JP3026133B2 - Silver halide photographic material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic light-sensitive material having a silver halide light-sensitive layer on a support, and more particularly to a silver halide photographic light-sensitive material capable of obtaining high contrast.

[0002]

2. Description of the Related Art A photoengraving process includes a process of converting a continuous tone original into a halftone image. In this process, a technique based on infectious development has been used as a photographic technique capable of reproducing an image having a super-high contrast.

A lithographic silver halide photographic light-sensitive material used for infectious development has, for example, an average particle diameter of 0.2 μm, a narrow particle distribution, uniform particle shape, and a high silver chloride content (at least 50 mol. % Or more) silver chlorobromide emulsion.
By processing this lithographic silver halide photographic material with an alkaline hydroquinone developer having a low sulfite ion concentration, an image with high contrast, high sharpness and high resolution can be obtained.

However, since these squirrel-type developers are susceptible to air oxidation, they have extremely poor preservative properties.
Even during continuous use, it is difficult to keep development quality constant.

There is known a method for obtaining a high-contrast image quickly without using the lithographic developer. For example, as disclosed in U.S. Pat.No. 2,419,975, JP-A-51-16623 and JP-A-51-20921, and JP-A-56-106244, a hydrazine derivative is contained in a silver halide photosensitive material. is there.

According to these methods, the sulfite ion concentration in the developing solution can be kept high, and the processing can be performed with the preservation enhanced.

However, in these methods, the hydrazine derivative is required to have a pH of 11 or more in order to sufficiently exhibit high contrast.
It had to be processed with a developer having a pH. pH11
A developer having the above-mentioned high pH is more stable than a squirrel-type developer in which the developing agent is easily oxidized when exposed to air. However, due to oxidation of the developing agent, a super-high contrast image is often not obtained.

In order to make up for this disadvantage, JP-A-63-29751 and EP-A-333,435 and EP-A-345,025 disclose a silver halide photographic light-sensitive material containing a high contrast agent which makes high contrast even in a developer having a relatively low pH. Is disclosed.

However, when a silver halide photographic light-sensitive material containing such a high contrast agent is processed with a developer having a pH of less than 11, the high contrast is insufficient and satisfactory halftone dot performance cannot be obtained. It is the current situation.

On the other hand, European Patent Nos. 364,166 and JP-A Nos. 62-222241, 60-140340, 62-250439, 62-222
280733 and the like describe a nucleation accelerator for accelerating the contrast enhancement, and by adding these compounds to the emulsion layer, the dot performance is improved, but the It has been found that a pin-shaped fog, a so-called black pin, is generated, which deteriorates the quality of a halftone dot image.

Therefore, there is a demand for a light-sensitive material using an effective high contrast agent and a nucleation accelerator which has solved the above problems.

[0012]

SUMMARY OF THE INVENTION An object of the present invention is to adjust the pH to 11
An object of the present invention is to provide a silver halide photographic light-sensitive material which has high photographic characteristics even when processed with a developing solution of less than 1, and has good halftone performance by suppressing fog generated in a halftone image.

[0013]

The above object of the present invention has been attained by a silver halide photographic material having the following constitution.

That is, a silver halide photographic light-sensitive material containing a hydrazine compound in at least one of the photographic constituent layers, characterized in that it contains at least one compound represented by the following general formula [I]. The above object has been achieved by the photosensitive material.

[0015]

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In the formula, Ar represents an arylene group, and R ₁ and R ₂ each represent a hydrogen atom or a substitutable group. However, at least one of R _{1 and} R ₂ is at least 3
Represents a group containing two repeating alkyleneoxy units.

Next, the compound of the general formula [I] of the present invention will be described in detail.

In the general formula [I], the arylene group for Ar is a phenylene group, a benzene ring and a cycloalkenyl ring (eg, cyclopentene, cyclohexene, cycloheptene, etc.), an aromatic ring (eg, benzene, naphthalene, etc.) or a heterocyclic ring (eg, Pyrrole, thiophene,
And furan, imidazole, thiazole, oxazole, pyrazole, pyridine, pyrazine, pyrimidine, etc.) and a divalent group formed by removing two hydrogen atoms bonded to a carbon atom of a condensed ring.

