Patent ID: 8850979

Claim:
A printing plate making method for engraving a surface of a recording medium to make a printing plate, the method comprising scanning a recording medium with a light beam at a predetermined pixel pitch, wherein a light power of the light beam engraving all or part of an adjacent region which is adjacent to a convex portion which is to be left in a convex shape on a surface of the recording medium is controlled such that an integrated exposure energy in all or part of an adjacent region due to the exposure by the light beam is reduced so as to be equal to or less than the value of a threshold engraving energy, at the upper surface of the convex portion, and the light power of a light beam for engraving a vicinity region in the vicinity of an outer side of the adjacent region is controlled such that an integrated exposure energy in the vicinity region due to the exposure by the light beam is increased to a value equal to or higher than the integrated exposure energy in the adjacent region.