PROBLEM TO BE SOLVED: To provide a method for accurately evaluating ultraviolet protection performance of an ultraviolet protecting cosmetic.SOLUTION: A method for evaluating an ultraviolet protecting cosmetic comprises the steps of: 1) measuring the distribution of ultraviolet transmission light intensity in a plane direction of a substrate coated with no ultraviolet protecting cosmetic 2) coating the substrate with an ultraviolet protecting cosmetic, and, after the coating, measuring the distribution of ultraviolet transmission light intensity in the plane direction and 3) dividing transmission light intensity at a specific position in the distribution of ultraviolet transmission light intensity after the coating of the ultraviolet protecting cosmetic by transmission light intensity at the same position in the distribution of ultraviolet transmission light intensity before the coating of the ultraviolet protecting cosmetic. By applying this operation to all measurement regions in the substrate, the method calculates the distribution of ultraviolet transmittance in a plane direction of a coating film of the ultraviolet protecting cosmetic.COPYRIGHT: (C)2014,JPO&INPIT【課題】紫外線防御化粧料の紫外線防御性能を正確に評価する方法を提供すること。【解決手段】1)紫外線防御化粧料を塗布しない基板の平面方向における紫外線透過光強度の分布を測定する、2)前記基板に紫外線防御化粧料を塗布し、塗布後の平面方向における紫外線透過光強度の分布を測定する、3)紫外線防御化粧料塗布後の紫外線透過光強度の分布における特定の位置での透過光強度を、紫外線防御化粧料塗布前の紫外線透過光強度の分布における同位置での透過光強度で除する。この操作を該基板における全ての測定領域に対して行うことで、紫外線防御化粧料塗布膜の平面方向における紫外線透過率の分布を算出する。【選択図】図1
