A white key for a keyboard instrument, which makes it possible to improve yield and marketability and reduce manufacturing costs. The system comprises a performing network and frequency time-sharing andor orthogonal frequency-division multiple access. Up to four printing inks are printed in the edition printing process during color separation for the edition printing process by GCR and CCR application. An isolating wall part is provided between the contacting part and the movable contact part to isolate a contact area between the movable contact part and the fixed terminal, from the contacting area between the contacting part and the memory card. The original identifying data may also be stored andor transmitted to allow accurate reconstruction of the original views.