The invention provides a device for identifying a person or an object. The composite signal is transmitted and a corresponding composite signal received on a communication channel having varying characteristics. In one application, a substrate has a fold line formed by alterations to the substrate material to form a fold line on the substrate. Once all of the legs are supporting a minimum amount of weight, all of the finger members are released from the support base thereby allowing elevation of the support platform. The green foliage coloration contrasts nicely with the yellow blossoms. This process produces a thickened sludge having a concentration greater than 10 gml.