JPS62180361A - Image forming method - Google Patents

Abstract

PURPOSE:To obtain a photographic characteristic of extremely high-contrast negative gradation in which gamma exceeds 10 when a stable developing soln. is used by developing silver halide photographic sensitive material in the presence of a specific compd. CONSTITUTION:The silver halide photographic sensitive material is developed in the presence of the compd. expressed by the formula I. The compd. expressed by the formula I is easily obtd. by bringing, for example, a corresponding hydrazine compd. and such a compd. as expressed by the formula II into reaction with each other or simply heating the same in the presence of a basic catalyst in a suitable solvent such as dioxane, benzene or DMF. The compd. expressed by the formula I is preferably incorporated into a surface latent image type silver halide emulsion layer and may be incorporated into a hydrophilic colloidal layer adjacent to the surafce latent image type silver halide emulsion layer. The content of the hydrazine compd. expressed by the formula I is adequately in a 10<-4>-10<-1>mol/l and more particularly preferably 5X10<-4>-5X10<-2>/l range in the case of incorporating the same into the developing soln. In the formula III, R3, R4 are defined in the formula I and X denotes a halogen atom, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (A>Industrial Field of Application) The present invention relates to a method for developing silver halide photographic materials, and in particular to methods for developing extremely high-contrast negative images, high-sensitivity negative images, and good halftone dots. It relates to photographic materials that provide image quality.

(B) Prior Art The addition of hydrazine compounds to silver halide photographic emulsions and developing solutions is described in US Pat. No. 3,730,727 (developing solution combining ascorbic acid and hydrazine);
No. 3,227,552 (using hydrazine as an auxiliary developer to obtain a direct positive color image), No. 3
, 386,831 (containing β-monophonyl hydrazide of aliphatic carboxylic acid as a stabilizer for silver halide sensitive materials), 2.419,975 @ specification, and Hees
Author [The Theory of Photography]
ic Process J 3rd edition (1966) page 281.

Among these, US Pat. No. 2,419,975 in particular discloses that a high-contrast negative image can be obtained by adding a hydrazine compound.

That is, a hydrazine compound was added to a silver chlorobromide emulsion, and 12
．． It is stated that when developed with a developer having a high pH of 8, extremely high-contrast photographic characteristics with a gamma (γ) of over 10 can be obtained.

However, a strong alkaline developer having a pH close to 13 is easily oxidized in the air, is unstable, and cannot withstand long-term storage or use. The ultra-high contrast photographic characteristics with a gamma value exceeding 10 are extremely useful for photographic reproduction of continuous-tone images using dot images (dot images) useful for printing plate making, and for reproduction of line drawings, whether negative or positive images. Useful.

Conventionally, for this purpose, a silver chlorobromide emulsion with a silver chloride content exceeding 50 mol%, preferably 75 mol% has been used, and the effective yield of sulfite ions is extremely low (usually 0). A method of developing with a hydroquinone developer containing 1 mol/l or less was commonly used (lith development).

However, in this method, due to the low sulfite ion content in the developer, the developer is extremely unstable and cannot be stored for more than 3 days.

Furthermore, since all of these methods require the use of silver chlorobromide emulsions with relatively high silver chloride contents, high sensitivity cannot be obtained.

Therefore, there has been a strong desire to obtain ultra-high contrast photographic characteristics useful for reproducing halftone images and line drawings by using a highly sensitive emulsion and a stable developer.

To this end, U.S. Pat.
No. 269.929, No. 4,272,614, No. 4,
No. 323.643 and other publications disclose silver halide photographic materials that use a stable developer and provide extremely high contrast negative photographic properties, but the acylhydrazine compounds used therein have several drawbacks. It has been found that it has

That is, these hydrazines are known to generate nitrogen gas during the development process, and this gas may collect in the film to form bubbles, which may damage photographic images.

Therefore, there has been a desire for a compound which can reduce the generation of bubbles and at the same time reduce the cost of producing a sensitive material, and which can provide extremely sharp photographic characteristics even when added in a small amount. Also, if development is continued using these hydrazines, countless circular fogs (sand fogs) will appear in the unexposed areas.
pepper fog) was likely to occur, significantly impairing image quality.

