本产品为一系列8种经过特殊蓝色染料染色的毛织物，提供从极低的光牢度到极高的光牢度范围的蓝色毛料。它们形成了从1到8的序数系列，1代表最低的光牢度至8代表最高的光牢度。

符合标准：JIS L 0841:2004（Test methods for colour fastness todaylight）

"JIS" Blue Scale-Grade 1  LightfastnessStandard.  Youcan cut it in any size accoding to your needs.size 45 x50cm(1  piece)
“JIS日本标准协会”" 耐光试验蓝羊毛布1级

"JIS" Blue Scale-Grade 2 Lightfastness Standard. You can cut it inany size accoding to your needs.size 45cm x 50cm(1 piece)
“JIS日本标准协会” 耐光试验蓝羊毛布2级

"JIS" Blue Scale-Grade 3  LightfastnessStandard.  Youcan cut it in any size accoding to your needs.size 21.5cm x25cm(4  pieces)
“JIS日本标准协会” 耐光试验蓝羊毛布3级

"JIS" Blue Scale-Grade 4  LightfastnessStandard.  Youcan cut it in any size accoding to your needs.size 21.5cm x25cm(4  pieces)
“JIS日本标准协会” 耐光试验蓝羊毛布4级

"JIS" Blue Scale-Grade 5 Lightfastness Standard. You can cut it inany size accoding to your needs.size 45cm x 50cm(1 piece)
“JIS日本标准协会” 耐光试验蓝羊毛布5级

"JIS" Blue Scale-Grade 6 Lightfastness Standard. You can cut it inany size accoding to your needs.size 45cm x 50cm(1 piece)
“JIS日本标准协会” 耐光试验蓝羊毛布6级

"JIS" Blue Scale-Grade 7 Lightfastness Standard. You can cut it inany size accoding to your needs.size 45cm x 50cm(1 piece)
“JIS日本标准协会”  耐光试验蓝羊毛布7级

"JIS" Blue Scale-Grade 8 Lightfastness Standard. You can cut it inany size accoding to your needs.size 45cm x 50cm(1 piece)
“JIS日本标准协会” 耐光试验蓝羊毛布8 级