Disclosed are processes whereby stains on a variety of substrates may be removed by treating a stained area of a substrate with a solution of a sulfonamide compound. When it is determined that the received drawing instruction is not the instruction which needs the arithmetic operating process with the background portion, the drawing instruction is converted into a drawing command and transmitted to a printing apparatus, and the received drawing instruction is stored as intermediate data. The electronic module is mounted to at least one of the lens module and the image sensor module. In one form, sutures, a needle and two small blades come in a modular unit that is attached to a main piece.