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Method for processing silver halide color photographic materials    

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United States Patent4797351   
Link to this pagehttp://www.wikipatents.com/4797351.html
Inventor(s)Ishikawa; Masao (Hino, JP); Koboshi; Shigeharu (Hino, JP); Miyaoka; Kazuyoshi (Hino, JP); Kuse; Satoru (Hino, JP)
AbstractA replenishing process for use in the development of an image-wise exposed silver halide color photographic light-sensitive material in which a color developer replenisher containing 0-3.0.times.10.sup.-3 mole of bromide is added to a color developer in a volume of between 0.5 and 9 ml per 100 cm.sup.2 of silver halide color photographic light-sensitive material.
   














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Drawing from US Patent 4797351
Method for processing silver halide color photographic materials - US Patent 4797351 Drawing
Method for processing silver halide color photographic materials
Inventor     Ishikawa; Masao (Hino, JP); Koboshi; Shigeharu (Hino, JP); Miyaoka; Kazuyoshi (Hino, JP); Kuse; Satoru (Hino, JP)
Owner/Assignee     Konishiroku Photo Industry Co., Ltd. (Tokyo, JP)
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Publication Date     January 10, 1989
Application Number     06/856,779
PAIR File History     Application Data   Transaction History
Image File Wrapper   Patent Term   Fees
Litigation
Filing Date     April 25, 1986
US Classification     430/387 430/386 430/399 430/491 430/558
Int'l Classification     G03C 007/30 G03C 007/38
Examiner     Schilling; Richard L.
Assistant Examiner    
Attorney/Law Firm     Bierman; Jordan B.
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Priority Data     Apr 30, 1985[JP]60-94760
USPTO Field of Search     430/399 430/386 430/387 430/558 R
Patent Tags     processing silver halide color photographic materials
   
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ReferenceRelevancyCommentsReferenceRelevancyComments
4639415
Kaneko
430/558
Jan,1987

[0 after 0 votes]
4613562
Kuse
430/450
Sep,1986

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4348475
Wernicke
430/399
Sep,1982

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4297437
Kaneko
430/376
Oct,1981

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What is claimed is:

1. A processing method of an image-wise exposed silver halide color photographic light-sensitive material comprising a replenishing process to replenish a color developer-replenisher to a color developer being used for said processing, wherein said silver halide color photographic material comprises at least one emulsion layer comprising a core-shell structural silver halide grain containing not less than 3 mol% of silver iodide and a magenta coupler represented by the following general formula [I], and said color developer replenisher contains 0 to 3.0.times.10.sup.-3 mol of bromide per liter and a replenishing volume of said color developer-replenisher to be replenished to said color developer is 0.5 to 9 ml per 100 cm.sup.2 of said silver halide color photographic light-sensitive material: ##STR69## wherein, Z represents a group of non-metallic atoms necessary to form a nitrogen-containing heterocyclic ring;

X represents a hydrogen atom or a substituent which is, upon a reaction with an oxidation product of a color developing agent, capable of being released from the coupler residue;

and R represents a hydrogen atom, substituent.

2. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XII], [XIII] or [XIV]:

[XII] A--COOM

[XIII] B--PO.sub.3 M.sub.2 ##STR70## wherein, A and B represent a monovalent atom, or a monovalent inorganic or organic group;

D represents a group of non-metallic atoms necessary to complete an aromatic ring or a heterocyclic ring;

and M represents a hydrogen atom or an alkali metal atom.

3. The processing method of claim 2, wherein said color developer replenisher contains 0 to 2.0.times.10.sup.-3 mol of a bromide.

4. The processing method of claim 1, wherein said magenta coupler is represented by the general formula [VIII]: ##STR71## wherein, Z.sub.1, X, R, represent the same atoms or groups represented by Z, X, R of the formula [I], respectively.

5. The processing method of claim 4, wherein said magenta coupler is represented by the general formula [II]: ##STR72## wherein, R represents the same atoms or groups represented by R of the formula [I];

X is the same as X of the formula [I];

and R.sub.2 represents a substituent.

6. The silver halide photographic material of claim 1, wherein said R represents a hydrogen atom, a halogen atom or a monovalent group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a residue of spiro compounds, a residue of bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a siloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group.

7. The processing method of claim 6, wherein said R is represented by the general formula [IX]: ##STR73## wherein, said R.sub.9, R.sub.10 and R.sub.11 represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a residue of spiro compounds, a residue of bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a cyloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group, respectively, provided that at least two of R.sub.9, R.sub.10 and R.sub.11 shall not be hydrogen atoms.

