SILVER HALIDE LIGHT-SENSITIVE PHOTOGRAPHIC MATERIAL

Abstract: A silver halide light-sensitive photographic material which is excellent in the aptitude for rapid processing and highly sensitive and of which the sensitivity and gradation are stable against the change of the temperature at the time of exposure is disclosed. The silver-halide photographic material comprises a support and, provided thereon, a silver halide emulsion layer, wherein said silver halide emulsion layer contains silver chloro-halide grains containing not less than 90 mole % of silver chloride and having been chemically sensitised in the presence of a labile sulfur compound and a gold compound, and an organic compound of which solubility product (Ksp) with a silver ion is not more than 1 × 10 -11.0 , said organic compound having been added to said silver halide emulsion layer during the period between after the formation of said silver halide grains and before the completion of the chemical sensitization thereof.

Description: The present invention relates to a silver halide light-sensitive photographic material which has excellent rapid processing properties and is highly sensitive. The sensitivity and gradation are so stable that they are hardly affected by changes in temperature at the time of exposure. In recent years, the demand for high speed color developing has increased and various methods have been devised in order to meet such a demand. One method, where exposed silver halide light-sensitive photographic material is developed using an aromatic primary amine color developing agent, uses a color development accelerator. Examples of such color development accelerators are described in US Patent Nos. 2,950,970, 2,515,147, 2,496,903, 4,038,075, 4,119,462, British Patent Nos. 1,430,998 and 1,455,413, Japanese Patent Publication Open to Public Inspection (hereinafter referred to as Japanese Patent O.P.I. Publication) Nos. 15831/1978, 62450/1980, 62451/1980, 62452/1980, 62453/1980 and 12422/1976, and Japanese Patent Examined Publication Nos. 12422/1976 and 49728/1980. However, as a result of our investigations, we have found that most of these compounds are ineffective as development accelerators; those which show adequate development acceleration producing fogginess and thus being of no use practically. In an attempt to accelerate the permeation of a color developing agent into a silver halide light-sensitive photographic material, various permeating agents have been examined. For example, benzyl alcohol has been added to color developer solutions to accelerate color development. This method is extensively used. However, there is a problem if this method is used for rapid processing because processing must occur at as high a temperature as 33°C for more than three minutes in order to obtain adequately high color-formed densities. A method of increasing the pH concentration of color developer solutions to improve the color development has also been proposed. However, there are problems with this method. If, for example, the pH is raised to a minimum of 10.5, then oxidation of the color developing agent is significantly accelerated, or the color developing agent is subject to pH changes because no appropriate buffer solution is available, thus making it difficult to obtain stable photographic characteristics or increasing the dependence of the photographic characteristics upon processing time. Another method for making color development more rapid is described in, e.g., US Patent No. 3,719,492 in which a color developing agent is incorporated in advance into the light-sensitive material. However, this method, has the disadvantage that the silver halide light-sensitive photographic material containing the color developing agent has poor preservability, tends to fog before use and also at the time of being color-developed. Other methods involve making the amine portion of such color developing agents inactive, i.e. the color developing agent is made in the form of, for example, a Schiff's salt which is then incorporated into the light-sensitive material as described in, e.g., Us Patent No. 3,342,559 and Research Disclosure No. 15159 in 1976. These methods, however, have the disadvantage that color development starts only after alkali hydrolysis of the color developing agent, and thus color development is retarded. Japanese Patent O.P.I. Publication No. 64339/1981 discloses a method of incorporating 1-aryl-3-pyrazolidones into silver halide color photographic material; and Japanese Patent O.P.I. Publication Nos. 144547/1982, 50532/1983, 50533/1983, 50534/1983, 50535/1983 and 50536/1983 disclose that advance incorporation of 1-arylpyrazolidones into silver halide light-sensitive photographic material results in shorter development times. However, these techniques do not always give satisfactory results in respect of adequate color developing speed and the dye image having high color densities. Thus there is room for further improvement. It is known that the speed of color development may be increased by using either a silver chloride emulsion or a high silver chloride-content silver chlorobromide emulsion as the silver halide emulsion of a light-sensitive photographic material. Descriptions of this technique may be found in, e.g., U.S. Patent Nos. 4,183,756 and 4,225,666 and Japanese Patent O.P.I. Publication Nos. 26589/1980, 91444/1980, 95339/1983, 94340/1983, 95736/1983, 106538/1983, 107531/1983, 107532/1983, 107533/1983, 108533/1983 and 125612/1983. These techniques, although considered satisfactory for rapid processing, still do not provide adequate sensitivities, and the emulsion shows significant instability with respect to sensitivity and gradation when subjected to changes in the temperature at the time of exposure of the resulting light-sensitive material. Where a labile sulfur compound and a gold compound are used in the chemical sensitization of a high silver chloride-content emulsion the instability with respect to sensitivity and gradation due to changes in the temperature at the time of exposure increases; this is a large hindrance to practical use. As a result of our investigations to solve the above-mentioned problems, we have found unexpectedly that where a specific high silver chloride-content emulsion is chemically sensitized by using the above-mentioned labile sulfur compound and gold compound, and a specific mercapto-type compound is further applied to the emulsion, a stable silver halide light-sensitive photographic material whose sensitivity and gradation are hardly affected by changes in the temperature at the time of exposure is obtained. It is therefore an object of the present invention to provide a silver halide light-sensitive photographic material which has excellent rapid processing properties and is stable with respect to sensitivity and gradation, hardly being affected by changes in the temperature at the