Vapor-permeable retroreflective sheeting.

摘要

Retroreflective sheeting (10) is provided in which a specularly reflective layer (16) within the sheeting has extensive discontinuities (17) which make the sheeting permeable to vapor, thereby allowing release of vapors from a substrate (18) to which the sheeting is applied. In the embodiment of the drawing, the transparent microspheres (11) are supported as a monolayer in transparent binder layer (12), and transparent spacer layer (14) places the spheres at the approximate focal point for light rays impinging on the reflective sheeting and passing through the microspheres to the reflective layer. Top layer (13) forms a smooth top surface and aids in wet reflection.