The plastic is laminated into sheets which consists of 2 outer layers of the same color and one inner layer of a contrasting color. When the top layer is routed (or carved) away into the middle layer the contrasting color is exposed. HDPE plastic sheets have a 1/8" top and bottom layer, and a 1/2" middle core layer. This combination of layers provides a consolidated 3/4" panel. All signs are routed by computer technology or cnc routers. When splicing is required, plastic biscuits will be used to "snap" the sign panels together. Splices are used when the sign sizes are larger then the sheets of material.

If part of a sign is background routed, it means that the area around an object or letter is routed away exposing a raised letter or image. These brown letters in the photo are raised letters.