ASTM D4956-16a

1.1 This specification covers flexible, non-exposed glass bead lens and microprismatic, retroreflective sheeting designed for use on traffic control signs, delineators, barricades, and other devices. This specification covers the performance of retroreflective sheeting materials and does not specifically address inks, overlays, or other imaging methods that may be applied to retroreflective sheeting material to create traffic signs or other devices.