An evaluation method for evaluating the ultraviolet protection effect of a measurement sample applied on a substrate includes a first step of measuring, at predetermined wavelength intervals, a change over time of a spectral transmission spectrum of the measurement sample within a predetermined wavelength range by irradiating light from a light source that includes ultraviolet light, visible light, and infrared light under a predetermined irradiation condition a second step of establishing, based on the change over time of the spectral transmission spectrum, a correlation between a light irradiation time and an erythema effective dose per unit time, which is obtained by dividing an erythema effective dose of the measurement sample by an erythema effective dose per 1 MED and a third step of calculating an in vitro rSPF predictive value for the measurement sample on the basis of a time until a cumulative erythema effective dose, which is obtained through time integration based on the correlation, reaches 1 MED.本發明之評估方法係進行塗佈於塗佈對象構件之測定試樣之紫外線防禦效果之評估,且包括:第1步驟,其藉由預先設定之光照射條件下之包含紫外線、可見光線、及紅外線之光源的光照射,以特定之波長間隔測定特定之波長區域之上述測定試樣之分光透射光譜之經時變化;第2步驟,其根據上述分光透射光譜之經時變化,設定光照射時間與由上述測定試樣之紅斑效應量除以每1 MED之紅斑效應量所得的特定時間單位之紅斑效應量之相關關係;及第3步驟,其根據基於上述相關關係進行時間積分所得之累積紅斑效應量達到1 MED為止的時間,計算上述測定試樣之活體外(in vitro) rSPF預測值。(無元件符號說明)
