The Root of the Problem

Problem: Yellowing

Ultraviolet light is the culprit behind yellowing of a coating. "Yellowing is a problem that may occur when a finished product is exposed to unusual amounts of ultraviolet light such as close exposure to fluorescent light, or storage near a large window where sunlight passes through, or in an exterior application where there is an exposure to sunlight," Newell said. "In these instances, the ultraviolet light advances the aging of the coating and results in a yellowing appearance to the printed substrate that cannot be reversed."