8. The processing method of claim 7, wherein two of said R.sub.9, R.sub.10 and R.sub.11 are alkyl groups, respectively.

9. The processing method of claim 7, wherein two of said R.sub.9, R.sub.10 and R.sub.11 form a saturated or unsaturated ring.

10. The processing method of claim 9, wherein one of said R.sub.9, R.sub.10 and R.sub.11 is a hydrogen atom and group represented remaining two of them form a cycloalkyl ring with the carbon atoms combined with said two groups.

11. The processing method of claim 5, wherein R.sub.2 is represented by the general formula [X]:

[X] --R.sup.1 --SO.sub.2 --R.sup.2

wherein,

R.sup.1 represents an alkylene group,

and R.sup.2 represents an alkyl group, a cycloalkyl group or an aryl group.

12. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XV]:

[XV] M.sub.m P.sub.m O.sub.3m

wherein,

M represents a hydrogen atom or an alkali metal atom,

and m represents an integer of 3 to 6.

13. The processing method of claim 2, wherein said chelating agent represented by the general formula [XII] is represented by the general formula [XVII]:

[XVII] A.sub.1 --R.sub.21 --Z--R.sub.22 --COOH

wherein,

Z represents .dbd.N--R.sub.27 --A.sub.6 or .dbd.N--A.sub.6,

A.sub.2 and A.sub.6 independently represents a hydrogen atom, --OH, --COOM, or --PO.sub.3 M.sub.2,

R.sub.21, R.sub.22 and R.sub.27 independently represents a substituted or unsubstituted alkylene group;

and M is the same as M of the general formula [XII].

14. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XXII]: ##STR74## wherein, R.sub.34 represents a group selected from the group consisting of an alkyl group containing 1 to 12 carbon atoms, an alkoxy group containing 1 to 12 carbon atoms, a monoalkylamino group containing 1 to 12 carbon atoms, a dialkylamino group containing 2 to 12 carbon atoms, an amino group, an allyloxy group containing 1 to 24 carbon atoms, an arylamino group containing 6 to 24 carbon atoms, and an amyloxy group;

Q.sub.1, Q.sub.2 and Q.sub.3 independently represent a group selected from the group consisting of --OH, an alkoxy group containing 1 to 24 carbon atoms, an aralkyloxy group containing 1 to 24 carbon atoms, an alkoxy group containing 1 to 24 carbon atoms, --OM' (M' is a cation), an amino group, a morpholino group, a cyclic amino group, an alkylamino group, a dialkylamino group, an arylamino group and an alkyloxy group.

15. The processing method of claim 2, wherein said chelating agent represented by the general formula [XIV] is represented by the general formula [XXIII]: ##STR75## wherein, R.sub.35 and R.sub.36 independently represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a sulfonic acid group, an alkyl group containing 1 to 7 carbon atoms, --OR.sub.39, --COOR.sub.40, ##STR76## and a phenyl group in which R.sub.39, R.sub.40, R.sub.41, and R.sub.42 independently represent a hydrogen atom or an alkyl group containing 1 to 18 carbon atoms.

16. The processing method of claim 2, wherein said chelating agent represented by the general formula [XIV] is represented by the general formula [XXV]: ##STR77## wherein, R.sub.43 and R.sub.44 independently represent a hydrogen atom, a halogen atom or a sulfonic acid group.

17. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XXVI]: ##STR78## wherein, R.sub.49 and R.sub.50 independently represent a hydrogen atom or a group selected from the group consisting of a phosphoric acid group, a carbonic acid group --CH.sub.2 COOH, --CH.sub.2 PO.sub.3 H.sub.2, and their salts,

X.sub.10 represents a hydroxy group or its salts;

W.sub.10, Z.sub.10 and Y.sub.10 independently represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a hydroxy group, a cyano group, a carbonic acid group, a phosphoric acid group, a sulfonic acid group, and their salts, an alkoxy group, and an alkyl group;

m.sub.1 represents an integer of 0 or 1;

n.sub.1 represents an integer of 1 to 4;

I.sub.1 represents an integer of 1 or 2;

p.sub.1 represents an integer of 0 to 3;

and q.sub.1 represents an integer of 0 to 2.

18. The processing method of claim 2, wherein a content of said chelating agent in said color developer is within the range of 1.times.10.sup.-4 to 1 mol/l.

19. The processing method of claim 1, wherein a content of silver iodide in a core of said core-shell structural silver halide grain is within the range of 0.5 to 10 mol%.

20. The processing method of claim 1, wherein a shell of said core-shell structural silver halide grain consists of silver bromide or silver bromoiodide.

21. The processing method of claim 4, wherein said R represents a hydrogen atom, a halogen atom or a monovalent group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group a cyano group, a residue of spiro compounds, a residue of bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a siloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group.

22. The silver halide photographic material of claim 5, wherein said R represents a hydrogen atom, a halogen atom or a monovalent group selected from the group consisting of an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group a cyano group a residue of spiro compounds, a residue of bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a siloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group.

23. The process method of claim 4, wherin said R is represented by the general formula [IX]: ##STR79## wherein, said R.sub.9, R.sub.10 and R.sub.11 represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a residue of spiro compounds, a residue fo bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a cyloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group, respectively, provided that at least two of R.sub.9, R.sub.10 and R.sub.11 shall not be hydrogen atoms.

24. The process method of claim 5, wherein said R is represented by the general formula [IX]: ##STR80## wherein, said R.sub.9, R.sub.10 and R.sub.11 represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a residue of spiro compounds, a residue of bridged hydrocarbons, an alkoxy group, an aryloxy group, a heterocycloxy group, a cyloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamido group, an imido group, a ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylthio group, an arylthio group, and a heterocyclic group, respectively, provided that at least two of R.sub.9, R.sub.10 and R.sub.11 shall not be hydrogen atoms.

25. The processing method of claim 2, wherein said chelating agent represented by the general formula [XXIV]: ##STR81## wherein, R.sub.37 and R.sub.38 independently represent a hydrogen atom, a halogen atom or a group selected from the group consisting of a sulfonic acid group, an alkyl group containing 1 to 7 carbon atoms, --OR.sub.39, --COOR.sub.40, ##STR82## and a phenyl group in which R.sub.39, R.sub.40, R.sub.41, and R.sub.42 independently represent a hydrogen atom or an alkyl group containing 1 to 18 carbon atoms.

26. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XVI]:

[XVI] M.sub.n+2 P.sub.n O.sub.3n+1

wherein, M represents a hydrogen atom or an alkali metal atom and n represents an integer of 2 to 20.

27. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XIX]:

[XIX] R.sub.28 --N (CH.sub.2 PO.sub.3 M.sub.2).sub.2

wherein,

R.sub.28 represents a group selected from the group consisting of a lower class alkyl group, an aryl group, an alalkyl group, or a nitrogen-containing six membered heterocyclic group, --OH, --OR and --COOM;

and M represents a hydrogen atom or an alkali metal atom.

28. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XX]: ##STR83## wherein, R.sub.29, R.sub.30 and R.sub.31 represent a hydrogen atom or a lower class alkyl group, which may have --OH, --COOM, or --PO.sub.3 M.sub.2 as a substituent;

B.sub.1, B.sub.2 and B.sub.3 independently represent a hydrogen atom or a group selected from the group consisting of --OH, --COOM, --PO.sub.3 M.sub.2 and --NJ.sub.2 in which J represents a hydrogen atom, a lower class alkyl group, --C.sub.2 H.sub.4 OH or PO.sub.3 M.sub.2 and M represents a hydrogen or an alkali metal atom

and m' and n' represents an integer of 0 or 1, respectively.

29. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XXI]: ##STR84## wherein, R.sub.32 and R.sub.33 represent a hydrogen atom, an alkali metal atom or a group selected from the group consisting of an alkyl group, an alkenyl group, and a cycloalkyl group, each containing 1 to 12 carbon atoms,

and M represents a hydrogen atom or an alkali metal atom.

30. The processing method of claim 1, wherein said color developer contains a chelating agent represented by the general formula [XVIII]: ##STR85## wherein, E represents a group selected from the group consisting of an alkylene group, a cycloalkylene group, a phenylene group, --R.sub.27 --OR.sub.27 --, --R.sub.27 --OR.sub.27 OR.sub.27 --, and R.sub.27 Z.sub.2 R.sub.27 --, in which Z.sub.2 represents >N--R.sub.27 --A.sub.6 or >N--A.sub.6 ;

A.sub.2, A.sub.3, A.sub.4, A.sub.5 and A.sub.6 independently represent a hydrogen atom, --OH, --COOM, or --PO.sub.3 M.sub.2,

R.sub.24, R.sub.25, R.sub.26 and R.sub.27, independently represent a substituted or unsubstituted alkylene group,

and M represents a hydrogen atom or an alkali metal atom.
 Description Submit all comments and votes
 


BACKGROUND OF THE INVENTION

The present invention relates to the method for processing silver halide color photographic materials and particularly to the method for processing silver halide color photographic materials capable of improving remarkably the processing variation in the color development and of realizing the low environmental pollution.

