Stabilized peroxide bleaching solutions and their use for proces

Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...

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430943, 430430, 430461, 430488, 430490, 430491, 430493, G03C 700, G03C 544, G03C 518, G03C 526

Patent

active

055500099

ABSTRACT:
Color photographic elements are bleached after exposure and development by using a peroxide bleaching solution. This solution comprises a peroxide bleaching agent, chloride ions in an amount of at least 0.35 mol/l, a first acid which is a which is an organic phosphonic acid or a salt thereof, and a second acid which is a 2-pyridinecarboxylic acid or 2,6-pyridinedicarboxylic acid, or a salt thereof. The bleaching solution is stabilized by the presence of the two sequestering acids.

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patent: 5250402 (1993-10-01), Okada et al.
patent: 5300408 (1994-04-01), Okada et al.
patent: 5460924 (1995-10-01), Buchanan et al.

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