| abstract |
It is an object of the present invention to provide a color development composition which has excellent color development capability and does not significantly discolor after aging using a color development composition containing a compound represented by formula (1) (in the formula, signs of Individual references are as described in the descriptive report) and a lithographic printing plate precursor containing the color development composition in an image recording layer. In addition, it is possible to provide a lithographic printing plate precursor with excellent visibility through color development, is able to maintain excellent visibility even after aging, exhibits favorable machine development capability, has excellent stability in white light, and also It is favorable in terms of print strength and tone reproducibility and a method for producing a lithographic printing plate in which the lithographic printing plate precursor is used. In addition, it is possible to provide a color development compound with excellent color development capability and does not significantly discolor after aging. the compound represented by formula 1 has at least one of the groups represented by formulas (2) to (4) (in the formula, individual reference signs are as described in the specification) as r4 or r5 or in r1, ar1 or ar2. |