20 AFU & 5 AFU Blue Wool Lightfastness Standard (L2, Lot 9) specimens to calibrate and verify lightfastness testing as specified in applicable AATCC Test Methods.
20 AFU & 5 AFU Blue Wool Lightfastness Standard (L2, Lot 9) specimens to calibrate and verify lightfastness testing as specified in applicable AATCC Test Methods.