本试验方法使用光度计测量纺织品和相关材料的遮光性能。该方法适用于所有类型的织物，包括涂层织物和其他基于织物的结构。

This test method measures the light blocking properties of textile and related materials using a photometer.This method is applicable to all types of fabrics, including coated Textiles and other textile-based constructions.