A system is provided for the on-board production of reductants. The printed material includes an image of an original, and an additional image not recognized or hard to be recognized with naked eyes. Thus, a single FFT module can be used to transform a first type of signal and a second type of signal if configured according to the technique. and low crystallinity, which provide thermal stability to the organic EL devices. The flexure tongue prevents the microactuator from contacting the load beam when the HDD receives a mechanical shock.