Single component non-magnetic development systems are widely used in desktop laser printers because of their low cost, small size and color application. In general, there are two kinds of single component non–magnetic development system. One is contact type development system, and the other is non-contact type single component development system.In recent years, the resolution in digital printing has been increasing, in response to high image quality. However, it is very difficult to form dots and single lines of high resolution in contact type development system because of the weak electric fringe field. To enhance electric fringe field for high resolution, some range of the gap between the developing roller and the photo conductive drum must be required. As a result, non-contact type single component development system is very useful to form high resolution of single dots and lines.We have designed non-contact type single component non-magnetic development system to improve the sharpness of image and to achieve high photo quality by experimental design method. We performed experiments using 1200 dpi resolution with parameter values obtained through the optimization process.