SPF).
Cosmetics - Sun protection test methods - Percentage of water resistance (ISO 18861:2020)
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