Patent ID: 7547105

Claim:
A prismatic retroreflective article comprising: a transparent polymeric body portion having an elastic modulus less than 13×10 8 Pa (1.3 GPa); an optical layer comprising internally reflecting cube-corner optical elements, the optical layer having an elastic modulus greater than 14×10 8 Pa (1.4 GPa) and being coupled to the body portion; and an image layer coupled to the body portion opposite the optical layer, the image layer defining an image having imaged portions and non-imaged portions, wherein the image layer forms an exterior layer of the prismatic retroreflective article in the imaged portions, the image layer including cross-links formed between a polymer resin having hydroxyl functional groups and a cross-linking agent having isocyanate functional groups, the polymer resin comprising at least one of a polyester and a vinyl copolymer.