time of exposure. Accordingly the present invention provides a silver halide light-sensitive photographic material comprising a support and, provided thereon, a silver halide emulsion layer, wherein said silver halide emulsion layer contains silver chloro-halide grains containing not less than 90 mole% of silver chloride and having been chemically sensitized in the presence of a labile sulfur compound and gold compound and an organic compound represented by the formula [S]; wherein Q is a group of atoms necessary to complete a 5-membered or 6-membered heterocyclic ring or a benzene ring-condensed 5-membered or 6-membered heterocyclic ring, and M is a hydrogen atom or a cation, wherein said organic compound has a solubility product (Ksp) with a silver ion of not more than 1 x 10 -11.0 , said organic compound having been added to said silver halide emulsion layer during the period after the formation of said silver halide grains and before the completion of the chemical sensitization thereof. In the silver halide light-sensitive photographic material used in this invention, the silver halide grains contained in the at least one silver halide emulsion layer thereof are silver halide grains whose silver chloride content is at least 90 mole%, the preferred silver chloride content being in the range of from 99.0 mole% to 99.9 mole%. The silver halide used in this invention is typically one of silver chlorobromide, silver iodochloride, silver chloroiodobromide or silver chloride. Although silver iodide may be present in the silver halide, the silver iodide content is preferably not more than 1 mole%, more preferably not more than 0.5 mole%, and most preferably zero mole%. The silver halide is preferably silver chlorobromide or silver chloride, and more preferably silver chlorobromide having the above-mentioned silver chloride content. The silver halide grains used in this invention may be mixed with other silver halide grains, but in this case, the proportion of the projection area occupied by the silver halide grains used in this invention to the projection area occupied by all the silver halide grains is preferably at least 50%, and more preferably at least 75%. The silver halide grains used in this invention may be formed as described in, e.g., Japanese Patent O.P.I. Publication Nos. 162540/1984, 48755/1984, 222844/1985, 222845/1984 and 136735/1985. The grain size of the silver halide grain used in this invention, is preferably 0.2µm to 1.6µm, and is more preferably 0.25µm to 1.2µm. The grain size may be measured for example as described in Loveland "Analytical Methods for Grain Sizes", A.S.T.M. Symposium on Light Microscopy, 1955, pp. 94-122, and in Section II of, Mees and James, "Theory of the Photographic Process" 3rd ed., MacMillan (1966). The grain size may be measured using the projection area or an approximate value of the diameter of the grain. If silver halide grain sizes are of a substantially uniform conformation, the grain size distribution of such grains can be fairly precisely expressed using their diameters or projection areas. The grain size distribution of the silver halide grains used in this invention may be either monodisperse or polydisperse. The silver halide grains used are preferably monodisperse silver halide grains which, in the grain size distribution of the grains, have a coefficient of variation of not more than 22%, and preferably not more that 15%, wherein the coefficient of variation is the percentage of the quotient obtained by dividing the standard deviation of the grain size distribution by the average grain size (the arithmetic mean value of train sizes). The term "the grain size", as used herein, in the case of a spherical silver halide grain, is its diameter and, in the case of a cubic or nonspherical silver halide grain, is the diameter of a circular image corresponding to its projection image. The silver halide grains may be obtained by any acidic method, neutral method or ammoniacal method. The grains may be grown at a time or may, after preparing seed grains, be grown from the seed grains. The procedures for preparing seed grains and then growing them may be either the same or different. The procedure for making a water-soluble silver salt react with a water-soluble halide may be the orderly mixing method, the inverse mixing method, the simultaneous mixing method, or a combination of these methods. Of these methods, the simultaneous mixing method is preferred, one form of which, the pAg-controlled double jet method, is described in Japanese Patent O.P.I. Publication No. 48521/1979. If necessary, a silver halide solvent such as thioether, a crystal habit control agent such as a mercapto group-containing compound or a sensitizing dye may also be used. The silver halide grain used in this invention may take any conformation. A preferred conformation is a cube having a (100) face as a crystal surface. The grain may be, for example, octahedral, tetradecahedral or dodecahedral in form, produced as described in, for example, US Patent Nos. 4,183,756 and 4,225,666, Japanese Patent O.P.I. Publication No. 26589/1980, Japanese Patent Examined Publication No. 42737/1980, and "The Journal of Photographic Science" 21 , 39 (1973). The silver halide grains may comprise grains having a single conformation or a mixture of different conformations. The silver halide grains used in this invention may have metallic ions present internally and/or on the surface. They may be produced by adding thereto a cadmium salt, zinc salt, lead salt, thallium salt, iridium salt or complex salt, rhodium salt or complex salt, or iron salt or complex salt during the course of forming and/or growing the grain. Additionally the silver halide grains may have internally and/or on the surface a reduction sensitization nucleus which is produced by placing the grains in an appropriate reductive atmosphere. The emulsion used in this invention may either have the unused water-soluble salts removed after completion of the growth of silver halide grains or the salts may remain. The methods for removal of such salts are described in Research Disclosure 17643. A silver halide grain used in this invention may have either a latent image formed principally on its surface or have a latent image formed principally thereinside, although it is preferable to have a latent image formed principally on its surface. In the present invention, the silver halide emulsion containing the above-mentioned silver halide grains is an emulsion chemically sensitized in the presence of both a labile sulfur compound and a gold compound, and the emulsion additionally contains at least one organic compound having a solubility product (Ksp) between it and silver ions, of 1x10 -11.0 the compound being added during the period between formation of the silver halide grains and completion of the chemical sensitization. Compounds having a Ksp value exceeding 