What is measured by the “Colorfastness to Light” test?

The “Colorfastness to Light” test specifically measures the resistance of the fabric's color to fading when exposed to light. This is crucial for evaluating how well a fabric will hold its color over time, especially when utilized in environments where it may be subjected to sunlight, such as in home furnishings or clothing. Fabrics that score well on this test are more likely to maintain their visual appeal and integrity over extended periods of use and exposure, making them more desirable for consumers and manufacturers alike.

Understanding this property is important for fabric selection in various applications, particularly for items that will be displayed or worn outdoors. The other choices address different characteristics of fabric, such as durability or moisture-related qualities, but they do not pertain to the specific focus of colorfastness with respect to light exposure.