Generally, color photographic materials produce thereon photographic images after they pass through the processing steps including a color developing step wherein color photographic materials, after they are exposed to light, are processed in the developer containing paraphenylene type color developing agent, a bleaching step and a fixing step or a bleach-fix step in place of previous two steps and a washing step.

In aforesaid color developing step, color images are formed by the coupling reaction between an oxidation product of color developing agent and a color coupler and metallic silver are concurrently produced in the photographic step. The metallic silver are oxidized by bleaching agents in the succeeding desilverizing step and then form, through the aid of fixing agents, the soluble silver complexes which are dissolved away.

Researches for low environmental pollution have been made recently from the viewpoints of an environmental protection and a cost and have been put to practical use in a partial processing steps. Especially in the color developing step, various technologies for low environmental pollution have been proposed in the past due to the level of an influence of the color developing step upon environmental pollution. For example, regenerating methods through an electrolysis described in Japanese Patent Publication Open to Public Inspection Nos. 37731/1979, 1048/1981, 1049/1981, 27142/1981, 33644/1981 and 149036/1981 (hereinafter referred to as Japanese Patent O.P.I. Publication), generating methods by means of activated carbon described in Japanese Patent Examined Publication No. 1571/1980 and Japanese Patent O.P.I. Publication No. 14831/1983, an ion exchange membrane method described in Japanese Patent O.P.I. Publication No. 105820/1977 and methods by means of an ion exchange resin described in Japanese Patent O.P.I Publication Nos. 132343/1978, 144240/1980, 146249/1982 and U.S. Pat. No. 4,348,475 and disclosed. However, aforesaid methods require a large and expensive regenerating apparatus and a skilled person who can analyze regenerating liquid for keeping the development level constant and therefore the methods are not utilized except an occasion where the methods are used by only a few photofinishing laboratories. Recently, on the other hand, a method for reducing waste liquid not by using a regenerating method but by reducing replenisher for the color developer has become popular. This method does not require a large and expensive apparatus and a skilled analyzer and therefore it is a desirable method for achieving low environmental pollution, which is different from aforesaid methods. Through this method, it is possible to attain a low replenishment to a certain extent but this method has serious disadvantages such as the condensation of color developer caused by evaporation, mixing of iron salt and thiosulfate caused by the belt contamination and back contamination and a large process variation and a large process stain both caused by the substances eluted from the emulsion such as, for example, an outflow of activator and inhibitor. This tendency is remarkable especially when the low replenishment is accelerated under the conditions of high temperature processing and low volume processing. As a technology for preventing the process variation caused by iron salt and thiosulfate both mixed into color developer during the low replenishment, various types of chelating agents are disclosed and further polyvinyl pirrolidone type compounds and polyethylene glycol type compounds are disclosed in Japanese Patent O.P.I. Publication Nos. 150847/1982, 120250/1983 and 121036/1983, but all of them only prevent iron salt and thiosulfate both in a small amount to be mixed and they are not so effective when the low replenishment is accelerated and the amount level of iron salt and thiosulfate mixed into color developer is high. Further, when aforesaid chelating agents and polyvinyl pirrolidone type and polyethylene glycol type high molecular compounds are added in abundance, the photographic characteristics of photosensitive materials are adversely affected, which is not desirable.

SUMMARY OF THE INVENTION

An object of the invention is to improve greatly the process variation for silver halide photographic materials caused by the low replenishment and another object is to attain a remarkable low environmental pollution through a simple and inexpensive method. Further object of the invention is to provide a processing method capable of forming a color photographic image that is high sensitive and is excellent in its image quality.

After an enthusiastic study, the inventors of the present invention found that the processing of silver halide color photographic material having at least one layer of core/shell emulsion containing 3 mol% or more of silver iodide and containing magenta coupler represented by following general formula [I] is attained by replenishing 9 ml and less of the replenisher for color development containing 3.0.times.10.sup.-3 mol and less of bromides per 100 cm.sup.2 of silver halide color photographic material. ##STR1##

In the formula, Z represents a nonmetallic atom group necessary for forming a nitrogen-containing heterocyclic ring and a ring formed by said Z may have a substituent. X represents a hydrogen atom or a substituent capable of splitting off through the reaction with an oxidized substance of color developing agent.