Ar is most preferably a phenylene group.

The above Ar may be further substituted with a suitable substituent. Examples of the suitable substituent include an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an amino group, an acylamino group, and a carbamoyl group. Group, sulfonamide group, sulfamoyl group, ureido group, alkoxy group, aryloxy group, heterocyclic oxy group, hydroxyl group, urethane group, alkylthio group, arylthio group, sulfonyl group, sulfinyl group, sulfinyl group, halogen atom,
Examples include a cyano group, a sulfo group, a carboxyl group, an acyloxy group, an acyl group, an alkyloxycarbonyl group, an aryloxycarbonyl group, a nitro group, a thioacyl group, a thioacylamino group, a thioureido group, and a hydrazinocarbonylamino group.

In the general formula [I], R ₁ represents a hydrogen atom or a substitutable group, and examples of the substitutable group include an aliphatic group (preferably a linear, branched or cyclic C 1-20 carbon atom). Alkyl group, alkenyl group having 2 to 20 carbon atoms, alkynyl group, etc.), aromatic group (eg, phenyl group), heterocyclic group (eg, imidazolyl, triazolyl, tetrazolyl, pyrrolidinyl, piperidinyl, pyridyl, etc.), alkoxy group (preferably Is an alkyl moiety having 1 to 20 carbon atoms such as alkoxy), an aryloxy group (such as phenoxy), an acylamino group (preferably having 1 to 30 carbon atoms), and a sulfonamide group (preferably having 1 to 30 carbon atoms) ), Ureido group (preferably having 1 to 30 carbon atoms),
A thioureido group (preferably having 1 to 30 carbon atoms) and a hydrazinocarbonylamino group (preferably having 1 to 30 carbon atoms)
), An amino group (preferably unsubstituted amino, having 1 to 30 carbon atoms or dialkylamino, alkylideneamino, etc.), an acyloxy group (preferably having 1 to 30 carbon atoms), an alkylthio group (preferably an alkyl moiety) And alkylthio having 1 to 20 carbon atoms, etc.). However,
When R ₁ contains a repeating alkyleneoxy unit, the preferred upper limit of the number of carbon atoms of the above-exemplified group is not limited thereto.

In the general formula [I], R ₂ represents a hydrogen atom or a substitutable group. Examples of the substitutable group include an aliphatic group (preferably a straight-chain, branched or cyclic carbon atom having 1 carbon atom).
To an alkyl group having 2 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an alkynyl group, etc.), an aromatic group (eg, phenyl, naphthyl, etc.), a heterocyclic group containing at least one heteroatom selected from nitrogen, sulfur and oxygen ( For example, pyrrolyl, thienyl, furyl, imidazolyl, pyrazolyl, thiazolyl,
5-membered ring such as oxazolyl, thiadiazolyl, oxadiazolyl, pyrrolyl, pyrrolidinyl, imidazolinyl, imidazolidinyl, pyrazolidinyl, tetrahydrofuryl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, dithiynyl, dioxinyl, piperidyl, cyperidinyl, piperidinyl, piperidinyl And the like). These groups may be further substituted with a suitable substituent (for example, the above-mentioned groups as suitable substituents for Ar), and when R ₂ is an aromatic group or a heterocyclic group, these groups may be further substituted. (For example, a cycloalkyl ring, a cycloalkenyl ring, an aromatic ring, a hetero ring, etc.) may form a condensed ring. However, when R ₂ is an aliphatic group containing a repeating alkyleneoxy unit, the preferred upper limit of the number of carbon atoms is not limited thereto.

In the general formula [I], in at least three repeating alkyleneoxy units contained in R ₁ or R ₂ , examples of the alkyleneoxy unit include ethyleneoxy, propyleneoxy, trimethyleneoxy, tetramethyleneoxy and the like. And ethyleneoxy, propyleneoxy and trimethyleneoxy are preferred, and ethyleneoxy and propyleneoxy are most preferred.

The number of repeating alkyleneoxy units is not particularly limited as long as it is 3 or more, but those having 3 to 100 repeating numbers are practically preferable.

