Development of photographic silver halide material

US4038075A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Robert J. Pollet · Vremde, BE
• Francis J. Sels · Kontich, BE
• Camille Angelina Vandeputte · Mortsel, BE

Key dates

• Filing date: Jan 13, 1976
• Grant date: Jul 26, 1977
• Expiry date: Jan 13, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C323/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method is described of developing a photographic silver halide element containing developable silver halide by means of a silver halide developing composition, comprising as development activator a derivative of a polyethylene glycol or a C.sub.1 -C.sub.5 monoalkyl ether thereof corresponding to the formula: EQU R.sub.1 O(CH.sub.2 CH.sub.2 O).sub.n X--A--Y--R.sub.2 wherein PA1 R.sub.1 is hydrogen, C.sub.1 -C.sub.5 alkyl or the group X--A--Y--R.sub.2 PA1 n is an integer of at least 4 PA1 X is CO, SO.sub.2, CONH or, when R.sub.1 is X--A--Y--R.sub.2 may be a chemical monovalent bond, PA1 A is alkylene or arylene, PA1 Y is a sulphur or selenium atom, and PA1 R.sub.2 is an alkyl group.