Abstract: A silver halide color photographic material which comprises a coupler is disclosed. The coupler is represented by a formula I or II, ##STR1## The meaning of each symbol is defined in the specification. The color photographic material of the invention gives a magenta image excellent in preserving stability.

Abstract: There are disclosed a novel cyan dye-forming coupler and a silver halide photographic light-sensitive material containing the novel coupler represented by the following Formulas I to V: ##STR1## wherein R represents a substituent; Y represents a substituent having a Hammett's substituent constant .sigma.p of not less than 0.3 and not more than 1.5; Z represents the group of atoms necessary to form a 5 to 7-membered nitrogen-containing heterocyclic ring; l, m and n are the integers of 0 to 4, 0 to 5 and 0 to 3, respectively; and X represents a hydrogen atom or a substituent capable of splitting off upon a reaction with an oxidation product of a developing agent.

Abstract: A compound used as a silver halide photographic light sensitive material for releasing a photographically useful group (PUG) by the reaction with an oxidized developing compound during the developing process is disclosed.The compound has several timing groups so that the releasing can be controlled by several steps of the reactions to meet a required timing.The compound can be modified with various kinds of substituents so that the width of the reacting area is controlled.

Abstract: A silver halide photographic light-sensitive material is disclosed. The light-sensitve material comprises a support having thereon a hydrophilic colloid containing a compound represented by the following Formula I as a colored coupler, ##STR1## wherein R.sup.1 is a substituent; R.sup.3 is a halogen atom or an alkoxy group; R.sup.2 is an acylamino group, a sulfonamido group, an imido group, a carbamoyl group, a sulfamoyl group, an alkoxycarbonyl group or an alkoxycarboxyamido group; m is an integer of 0 to 5 and n is an integer of 0 to 4. The light-sensitive material has a good color reproducibility caused by the masking effect of the colored coupler with less lossing in the speed.

Abstract: The improved silver halide photographic material has a substantially colorless coupler that has a leaving group with a protected formyl group at the active site, said protected formyl group being such that subsequent to the elimination of the leaving group upon coupling reaction, the protective group for a formyl group undergoes cleavage, causing reaction with an aromatic primary amine to form a ballasted Schiff type dye. The novel substantially colorless coupler is capable of highly efficient dye formation.

Abstract: There is disclosed a light-sensitive silver halide photographic material which comprises containing a compound having ##STR1## group at 4-position of a pyrazole ring, and having a residue of non-diffusion type coupler through an oxygen atom, a sulfur atom or an imino group at the 5-position of the same, wherein A represents a residue of 1-phenyl-3-pyrazolidone derivatives and p is 0 or 1.

Abstract: There is disclosed the silver halide light-sensitive color photographic material having an excellent dispersing stability in a silver halide emulsion, a satisfactory color formability and a sufficient maximum color density, and capable of providing a high reactivity or a high quality image, wherein the photographic material contains at least one selected from the couplers represented by Formulas I and II: ##STR1##

Abstract: A cyan coupler for color photographic use and, particularly, to a photographic coupler forming a dye image excellent in durability against heat, humidity and light is disclosed. A silver halide emulsion layer contains a compound represented by general formula 1, ##STR1## wherein R represents substituents; m represents an integer of 0 or 1 to 6, when m is 2 to 6, plurality of Rs are identical or different; Y and Z are substituents having a Hammett's substituent constant .sigma.p 0.3 to 1.5 and are identical or different; X represents a hydrogen atom or a substituent which is released by a reaction of an oxidized product of a color developing agent.

Abstract: A silver halide color photographic light-sensitive material containing novel pyrazolotriazole type magenta couler is disclosed. The coupler is represented by the following Formula I: ##STR1## wherein R.sub.1 is a primary-alkyl, a secondary-alkyl group or a tertiary-alkyl group; R.sub.2 is an aralkyl group represented by the following Formula II; and X is a substituent capable of splitting off upon reaction with the oxidation product of a color developing agent; ##STR2## whrein R.sub.3, R.sub.4, R.sub.5 and R.sub.6, are each a hydrogen atom or an alkyl group, provided that at least one of R.sub.3 and R.sub.4 is an alkyl group when R.sub.1 is a primary alkyl group; R.sub.7 is a group having a --COOM group, in which M is a hydrogen atom or a cation; and l is 0 or 1. The light-sensitive material is excellent in color forming efficiency and color reproducibility.

Abstract: A silver halide color photographic light-sensitive material is disclosed, which is improved in the color forming efficiency, the color reproducibility and the resistivity of color image against heat and humidity. The photographic material comprises a silver halide emulsion layer which contains a pyrazoloazole type cyan coupler having a group represented by Formula I which is directly bonded to the azole ring of the pyrazoloazole coupler:--(X.dbd.Y)n--R.sub.1 (I)wherein X and Y each is a substituted or unsubstituted methine group or a nitrogen atom; R.sub.1 is a hydrogen atom or a substituent; and n is an integer of 1 or 2, provided that two of Xs and two of Ys may be the same or different from each other when n is 2, and two of either X, Y and R.sub.1 are allowed to be bonded each other to form a ring other than benzene ring.

Abstract: A silver halide color photographic light-sensitive material is disclosed in which a novel yellow coupler represented by the following Formula I is contained. ##STR1## wherein R.sub.1 is a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group; R.sub.2 and R.sub.3 are each a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; X is a hydrogen atom, a halogen atom, an alkoxy group or an alkylamino group; Y, B.sub.1 and B.sub.2 are each a substituent; and m and n are each an integer of zero to 3.

