One embodiment of the invention provides a method including molding composite panels that are UV resistant, substantially free of fiber readout, and have visible fibers from epoxy compositions comprising resins having aromatic rings. The mechanism uses a plurality of bins for maintaining the number of times that delay values fall within the range of a particular bin. Each piezoelectric cantilever pressure sensor contains an elongate piezoelectric cantilever mounted at one end on the substrate and extending over a cavity. The number of bit-planes is determined based on the largest absolute value. The water-soluble or water-swellable copolymers of the present invention are useful in formulating cosmetics.