Flex-O-Lite’s 831® formulated glass spheres offer the optimal index of refraction for maximum retroreflectivity while using exposed glass beads. No other glass bead can match the exceptional physical properties of 831® glass. Manufactured in a wide variety of sieve sizes, Hi-index glass beads are available to meet every need.
Federal Specification Airfield Glass Beads- TTB-1325C Gradation A Type III Hi-Index is specified by the United States Government to offer the best possible retroreflectivity for both the military forces and general aviation.
831® Sign Beads- Hi-index sign beads are used to provide reflectivity to a variety of items including signs that do not use encapsulated sheeting. Hi-Index glass beads can be screened exclusively to meet your specification and/or application need.
