Color photographic processing method

Claim 2

In a method for developing, bleaching and then fixing an exposed color silver halide photographic material, the improvement which comprises bleaching said photographic material with a bleaching solution containing a ferric salt, then processing the photographic material with a solution containing an organic acid between said bleaching and said fixing, wherein said organic acid is an organic carboxylic acid represented by the General Formula (I) the General Formula (II) or the General Formula (III) r -- coom (i) wherein R represents an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 1 to 6 carbon atoms or a hydroxy and/or carboxy substituted alkyl group having 1 to 12 carbon atoms or alkenyl group having 1 to 6 carbon atoms; and M represents a hydrogen atom, an alkali metal atom or an ammonium group; ##STR5## wherein A represents a hydrocarbyl group, an oxygen atom, a sulfur atom or an =NR 6 group wherein R 6 represents a hydrogen atom or a substituted or unsubstituted hydrocarbyl group; R 1 , R 2 , R 3 , R 4 and R 5 each represents a substituted or unsubstituted hydrocarbyl group; W represents a --COOM or a hydroxy alkyl group; and M represents a hydrogen atom, an alkali metal atom or an ammonium group; and wherein said ferric salt is ferric chloride, ferric nitrate, ferric sulfate, ferric bromide, ferric phosphate, ferric perchlorate, ammonium ferric sulfate, ferric citrate, ferric oxalate, or ferric acetate.

Claim 3

The method of claim 1 wherein said solution containing an organic carboxylic acid also contains an organic phosphoric acid having the General Formula (IV) r.sub.7 n(ch.sub.2 po.sub.3 m'.sub.2).sub.2 (iv) wherein M' represents a hydrogen atom or a water-solubilizing cation and R 7 represents an alkyl group having 1 to 4 carbon atoms, an aryl group, an aralkyl group, an alicyclic group or a heterocyclic group selected from the group consisting of a pyrrolidylmethyl group, a pyrrolidylbutyl group, a benzothiazoylmethyl group and a tetrahydroquinolylmethyl group; or the General Formula (V) r.sub.8 r.sub.9 c(po.sub.3 m'.sub.2).sub.2 (v) wherein R 8 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aralkyl group, an alicyclic group, a heterocyclic group selected from the group consisting of a pyrrolidylmethyl group, a pyrrolidylbutyl group, a benzothiazoylmethyl group and a tetrahydroquinolylmethyl group or a --PO 3 M' 2 group; R 9 represents a hydrogen atom, a hydroxy group, an alkyl group having 1 to 4 carbon atoms or a --PO 3 M' 2 group, and M' is as above defined.

Claim 4

The method of claim 1, wherein said organic carboxylic acid is acetic acid, propionic acid, butyric acid, isovaleric acid, caproic acid, capric acid, lauric acid, acrylic acid, crotonic acid, propiolic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, cork acid, azelaic acid, sebacic acid, nonanedicarboxylic acid, decanedicarboxylic acid, undecanedicarboxylic acid, maleic acid, fumaric acid, citraconic acid, mesaconic acid, itaconic acid, glycollic acid, lactic acid, β-hydroxypropionic acid, tartronic acid, malic acid, oxalacetic acid, tartaric acid, citric acid, ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, diammonium ethylenediaminetetraacetate, tetra(trimethylammonium) ethylenediaminetetraacetate, tetrapotassium ethylenediaminetetraacetate, tetrasodium ethylenediaminetetraacetate, trisodium ethylenediaminetetraacetate, diethylenetriaminepentaacetic acid, pentasodium diethylenetriaminepentaacetate, ethylenediamine-N-(β-hydroxyethyl)-N,N',N'-triacetic acid, sodium ethylenediamine-N-(β-hydroxyethyl)-N,N',N'-triacetate, triammonium ethylenediamene-N-(β-hydroxyethyl)-N,N',N'-triacetate, propylenediaminetetraacetic acid, sodium propylenediaminetetraacetate, nitrilotriacetic acid, sodium nitrilotriacetate, cyclohexanediaminetetraacetic acid, sodium cyclohexanediaminetetraacetate, iminodiacetic acid, dihydroxyethylglycine, ethyletherdiaminetetraacetic acid, glycoletherdiaminetetraacetic acid, ethylenediaminetetrapropionic acid or phenylenediaminetetraacetic acid.

