Color Fastness to Light｜ISO 105 B02 & AATCC 16 Option 3

Color Fastness to Light

ISO 105 B02 and AATCC 16 Option 3 are the most common standards for assessing how a fabric reacts when exposed to sunlight.

Fabric is placed under a Xenon Arc Lamp, which mimics natural sunlight. In the case of AATCC 16 Option 3, a strip of fabric is placed in a fadometer and exposed to accelerated fading units (AFU) for 40 hours.

These tests are especially important for outerwear and for determining whether a garment can withstand everyday drying on a washing line in the sun.

How colorfastness to light is tested: