Process for treating light-sensitive silver halide color photographic materials
AssigneeKonishiroku Photo Industry Co., Ltd.
InventorsSigeharu Koboshi, Isamu Fushiki, Kenro Sakamoto
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Abstract
Process for treating a light-sensitive silver halide color photographic material which comprises removing, after color development of the imagewise exposed light-sensitive silver halide color photographic material, the image silver with a bath containing hydrogen peroxide or a hydrogen peroxide releasing compound in combination with at least one compound selected from the group of lower alkyl aliphatic carboxylic acid, alkylidene diphosphonic acid and an alkali metal salt thereof under the conditions of forming substantially no dye image.
Claims17
A method for processing a light-sensitive silver halide color photographic material which has been exposed to an image which comprises removing, after color development of said exposed light-sensitive silver halide color photographic material, the image silver with a bleach-fixing bath having a pH of between 2.0 and 5.5 and containing (i) hydrogen peroxide or sodium perborate in an amount of 0.05 mole to 3.0 moles/l and (ii) at least one organic acid or salt thereof selected from the group consisting of
- lower aliphatic carboxylic acids having the general formula I or II and alkali metal salts, other than metal complex salts, of said carboxylic acids.
- formula I
- R.sub.1 --COOH
- wherein R.sub.1 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms which may may be substituted with one or more of hydroxyl, alkyl having 1 to 3 carbon atoms and amino radicals;
- formula II
- HOOC--(R.sub.2).sub.n.sbsb.1 --COOH
- wherein R.sub.2 is an alkylene or alkenylene group having 1 to 5 carbon atoms, each of which may be substituted with one or more of hydroxyl, alkyl having 1 to 3 carbon atoms, carboxyl and amino radicals, and n.sub.1 is zero or 1;
- and
- alkylidene diphosphonic acids having the general formula III and alkali metal salts thereof ##STR6## wherein X is a hydrogen atom or hydroxyl, and n.sub.2 is zero or an integer from 1 to 5.
- the amounts of said aliphatic carboxylic acids of the formula I or II and said alkylidene diphosphonic acids of the formula III being 0.05 mole to 3.0 moles/l and 0.01 to 1.0 mole/l, respectively.
Dependencies are inferred from the claim text.