| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-developable photosensitive material superior in effects on preventing reversal imaging due to fluctuation of wavelength caused by difference in the lots of laser beams emitting element, and small in coloring in nonimage parts and superior in reproducibility and small in absorption in the ultraviolet region and an adverse effect on a time necessary for printing on a PS plate. SOLUTION: The heat-developable photosensitive material for near infrared rays exposing is provided with a photosensitive layer containing an organic silver, reducer, hydrazing derivative on a transparent supporting, body and dye containing layer either of between the photosensitive layer and the supporting body or either of the photosensitive layer and opposite surface of the supporting body, and transmittance/absorption spectral of the heat developable photosensitive material has a maximal absorption in a range of 750 nm to 830 nm and a width of absorption wave region of >1/2 of the maximal absorption is 25 nm to 110 nm.
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