Claim 5

The method of claim 2, wherein said alkyl group for R 7 and R 9 is an unsubstituted alkyl group or a substituted alkyl group containing as substituents a hydroxy group, an alkoxy group, a halogen atom, a --PO 3 M' 2 group, a --CH 2 PO 3 M' 2 group or a --N(CH 2 PO 3 M' 2 ) 2 group.

Claim 6

The method of claim 2, wherein said organic phosphonic acid is ethylenediamine-N,N,N',N'-tetramethylenephosphonic acid, nitrilo-N,N,N-trimethylenephosphonic acid, 1,2-cyclohexanediamine-N,N,N',N'-tetramethylenephosphonic acid, o-carboxyaniline-N,N-dimethylenephosphonic acid, propylamine-N,N-dimethylenephosphonic acid, 4-(N-pyrrolidino)butylamine-N,N-bis(methylenephosphonic acid), 1,3-diaminopropanol-N,N,N',N'-tetramethylenephosphonic acid, 1,3-propanediamine-N,N,N',N'-tetramethylenephosphonic acid, 1,6-hexanediamine-N,N,N',N'-tetramethylenephosphonic acid, o-acetamidobenzylamine-N,N-dimethylenephosphonic acid, o-toluidine-N,N-dimethylenephosphonic acid, 2-pyridylamine-N,N-dimethylenephosphonic acid, 1-hydroxyethylidene-1, 1-diphosphonic acid, ethylidyne-1,1,1-triphosphonic acid or 1-hydroxy-2-phenylethylidene-1,1-diphosphonic acid.

Claim 7

The method of claim 1, wherein said organic acid is present in an amount of about 1 to 200 g per liter of said solution, and the pH of said solution is 3 or less.

Claim 8

The method of claim 1, wherein said silver halide photographic material comprises a support having thereon at least one silver halide photographic emulsion layer comprising a hydrophilic colloid containing a silver halide and a color coupler dispersed therein.

Claim 9

The method of claim 1, wherein said silver halide photographic material comprises a multi-layer silver halide photographic material comprising a support having thereon at least one blue-sensitive silver halide photographic emulsion layer containing a yellow color coupler, at least one green-sensitive silver halide emulsion layer containing a magenta color coupler, and at least one red-sensitive silver halide emulsion layer containing a cyan color coupler.

Claim 10

The method of claim 1, wherein said bleaching solution has a pH of 3 or lower.

Claim 11

In a method for developing, bleaching and fixing an exposed silver halide photographic material, the improvement which comprises bleaching said photographic material with a bleaching solution containing a ferric salt selected from the group consisting of ferric chloride, ferric nitrate, ferric sulfate, ferric bromide, ferric phosphate, ferric perchlorate, ammonium ferric sulfate, ferric citrate, ferric oxalate and ferric acetate and then processing the photographic material with a solution containing an organic acid selected from the group consisting of dicarboxylic acid, a hydroxycarboxylic acid and a hydroxydicarboxylic acid between the bleaching step and the fixing step.

Claim 12

In a method for developing, bleaching and fixing an exposed silver halide photographic material, the improvement which comprises bleaching said photographic material with a bleaching solution containing a ferric salt selected from the group consisting of ferric chloride, ferric nitrate, ferric sulfate, ferric bromide, ferric phosphate, ferric perchlorate, ammonium ferric sulfate, ferric citrate, ferric oxalate and ferric acetate and then processing the photographic material with a solution containing an organic acid selected from the group consisting of dicarboxylic acid, a hydroxycarboxylic acid and a hydroxydicarboxylic acid between the bleaching step and the fixing step.

Claim 13

The method of claim 1, wherein said bleaching solution further contains an aliphatic carboxylic acid represented by Formula (1).

Claim 14

The method of claim 1, wherein said bleaching solution further contains, as a re-halogenating agent, an alkali metal halide or an ammonium halide.

Claim 15

The method of claim 1, wherein said bleaching solution has a pH of not more than 2.

Claim 16

The method of claim 13, wherein said bleaching solution contains a mineral acid.

Claim 17

The method of claim 13, wherein said bleaching solution contains an organic acid.

Claim 18

The method of claim 1 consisting essentially of the recited steps.

Claim 19

The method of claim 1 including a washing step after said fixing.

Claim 20

The method of claim 1, wherein said solution containing an organic acid is an aqueous solution.

Claim 21

The method of claim 18, wherein said aqueous solution containing an organic acid consists essentially of said organic acid and water.

Claim 22

The method of claim 1, wherein the pH of said fixing solution is not less than 3.