The above-mentioned repeating alkyleneoxy unit is not only composed of a single alkyleneoxy unit (for example, only ethyleneoxy, only propyleneoxy, etc.),
It may be three or more repetitions by a complex alkyleneoxy unit (for example, a complex of ethyleneoxy and propyleneoxy).

Particularly preferred among the compounds represented by the general formula [I] of the present invention are those in which R ₁ is a group containing at least three repeating alkyleneoxy units.

In this case, more preferable R _{2 includes} a hydrogen atom, an aliphatic group and an aromatic group.

Next, specific examples of the compound represented by the general formula [I] of the present invention are shown below, but the present invention is not limited thereto.

[0029]

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[0030]

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[0031]

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[0032]

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[0033]

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Next, a method for synthesizing the compound represented by the general formula [I] of the present invention will be described.

For example, the exemplified compounds I-2 and I-3 can be synthesized according to the following synthesis method.

[0036]

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The content of the compound represented by the general formula [I] of the present invention is from 5 × 10 ^{-7 to} 5 × 10 ⁷ per mol of silver halide.
^-1 mol, particularly 5 × 10 ^{−6 to} 5 × 10 ^−2.
It is preferred to be in the molar range.

In the present invention, when the compound represented by the general formula [I] is contained in a photographic material, it is contained in a silver halide emulsion layer or a hydrophilic colloid layer adjacent to the silver halide emulsion layer.

Here, the compound of the formula [I] may be contained in the same layer as the hydrazine compound or in a different layer.

The hydrazine compound used in the present invention is preferably a compound represented by the following general formula [III].

[0041]

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In the formula, A represents an aliphatic group, an aromatic group or a heterocyclic group, and B represents an acyl group, an alkyl or arylsulfonyl group, an alkyl or arylsulfinyl group, a carbamoyl group, an alkoxy or aryloxycarbonyl group, a sulfamoyl group. A group, a sulfinamoyl group, an alkoxysulfonyl group, a thioacyl group, a thiocarbamoyl group, an oxalyl group, or a heterocyclic group,
₁ and A ₂ both represent a hydrogen atom, or one represents a hydrogen atom and the other represents an acyl group, a sulfonyl group, or an oxalyl group.

However, B, A ₂ and the nitrogen atom to which they are bonded are a hydrazone partial structure.

[0044]

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May be formed.

The general formula [III] will be described in detail below.

The aliphatic group represented by A preferably has 1 to 30 carbon atoms, and particularly is a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms. Examples include a methyl group, an ethyl group, a t-butyl group, an octyl group, a cyclohexyl group, a benzyl group, and the like. These are further suitable substituents (for example, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, A sulfoxy group, a sulfonamide group, an acylamino group, a ureido group, etc.).

The aromatic group represented by A in the general formula [III] is preferably a monocyclic or condensed-ring aryl group, such as a benzene ring or a naphthalene ring.

The heterocyclic group represented by A in formula [III] is preferably a monocyclic or condensed heterocyclic ring containing at least one heteroatom selected from nitrogen, sulfur and oxygen. Examples include an imidazole ring, tetrahydrofuran ring, morpholine ring, pyridine ring, pyrimidine ring, quinoline ring, thiazole ring, benzothiazole ring, thiophene ring, and furan ring.

Particularly preferred as A are an aryl group and a heterocyclic group.

The aryl group and heterocyclic group of A may have a substituent. Representative substituents include an alkyl group (preferably having 1 to 20 carbon atoms), an aralkyl group (preferably a monocyclic or condensed ring having 1 to 3 carbon atoms in the alkyl moiety), and an alkoxy group (preferably An alkyl moiety having 1 to 20 carbon atoms, a substituted amino group (preferably an amino group substituted with an alkyl group or an alkylidene group having 1 to 20 carbon atoms), an acylamino group (preferably having 1 to 40 carbon atoms) ), A sulfonamide group (preferably having 1 to 40 carbon atoms), a ureido group (preferably having 1 to 40 carbon atoms)
), A hydrazinocarbonylamino group (preferably having 1 to 40 carbon atoms), a hydroxyl group, a phosphoamide group (preferably having 1 to 40 carbon atoms) and the like.