1x10 -11.0 , i.e., a compound less capable of forming a salt with silver ions than the specified compounds, is of no use in this invention. The measurement and calculation of the solubility product may be carried, for example, out as described in "Shin Jikken Kagaku Koza (New Experimental Chemistry Course) Vol. 1" (Maruzen Ltd.) pp. 233-250. In the present invention, the above-mentioned organic compound having a Ksp value of not more than 1x10 -11.0 (hereinafter referred to as the organic compound used in this invention) is preferably a compound having the following Formula [S]: wherein Q is a 5-member or 6-member heterocyclic ring or a benzene ring-condensed 5-member or 6-member heterocyclic ring, and M is a hydrogen atom or a cation. Suitable mercapto compounds represented by Formula [S], are described below: In Formula [S], the Q, as mentioned above, represents a 5-member or 6-member heterocyclic ring or a benzene ring-condensed 5-member or 6-member heterocyclic ring. Examples of the heterocyclic ring represented by Q include imidazole, tetrazole, thiazole, oxazole, selenazole, benzimidazole, naphthoimidazole, benzothiazole, naphthothiazole, benzoselenazole, naphthoselenazole or benzoxazole. Examples of the cation represented by M include alkali metal ions (such as a sodium, or potassium ion) or an ammonium group. Preferred mercapto compounds of Formula [S] are those having the following Formulae [SA], [SB], [SC] and [SD]: wherein R A is a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a halogen atom, a carboxyl group or a salt thereof, a sulfo group or a salt thereof, or an amino group; Z is -NH-, -O- , or -S-; and M is as defined in Formula [S]. wherein Ar represents R B is an alkyl group, an alkoxy group, a carboxyl group or a salt thereof, a sulfo group or a salt thereof, a hydroxyl group, an amino group, an acylamino group, a carbamoyl group or a sulfonamido group; n is an integer of 0 to 2: and M is as defined in Formula [S]. In Formulas [SA] and [SB], the alkyl group represented by the R A or R B is, for example, methyl, ethyl or butyl, and the alkoxy group is, for example, methoxy or ethoxy, and the salt of the carboxyl or sulfo group is, for example, a sodium or ammonium salt. In Formula [SA], the aryl group represented by the R A is, for example, phenyl or naphthyl, and the halogen atom is, for example, chlorine, or bromine. In Formula [SB], the acylamino group represented by the R B is, for example, methylcarbonylamino or benzoylamino and the carbamoyl group is, for example, ethylcarbamoyl or phenylcarbamoyl, and the sulfonamido group is, for example, methylsulfonamido or phenylsulfonamido. The above-mentioned alkyl, alkoxy, aryl, amino, acylamino, carbamoyl and sulfonamido groups include those which have another substituent. wherein Z is a group, an oxygen atom or a sulfur atom; R is a hydrogen atom, an alkyl group, an aryl group, an alkenyl group, a cycloalkyl group, a -SR A1 group, a group, NHCOR A4 group, a -NHSO₂R A5 or a heterocyclic group; R A1 is a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a -COR A1 group, or a -SO²R A5 group; R A2 and R A3 each is a hydrogen atom, an alkyl group or an aryl group; R A4 and R A5 each is an alkyl group or an aryl group; and M is as defined in Formula [S]. The alkyl group represented by the RA, RA1, RA2, RA3, RA4 or RA5 in Formula [SC] is, for example, methyl, benzyl, ethyl, or propyl, and the aryl group is phenyl or naphthyl. The alkenyl group represented by RA or RA1 is, for example, propenyl and the cycloalkyl group is, for example, cyclohexyl, and the heterocylic group represented by the R A is, for example, furyl, or pyridinyl. The alkyl and aryl groups represented by R A , R A1 , R A2 , R A3 , R A4 and R A5 , the alkenyl and cycloalkyl groups represented by the R A and R A1 and the heterocyclic groups represented by the R A include those having a further substituent. wherein R A and M represent the same groups as defined in Formula [SC]; and R B1 and R B2 represent the same groups as defined in the R A1 and R B2 , respectively, of Formula [SC], provided that the R B1 and R B2 are able to form a ring by combining with each other. The following are examples of the compounds represented by Formula [S]. The compounds represented by the above Formula [S] include those compounds described in, e.g.. Japanese Patent Examined Publication No. 28496/1965; Japanese Patent O.P.I. Publication No. 89034/1975; J. Chem. Soc. 49, 1748 (1927) and 42378 (1952); J. Org. Chem. 39, 2469 (1965); U.S. Patent No. 2,482,001; J. Chem. Soc. 1723 (1951); Japanese Patent O.P.I. Publication No. 111846/1981; British Patent No. 1,275,701; U.S. Patent Nos. 3,266,897 and 2,403,927, and these compounds may be synthesized according to the methods described in these publications. In order to incorporate any of the compounds of Formula [S] (hereinafter referred to as Compounds [S]) into a silver halide emulsion layer containing the silver halide grains of this invention, the compound is first dissolved into water or an organic solvent which is miscible with water (such as methanol or ethanol), and then the solution is added to the emulsion. Compounds [S] may be used alone, or two or more different compounds having the same Formula [S] may be used in combination, or these may be used in combination with other stabilizers or antifoggants not belonging to Formula [S]. The addition of Compounds [S] may be made at any point during the period from immediately after the formation of the silver halide grains up to completion of the chemical sensitization, and preferably soon after the commencement of the chemical sensitization following the formation of the grains. Compounds [S] may be added either all at once or by several installments. The amount of Compounds [S] added, although not restricted, is normally from 1x10⁻⁶ mole to 1x10⁻¹ mole per mole of silver halide, and preferably from 1x10⁻⁵ mole to 1x10⁻² mole. The silver halide grains used in this invention are chemically sensitized in the presence of both a labile sulfur compound and a gold compound. The labile sulfur compound and gold compound to be used in this invention will be described below: The labile sulfur compound to be used in this invention is a sulfur-containing compound that forms a silver salt on reaction with a silver halide, and further is such as to form silver sulfide under strong alkaline conditions, Examples of suitable compounds include thiosulfates, arylthiocarbamides, thioureas, arylisothiocyanates or cystines. The quantity of labile sulfur compound depends on the conditions, but is preferably in the range of from 1x10⁻⁷ mole to 1x10⁻¹ mole per mole of silver halide, more preferably from 1x10⁻⁷ mole to 1x10⁻⁵ mole, and most preferably from 2x10⁻⁶ mole to 8x10⁻⁶ mole. The above sulfur sensitizer, can be incorporated into the emulsion, by dissolving in water or in an alcohol such as methanol or ethanol, and