Method for color image formation comprising a rapid desilvering process

Claim 3

A method for color image formation as in claim 1, wherein said mono-dispersed silver halide grains have a coefficient of grain size variation of not more than 0.25.

Claim 4

A method for color image formation as in claim 1, wherein said mono-dispersed silver halide grains have a layered structure composed of substantially two distinct stratiform structures, one of which is a core having a high iodide content and the another being a shell having a low iodide content.

Claim 5

A method for color image formation as in claim 3, wherein said core comprises silver halide grain having an iodide content of from 10 to 45 mol%, and said shell comprises silver halide grain having an iodide content of not more than 5 mol%.

Claim 6

A method for color image formation as in claim 3, wherein the iodide distribution among said grains has a relative standard deviation of not more than 50%.

Claim 7

A method for color image formation as in claim 3, wherein a silver content ratio of the core to the shell ranges from 1/5 to 5/1.

Claim 8

A method of color image formation as in claim 6, wherein said bath primarily having bleaching capacity contains from 0.1 to 1 mol of a bleaching agent per liter of a bleaching solution and said bath having bleach fixing capacity contains from 0.05 to 0.5 mol of a bleaching agent per liter of a bleaching solution.

Claim 9

A method for color image formation as in claim 7, wherein said bleaching agent is an aminopolycarboxylic acid ferric complex salt.

Claim 10

A method for color image formation as in claim 6, wherein said bath primarily having bleaching capacity and/or said bath having bleach-fixing capacity contains a water-soluble bromide.

Claim 11

A method for color image formation as in claim 9, wherein said water-soluble bromide is ammonium bromide.

Claim 12

A method for color image formation as in claim 9, wherein said bath primarily having bleaching capacity contains from 0.5 to 1.3 mol of said water-soluble bromide per liter.

Claim 13

A method for color image formation as in claim 9, wherein said bath having bleach-fixing capacity contains from 0.1 to 0.5 mol of said water-soluble bromide per liter.

Claim 14

A method for color image formation as in claim 1, wherein said bath primarily having bleaching capacity contains at least one of compounds represented by the formulae (I) to (IX) as a bleach accelerator: ##STR13## wherein R 1 and R 2 , which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted lower alkyl group or an acyl group, or R 1 and R 2 may be taken together to form a ring; and n represents an integer of from 1 to 3, ##STR14## wherein R 3 and R 4 , which may be the same or different, each has the same meaning as for R 1 and R 2 ; and n is as defined above, ##STR15## wherein R 5 represents a hydrogen atom, a halogen atom, an amino group, a substituted or unsubstituted lower alkyl group or an alkylamino group, ##STR16## wherein R 6 and R 7 , which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group or a substituted or unsubstituted heterocyclic group; R 8 represents a hydrogen atom or a substituted or unsubstituted lower alkyl group; and R 9 represents a hydrogen atom or a carboxyl group, ##STR17## wherein R 10 , R 11 and R 12 , which may be the same or different, each represents a hydrogen atom or a lower alkyl group; R 10 and either of R 11 and R 12 may be taken together to form a ring; X represents a substituted or unsubstituted amino group, a sulfonic acid group or a carboxyl group; and n is as defined above, ##STR18## wherein R 13 and R 14 each represents a hydrogen atom, a hydroxyl group, a substituted or unsubstituted amino group, a carboxyl group, a sulfo group or a substituted or unsubstituted alkyl group; R 15 and R 16 each represents a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted acyl group; or R 15 and R 16 may be taken together to form a ring; M represents a hydrogen atom, an alkali metal atom or an ammonium group; and m represents an integer of from 2 to 5, ##STR19## wherein Y represents N or C-R; R, R 17 , R 18 and R 19 each represents a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a carboxyl group, a sulfo group or a substituted or unsubstituted amino group; R 20 and R 21 each represents a hydrogen atom, a substituted or unsubstituted alkyl group or an acyl group, or R 20 and R 21 may be taken together to form a ring, with the proviso that R 20 and R 21 do not simultaneously represent hydrogen atoms; and l represents 0 or an integer of from 1 to 5.

Claim 15

A method of color image formation as in claim 13, wherein said bleach accelerator is present in an amount of from 1×10 -5 to 1×10 -1 mol per liter of a processing solution.

Claim 16

A method for color image formation as in claim 2, wherein said mono-dispersed silver halide grains have a coefficient of grain size variation of not more than 0.15.

Claim 17

A method for color image formation as in claim 4, wherein said core comprises silver halide grains having an iodide content of from 15 to 40 mol % and said shell comprises silver halide grains having an iodide content of not more than 2 mol%.

Claim 18

A method for color image formation as in claim 5, wherein the iodide distribution among said grains has a relative standard deviation of not more than 20%.

Claim 19

A method for color image formation as in claim 6, wherein the silver content ratio of the core to the shell ranges from 1/5 to 2/1.