B is specifically an acyl group (for example, formyl, acetyl, propionyl, trifluoroacetyl,
Methoxyacetyl, phenoxyacetyl, methylthioacetyl, chloroacetyl, benzoyl, 2-hydroxymethylbenzoyl, 4-chlorobenzoyl, etc., alkylsulfonyl group (eg, methanesulfonyl, 2-chloroethanesulfonyl, etc.), arylsulfonyl group (eg, benzenesulfonyl, etc.) ), An arylsulfinyl group (eg, methanesulfinyl), an arylsulfinyl group (eg, benzenesulfinyl), a carbamoyl group (eg, methylcarbamoyl, phenylcarbamoyl, etc.), an alkoxycarbonyl group (eg, methoxycarbonyl, methoxyethoxycarbonyl, etc.), aryloxy A carbonyl group (eg, phenoxycarbonyl), a sulfamoyl group (eg, dimethylsulfamoyl), a sulfinamoyl group (eg, methylsulfo) Finamoyl), an alkoxysulfonyl group (eg, methoxysulfonyl), a thioacyl group (eg, methylthiocarbonyl), a thiocarbamoyl group (eg, methylthiocarbamoyl), an oxalyl group (described later with respect to the general formula [II]), or a heterocyclic group ( For example, a pyridine ring or a pyridinium ring).

B in the general formula [III] represents A ₂ and the nitrogen atom to which they are bonded.

[0054]

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May be formed.

R ₉ represents an alkyl group, an aryl group or a heterocyclic group, and R ₁₀ represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group.

As B, an acyl group or an oxalyl group is particularly preferred.

A ₁ and A ₂ are both hydrogen atoms, or one is a hydrogen atom and the other is an acyl group (acetyl, trifluoroacetyl, benzoyl, etc.), a sulfonyl group (methanesulfonyl, toluenesulfonyl, etc.), or an oxalyl group ( Ethoxalyl).

Particularly preferred among the hydrazine compounds used in the present invention are compounds represented by the following general formula [II].

[0060]

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[0061] In the formula, R ₄ represents an aryl group or a heterocyclic group, R ₅ is

[0062]

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Represents the following.

R ₆ and R ₇ each represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a heterocyclic group, an amino group, a hydroxyl group, an alkoxy group, an alkenyloxy group, an alkynyloxy group, an aryloxy group, Or a heterocyclic oxy group, R ₈ is a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group,
Or a heterocyclic group. A ₁ and A ₂ of the general formula represents an A ₁ and A ₂ respectively synonymous groups [III].

The general formula [II] will be described in more detail.

The aryl group represented by R ₄ is preferably a single ring or a condensed ring, such as a benzene ring or a naphthalene ring.

The heterocyclic group represented by R ₄ is preferably a monocyclic or condensed 5- or 6-membered unsaturated heterocyclic ring containing at least one heteroatom selected from nitrogen, sulfur and oxygen. Ring, quinoline ring, pyrimidine ring, thiophene ring, furan ring, thiazole ring or benzothiazole ring.

R ₄ is preferably an aryl group, most preferably a benzene ring.

[0069] A ₁ and A _2, A ₁ and A in the formula [III]
Represents a group having the same meaning as _2, and most preferably both are hydrogen atoms.

R ₅ is

[0071]

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Wherein R ₆ and R ₇ are each a hydrogen atom, an alkyl group (methyl, ethyl, benzyl, etc.),
Alkenyl group (allyl, butenyl, etc.), alkynyl group (propargyl, butynyl, etc.), aryl group (phenyl, naphthyl, etc.), heterocyclic group (2,2,6,6-tetramethylpiperidinyl, N-benzylpiperidyl Nyl, quinuclidinyl, N, N'-diethylpyrazolidinyl, N-benzylpyrrolidinyl, pyridyl, etc.), amino group (amino, methylamino, dimethylamino, dibenzylamino, etc.), hydroxyl group, alkoxy group (methoxy , Ethoxy, etc.), an alkenyloxy group (such as allyloxy), an alkynyloxy group (such as propargyloxy), an aryloxy group (such as phenoxy), or a heterocyclic oxy group (such as pyridyloxy), wherein R ₆ and R ₇ represent nitrogen. A ring (piperidine, morpholine, etc.) may be formed together with the atom. R ₈ represents a hydrogen atom, an alkyl group (eg, methyl, ethyl, methoxyethyl, hydroxyethyl), an alkenyl group (eg, allyl, butenyl), an alkynyl group (eg, propargyl, butynyl), an aryl group (eg, phenyl, naphthyl), and a heterocyclic ring. Group (2,2,
6,6-tetramethylpiperidinyl, N-methylpiperidinyl, pyridyl, etc.).

