美国AATCC协会-耐光试验蓝色标准布L2，L4号

L2，L4(50 cm X 70 cm or 19.7 "X 27.5")Blue Wool Lightfastness standards are Wool fabric used to calibrate and verify testing equipment during Lightfastness testing as specified in AATCC Test Method and Colorfastness to Light

符合标准:AATCC 16等