A color-image forming device is provided with: a color-image forming unit for forming a color image by superimposing a plurality of images corresponding to a plurality of colors onto a recording medium. The vendor forwards the purchase request and the mobile subscriber identification data to a security device. The rack plate assembly is configured to be secured to the rack. The apparatus for applying the ultraviolet substance is preferably a \u201cbait station\u201d within which an attractive substance is placed and surrounded by the fluorescent substance. In the preferred embodiment, the wireless receiver unit includes an optional frequently switch, a mode switch, that allows the user to select different frequencies that matches the frequency used by the motion detector. The polishing slurry having a high metal-polishing rate, reducing etching rate and polishing friction, results in the production, with high productivity, of semiconductor devices reduced in dishing and erosion in metal wiring.