| 摘要 |
PURPOSE:To obtain the sufficient optical density by incorporating a specified compd. in at least one layer of photographic constituting layers. CONSTITUTION:The titled material contains the compd. shown by formula I in at least one layer of the photographic constituting layers. In formula I, Z<1> and Z<2> are each an atomic group necessary for forming a 5 or 6 membered heterocyclic ring contg. nitrogen atom, said heterocyclic ring may be substituted, and the heterocyclic ring may be bonded together with an another ring such as a benzene ring or a naphthalene ring. A substituent group which is substituted with the heterocyclic ring is not specified, and however, is preferably the substituent group which is not a hydrophilic substituent group such as OH, NH2, COOH or SO3H, etc. And, the total carbon numbers of the substituent group is preferably <=8. Thus, the image having the sufficient optical density is obtd. |
