This article begins a series of short descriptions of sign material in order to help consumers choose between a large number of substrates for their signs. I have already discussed vinyl and magnetic materials in some detail in previous articles. Therefore, I will focus on coroplast, acrylic (Plexiglas), MDO Signboard, alumalite/alumacore, PVC, and aluminum.

One of the largest selling substrates is coroplast. The name comes from the leading manufacturer of these polypropylene sheets