The disclosed invention relates generally to sizing compositions, methods and apparatus for cleaning sized fiber glass strands, yarns and fabric without the use of high temperature thermal processes. The locking mechanism is positioned either at a locking position or at a non-locking position. The first amplifier amplifies the first input signal and the first filtered signal to thus generate a first amplified signal. The first polarizer, the first liquid crystal display panel, the detachable polarizer, the second liquid crystal display panel, and the second polarizer are disposed sequentially from the light emitting side.