COLOR PROOF PREPARATION METHOD AND COLOR PROOF PREPARATION DEVICE

摘要

PROBLEM TO BE SOLVED: To prepare a color proof in which a black-only part and a black overprint part are discriminated. SOLUTION: This device for preparing the color proof by exposing a silver salt color photosensitive material by a plurality of light sources of different wavelengths on the basis of halftone dot image data, is provided with a data conversion means 205 for correcting gradation characteristics or tone characteristics for the image data of CMYK, performing the correction of lowering K by a prescribed ratio corresponding to the value of K and the minimum value of one of CMY in the case that K is equal to or more than a first boundary value and the minimum value of one of CMY is equal to or more than a second boundary value for the CMYK after the correction and preparing and outputting the halftone dot image data of a halftone dot area rate on the basis of the image data of the CMYK for which the correction of K is performed.