BLACK-AND-WHITE PHOTOGRAPHIC PRINTING MATERIAL FOR PRINT
PURPOSE:To obtain a black-and-white photographic printing material for the print without any fogging and having a stabilized photographic characteristic from the production until the material is preserved for a long period by specifying the compd. incorporated in an emulsion layer. CONSTITUTION:A co...
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Zusammenfassung: | PURPOSE:To obtain a black-and-white photographic printing material for the print without any fogging and having a stabilized photographic characteristic from the production until the material is preserved for a long period by specifying the compd. incorporated in an emulsion layer. CONSTITUTION:A compd. expressed by the formula and a water-soluble polymer having a carboxyl group and =2 hetero atoms such as O, S, Se and N atoms and is a 5 and 6-membered heterocylclic rings with which a benzene ring or a naphthalene ring can be condensed. Oxazole, thiazole, selenazole, imidazole, tetrazole, triazole, pyrimidine and their benzo- and naphtho-condensates are exemplified as the heterocyclic ring. |
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