An electrophotographic printing control apparatus serves for transferring an image via an electrically biasable ITM drum to a conductive substrate. The urinal includes a plurality of air chambers, held together by seams, which inflate to form an elongated and continuous urinal. The panels are quarto folded to form a substantially rectangular main body of the coupon with the flaps combining to form a grippable closure tab along one edge of the body, which can be torn off to open the coupon. Trenches are formed in the optical coating. A hardware sandbox structure is provided for security against the corruption of data among the programs being processed by the processing units. An increment or decrement of the effective voltage value may be due to i) at least either a blunt waveform or induced distortion of the signal voltage or ii) at least either a blunt waveform or induced distortion of the scanning voltage, or iii) both.