Objective To study the possibility of evaluating the water resistance of sunscreen cosmetics in vitro by SPF-290 analyzer and a new substrate - Polymethylmethacrylate(PMMA)plate.

• [目的]研究采用SPF-290分析仪及一种新型载体聚甲基丙烯酸甲酯板对防晒产品的抗水性能进行评价的可行性。