then adding the solution to the emulsion. Examples of the gold compound to be used in the silver halide emulsion include chloroauric acid, sodium chloroaurate, or gold-potassium thiosulfate. The quantity of the gold compound to be used is preferably from 5x10⁻⁷ to 5x10⁻³ mole per mole of silver halide, more preferably from 2x10⁻⁶ to 1x10⁻⁴ mole, even more preferably from 2.6x10⁻⁶ to 4x10⁻⁵ mole, and most preferably from 2.6x10⁻⁶ to 9x10⁻⁶ mole. The gold compound may be added during the period immediately after the formation of the silver halide grains up to completion of the chemical sensitization. Both the labile sulfur compound and the gold compound used in this invention are present during chemical sensitization of the high silver chloride-content silver halide grains used in this invention; preferably, they are present during the period immediately after the formation of the above grains up to completion of the chemical sensitization. In the present invention the silver halide emulsion containing the high silver chloride-content silver halide emulsion is chemically sensitized in the presence of both the labile sulfur compound and the gold compound, and the organic compound used in this invention. As far as chemical sensitization is concerned, methods therefor are described in, for example, British Patent No. 1,315,755, Japanese Patent O.P.I. Publication Nos. 126526/1983 and 232545/1985. These publications relate only to high silver bromide-content silver chlorobromide or iodobromide grains. With regard to the organic compound used in this invention, it is well known to skilled workers to add an organic compound, for the purpose of preventing a silver halide light-sensitive material from fogging or for improving the time stability or preservability of the light-sensitive material, to the emulsion at the time of completion of chemical sensitization or in the stage following the same (see eg U.S. Patent No.'s 4,088,494 and 4,043,817). Such a method, of adding the organic compound after the chemical sensitization, will not produce the effect of this invention. The emulsion used in this invention may be spectrally sensitized to any desired wavelength regions by using sensitizing dyes. Such sensitizing dyes may be used either alone or in combination. Together with sensitizing dyes, dyes which in themselves have no spectral sensitization function or those compounds which do not substantially absorb any visible light but function as supersensitizers to enhance the sensitizing effect of the sensitizing dyes may also be incorporated into the emulsion. Where the silver halide emulsion to be used is a blue-sensitive emulsion, it is preferred that the emulsion is spectrally sensitized using sensitizing dyes having the following Formula [A]: wherein Z₁₁ and Z₁₂ each is a group of atoms necessary to form a benzoxazole nucleus, a naphthoxazole nucleus, a benzoselenazole nucleus, a naphthoselenazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a benzimidazole nucleus, a naphthoimidazole nucleus, a pyridine nucleus or quinoline nucleus, and these heterocyclic rings may have a substituent, the substituent being selected from, for example, the a halogen atom, cyano group, methyl group, ethyl group, methoxy group or ethoxy group. R₂₁ and R₂₂ each is an alkyl group, an alkenyl group, or an aryl group, and is preferably an alkyl group, more preferably an alkyl group substituted by a carboxyl or sulfo group, and most preferably a sulfoalkyl group having 1 to 4 carbon atoms. And R₂₃ is a hydrogen atom or a methyl or ethyl group. X ⊖ is an anion, and l is an integer of 0 or 1. Of the sensitizing dyes having Formula [A], the particularly useful ones are those having the following Formula [A']: wherein Y₁ and Y₂ each is a group of atoms necessary to complete a benzene ring or a naphthalene ring, which may have a substituent, the substitent being preferably a halogen atom or a cyano, methyl, ethyl, methoxy or ethoxy group. R₂₁, R₂₂, R₂₃, X ⊖ and l are as defined in Formula [A]. The following are examples of the sensitizing dyes having Formula [A] which are suitable for use in this invention: Where the silver halide emulsion to be used is a green-sensitive emulsion, it is preferable that the emulsion is spectrally sensitized using sensitizing dyes having the following Formula [B]: wherein Z₁₁ and Z₁₂ each is a group of atoms necessary to form a benzene ring or a naphthalene ring to be condensed with the oxazole ring, provided that the heterocyclic nuclei to be formed each may have a substituent, the substituent being preferably a halogen atom, an aryl, alkyl or alkoxy group, more preferably a halogen atom, a phenyl or methoxy group, and most preferably a phenyl group. A suitable embodiment of this invention is such that Z₁₁ and Z₁₂ are benzene rings condensed with oxazole rings, and of these benzene rings at least one benzene ring is substituted at the 5th position thereof by a phenyl group, or one benzene ring is substituted at the 5th position thereof by a phenyl group and the other is substituted at the 5th position by a halogen atom. R₂₁ and R₂₂ each is an alkyl, alkenyl or aryl group, preferably an alkyl group, more preferably an alkyl group substituted by a carboxyl or sulfo group, and most preferably a sulfoalkyl group having from 1 to 4 carbon atoms, and further, most preferably a sulfoethyl group. R₂₃ is a hydrogen atom or an alkyl group having from 1 to 3 carbon atoms, and is preferably a hydrogen atom or an ethyl group. X₁ ⊖ represents an anion, for example, an ion of a halogen such as chlorine, bromine or iodine, or an anion such as CH₃SO₄⁻, or C₂H₅SO₄⁻, and n is an integer of 1 or 0, provided that when the compound forms an intramolecular salt, n is 0. The following are examples of the sensitizing dyes having Formula [B] which are suitable for use in this invention: Where the silver halide emulsion is to be used as a red-sensitive emulsion, it is preferable that the emulsion is spectrally sensitized by using sensitizing dyes having the Formula [C] or Formula [D]: In Formula [C] and Formula [D], R is a hydrogen atom or an alkyl group; R₁ and R₄ each is an alkyl group or an aryl group; Z₁, Z₂, Z₄ and Z₅ each is a group of atoms necessary to form a benzene or naphthalene ring condensed to a thiazole or selenazole ring; Z₃ is a group of hydrocarbon atoms necessary to form a 6-member ring; l is an integer of 1 or 2; Z is a sulfur atom or a selenium atom; and X ⊖ is an anion. In the above formulae, examples of alkyl groups represented by R include methyl, ethyl and propyl groups, and the R is preferably a hydrogen atom, or a methyl or ethyl group, and more preferably a hydrogen atom or an ethyl group. The R₁, R₂, R₃ and R₄ each is a straight-chain or branched-chain alkyl group (the alkyl group being allowed to have a substituent such as