Specific examples of the compound represented by the general formula [III] are shown below. However, the present invention is not limited to these.

[0074]

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[0075]

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[0076]

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[0077]

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[0078]

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[0079]

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[0080]

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The method for synthesizing the compound represented by the general formula [III] used in the present invention is described in JP-A Nos. 62-180361 and 62-1782.
No. 46, No. 63-234245, No. 63-234246, No. 64-90439,
JP-A-2-37, JP-A-2-841, JP-A-2-947, JP-A-2-120736,
2-230233, 3-125134, U.S. Patent 4,686,167,
4,988,604 and 4,994,365, European Patent 253,66
Nos. 5, 333,435 and the like can be referred to.

The content of the compound represented by the general formula [III] of the present invention is from 5 × 10 ^{−7 to} 5 × per mol of silver halide.
It is preferably 10 ^-1 mol, particularly 5 × 10 ^{-6 to} 5 × 10
It is preferred to be in the range of ^-2 mol.

In the present invention, when the compound represented by the general formula [III] is contained in a photographic light-sensitive material, it is contained in a silver halide emulsion layer or a hydrophilic colloid layer adjacent to the silver halide emulsion layer.

The silver halide photographic material of the present invention has at least one silver halide emulsion layer. That is, at least one silver halide emulsion layer may be provided on one side of the support, or at least one silver halide emulsion layer may be provided on both sides of the support. The silver halide emulsion can be coated directly on the support or can be coated via another layer such as a hydrophilic colloid layer containing no silver halide emulsion. A hydrophilic colloid layer as a protective layer may be provided on the emulsion layer. Further, the silver halide emulsion layers may be separately applied to silver halide emulsion layers having different sensitivities, for example, high sensitivity and low sensitivity. In this case, an intermediate layer may be provided between the silver halide emulsion layers. That is, an intermediate layer made of a hydrophilic colloid may be provided as necessary. or,
A non-photosensitive hydrophilic colloid layer such as an intermediate layer, a protective layer, an antihalation layer, and a backing layer may be provided between the silver halide emulsion layer and the protective layer.

Next, the silver halide used in the silver halide photographic light-sensitive material of the present invention will be described. The silver halide is silver iodobromide or silver iodobromide containing 4 mol% or less, preferably 3 mol% or less of silver iodide. The average diameter of the silver halide grains is preferably in the range of 0.05 to 0.5 μm, and particularly preferably 0.10 to 0.
40 μm is preferred.

The particle size distribution of the silver halide grains used in the present invention is arbitrary, but the value of the monodispersity defined below is 1 to 20.
%, More preferably 5% to 15%.

Here, the monodispersity is a value (%) obtained by multiplying a value (coefficient of variation) obtained by dividing the standard deviation of the particle diameter by the average particle diameter by 100.
Is defined as For convenience, the grain size of silver halide grains is represented by a ridge length in the case of cubic grains, and other grains (octahedron, tetradecahedron, etc.) are calculated by the square root of the projected area.

In the practice of the present invention, for example, silver halide grains having a multilayer structure of at least two layers can be used, for example, silver iodobromide in the core and silver halide in the shell. Consisting of silver iodobromide grains, which is silver bromide. At this time, iodine can be contained in any layer within 5 mol%.

The silver halide grains used in the silver halide emulsion of the present invention may be formed by cadmium salt, zinc salt, lead salt, thallium salt, iridium salt (including complex salt) during the step of forming and / or growing the grains. ), A rhodium salt (including a complex salt) and an iron salt (including a complex salt) using at least one selected from the group consisting of a metal ion and a metal ion. Further, by placing the particles in an appropriate reducing atmosphere, a reduction sensitizing nucleus can be provided inside the grains and / or on the surface of the grains.

