a color copying machine is provided with a color signal input unit for inputting red , blue and green signals representing the colors of a document , a recording unit for recording the color picture of an original color picture on the basis of printer control signals for controlling a cyan printing by using a cyan toner , a magenta printing by using a magenta toner and a yellow printing by using a yellow toner and a processing unit which changes the color signals including the red , blue and green signals into the printer control signals related to the cyan , the magenta and the yellow by using a matrix representation in conformity with a predetermined rule to produce cyan , magenta and yellow printer control signals . a surface - finishing mode selecting button allows an operator to select either a glazed finish to the recording sheet or an unglazed finish after recording the color picture thereon . the cpu determines one set of parameters to be used by the processing unit from a plurality of sets of parameters stored in the rom according to the selected surface - finishing mode . the processing unit modifies the input color signals by using the predetermined parameters , according to the selected surface - finishing mode , and the recording unit records a color picture on a recording medium . the glazing unit glazes , or finishes , the printed recording medium according to the selected surface - finishing mode .