纺织品 色牢度试验 第B05部分:光致变色的检测和评定

[中文适用范围]： 将纺织品样本（有色纺织品在光照下变色，但在黑暗中储存时几乎恢复到原来的颜色）暴露在高强度光下的时间比引起永久性变化所需的时间短得多。 暴露后立即使用灰度评估样本颜色的变化。 然后将样本储存在黑暗中并再次评估。 [外文原描述]： A specimen of the textile (coloured textiles which change in colour on exposure to light but which virtually return to their original shade when stored in the dark) is exposed to light of high intensity for a time much shorter than that necessary to cause a permanent change. The change in colour of the specimen is assessed immediately after exposure, using the grey scale. The specimen is then stored in the dark and assessed again.