Method for developing an exposed photographic silver halide material

US6379877B1 · kind B1 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Freddy Henderickx · Olen, BE
• Ann Verbeeck · Begijnendijk, BE
• Pascal Meeus · Mortsel, BE
• Hieronymus Andriessen · Beerse, BE

Key dates

• Filing date: Jan 31, 1996
• Grant date: Apr 30, 2002
• Expiry date: Nov 1, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C8/365
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

According to this invention a developer has been disclosed having a low pH value between 9.6 and 11.0, preferably between 9.6 and 10.3, and comprising hydroquinone in an amount from 0 to less than 30 g per liter, an auxiliary developing agent, and as silver halide complexing agents alkali metal sulphite salts, preferably sodium salts, in an amount from 0 to less than 50 g per liter, more preferably to less than 40 g per liter, and thiocyanate salts in amounts from 0.1 to 3 g, more preferably from 0.5 to 2.5 g per liter, and at least 1 g of a compound corresponding to the formula (I), a precursor thereof, a derivative thereof and/or a metal salt thereof whereineach of A, B and D independently represents an oxygen atom or NR1;X represents an oxygen atom, a sulphur atom, NR2; CR3R4; C═O; C═NR5 or C═S;Y represents an oxygen atom, a sulphur atom, NR′2; CR′3R′4; C═O; C═NR′5 or C═S;Z represents an oxygen atom, a sulphur atom, NR″2; CR″3R″4; C═O; C═NR″5 or C═S;n equals 0, 1 or 2;each of R1 to R5, R′1 to R′5 and R″1 to R″5, independently represents hydrogen, subsituted or uns…