The phrase "phosphorescent paint" refers to a type of paint that glows in the dark after being exposed to light. It can be used to make things easier to see in the dark, like safety signs or glow-in-the-dark stickers. Full definition
Later, he produced «Achromes» of other colorless materials: white cotton wool, fiberglass, rabbit skin, and bread, even experimenting with phosphorescent paint so that the «colours» would change over time. (dreamideamachine.com)
Additional components include drawings that sequence through the patterning of dance floor lights and a new series of phosphorescent paintings that translate these sequences into a gridded system. (franklinstreetworks.org)
Later, he produced Achromes of other colorless materials: white cotton wool, fiberglass, rabbit skin, and bread, even experimenting with phosphorescent paint so that the «colors» would change over time. (artspace.com)