公开(公告)号：US5545508A

公开(公告)日：1996-08-13

申请号：US605248

申请日：1996-02-13

Applicant: Carlo Marchesano ,  Elda Moizo ,  Filippo Faranda

Inventor： Carlo Marchesano ,  Elda Moizo ,  Filippo Faranda

IPC: G03C1/06 ,  G03C5/29 ,  G03C5/30 ,  G03C5/305

CPC classification number: G03C5/305

Abstract: A process for forming a black-and-white high contrast negative photographic silver image by development of a silver halide photographic element with an aqueous alkaline photographic developer composition comprising a dihydroxybenzene developing agent, an auxiliary superadditive developing agent, an antifogging agent, an antioxidant compound, a combination of buffering agents and a sequestering agent, characterized by the fact that: a) the auxiliary developing agent is an aminophenol compound, b) the combination of buffering agents comprises at least a first buffering agent represented by carbonate compounds and at least a second buffering agent represented by phosphate compounds, the total amount of said first buffering agent and said second buffering agent being at least 35 grams per liter, band c) the pH of said aqueous alkaline photographic developer composition is in the range 9.0 to 11.0.

Abstract translation: 通过用含有二羟基苯显影剂，辅助超附加显影剂，防雾剂，抗氧化剂化合物的含水碱性照相显影剂组合物显影卤化银照相元件形成黑白高对比度负照相银图像的方法 ，缓冲剂和螯合剂的组合，其特征在于：a）辅助显影剂是氨基苯酚化合物，b）缓冲剂的组合包含至少一种由碳酸酯化合物表示的第一缓冲剂和至少一种 由磷酸盐化合物代表的第二缓冲剂，所述第一缓冲剂和所述第二缓冲剂的总量为至少35克/升，c）所述碱性水性摄影显影剂组合物的pH在9.0至11.0的范围内。

公开(公告)号：US5629138A

公开(公告)日：1997-05-13

申请号：US581450

申请日：1995-12-29

Applicant: Filippo Faranda ,  Elda Moizo ,  Carlo Marchesano

Inventor： Filippo Faranda ,  Elda Moizo ,  Carlo Marchesano

IPC: G03C5/38

CPC classification number: G03C5/38

Abstract: The present invention provides a fixer composition and a method of processing an exposed photographic silver halide element comprising the steps of developing by means of a developer comprising a silver halide developing agent and treating the developed element with a fixer composition, wherein the fixer composition comprises a silver halide solvent, a sulfite ion source, an aluminum salt hardening agent, a buffering agent, a sequestering agent and an .alpha.-ketocarboxylic acid compound in an amount of more than 2 grams per liter corresponding to the formula:R--CO--COOHwherein R represents a hydrogen atom or an organic group.

Abstract translation: 本发明提供了一种定影剂组合物和一种处理曝光的照相卤化银元件的方法，包括以下步骤：借助于包含卤化银显影剂的显影剂显影，并用定影剂组合物处理显影元件，其中定影剂组合物包含 卤化银溶剂，亚硫酸盐离子源，铝盐硬化剂，缓冲剂，多价螯合剂和α-酮羧酸化合物，其量超过2克/升，对应于式R-CO-COOH其中R 表示氢原子或有机基团。

公开(公告)号：US5578434A

公开(公告)日：1996-11-26

申请号：US440832

申请日：1995-05-15

Applicant: Elda Moizo ,  Carlo Marchesano ,  Andrew Mott ,  Dian E. Stevenson

Inventor： Elda Moizo ,  Carlo Marchesano ,  Andrew Mott ,  Dian E. Stevenson

IPC: G03C5/29 ,  G03C5/30 ,  G03C5/305

CPC classification number: G03C5/30

Abstract: The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.

Abstract translation: 本发明涉及一种不含二羟基苯显影剂的黑白水性碱性照相显影剂组合物，其包含还原酸显影剂和辅助超附加显影剂，其中还原酸显影剂由式（I）表示， ：其中，R 1，R 2，R 3和R 4各自选自氢和基团CH 2 R 5，其中R 5是氢或一价基团，例如 氨基，氰基，卤素，羟基，羧基，磺酰基，烷基，环烷基，芳基。 还描述了形成黑白照相银图像的方法，其包括用所述黑白水性碱性照相显影剂组合物显影卤化银照相元件。