R, on the other hand, represents a hydrogen atom or a substituent.

Further, the embodiments of the invention wherein chelating agents represented by following general formulas [XI]-[XIII] are contained and further 2.0.times.10.sup.-3 mol and less of bromides are contained in the replenisher for color development and aforesaid replenisher for color development in the amount of 7.5 ml and less is replenished per 100 cm.sup.2 of silver halide color photographic material, show remarkable effects of the invention.

General formula [XI] A-COOM

General formula [XII] B-PO.sub.3 M.sub.2 ##STR2##

In the formulas, A and B represent respectively a monovalent group or an atom and they may be either an inorganic substance or an organic one. D represents a group of non-metal atoms necessary for forming an aromatic cyclic ring or a heterocyclic ring which may have a substituent and M represents a hydrogen atom or an alkali metal atom.

DETAILED DESCRIPTION OF THE INVENTION

Following is a detailed description of the invention. The inventors of the invention found that the process variation and process stain for color photographic materials grow large when the low replenishment is made for realizing a low environmental pollution and a low cost and especially when 9 ml and less of the replenisher for color development is replenished for processng per 100 cm.sup.2 of silver halide color photographic material, the process variation grows large remarkably. Generally, color photographic materials containing silver iodide such as, for example, color negative films like color photographic materials for use in photographing require the replenishment of about 15 ml of the replenisher for color development per 100 cm.sup.2 of the color photographic material. In this case, there is no big problem except mixing of ingredients from a previous bath such as iron salt and thiosulfate because the amount of replenishment is large. However, when the amount of replenishment is lowered down to 9 ml and below, the problems including the condensation of color developer caused by the evaporation and the accumulation of the substances eluted from the emulsion take place and especially, the density variation of a green-sensitive layer and stain tend to be caused, which was found by the inventors of the invention. Therefore, it is necessary to prevent the condensation of color developer caused by evaporation or to prevent the influence on color photographic material to some extent despite the condensation and further it is necessary to prevent or to control constant the accumulation of the substances eluted from emulsion, especially of alkali salt halide.

A lower replenishment has hitherto been impossible because no solutions for the aforesaid problems have been found out. However, with silver halide color photographic material having at least one emulsion layer containing core/shell type silver halide grains holding 3 mol% or more of silver iodide and containing magenta coupler represented by general formula [I], the low replenishment of 9 ml/100 cm.sup.2 and less has been realized by keeping bromides in the replenisher for color development at 3.0.times.10.sup.-3 mol per liter and less and by maintaining at bromide concentration which causes no problem in the color development.

Further detailed description of the invention will be made as follows. The replenishing amount of replenisher for color development of the invention is 9 ml and less but when the evaporating amount is taken into consideration, the range from 1 ml to 9 ml in replenishment is preferable and the range from 3 ml to 8 ml is especially preferable.

With regard to the replenishing method, the replenisher for color development is replenished through a known method but it is recommendable to use a metering pump such as a bellows pump. The replenisher for color development of the invention contains 3.0.times.10.sup.-3 mol per liter and less of bromides and it is necessary to adjust the concentration of bromide depending on the level of low replenishment. In general, it is necessary to reduce the concentration of bromide contained in the replenisher for color development as a replenishing amount is reduced.

The concentration of bromide in the replenisher for color development is adjusted so that the concentration of bromide (mainly determined by elution from emulsion and evaporation) is kept constant, and when the concentration of bromide is 3.0.times.10.sup.-3 mol per liter and less and the amount of the replenisher for color development is within the range of from 0.5 to 9 ml/100 cm.sup.2 a stable processing can be achieved without so affecting any photographic characteristics.

As an actual compound of bromide, there may be given an alkali metal salt such as sodium bromide, potassium bromide and ammonium bromide as well as hydrobromic acid.

A concrete description of the invention will be made as follows.

In magenta coupler of the invention represented by aforesaid general formula [I], ##STR3##

Z represents a nonmetallic atom group necessary for forming a nitrogen-containing heterocyclic ring and a ring formed by aforesaid Z may have a substituent.

X represents a hydrogen atom or a substituent capable of splitting off through the reaction with an oxidation product of color developing agent.

R, on the other hand, represents a hydrogen atom or a substituent.

