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    • 9. 发明授权
    • Photographic silver halide developer composition and process for forming
photographic silver images
    • 摄影卤化银显影剂组合物和用于形成照相银图像的方法
    • US5998110A
    • 1999-12-07
    • US965361
    • 1997-11-06
    • Filippo Faranda
    • Filippo Faranda
    • G03C5/29G03C1/06G03C5/30G03C5/305
    • G03C5/3021G03C1/067G03C5/3028G03C5/305
    • A black-and-white aqueous alkaline photographic developer composition is described which is free of dihydroxybenzene developing agent and comprises a p-aminophenol primary developing agent and an auxiliary superadditive 3-pyrazolidone developing agent, wherein the p-aminophenol primary developing agent is represented by the following formula: ##STR1## wherein R.sub.1, and R.sub.2, which may be the same or different, each represents a hydrogen atom, an alkyl group, or R.sub.1, and R.sub.2 together represent the carbon atoms required to complete a 5-membered saturated ring, R.sub.3 represents a hydrogen atom, an alkyl group or an alkoxy group, n represents 0 or 1, and HX represents HCl or 1/2 H.sub.2 SO.sub.4.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with the black-and-white aqueous alkaline photographic developer composition is also described.
    • 描述了一种黑色含水碱性照相显影剂组合物,其不含二羟基苯显影剂并且包含对氨基苯酚一级显影剂和辅助超加成型3-吡唑烷酮显影剂,其中对氨基苯酚一级显影剂由 下式:其中R 1和R 2可以相同或不同,各自表示氢原子,烷基或R 1,R 2一起表示完成5元饱和环所需的碳原子,R 3表示 氢原子,烷基或烷氧基,n表示0或1,HX表示HCl或+ E,fra 1/2 + EE H2SO4。 还描述了形成黑白照相银图像的方法,其包括用黑白水碱性照相显影剂组合物显影卤化银照相元件。