Color fastness is one of the most important quality attributes of any dyed fabric. It measures how well a color resists fading or bleeding under washing, light exposure, rubbing, and perspiration.
Common tests include ISO 105-C06 (wash fastness), ISO 105-B02 (light fastness), and ISO 105-X12 (rubbing/crocking). Results are graded on a 1–5 scale, with Grade 4 or above generally considered acceptable for apparel.
For swimwear and performance fabrics, chlorine and salt-water fastness matter even more than standard wash fastness. Always specify the intended end use when requesting testing — a color that passes a standard test may still fail in your application.
At our in-house quality lab, every production batch is tested for color fastness before shipment, and test reports are available on request.