As a substituent represented by aforesaid R, there may be given, for example, a halogen atom, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkinyl group, an aryl group, a heterocyclic group, an acyl group, a sulfonyl group, a sulfinyl group, a phosphonyl group, a carbamoyl group, a sulfamoyl group, a cyano group, a spiro-compound residue, a bridge-type hydrocarbon compound residue, an alkoxy group, an aryloxy group, a heterocyclicoxy group, a cyloxy group, an acyloxy group, a carbamoyloxy group, an amino group, an acylamino group, a sulfonamide group, an imido group, an ureido group, a sulfamoylamino group, an alkoxycarbonylamino group, an aryloxycarbonyl group, an alkylthio group, an arylthio group and a heterocyclicthio group.

As a halogen atom, a chlorine atom and a bromine atom, for example, are given and a chlorine atom is particularly preferable.

As an alkyl group represented by R, the alkyl group having the number of carbons of 1-32 and an alkenyl group, the one having the number of carbons of 2-32 and a cycloalkyl group and the one having the number of carbons of 3-12, especially of 5-7 as a cycloalkenyl group are preferable and an alkyl group, an alkenyl group and an alkinyl group may be of the type of either straight chain or branching.

Further, these alkyl group, alkenyl group, alkinyl group, cycloalkyl group and cycloalkenyl group may have a substituent [for example, in addition to an aryl group, a cyano group, a halogen atom, a heterocyclic group, a cycloalkyl group, a cycloalkenyl group, a spiro-compound residue and a bridge-type hydrocarbon compound residue, the substituent that substitutes through a carbonyl group such as an acyl group, a carboxy group, a carbamoyl group, an alkoxycarbonyl group and an aryloxycarbonyl group, the substituent that substitutes through a hetero-atom {concretely, the substituent that substitutes through an oxygen atom such as a hydroxy group, an alkoxy group, an aryloxy group, a heterocyclicoxy group, a cyloxy group, an acyloxy group and a carbamoyloxy group, the substituent that substitutes through a nitrogen atom such as a nitro group, an amino (including dialkylamino and others) group, a sulfamoylamino group, an alkoxycarbonylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group, an acylamino group, a sulfonamide group, an imido group and a ureido group, the substituent that substitutes through a sulfur atom such as an alkylthio group, an arylthio group, a heterocyclicthio group, a sulfonyl group, a sulfinyl group and a sulfamoyl group and the substituent that substitutes through a phosphorus atom such as a phosphonyl group}].

Concretely, there are given a methyl group, an ethyl group, an isopropyl group, a t-butyl group, a pentadecyl group, a heptadecyl group, a 1-hexylnonyl group, a 1,1'-dipentylnonyl group, a 2-chloro-t-butyl group, a trifluoromethyl group, a 1-ethoxytridecyl group, a 1-methoxyisopropyl group, a methanesulfonylethyl group, a 2,4-di-t-amylphenoxymethyl group, an anilino group, a 1-phenylisopropyl group, a 3-m-butanesulfonaminophenoxypropyl group, a 3-4'-{.alpha.-[4"(p-hydroxybenzenesulfonyl)phenoxy]dodecanoylamino}phenylp ropyl group, 3-{4'-[.alpha.-(2",4"-di-t-amylphenoxy)butaneamide]phenyl}-propyl group, 4-[.alpha.-(o-chlorophenoxy)tetradecaneamidephenoxy]propyl group, an aryl group, a cyclopentyl group and a cyclohexyl group.

As an aryl group represented by R, a phenyl group is preferable and it may have a substituent (for example, an alkyl group, an alkoxy group or an acylamino group).

Concretely, there are given phenyl group, a 4-t-butylphenyl group, a 2,4-di-t-amylphenyl group, a 4-tetradecaneamidephenyl group, a hexadecyloxyphenyl group and a 4'-[.alpha.-(4"-t-butylphenoxy)tetradecaneamide]phenyl group.

As a heterocyclic group represented by R, the heterocyclic group having 5-7 members is preferable and it can either be substituted or condensed. Concrete examples are a 2-furyl group, a 2-thienyl group, a 2-pyrimidinyl group, a benzothiazolyl group and others.

As an acyl group represented by R, an alkylcarbonyl group such as, for example, an acetyl group, an phenylacetyl group, a dodecanoyl group and an .alpha.-2,4-di-t-amylphenoxybutanoyl group and an arylcarbonyl group such as a benzoyl group, a 3-pentadecyloxybenzoyl group and a p-chlorobenzoyl group are given.

As a sulfonyl group represented by R, an alkylsulfonyl group such as a methylsulfonyl group and a dodecylsulfonyl group as well as an arylsulfonyl group such as a benzenesulfonyl group and a p-toluenesulfonyl group are given.

