Processing method providing cold blue-black image tone for black-and-white materials having silver halide grain emulsions

US6432625B1 · kind B1 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Ann Verbeeck · Begijnendijk, BE
• Govert De Baecke · Kalken, BE
• Johan Loccufier · Zwijnaarde, BE
• Kathy Elst · Kessel, BE
• Andre Roefs · Herentals, BE
• Freddy Hendrickx · Olen, BE

Key dates

• Filing date: Nov 9, 2000
• Grant date: Aug 13, 2002
• Expiry date: Nov 24, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C2200/03
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method has been described for processing an exposed black-and-white silver halide photographic film material comprising in a hydrophilic light-sensitive layer thereof a binder and silver halide grains being {111} or {100} tabular silver bromo(chloro)iodide or silver chloro(bromo)iodide grains having an average aspect ratio of from 1.2 to 50 and having a silver iodide content of less than 3 mole % based on silver with at least part of it at their grain surface, said method comprising the steps of developing in a developer, fixing in a fixer, rinsing and drying, characterized in that in said developing step the developer comprises an alkali soluble agent having preventing silver dissolution properties, being a mercapto azole compound as presented herein.