Further, the silver halide can be sensitized by various chemical sensitizers. As the sensitizer, for example, active gelatin, sulfur sensitizer (sodium thiosulfate, allylthiocarbamide, thiourea, allylisothiacinate, etc.), selenium sensitizer (N, N-dimethylselenourea, selenourea, etc.) ), Reduction sensitizers (triethylenetetramine, stannous chloride, etc.), potassium chloroaulite, potassium aurithiocyanate, potassium chloroaurate, 2-
Various noble metal sensitizers represented by aurosulfobenzothiazole methyl chloride, ammonium chloroparadate, potassium chloroplatinate, sodium chloroparadite and the like can be used alone or in combination of two or more. When a gold sensitizer is used, rhodamonmon can be used as an auxiliary agent.

The silver halide grains used in the present invention can be preferably applied to grains having higher surface sensitivity than internal sensitivity, that is, silver halide grains giving a so-called negative image. Performance can be enhanced.

The silver halide emulsion used in the present invention includes mercaptos (1-phenyl-5-mercaptotetrazole, 2-mercaptobenzthiazole) and benzotriazoles (5-bromobenzotriazole-5-methylbenzotriazole). ), Benzimidazoles (6-nitrobenzimidazole), etc., can be used to stabilize or suppress fog.

The photosensitive silver halide emulsion layer or an adjacent layer may be provided with a Research Disclosure for the purpose of increasing sensitivity, increasing contrast, or accelerating development.
ure) No. 17463, paragraphs (B) to (D) can be added.

It is preferable to add a compound represented by the following general formula [P].

[0095] Formula (P) _{R 11 -0- (CH 2 CH 2} O) nH [wherein R ₁₁ represents an aromatic ring having a hydrogen atom or unsubstituted or substituted groups,, n until 10-200 Represents an integer. ]
Specific examples of the compound represented by the general formula [P] include Japanese Patent Application No. Hei.
P-1 to P-17 described on pages 94 to 96 of 2-160939. Of these, those having a molecular weight of 1500 or more are preferred,
It is not limited to these.

These compounds are commercially available and can be easily obtained. These compounds are preferably added in an amount of 0.01 to 4.0 mol per mol of silver halide,
2-2 mol is more preferred. Further, two or more compounds having different values of n may be included.

A sensitizing dye, a plasticizer, an antistatic agent, a surfactant, a hardener, and the like can be added to the silver halide emulsion used in the present invention.

When the compounds of the general formulas [I] and [III] according to the present invention are added to a hydrophilic colloid layer, gelatin is preferred as a binder for the hydrophilic colloid layer.
Hydrophilic colloids other than gelatin can also be used.
These hydrophilic binders are applied on both sides of the support, respectively.
It is preferable to apply the coating at g / m ² or less.

Examples of the support that can be used in the practice of the present invention include baryta paper, polyethylene-coated paper, polypropylene synthetic paper, glass plate, cellulose acetate, cellulose nitrate, and polyester films such as polyethylene terephthalate. These supports are appropriately selected depending on the purpose of use of the silver halide photographic light-sensitive material.

For the development processing of the silver halide photographic material of the present invention, for example, the following developing agents are used.

Representative HO- (CH ＝ CH) n-OH type developing agents include hydroquinone, and catechol and pyrogallol.

As the HO- (CH ＝ CH) n-NH ₂ type developer, ortho- and para-aminophenols or aminopyrazolones are typical, and N-methyl-p-aminophenol, N-β -Hydroxyethyl-p-aminophenol, p-hydroxyphenylaminoacetic acid, 2-aminonaphthol and the like.

As the heterocyclic developer, 1-phenyl-3
-Pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, 1-phenyl-4-methyl-4-hydroxymethyl
Examples thereof include 3-pyrazolidones such as -3-pyrazolidone.

In addition, TH. James The Theory of the Photographic Process 4th Edition (The T
heory of the Photographic Process, Fourth Edition)
Pages 291-334 and Journal of the American
Chemical Society (Journal of the American Chem)
ical society), vol. 73, p. 3,100 (1951) can be effectively used in the present invention. These developers may be used alone or in combination of two or more, but it is preferable to use two or more in combination.

