A fine feldspathic earthenware including a body and a glaze layer covering surfaces of the body. The method is well suited to the production of TFTs for use as drivers on liquid crystal display devices. The heater is positioned so that heating of the actuator results in differential thermal expansion of the actuator to generate movement and subsequent ejection of ink. The method may also involve arranging the negative electrode, which is formed by a compressed second powder, to a carrier arranged within the biplate assembly. The first derivative function of the smoothed spectral transmittance function is determined. The quinoline derivatives have a backbone structure of the following formulas:.