The interior of the sign presented the most difficult design and molding challenge. Like the taillight of a car or a bicycle reflector, the sign is retroreflective to make the most use of all light that strikes it. Numerous, precisely engineered and molded cube corners, or reflects, line the inside of the sign's face. Light that strikes these cubes is reflected away from the sign at an angle equal to the incidence angle. Any light that penetrates past the cubes hits the rear of the sign, which reflects the light back into the cubes and the plastic lens.
Light can also enter the sign from the clear edge or the translucent back.
As a result, the sign is illuminated by sunlight during the daylight hours and by automobile lights, streetlights and other sources of illumination at night. We believe this is one of the world's largest retroreflective parts formed via injection molding. The molds for the face and back of the sign were developed by ALLSign Products' partner in developing the stop sign, Hallmark Technologies, of Windsor, Ontario, Canada, using proprietary mold-making technology. One of the world's top producers of automotive reflects, Hallmark is an expert in crafting molds with retroreflective cubes featured in the All-Sign product. JFJ Mold Processors Limited, of Old Castle, Ontario, Canada, uses the Hallmark Technology's-developed film insert molding and two colors of resin to mold the face of the sign in two shots.