Abstract: A silver halide light-sensitive color photographic material which comprises a coupler represented by formula [I]; ##STR1## wherein A represents a coupler residue that is capable of releasing the remaining group of said coupler upon reaction with an oxidation product of a developing agent; L represents a timing group which is capable of releasing the rest of the group after said remaining group being released from A; n represents 0 or 1; X represents an oxygen or sulfur atom; Y represents a --NHSO.sub.2 R.sub.1 ' group, a ##STR2## group or a --NHCOR.sub.1 ' group, in which formulas R.sub.1 ' and R.sub.2 ' independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R.sub.1 and R.sub.2 independently represent a hydrogen atom, an aliphatic group, an aromatic group or a heterocyclic group; R.sub.3 represents a substituent group; m represents 0, 1 or 2, provided that when m is 2, two R.sub.3 s may be different, and that two of R.sub.1, R.sub.2 and R.sub.3 or two of R.sub.

Abstract: A silver halide color photographic light-sensitive material comprising a silver halide emulsion layer containing a cyan coupler represented by the following general formula [I]. The color photographic material is improved in sensitivity, density of cyan image, density losing of cyan image due to processing by a fatigued bleach or bleach-fix solution.

Abstract: A silver halide photographic material containing at least one of couplers represented by the general formula [I] and at least one of the compounds represented by the general formula [XII] is disclosed. ##STR1## wherein Z is a group of nonmetal atoms necessary to complete a nitrogen-containing heterocyclic ring where the ring formed by Z may be substituted; X is a hydrogen atom or a substituent capable of being released upon reaction with the oxidation product of a color developing agent and R is a hydrogen atom or substituent; ##STR2## wherein R.sub.21 is a hydrogen atom or a group selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group and aryl group, R.sub.22 and R.sub.23 are independently selected from the group consisting of an alkyl group, an alkenyl group, a cycloalkyl group and an aryl group.The photographic material provides a dye-image highly stable against heat and light, and a formation of stain at a non-image area is prevented.

Abstract: A silver halide photographic light-sensitive material containing a 1H-pyrazolo[3,2-c]-s-triazole type magenta coupler is disclosed. The magenta coupler has an --SO.sub.2 -- group and at least one group selected from the group consisting of a --COOM group and a --SO.sub.3 M group, M being a hydrogen atom or a cation, in its molecule. The photographic material is improved in color development performance and preservability of magenta images.

Abstract: Silver halide photographic light-sensitive material comprising a support having a plurality of silver halide emulsion layers which are sensitive to the same spectral region and having different speeds and at least one light-sensitive layer comprising a nondiffusible coupler, which upon reaction with an oxidized product of a color developing agent is capable of forming a nondiffusible dye, wherein the silver halide emulsion layer having the greatest speed of said plurality of silver halide emulsion layers sensitive to a particular spectral region contains a nondiffusible coupler which, upon reaction with an oxidized product of a color developing agent, is capable of producing a moveable dye, and a silver halide emulsion having a speed slower than said fastest speed layer contains a nondiffusible compound which, upon reaction with an oxidized product of a color developing agent, is capable of releasing a development inhibitor material.

Abstract: There is disclosed a novel silver halide photosensitive color photographic material comprising a coupler which consists of a coupling component (A) which is capable of causing a coupling reaction with an oxidized color developing agent and a substituent component bonded at the coupling position of said coupling component (A), which substituent component is capable of being split off on coupling reaction, the improvement characterized in that said substituent comprises a coupling component (B) which can undergo coupling reaction with an oxidized color developing agent when released from said coupling component (A) and a photographically useful component which is capable of being released on coupling reaction of said coupling component (B).The color photographic material according to the present invention provides graininess, sharpness and color reproducibility which is sufficiently competent to the requirement of further miniturization of film size by use of a coupler having novel functions.

Abstract: The invention relates to silver halide photographic materials comprising a support and a light sensitive silver halide emulsion layer containing as a cyan-dye-forming coupler a compound of the formula ##STR1## wherein R.sub.1 is a halogen atom, an alkyl, alkoxy or acylamino group; R.sub.2 and R.sub.3 are individually a hydrogen atom, an alkyl or aryl group and R.sub.2 and R.sub.3 may form a heterocyclic group by the condensation thereof; n is an integer of 0-3; R.sub.4 is an alkyl, aryl, acyl or heterocyclic group; R.sub.5 is an alkyl, aryl, alkoxy, amino, acylamino, sulfonamide, carboxy, alkoxycarbonyl, carbamoyl, cyano or halogenated alkyl group; and R.sub.6 is a hydrogen atom or an alkyl, alkoxy, carboxy, carbamoyl, hydroxy, acyloxy, nitro, amino, azo, acylamino, sulfonamide or acyl group.

Abstract: A silver halide photographic light-sensitive material which comprises at least one of those pyrazole compounds represented by the following general formula: ##STR1## wherein A is a group which can be eliminated in a photographic process condition; X is ##STR2## wherein R.sub.5 is a hydrogen atom or an alkyl, an aryl, an acyl or a sulfone group, which R.sub.5 group may combine together with R.sub.1 to form a condensed ring; R.sub.1 is a hydrogen atom or an alkyl, an aryl, an acyl, a sulfone, an alkoxy, or a heterocyclic residue; R.sub.2 is a hydrogen atom or an alkyl, an aryl, an alkoxy, an amino, an acid amide, a sulfonamide, a carboxyl, an alkoxycarbonyl, a carbamoyl, a cyano, or a halogenated alkyl group, R.sub.3 and R.sub.