Stabilised peroxide bleaching solutions and their use for processing of photographic elements

(19)

(11)

EP 0 738 919 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	15.01.1997 Bulletin 1997/03

(43)	Date of publication A2:
	23.10.1996 Bulletin 1996/43

(21)	Application number: 96200947.8

(22)	Date of filing: 15.04.1996

(51)	International Patent Classification (IPC)⁶: G03C 7/42

(84)	Designated Contracting States:
	DE FR GB

(30)

Priority:

17.04.1995 US 422468
17.04.1995 US 423257

(71)	Applicant: EASTMAN KODAK COMPANY
	Rochester, New York 14650-2201 (US)

(72)	Inventors:
	Haye, Shirleyanne Elizabeth Rochester, New York 14650-2201 (US) Reyes, Mayra Beatriz Rochester, New York 14650-2201 (US)

(74)	Representative: Baron, Paul Alexander Clifford et al
	Kodak Limited Patent Department Headstone Drive Harrow Middlesex HA1 4TY Harrow Middlesex HA1 4TY (GB)

(54)	Stabilised peroxide bleaching solutions and their use for processing of photographic elements

(57) Color photographic elements are bleached after exposure and development by using a hydrogen peroxide bleaching solution. This solution comprises a hydrogen peroxide bleaching agent, chloride ions in an amount of at least 0.35 mol/l, a first acidic compound which is an organic phosphonic acid or a salt thereof, and a second acidic compound which is either a 2-pyridinecarboxylic acid or 2,6-pyridinedicarboxylic acid (or a salt thereof), or a polyaminocarboxylic acid having one or more secondary amines at a pH of 8 to 11 (or a salt thereof). The bleaching solution is stabilized by the presence of the two acidic compounds.

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