| 摘要 |
PURPOSE:To obviate the contamination of an image and the generation of stains in a white group part with lapse of time and to decrease fogging so as to decrease desensitization by incorporating a specific compd. into the heat developable photosensitive member and/or image receiving member. CONSTITUTION:The compd. expressed by the formula I is incorporated into the heat developable photosensitive member and/or the image receiving member. In the formula I, Y denotes the nonmetallic atomic group necessary for forming a nitrogenous heterocycle; X denotes a sulfur atom, sulfonyl group, oxygen atom or quaternary nitrogen atom; R denotes a substituent. The heat developable photosensitive material which obviates the contamination of the image and the generation of the stains in the white ground part with lapse of time, has the excellent image preservable property and is decreased in the degradation of the sensitivity and max. reflection density (Dmax) is obtd. |
