Method and an apparatus for producing color separations for single color printing

摘要

A method and apparatus for producing color separations for single color printing in electronic reproduction, for example in textile, decorative, or packaging printing. A colored master is optoelectronically scanned point-by-point and line-by-line to obtain color signals. Color recognition signals which identify the different colors of the master during scanning are produced from the color signals. Further corrected color separation signals are obtained from the color signals. The corrected color separation signals are controlled by selected color recognition signals representing selected colors of the master. The color separation signals are switched on by the color recognition signals when the corresponding colors in the master are identified, and are switched off when the colors are not present. At least two switched on color separation signals form a recording signal which controls the recording of the color separations for the different colors of the master. As a result, the color graduation or the graduated color distribution at the boundaries of the color areas in the color separations are improved such that the boundaries overlap. Due to the overlapping color areas, zones of mixed printing arise in the color separations. Disturbing color interruptions in the color separations are thus avoided.