methyl, ethyl, propyl, chloroethyl, hydroxyethyl, methoxyethyl, acetoxyethyl, carboxymethyl, carboxyethyl, ethoxycarbonylmethyl, sulfoethyl, sulfopropyl, sulfobutyl, ß-hydroxy-γ-sulfopropyl, sulfate-propyl, allyl, or benzyl or aryl group (the aryl group is allowed to have a substituent such as phenyl, carboxyphenyl, or sulfophenyl); the heterocyclic nucleus formed by Z₁, Z₂, Z₄ or Z₅ may have a substituent which is preferably a halogen atom, or aryl or alkoxy group, and more preferably a halogen atom (e.g., a chlorine atom), phenyl group or methoxy group; and X ⊖ is an anion (e.g., Cl⁻, Br⁻, I⁻, CH³SO⁴⁻, or C²H⁵SO⁴⁻); and l is an integer of 1 or 2, provided that when the compound forms an intramolecular salt, l is 1). The following are typical of the sensitizing dyes having Formula [C] and Formula [D] which are suitable for use in this invention: The amount of sensitizing dyes having the above Formula [A], [B], [C] or [D], which is added, is preferably from 1x10⁻⁷ to 1x10⁻³ mole per mole of silver halide, and more preferably from 5x10⁻⁶ to 5x10⁻⁴ mole. The mode of addition of these sensitizing dyes is well known to those skilled in the art. For example, the sensitizing dye is first dissolved in water or a water-soluble solvent such as pyridine, methyl alcohol, ethyl alcohol, methyl cellosolve, or acetone (or a mixture of these solvents) or, the solution is diluted with water, and then, in the form of such a solution, the dye is incorporated into the emulsion. Ultrasonic oscillation may be used in dissolving such sensitizing dyes. Alternatively, the sensitizing dyes used in this invention may be added according to the method described in U.S. Patent No. 3,496,987 in which the dye is first dissolved into a volatile organic solvent, and the solution is then dispersed in hydrophilic colloid, and this dispersed product is added; or according to the method described in Japanese Patent Examined Publication No. 24185/1971 in which a water-insoluble dye, without being dissolved, is dispersed into a water-soluble solvent, and this dispersed liquid is then added. Also, the sensitizing dyes used in this invention may be added to the emulsion in the form of a dispersed product, prepared in accordance with the acid dissolution dispersion method, and addition methods, such as described in U.S. Patent Nos. 2,912,345, 3,342,605, 2,996,287 and 3,425,835, may be used. The sensitizing dyes to be incorporated into the emulsion may be dissolved in one solvent or different solvents, and these solutions may, prior to being added to the emulsion, either be mixed and then added or may be separately added to the emulsion. When they are to be added separately, the addition order, points of time, and time intervals may be settled arbitrarily according to the purpose. The addition of a sensitizing dye may be made at any point or points during the course of preparation of the emulsion, but preferably during or after chemical sensitization, more preferably during chemical sensitization. The silver halide light-sensitive photographic material used in this invention may be, for example, a color negative or positive film or color photographic paper. The silver halide light-sensitive photographic material used in this invention to be used as color photographic paper may be for either monochromatic or multicolor use. Where the photographic material is a multicolor silver halide light-sensitive photographic material, in order to carry out color reproduction according to the subtractive method, it has a structure usually comprising an appropriate number of silver halide emulsion layers containing various photographic couplers such as magenta, yellow and cyan couplers and non-light-sensitive layers provided by being superposed in an appropriate order on the support thereof. The number of such layers and the order of superposing the layers may be arbitrarily varied according to purposes for which the photographic material is used. Where the present invention is applied to a multicolor light-sensitive photographic material, the preferred layer construction is one having in order from the side of the support thereof an yellow dye image forming layer, intermediate layer, magenta dye image forming layer, intermediate layer, cyan dye image forming layer, intermediate layer and protective layer. Typical dye image forming couplers for use in the silver halide light-sensitive photographic material of this invention, are as described in the following patent specifications: Examples of the yellow dye image forming couplers which may be used in this invention include the acylacetamide-type and benzoylmethane-type 4-equivalent or 2-equivalent couplers as described in, e.g., U.S. Patent Nos. 2,778,658, 2,875,057, 2,908,573, 2,908,513, 3,227,155, 3,227,550, 3,253,924, 3,265,506, 3,277,155, 3,341,331, 3,369,895, 3,384,657, 3,408,194, 3,415,652, 3,447,928, 3,551,155, 3,582,322 and 3,725,072, West German Patent Nos. 1,547,868, 2,057,941, 2,162,899, 2,163,812, 2,213,461, 2,219,917, 2,261,361 and 2,263,875, Japanese Patent Examined Publication No. 13576/1974, Japanese Patent O.P.I. Publication Nos. 29432/1973, 66834/1973, 10736/1974, 122335/1974, 28834/1975, 132926/1975, 144240/1980 and 87041/1981. Examples of the magenta dye image forming couplers which may be used this invention include the 5-pyrazolone-type, pyrazolotriazole-type, pyrazolinobenzimidazole-type, indazolone-type and cyano-acetyl-type 4-equivalent or 2-equivalent magenta dye image forming couplers as described in, e.g., U.S. Patent Nos. 2,600,788, 3,061,432, 3,062,653, 3,127,269, 3,311,476, 3,152,896, 3,419,391, 3,519,429, 3,555,318, 3,684,514, 3,705,896, 3,888,680, 3,907,571, 3,928,044, 3,930,861, 3,930,816 and 3,933,500, Japanese Patent O.P.I. Publication Nos. 29639/1974, 111631/1974, 129538/1974, 112341/1976, 58922/1977, 62454/1980, 118034/1980, 38643/1981 and 135841/1981, Japanese Patent Examined Publication Nos. 34937/1977, 29421/1980 and 35696/1980, British Patent No. 1,247,493, Belgian Patent No. 769,116, West German Patent No. 2,156,111, Japanese Patent Examined Publication No. 60479/1971, Japanese Patent O.P.I. Publication Nos. 125732/1984, 228252/1984, 162548/1984, 171956/1984, 33552/1985 and 43659/1985, West German Patent No. 1,071,030, and U.S. Patent No.3,725,067. Typical examples of the cyan dye image forming couplers which may be used in this invention include the phenol-type and naphthol-type 4-equivalent or 2-equivalent cyan dye image forming couplers as described in, e.g., U.S. Patent Nos. 2,306,410, 2,356,475, 2,362,598, 2,367,531, 2,369,929, 2,423,730, 2,474,293, 2,476,008, 2,498,466, 2,545,687, 2,728,660, 2,772,162, 2,895,826, 2,976,146, 3,002,836, 3,419,390, 3,446,622, 3,476,563, 3,737,316, 3,758,308 and 3,839,044, British Patent Nos. 478,991, 945,542, 1,084,480, 1,377,233, 1,388,024 and 1,543,040, and Japanese Patent O.P.I. Publication Nos. 37425/1972, 10135/1975, 25228/1975, 112038/1975, 117422/1975, 130441/1975, 6551/1976, 37647/1976, 52826/1976, 108841/1976, 109630/1978, 