| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for evaluating an image by which the situation of the plate making conditions of a negative type image forming material for an IR laser for direct plate making is easily judged and a quality control method for keeping the quality of a planographic printing plate uniform by feeding back the results to a developing step. SOLUTION: The quality control method has (A) a step for producing a control by forming a solid image area and a non-image area in a negative type image forming material with a photosensitive layer containing an IR absorber, a compound which generates a radical or an acid under heat and a polymerizable or crosslinkable compound on the base and developing the image forming material with a standard developing solution, (B) a step for producing a target planographic printing plate by developing the image forming material in the same way with the exception of development with a developing solution to be evaluated, (C) a step for comparing the image or non-image areas of the control and the planographic printing plate and (D) a step for adjusting exposure/heating/development conditions on the basis of the results. |
