AATCC TM16.3 Colorfastness to light: Xenon Arc
The AATCC Test Method 16.3 – Colorfastness to Light: Xenon-Arc is a method used to measure the ability of textiles, colorants, finishes, and treatments to retain color when exposed to light. The test exposes the sample to the UV radiation produced by a Xenon and simulates harsh sunlight conditions. Exposure for 40 hours simulates for the ANSI/ISEA 107 standard a full year of harsh sunlight exposure.
The ANSI/ISEA 107 standard measures both chromaticity and luminance with a spectrophotometer before and after this UV exposure to assure workers are visible in the work zone for the life of the garment.
Measurement is taken on an as-received sample, as well as a sample exposed to 40 AATCC Fading Units under a xenon-arc lamp. The lamp is intended to represent accelerated exposure to light, artificial and natural, in order to gain an understanding of the lifespan of high-visibility color of a textile.
To pass, the spectrophotometric values must fall within the coordinates listed in Table 3 of ANSI/ISEA 107 before and after the xenon-arc exposure. This assures the garment is safe to use in high-visibility safety apparel and accessories and will withstand conditions encountered during wear. Chromaticity and luminance are crucial to ensure the visibility of a garment and, hence, of a person wearing the garment.
Variations of the test can be performed based upon the intended use of the end product.
ANSI/ISEA 107 defines the exposure required that best aligns with high-visibility safety apparel and accessories.