The effect of the present invention is not impaired by using a preservative, for example, a sulfite such as sodium sulfite or potassium sulfite as a preservative in a developer used for developing the light-sensitive material of the present invention. Further, hydroxylamine and hydrazide compounds may be used as preservatives. In addition, it can have a pH adjustment and buffer function with caustic alkali, alkali carbonate, amine or the like as used in general black and white developers.

The developer used in the present invention is characterized in that a developer having a pH of less than 11 can be used. In the developing solution, an inorganic development inhibitor such as promcali, an organic development inhibitor such as 5-methylbenzotriazole, 5-methylbenzimidazole, 5-nitroindazole, adenine, guanine, 1-phenyl-5-mercaptotetrazole, ethylenediamine Metal ion scavengers such as acetic acid, methanol, ethanol,
Development accelerators such as benzyl alcohol and polyalkylene oxide, sodium alkylaryl sulfonates, surfactants such as natural saponins, saccharides or alkyl esters of the above compounds, hardening agents such as glutaraldehyde, formalin, glyoxal, sodium sulfate It is optional to add an ionic strength regulator or the like.

In the developer used in the present invention, alkanolamines such as diethanolamine and triethanolamine, diethylene glycol,
A glycol such as triethylene glycol or an alkylamino alcohol such as diethylamino-1,2-propanediol or butylaminopropanol may be contained.

[0108]

EXAMPLES Specific examples of the present invention will be described below, but the embodiments of the present invention are not limited to these examples.

Example 1 (Preparation of silver halide emulsion A) A silver iodobromide emulsion (2 mol% of silver iodide per mol of silver) was prepared by a double jet method. During this mixing, 8 × 10 ^-7 mol of K ₂ IrCl ₆ was added per mol of silver. The resulting emulsion was an emulsion composed of cubic monodisperse particles (average coefficient of variation: 9.5%) having an average particle size of 0.20 μm.
After adding 6.5 ml of a 1% aqueous solution of potassium iodide per mol of silver to this emulsion, modified gelatin (exemplified compound G-8 of Japanese Patent Application No. 1-180787) was added. Water washing and desalting were performed in the same manner as in Example 1. PA at 40 ° C after desalting
g was 8.0. Further, at the time of redispersion, a mixture of the following compounds [A], [B] and [C] was added as an antibacterial agent.

[0110]

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(Preparation of silver halide photographic light-sensitive material) One of a 100 μm-thick polyethylene terephthalate film having a 0.1 μm-thick undercoat layer on both sides (see Example 1 of JP-A-59-19941) A silver halide emulsion layer of the following formula (1) was coated on the undercoat layer so that the amount of gelatin was 2.0 g / m ² and the amount of silver was 3.2 g / m ^2. (2) coating the emulsion protective layer so that the amount of gelatin is 1.0 g / m ² ;
On the other undercoat layer on the opposite side, a backing layer of the following formula (3) was applied so that the amount of gelatin was 2.4 g / m ² ,
Further, a backing protective layer of the following formula (4) was further applied thereon so that the amount of gelatin became 1.0 g / m ² , thereby obtaining Samples 1 to 24.

Formulation (1) (Silver halide emulsion layer composition) Gelatin 2.0 g / m ² silver halide emulsion A (silver content) 3.2 g / m ² sensitizing dye: SD-1 8.0 mg / m ² sensitizing dye : SD-2 0.2 mg / m ² Stabilizer: 4-methyl-6-hydroxy-1,3,3a, 7-tetrazaindene 30 mg / m ² Antifoggant: Adenine 10 mg / m ² Surfactant: Saponin 0.1 g / m ² surfactant: S-1 8.0 mg / m ² hydrazine derivative according to the present invention [III] 30 mg / m ² nucleation promoting compound [I] according to the present invention 100 mg / m ² latex polymer: LX 1.0 g / m ² polyethylene glycol (molecular weight 4000) 0.1 g / m ² Hardener: H-1 60 mg / m ² formulation (2) (Emulsion protective layer composition) Gelatin 1.0 g / m ² Surfactant: S-2 10 mg / m ² matting agent: silica having an average particle size of 3.5 μm 3 mg / m ² hardening agent: formalin 30 mg / m ² surfactant: S-3 10 mg / m ² formulation (3) (backing layer composition) D-1 30 mg / m ² D-2 75 mg / m ² D-3 30 mg / m ² Gelatin 2.4 g / m ² Surfactant: S-1 6.0mg / m ² Surfactant: Saponin 0.1 g / m ² Formulation (4) (Backing protective layer composition) Gelatin 1 g / m ² Matting agent: polymethyl an average particle size of 3.0~5.0μm methacrylate 15 mg / m ² surfactant: S-2 10 mg / m ² hardener: glyoxal 25 mg / m ² hardener: H-1 35 mg / m ² formulation (1), use the (2) and (3) The compounds used are shown below.

