You can purchase retroreflective microspheres (also called glass beads) in various quantities, from small craft bags to industrial truckloads. Retroreflective Microspheres - Principles and Operation
The story of buying retroreflective microspheres begins with their invention in by Rudolph Potters , who discovered that dropping hot molten glass created almost perfect spheres that reflected light back to its source. Today, these microscopic beads are the global standard for making roads, signs, and safety gear visible at night by capturing light from headlights and "bouncing" it directly back to the driver. Where to Buy Retroreflective Microspheres buy retroreflective microspheres