AATCC L-2 Blue Wool
/ UnitAATCC L-2 BLUE WOOL, 20″ X 32″
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Use Blue Wool Lightfastness Standard specimens to calibrate and verify lightfastness testing as specified in applicable AATCC Test Methods. Measure 20 AATCC Fading Units (AFU) (85 kJ/m2nm @ 420 nm). L2 is approved for use in place of L4 for 20 AFU tests.

**FOR USE WITH L2 LOT 9 ONLY**
This fabric that has been faded to the specified endpoint for a 5 AFU test (or multiples of 5 AFU) as described in applicable AATCC Test Methods.
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