SECURITY MARKINGS IN RETROREFLECTIVE SHEETING

摘要

Retroreflective sheeting includes a first portion of prismatic retroreflective sheeting having a first cube corner structure that creates a first visual feature in the retroreflective sheeting and a second portion of prismatic retroreflective sheeting having a second cube corner structure that differs from the first cube structure and that creates a second visual feature in the sheeting. The second visual feature in the retroreflective sheeting forms a security mark.