In an image processing device, from an object image, an area reproduced by K component only and having at least a prescribed density is extracted as a gray area to be replaced, and a color of an area neighboring the gray area is extracted. The toothbrush holder comprises a unitary length of wire bent into various figure eight configurations that have a first loop; a second loop and a arcuately-curved portion having a crossover point therebetween. The edge clamps are able to extend around edges of the panel for initial location of the panel against the form boards and subsequent more powerful drawing action to draw the panel into intimate contact with the forming edges of the form boards. , hundreds, of stages arranged in parallel sub-arrays, the clocking conductor is snaked alongside the sub-arrays.