As a sulfinyl group represented by R, an alkylsulfinyl group such as an ethylsulfinyl group, an octylsulfinyl group and a 3-phenoxybutylsulfinyl group as well as an arylsulfinyl group such as a phenylsulfinyl group and a m-pentadecylphenylsulfinyl group are cited.

As a phosphonyl group represented by R, there may be cited an alkylphosphonyl group such as a butyloctylphosphonyl group, an alkoxyphosphonyl group such as an octyloxyphosphonyl group, an aryloxyphosphonyl group such as phenoxyphosphonyl group and an arylphosphonyl group such as a phenylphosphonyl group.

A carbamoyl group represented by R may be substituted with an alkyl group or with an aryl group (preferably, phenyl group) and there may be cited, for example, an N-methylcarbamoyl group, an N,N-dibutylcarbamoyl group, an N-(2-pentadecyloctylethyl)carbamoyl group, an N-ethyl-N-dodecylcarbamoyl group and an N-{3-(2,4-di-t-amylphenoxy)propyl}carbamoyl group.

A sulfamoyl group represented by R may be substituted with an alkyl group or with an aryl group (preferably, a phenyl group) and there may be cited as an example, an N-propylsulfamoyl group, an N,N-diethylsulfamoyl group, an N-(2-pentadecyloxyethyl)sulfamoyl group, an N-ethyl-N-dodecylsulfamoyl group and an N-phenylsulfamoyl group.

As a spiro-compound residue represented by R, spiro[3.3]heptane-1-yl may be cited as an example.

As a bridge-type carbonized compound residue represented by R, bicyclo[2.2.1]heptane-1-yl, tricyclo[3.3.1.1.sup.3,7 ]decane-1-yl and 7,7-dimethyl-bicyclo[2.2.1]heptane-1-yl are cited as an example.

An alkoxy group represented by R may further be substituted with a substituent cited for aforesaid alkyl group and a methoxy group, a propoxy group, a 2-ethoxyethoxy group, a pentadecyloxy group, a 2-dodecyloxynitoxy group and a phenethyloxyethoxy group are cited as an example.

As an aryloxy group represented by R, a phenyloxy group is preferable and an aryl nucleus may further be substituted with a substituent or an atom cited for aforesaid aryl group and a phenoxy group, a p-t-butylphenoxy group and an m-pentadecylphenoxy group may be cited as an example.

As a heterocyclicoxy group represented by R, a group having a heterocyclic ring of 5-7 members is preferable and the heterocyclic ring may further have a substituent and a 3,4,5,6-tetrahydropyranyl-2-oxy group and a 1-phenyltetrazole-5-oxy group are given as an example.

A cyloxy group represented by R may further be substituted with an alkyl group and others and a trimethylcyloxy group, a triethylcyloxy group and a dimethylbutylcyloxy group are given as an example.

As an acyloxy group represented by R, an alkylcarbonyloxy group and an arylcarbonyloxy group are cited as an example and they may further have a substituent and concrete examples thereof include an acetyloxy group, an .alpha.-chloroacetyloxy group and a benzoyloxy group.

A carbamoyloxy group represented by R may be substituted with an alkyl group or with an aryl group and an N-ethylcarbamoyloxy group, an N,N-diethylcarbamoyloxy group and an N-phenylcarbamoyloxy group may be cited as an example.

An amino group represented by R may be substituted with an alkyl group or with an aryl group (preferably, a phenyl group) and examples thereof are an ethylamino group, an anilino group, an m-chloroanilino group, a 3-pentadecyloxycarbonylanilino group and a 2-chloro-5-hexadecaneamidoanilino group.

As an acylamino group represented by R, an alkylcarbonylamino group, an arylcarbonylamino group (preferably, a phenylcarbonylamino group) and others are given and they may further have a substituent and there are concretely cited an acetamido group, an .alpha.-ethylpropaneamido group, an N-phenylacetamido group, a dodecaneamido group, a 2,4-di-t-amylphenoxyacetamido group, .alpha.-3-t-butyl 4-hydroxyphenoxybutaneamido group and others.

As a sulfonamide group represented by R, an alkylsulfonylamino group, an arylsulfonylamino group and others are given and they may further have a substituent. A methylsulfonylamino group, a pentadecylsulfonylamino group, a benzenesulfonamido group, a p-toluenesulfonamido group, a 2-methoxy-5-t-amylbenzenesulfonamido group and others are concretely cited.

