A retroreflective element that exhibits exceptional wet retroreflectivity, and a method of manufacturing the same. The retroreflective element includes an assembly having a multi-sided retroreflector and a clear thermoplastic. In one embodiment, the clear thermoplastic is at least partially...http://www.google.fr/patents/US5835271?utm_source=gb-gplus-shareBrevet US5835271 - Encased retroreflective elements and method for making
Encased retroreflective elements and method for making
