Importance

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Abstract

To provide a method of preparing a lithographic printing plate comprising exposing imagewise a lithographic printing plate precursor including a support, a photosensitive layer containing a binder polymer and a radical polymerizable compound having viscosity of 9,000 mPa·s or less at 25° C. and a protective layer in this order and developing the exposed lithographic printing plate precursor with a developer without passing through a heat treatment, as a method of preparing a lithographic printing plate capable of forming an image area which is cured at high sensitivity and has good printing durability and halftone dot reproducibility and capable of easily reproducing a halftone dot image because of excellent stability of halftone dot reproduction to exhibit a small restriction on setting of the time described above, even without conducting a preheat treatment.

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First Claim