An imido group represented by R may be either of an open-chain type or of a cyclic type and it may have a substituent. A succinic acid amide group and a 3-heptadecyl succinic acid amide group, a phthalimido group, a glutarimide group and others are given as an example.

An ureido group represented by R may be substituted with an alkyl group or with an aryl group (preferably, a phenyl group) and an N-ethylureido group, an N-methyl-N-decylureido group, an N-phenylureido group, an N-p-tolylureido group and others are given as an example.

A sulfamoylamino group represented by R may be substituted with an alkyl group or with an aryl group (preferably, a phenyl group) and an N,N-dibutylsulfamoylamino group, an N-methylsulfamoylamino group, an N-phenylsulfamoylamino group and others are given as an example.

An alkoxycarbonylamino group represented by R may further have a substituent and a methoxycarbonylamino group, a methoxyethoxycarbonylamino group, an octadecyloxycarbonylamino group and others are given as an example.

An aryloxycarbonylamino group represented by R may have a substituent and a phenoxycarbonylamino group and a 4-methylphenoxycarbonylamino group are given as an example.

An alkoxycarbonyl group represented by R may further have a substituent and a methoxycarbonyl group, a butyloxycarbonyl group, a dodecyloxycarbonyl group, an octadecyloxycarbonyl group, an ethoxymethoxycarbonyloxy group, a benzyloxycarbonyl group and others are given as an example.

An aryloxycarbonyl group represented by R may further have a substituent and a phenoxycarbonyl group, a p-chlorophenoxycarbonyl group, an m-pentadecyloxyphenoxycarbonyl group and others are given as an example.

An alkylthio group represented by R may further have a substituent and an ethylthio group, a dodecylthio group, an octadecylthio group, a phenetilthio group and a 3-phenoxypropylthio group are given as an example.

As an arylthio group represented by R, a phenylthio group is preferable and it may further have a substituent and a phenylthio group, a p-methoxyphenylthio group, a 2-t-octylphenylthio group, a 3-octadecylphenylthio group, a 2-carboxyphenylthio group, a p-acetaminophenylthio group and others are given as an example.

As a heterocyclicthio group represented by R, a heterocyclicthio group with 5-7 members is preferable and it may further have a condensed ring and even a substituent. For example, a 2-pyridylthio group, a 2-benzthiazolylthio group and a 2,4-diphenoxy-1,3,5-triazole-6-thio group are given.

As a substituent represented by X capable of splitting off through the reaction with an oxidation product of color developing agent, the groups substituted through carbon atoms, oxygen atoms, sulfur atoms or nitrogen atoms are given as an example in addition to the group substituted through halogen atoms (chlorine atom, bromine atom, fluorine atom or the like).

As a group substituted through carbon atoms, a group represented by the following general formula, a hydroxymethyl group and a triphenylmethyl group are given in addition to carboxyl group. ##STR4## (R.sub.1 ' is synonymous with aforesaid R, Z' is synonymous with aforesaid Z and R.sub.2 ' and R.sub.3 ' represent a hydrogen atom, an aryl group, an alkyl group or a heterocyclic group.)

As a group substituted through oxygen atoms, an alkoxy group, an aryloxy group, a heterocyclicoxy group, an acyloxy group, a sulfonyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an alkyloxyalyloxy group and an alkoxyoxalyloxy group are given as an example.

Aforesaid alkoxy group may further have a substituent and an ethoxy group, a 2-phenoxyethoxy group, a 2-cyanoethoxy group, a phenethyloxy group, a p-chlorobenzyloxy group and others are given as an example.

As an aryloxy group, a phenoxy group is preferable and aforesaid aryl group may further have a substituent. Concrete examples thereof are a phenoxy group, a 3-methylphenoxy group, a 3-dodecylphenoxy group, a 4-methanesulfonamidephenoxy group, a 4-[.alpha.-(3'-pentadecylphenoxy)butaneamide]phenoxy group, a hexydecylcarbamoylmethoxy group, a 4-cyanophenoxy group, a 4-methanesulfonylphenoxy group, a 1-naphthyloxy group, a p-methoxyphenoxy group and others.

As a heterocyclicoxy group, a heterocyclicoxy group with 5-7 members is preferable and it may be a condensed ring and it may have a substituent. Concretely, a 1-phenyltetrazolyloxy group, a 2-benzthiazolyloxy group and others are given.

As aforesaid acyloxy group, an alkylcarbonyloxy group such as acetoxy group and a butanoloxy group, an alkenylcarbonyloxy group such as a cinnamoyloxy group and an arylcarbonyloxy group such