Light Fastness Standards Fabric.
Blue wool fabric (pack of 8 graded 1-8) to meet ISO/BS standards. Dimensions each piece 240mm (9 1/2”) x 150mm (6”).
These are a series of 8 wool fabrics dyed with specified blue dyes to give blue wool cloths ranging from very low light fastness to very high light fastness. This forms a numerical scale of 1 to 8 where 1 has the poorest light fastness, to 8 which has the best light fastness. This allows fabrics to be graded, using a Grey Scale for Change in Colour, for correlation with performance in use. They are used in the ISO 105 B series of tests.
耐光色牢度标准织物：
蓝色羊毛织物(8片/包,1~8级)，符合ISO/BS标准.每片尺寸: 240mm(9 1/2英寸) X 150mm (6英寸)。NO.1~NO.8系列产品是经过用指定的蓝色染料染，使其成为蓝色羊毛织物，按耐光性由低到高排列。它们形成了从1到8的顺序系列，1表示具有最低耐光性，8表示具有最高的耐光性。这使得可以用一种变色灰卡来对织物可进行等级划分，从而说明使用中的织物的性能差别。它们用做ISO 105 B系列耐光色牢度试验的标准织物.
