CHICAGO—Hirotec Inc. introduced a glow-in-the-dark colorant called Perma-Glow at NPE.
The Santa Ana, Calif., firm said Perma-Glow accumulates light from sunlight or indoor lighting and later emits a green or blue glow for as long as 10 hours.
Hirotec claims the product is an aluminum oxide-based material that provides a longer emission glow compared with traditional zinc sulfide/copper materials. It supplies the colorant as a powder or in pellets for compounding. The firm is patenting the product.