In 1955, with the business flourishing, it was moved to Harrison, Arkansas, due to proximity to the railroad and the quality of the labor market. Eight employees made up the original Harrison workforce in one 20,000 square foot building. In 1956, the sales office was moved from Chicago to Harrison as well.
The original Claridge chalkboards were made from slate, but transitioned to Duracite, a chalkboard surface painted and baked into hardboard. In the late 1950s, porcelain enamel steel chalkboards were developed and in 1962, with help from DuPont, Claridge developed a technique called Vitracite, a process that used aluminized steel with a fired-on opaque glassy coating. In 1962, Claridge Extrusion was opened to provide a reliable source of extruded aluminum for trim and other chalkboard elements. Ten years later, the wood shop was created.