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The obtained samples were subjected to a dot quality test by the following method.

(Dot Quality Test Method) A halftone screen (150 lines / inch) having a halftone area of 50% was partially attached to the step wedge, and the sample was brought into close contact with the screen and exposed for 5 seconds with a xenon light source. This sample was subjected to development processing under the following conditions in a rapid processing automatic developing machine into which the following developing solution and the following fixing solution were charged, and the dot quality of the sample was observed with a loupe of 100 times, and the dot quality was high. The items are given a "5" rank, and the following "4",
"3", "2", "1", the rank is sequentially lowered to 5
It was rated on a scale. Note that the ranks “1” and “2” are levels that are not preferable for practical use.

The fog in the halftone dot was also evaluated in the same manner, and those having no black pin in the halftone dot were assigned the highest rank "5". The ranks "4", "3", "2", and "1" were sequentially reduced and evaluated.

In the ranks "1" and "2", black pins are large and are not at a practically preferable level.

Developer Formulation Developer 1 Developer 2 Sodium ethylenediaminetetraacetate 1 g 1 g Sodium sulfite 60 g 60 g Trisodium phosphate (decahydrate) 75 g 75 g Hydroquinone 22.5 g 22.5 g Sodium hydroxide 8 g 8 g Sodium bromide 3 g 3 g 5 -Methylbenzotriazole 0.25g 0.25g 1-Phenyl-5-mercaptotetrazole 0.08g 0.08g Methol 0.25g 0.25g Add water 1 liter 1 liter Adjust pH with sodium hydroxide pH = 10.8 pH = 10.5 Formulation of fixer (Composition A) Ammonium thiosulfate (72.5w / v% aqueous solution) 240ml Sodium sulfite 17g Sodium acetate / trihydrate 6.5g Boric acid 6g Sodium citrate / dihydrate 2g (Composition B) Pure water (ion exchange water) 17ml Sulfuric acid ( 50 g w / w aqueous solution) 4.7 g Aluminum sulfate 26.5 g (aqueous solution having an equivalent content of 8.1 w / w% in terms of Al ₂ O ₃ ) When using a fixing solution, dissolve the above composition A and composition B in 500 ml of water in this order. Re It was used as a turtle. This fixer
The pH was adjusted to 4.8 with acetic acid.

(Processing conditions) (Process) (Temperature) (Time) Current image 40 ° C. 15 seconds Fixed 35 ° C. 15 seconds Rinse 30 ° C. 10 seconds Dry 50 ° C. 10 seconds In addition, prescription (1) The following compounds (a) and (b) were added as comparative compounds of the nucleation promoting compound of the present invention added to the silver halide emulsion layer in Example 1.

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Table 1 shows the results of the quality test.

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[Table 1]

As is clear from Table 1, the sample according to the present invention has better dot quality and black pin compared to the comparison.

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According to the present invention, a silver halide photographic light-sensitive material having high contrast, low fog and good halftone quality can be provided even when processed with a developing solution having a low pH of less than pH 11.

Claims (1)

(57) [Claims] 1. A silver halide photographic light-sensitive material containing a hydrazine compound in at least one layer of a photographic constituent layer, characterized by containing at least one compound represented by the following general formula [I]. Photosensitive material. Embedded image [In the formula, Ar represents an arylene group, and R ₁ and R ₂ each represent a hydrogen atom or a substitutable group. However, at least one of R _{1 and} R ₂ represents a group containing at least three repeating alkyleneoxy units. ]