48237/1979, 66129/1979, 131931/1979, 32071/1980, 146050/1984, 31953/1984 and 117249/1985. It is preferred that these dye forming couplers have a group called a ballasting group having not less than 8 carbon atoms capable of making the coupler non-diffusible. These dye forming couplers may be either a 4-equivalent type, requiring 4 silver ions to be reduced for the formation of one molecular dye, or a 2-equivalent type, requiring only two silver ions to be reduced for the formation of one molecular dye. The binder (or protective colloid) of the silver halide light-sensitive photographic material used in this invention may be, for example, gelatin or gelatin derivatives, graft polymers of gelatin with other high molecular materials, proteins, sugar derivatives, cellulose derivatives, or hydrophilic colloids such as synthetic hydrophilic high molecular materials being homo- or copolymers. The silver halide light-sensitive photographic material used in this invention may also comprise additives such as a hardening agent, anticolor-turbidity agent, image stabilizer, ultraviolet absorbing agent, plasticizer, latex, suface active agent, matting agent, lubricant, or antistatic agent. The silver halide light-sensitive photographic material used in this invention is capable of forming a dye image by being processed by color developing methods known to those skilled in the art. The color developing agent to be used in a color developer solution for use in developing the silver halide light-sensitive photographic material includes those aminophenol-type and p-phenylenediamine-type derivatives which are generally extensively used for various color photographic processes. The color developer solution for use in color-developing the silver halide light-sensitive material may contain, in addition to the above primary aromatic amine-type color developing agent, other known compounds. The pH value of the color developer solution is normally at least 7, and is generally about 10 to 13. The color developing temperature is normally at least 15°C, and is generally from 20 to 50°C., but, for rapid processing, it is preferably at least 30°C. While conventional developing takes from 3 to 4 minutes, the color developing time of the silver halide light-sensitive photographic material which is intended for rapid processing use, is preferably in the range of 20 seconds to 60 seconds, and more preferably in the range of 30 seconds to 50 seconds. The silver halide light-sensitive photographic material used in this invention, after being color-developed, is bleached and fixed. Bleaching and fixing may take place simultaneously. The fixing process is usually followed by a washing process. In lieu of the washing process, a stabilization process may be applied, or both processes may be used in combination. As has been described above, the silver halide light-sensitive photographic material used in this invention has excellent rapid processing properties, has a high sensitivity, and sensitivity and gradation is hardly affected by changes in temperature at the time of exposure. EXAMPLES The present invention will be illustrated further in detail by the following Examples. EXAMPLE-1 Aqueous halide solutions comprising aqueous silver nitrate solutions, potassium bromide and sodium chloride were mixed at 60°C and at pAg=7.0 in the presence of inert gelatin, using the method described in Japanese Patent O.P.I. Publication No. 45437/1984, to give a monodisperse silver chlorobromide emulsion (EM-1) containing 50 mole% silver chloride. The EM-1, observed through an electron microscope, comprised silver halide grains in the cubic form whose average grain size (in sphere equivalent) was 0.71 µm. Subsequently, at pAg=7.3, a 95 mole% silver chloride-containing silver chlorobromide emulsion (EM-2), a 99.5 mole% silver chloride-containing silver chlorobromide emulsion (EM-3) and a 100 mole% silver chloride-content silver chloride emulsion (EM-4) were prepared. The silver halide grains of these emulsions were each in the cubic form, and their average grain size was 0.70 µm for EM-2, 0.68 µm for EM-3 and 0.73 µm for EM-4. Each of EM-1, EM-2, EM-3 and EM-4 was subjected to the following four addition treatments: To each of the emulsions (1) sodium thiosulfate was added, (2) sodium thiosulfate and chloroauric acid were added, (3) an organic compound of this invention (Exemplified Compound No. SB-5, whose solubility product with silver ions: 1x10⁻¹⁴) was added immediately before the chemical sensitization thereof, and then sodium thiosulfate was added, and (4) the organic compound used in this invention (SB-5) was added immediately before the chemical sensitization thereof, and further sodium thiosulfate and chloroauric acid were added. Each of the emulsions was then spectrally sensitized using a blue-sensitizing dye (Exemplified Compound No. A-12), and after completion of chemical sensitization, to each was added, 1x10⁻² mole per mole of silver halide, another organic compound of this invention (Exemplified Compound No. SB-2, whose solubility product with silver ions: 1x10 -14.5 ), whereby emulsions No. EMB-1 through EMB-16 as given in Table-1 were prepared. The amounts of the above-mentioned sodium thiosulfate, chloroauric acid and organic compound added (Exemplified Compound No. SB-5) are also given in Table-1. Blue-sensitive EM No. Un-chemically ripened emulsion Added amt of sodium thiosulfate (mol/mol AgX) Added amt of chloroauric acid (mol/mol AgX) Added amt of organic cpd used in this invention (mol/mol AgX) EMB-1 EM-1 3.5x10⁻⁶ -- -- EMB-2 EM-1 3.5x10⁻⁶ 2.7x10⁻⁶ -- EMB-3 EM-1 3.5x10⁻⁶ -- 1.0x10⁻⁴ EMB-4 EM-1 3.5x10⁻⁶ 2.7x10⁻⁶ 1.0x10⁻⁴ EMB-5 EM-2 3.5x10⁻⁶ -- -- EMB-6 EM-2 3.5x10⁻⁶ 2.7x10⁻⁶ -- EMB-7 EM-2 3.5x10⁻⁶ -- 1.0x10⁻⁴ EMB-8 EM-2 3.5x10⁻⁶ 2.7x10⁻⁶ 1.0x10⁻⁴ EMB-9 EM-3 3.5x10⁻⁶ -- -- EMB-10 EM-3 3.5x10⁻⁶ 2.7x10⁻⁶ -- EMB-11 EM-3 3.5x10⁻⁶ -- 1.0x10⁻⁴ EMB-12 EM-3 3.5x10⁻⁶ 2.7x10⁻⁶ 1.0x10⁻⁴ EMB-13 EM-4 3.5x10⁻⁶ -- -- EMB-14 EM-4 3.5x10⁻⁶ 2.7x10⁻⁶ -- EMB-15 EM-4 3.5x10⁻⁶ -- 1.0x10⁻⁴ EMB-16 EM-4 3.5x10⁻⁶ 2.7x10⁻⁶ 1.0x10⁻⁴ Subsequently, emulsions EMB-1 to EMB-16 were used as blue-sensitive emulsions to prepare the following silver halide light-sensitive photographic materials, regarded as Sample-1 to Sample-16. Each of prepared Samples 1 to 16 was subjected to sensitometric evaluation according to the following procedure: [Sensitometric Evaluation] Each sample was subjected to exposures, through an optical wedge, to a white light by using a sensitometer (Model KS-7, manufactured by Konishiroku Photo Industry Co., Ltd.), the exposures being made at temperatures of 10°C, 20°C and 30°C. Each sample was then processed by the following procedure: [Processing Steps] Temperature Time Color developing 34.7 ± 0.3°C 45 seconds Bleach-fix 34.7 ± 0.5°C 45 seconds Stabilizing 30 - 34°C 90 seconds Drying 60 - 80°C 60 seconds (Color Developer Solution) Pure water 800 ml