In this study, we investigated the hair-color`s changes of healthy hair and various damaged hair, which treated from chemical product, by irradiation UVA or UVC in air. △E of healthy hair and various damaged hair by irradiation with 254 nm or 350 nm...
In this study, we investigated the hair-color`s changes of healthy hair and various damaged hair, which treated from chemical product, by irradiation UVA or UVC in air. △E of healthy hair and various damaged hair by irradiation with 254 nm or 350 nm lamp was increased according to irradiation time. The V-HR, C-HR, BSC-HR and RSC-HR coated sunscreen agent by irradiation with 254 nm lamp didn`t get the effect of the sunscreen but could get the effect of the sunscreen by irradiation with 350 nm lamp in air. The reason of this result is different from absorbent wavelength of sunscreen products. The sunscreen effect of B-HR coated with sunscreen agent by irradiation with 254 nm and 350 lamp could obtained.