Ethylene glycol 10 ml N,N-diethylhydroxylamine 10 g Potassium chloride 2 g N-ethyl-N-β-methanesulfonamidoethyl-3-methyl-4-aminoaniline nitrate 5 g Sodium tetrapolyphosphate 2 g Potassium carbonate 30 g Brightening agent (4,4-diaminostilbenedisulfonic acid derivative) 1 g Water to make 1 liter. Adjust the pH to 10.8. (Bleach-Fix Bath) Ferric-ammonium ethylenediaminetetraacetate, dihydrated 60 g Ethylenediaminetetraacetic acid 3 g Ammonium thiosulfate (70% solution) 100 ml Ammonium sulfite (40% solution) 27.5 ml Use potassium carbonate or glacial acetic acid to adjust the pH to 7.1, and add water to make 1 liter. (Stabilizer Solution) 5-Chloro-2-methyl-4-isothiazoline-3-one 1 g 1-Hydroxyethylidene-1,1-diphosphonic acid 2 g Water to make 1 liter. Use sulfuric acid or potassium hydroxide to adjust the pH to 7.0. Each of the obtained samples was measured with respect to the reflection density thereof by using a densitometer PDA-65 (manufactured by Konishiroku Photo Industry Co., Ltd.). The sensitivity of each sample was expressed in terms of the reciprocal of the exposure necessary to obtain a density of 0.8, and given as a value relative to the sensitivity regarded as 100 of Sample-1 exposed at a temperature of 10°C. The gradation of each sample was given in terms of a tangent value for the inclination of a line connected between the density points 0.5 and 1.5 on the characteristic curve. The results obtained are given in Table 2. In the table, the 'D max' represents the maximum reflection density of each sample. Sample No. Temperature at the time of exposure ▵ Sensitivity (30°C -10°C D max 10°C 20°C 30°C Sensitivity Gradation Sensitivity Gradation Sensitivity Gradation 1 (Com.) 100 2.97 115 3.03 128 3.10 28 2.01 2 ( '' ) 142 2.85 159 2.91 171 2.98 29 2.04 3 ( '' ) 125 2.90 133 2.95 146 2.99 21 1.99 4 ( '' ) 180 2.82 192 2.84 203 2.87 23 2.03 5 ( '' ) 61 3.03 88 3.21 115 3.35 54 2.43 6 ( '' ) 103 3.09 141 3.29 169 3.42 66 2.45 7 ( '' ) 76 3.12 84 3.17 95 3.26 19 2.38 8 (Inv.) 149 3.15 155 3.18 163 3.20 14 2.46 9 (Com.) 59 3.11 90 3.30 109 3.39 50 2.40 10 ( '' ) 100 3.07 135 3.19 171 3.31 71 2.41 11 ( '' ) 85 3.10 94 3.21 102 3.29 17 2.43 12 (Inv.) 152 3.11 159 3.15 161 3.17 9 2.49 13 (Com.) 51 3.14 72 3.29 99 3.38 48 2.44 14 ( '' ) 102 3.01 133 3.17 169 3.30 67 2.45 15 ( '' ) 81 3.05 86 3.09 95 3.15 14 2.38 16 (Inv.) 118 3.17 124 3.22 136 3.25 18 2.47 Note: 'Com.' ....Comparative sample 'inv.' ....Sample of this invention As is apparent from the results given in Table-2, Samples No.1 to No.4, which use the high silver bromide-content emulsions EMB-1 to EMB-4 are highly sensitive and stable in relation to their dependence upon temperature, but have low maximum densities and have poor rapid processing properties. Although those using the high silver chloride-content silver halide grains used in this invention are satisfactory with respect to the aptitude for rapid processing properties, Samples Nos. 5, 9 and 13, obtained by adding sodium thiosulfate alone to the silver halide grains used in this invention, are poor in sensitivity and largely affected sensitivity and gradation are greatly affected by changes in the temperature at the time of exposure. Samples Nos.6, 10 and 14, obtained by adding not only sodium thiosulfate but also the gold compound, although improved in respect to sensitivity as compared to Samples Nos.5, 9 and 13, are significantly affected in relation to sensitivity and gradation by changes in the temperature at the time of exposure. Further, Samples Nos.7, 11 and 15, obtained by adding the organic compound used in this invention and sodium thiosulfate, are so improved as to be less affected by the temperature at the time of exposure but have low sensitivities. Only Samples Nos.8, 12 and 16 for this invention have excellent maximum densities as well as excellent rapid processing properties, and show high sensitivities and little fluctuation of both sensitivity and gradation due to changes in the temperature at the time of exposure. Of all the samples comprising high silver chloride-content silver halide grains used in this invention, Sample No.12, which uses silver halide grains containing 0.5 mole% silver bromide, shows the most significant effect of this invention. EXAMPLE-2 As in Example-1, silver chlorobromide containing 99.3 mole% silver chloride and comprising silver halide cubic grains having a grain size of 0.35 µm was prepared. To this were added sodium thiosulfate and chloroauric acid in the amounts given in Table-3, and two minutes later an organic compound was added (Exemplified Compound No. SB-5) in varying quantities. After this, each of the respective emulsions was optimally ripened and further color-sensitized by using a green-sensitizing dye (B-4), and to this, at the time of completion of the chemical sensitization, was added 1x10⁻² mole per mole of silver halide of the organic compound used in this invention (No. SB-5), whereby green-sensitive emulsions EMG-1 to EMG-10 were prepared. Samples No. 17 to No. 26 were then prepared as in Example-1 except that the hereinafter mentioned CM-1 as a magenta coupler was used. These samples were each tested by varying the temperature at the time of exposure and evaluated in the same manner as in Example-1. The results are as given in Table-4. Sample No. Green-sensitive EM No. Added amt of sodium thiosulfate (mol/mol AgX) Added amt of chloroauric acid (mol/mol AgX) Added amt of organic cpd of this invention (mol/mol AgX) 17 (Com.) EMG-1 4.6x10⁻⁶ 3.5x10⁻⁶ -- 18 (Inv.) EMG-2 4.0x10⁻⁵ 3.5x10⁻⁶ 1.5x10⁻⁴ 19 ( '' ) EMG-3 4.0x10⁻⁶ 3.5x10⁻⁶ 1.5x10⁻⁴ 20 ( '' ) EMG-4 4.0x10⁻⁶ 1.0x10⁻⁶ 1.5x10⁻⁴ 21 ( '' ) EMG-5 4.0x10⁻⁶ 1.5x10⁻⁵ 1.5x10⁻⁴ 22 ( '' ) EMG-6 4.0x10⁻⁶ 2.5x10⁻⁶ 1.5x10⁻⁴ 23 ( '' ) EMG-7 4.0x10⁻⁶ 2.5x10⁻⁶ 5x10⁻⁵ 24 ( '' ) EMG-8 4.0x10⁻⁶ 2.5x10⁻⁶ 5x10⁻³ 25 ( '' ) EMG-9 4.0x10⁻⁶ 2.5x10⁻⁶ 2x10⁻⁴ 26 ( '' ) EMG-10 4.0x10⁻⁶ 2.5x10⁻⁶ 3x10⁻⁴ Sample No. Temperature at the time of exposure ▵ Sensitivity (30°C - 20°C) 10°C 20°C 30°C Sensitivity Gradation Sensitivity Gradation Sensitivity Gradation 17 (Com.) 100 3.45 141 3.72 169 3.91 69 18 (Inv.) 83 3.50 89 3.53 97 3.59 14 19 ( '' ) 121 3.48 130 3.52 133 3.56 12 20 ( '' ) 139 3.38 148 3.49 164 3.57 25 21 ( '' ) 97 3.51 110 3.60 126 3.72 29 22 ( '' ) 140 3.47 143 3.53 150 3.56 10 23 ( '' ) 132 3.55 147 3.67 164 3.78 32 24 ( '' ) 72 3.49 79 3.53 87 3.56 15 25 ( '' ) 130 3.54 134 3.58 139 3.62 9 26 ( '' ) 128 3.51 131 3.55 139 3.56 11 As is apparent from Table-4, even in the green-sensitive emulsion layer, Samples Nos. 18 to 26 are stable with respect to sensitivity and gradation against changes in the temperature at the time of exposure. Of these samples, Samples Nos. 19, 22, 25 and 26 are especially highly sensitive and highly stable, showing very little fluctuation in sensitivity and gradation due to changes in the temperature at the time of exposure. As Sample No.17, obtained by adding an organic compound (Exemplified Compound No.SB-5) once chemical sensitization was completed, shows large fluctuations in both sensitivity and gradation due to changes in the temperature at the time of exposure. From this it is understood that the effect of this invention cannot be obtained in the case where the organic compound is not present during the chemical sensitization. EXAMPLE-3 Samples were prepared as in Example-2 except that the chemically-unripened emulsion that was used in Example-2 was divided into seven parts and to these parts were added separately organic compounds, Exemplified Compounds SA-7, SB-1, SC-30, SC-39 and SD-5, and the following Comparative Compound* prior to the chemical sensitization of each part of the emulsion, and then the respective parts of the emulsion were chemically sensitized by the gold/sulfur sensitization, spectrally sensitized by using a red-sensitizing dye (C-6), and to them was added the hereinafter described CC-1 as a cyan coupler. The results obtained by evaluating these samples are given in the following Table-6. Sample No. Red-sensitive EM No. Temperature at the time of exposure ▵ Sensitivity (30°C -20°C) 10°C 20°C 30°C Sensitivity Gradation Sensitivity Gradation Sensitivity Gradation 27 (Com.) EMR-1 100 4.02 120 4.25 145 4.31 45 28 (Inv.) EMR-2 98 3.99 104 4.06 112 4.10 14 29 ( '' ) EMR-3 165 4.13 168 4.18 172 4.22 7 30 ( '' ) EMR-4 161 4.10 169 4.15 171 4.19 10 31 ( '' ) EMR-5 95 3.95 100 4.03 109 4.10 14 32 ( '' ) EMR-6 168 4.07 170 4.09 189 4.15 11 33 (Com.) EMR-7 81 3.88 102 4.19 130 4.25 49 From these results it is understood that where the organic compounds used in this invention which have Ksp values within the Ksp value range of this invention are used, the silver halide light-sensitive photographic material is hardly affected in the sensitivity as well as in the gradation by changes in the temperature at the time of exposure, and the effect of the organic compounds used in this invention are excellent as compared to the comparative compound having a Ksp value which is outside the Ksp range of this invention. EXAMPLE-4 Samples Nos. 34 and 35 were prepared in combination with those silver halide emulsions that were used in Examples-1, -2 and -3 and in accordance with the construction given in Table-7 and Table-8. Sample Blue-sensitive emulsion Green-sensitive emulsion Red-sensitive emulsion 34 (Comparative) EMB-10 EMG-1 EMR-1 35 (Invention) EMB-12 EMG-9 EMR-3 These samples were examined as in Examples-1, -2 and -3. The results are given in Table-9. Sample Layer Temperature at the time of exposure 10°C 20°C 30°C Sensitivity Gradation Sensitivity Gradation Sensitivity Gradation 34 (Com.) Blue-sensitive layer 100 2.93 142 3.11 167 3.30 Green-sensitive layer 100 3.50 130 3.69 149 3.78 Red-sensitive layer 100 4.01 119 4.12 138 4.29 35 (Inv.) Blue-sensitive layer 151 3.01 159 3.08 163 3.12 Green-sensitive layer 142 3.52 145 3.55 150 3.58 Red-sensitive layer 175 3.95 178 4.01 184 4.07 As is apparent from Table-9, the effect of this invention was confirmed even in the multilayered samples; that is, the sample of the construction of this invention is highly sensitive, sensitivity is hardly affected by changes in the temperature at the time of exposure and also it shows remarkably reduced imbalance in the sensitivity between blue-, green- and red-sensitive layers as compared to the comparative sample.

Claims: A silver halide light-sensitive photographic material comprising a support and, provided thereon, a silver halide emulsion layer, wherein said silver halide emulsion layer contains silver chloro-halide grains containing not less than 90 mole % of silver chloride and having been chemically sensitized in the presence of a labile sulfur compound and a gold compound, and an organic compound represented by the formula [S]; wherein Q is a group of atoms necessary to complete a 5-membered or 6-membered heterocyclic ring or a benzene ring-condensed 5-membered or 6-membered heterocyclic ring, and M is a hydrogen atom or a cation, wherein said organic compound has a solubility product (Ksp) with respect to silver ions of not more than 1 x 10 -11.0 , characterised in that said organic compound has been added to said silver halide emulsion layer after the formation of said silver halide grains and before the completion of the chemical sensitization thereof. A silver halide light-sensitive photographic material according to claim 1, wherein said silver halide is silver chlorobromide, silver iodochloride, silver chloroiodobromide or silver chloride. The silver halide light-sensitive photographic material according to claim 2, wherein said silver halide is silver chlorobromide or silver chloride. A silver halide light-sensitive photographic material according to any one of claims 1 to 3, wherein Q completes an imidazole ring, a tetrazole ring, a thiazole ring, an oxazole ring, a selenazole ring, a benzimidazole ring, a naphthoimidazole ring, a benzothiazole ring, a naphthothiazole ring, a benzoselenazole ring, a naphthoselenazole ring, a benzoxazole ring or a naphthoxazole ring, each said ring being optionally substituted; and M is a hydrogen atom or an alkali metal ion. A silver halide light-sensitive photographic material according to any one of claims 1 to 4, wherein said compound has been added during the period from immediately after the formation of the silver halide grains up to soon after the commencement of chemical sensitization. A silver halide light-sensitive photographic material according to any one of claims 1 to 5 wherein said gold compound is present in an amount from 5 X 10⁻⁷ to 5 x 10⁻³ mole per mole of silver halide. A silver halide light-sensitive photographic material according to any one of claims 1 to 6, wherein said labile sulfur compound is present in an amount from 1 x 10⁻⁷ mole to 1 x 10⁻¹ mole per mole of silver halide. A process for preparing a silver halide light-sensitive photographic material which comprises preparing a silver halide emulsion by forming silver halide grains containing not less than 90 mole % of silver chloride therein and subjecting said grains to chemical sensitization in the presence of a labile sulfur compound and a gold compound, and an organic compound represented by the formula [S]; wherein Q is a group of atoms necessary to complete a 5-membered or 6-membered heterocyclic ring or a benzene ring-condensed 5-membered or 6-membered heterocyclic ring, and M is a hydrogen atom or a cation, wherein said organic compound has a solubility product (Ksp) with respect to silver ions of not more than 1 x 10 -11.0 , characterised in that said organic compound is added to said emulsion after the formation of said silver halide grains and before the completion of the chemical sensitization.

Inventors: OHBAYASHI, KEIJI, OKUMURA, MITSUHIOR, TANAKA, SHIGEO
Applicants: KONICA CORPORATION
Application year: 1987
Main classification: G03C1
IPC codes: G03C1