In addition, conventional hydrazines are required in large amounts for sensitization and high contrast, and when particularly high sensitivity is required in terms of the performance of the photosensitive material, other sensitization techniques [e.g. chemical Increasing sensitization; increasing particle size: US Patent No. 4
However, when these sensitization techniques are used together,
Generally, sensitization and enhancement blurring may occur over time during storage.

Furthermore, when development is performed using conventional hydrazines,
So-called uneven development is likely to occur due to uneven stirring of the developer. This development unevenness is noticeable in self-developing processing, and if the development processing is strengthened to eliminate this phenomenon, the above-mentioned sand fog phenomenon occurs, which is a drawback.

Therefore, there has been a desire for a compound that does not have the problems of stability over time, uneven development, or sand fog as described above, is effective when added in a very small amount, and is easy to synthesize.

(C) Purpose of the Invention The purpose of the present invention is, firstly, to develop a gamma film using a stable developer.
It is an object of the present invention to provide a silver halide photographic light-sensitive material capable of obtaining photographic characteristics of extremely high contrast negative gradation with a value exceeding 10.

A second object of the present invention is to provide a negative-working silver halide photographic material containing hydrazines that can provide good image quality without problems with uneven development or sand fog.

A third object of the present invention is to provide a negative-working halogenated compound containing hydrazine that can provide the desired photographic characteristics of extremely high contrast negative gradation with a small amount of addition (6) without adversely affecting photographic performance. The purpose is to provide silver photosensitive material for ¥31.

The fourth purpose of the present invention is to improve processing stability (e.g. development unevenness,
To provide a method for developing a silver halide photographic sensitizer with high contrast by adding hydrazine to a developing processing solution, which can give photographic characteristics of good contrast (such as no sand fog, etc.) and rapid high contrast. It is.

(D> Structure of the Invention The object of the present invention was achieved by developing a silver halide photographic material in the presence of a compound represented by the following general formula (I).

General formula (I> [In the formula, Ar' represents an aryl group, and R1 and R2 do not represent a hydrogen atom or a group represented by the general formula [II].

R3 and R4 represent a hydrogen atom, an alkyl group, an aryl group, an unsaturated heterocyclic group or a substituted amino group.

Furthermore, R3 and R4 may be connected to each other to form a ring. ] General formula (n) ÷C-Sho-R [In the formula, Ro represents an alkyl group, an alkenyl group, an aryl group, an alkoxy group, or an aryloxy group, and n is 1
or represents an integer of 2. ] The aryl group represented by Ar in the general formula (I> may specifically have a substituent) is a diyl group or a naphthyl group, and examples of the substituent are: Alkyl group, aryl group, halogen atom, alkoxy group, aryloxy group, alkenyl group, substituted amino group, acylamino group, sulfonamide group, alkylidene amino group, thiourea group, thioamide group, heterocyclic group, or combinations thereof, etc. can be mentioned.

In the general formula (1), among the groups represented by R3 and R4,
The alkyl group is preferably an alkyl group having 30 or less carbon atoms, and has a substituent such as a halogen atom, a cyano group, a carboxy group, an alkoxy group, an aryloxy group, a sulfo group, an aryl group, or a substituted amine group. It's okay.

In the general formula (I>, among the bases represented by R3 and R4,
The aryl group is a phenyl group which may have a substituent,
Or a naphthyl group.

Examples of preferred substitutions include alkyl groups, aryl groups,
Examples include halogen atoms, alkoxy groups, aryloxy groups, alkenyl groups, substituted amino groups, acylamino groups, sulfonamide groups, alkylidene amino groups, heterocyclic groups, and combinations thereof.

Among the groups represented by R3 and R4 in the general formula (I>), an unsaturated heterocyclic group is bonded to a monocyclic or bicyclic aryl group to form a heteroaryl group.

But it's okay.

Among the groups represented by R3 and R4 in the general formula (I>, the substituted amino group refers to an amino group that is a substituent,
Examples of preferred substituents include alkyl groups, aryl groups, alkenyl groups, heterocyclic groups, and combinations thereof.

In the general formula (II>), among the groups represented by Ro, the alkyl group and alkenyl group are preferably an alkyl group and an alkenyl group having 30 or less carbon atoms, such as a halogen atom, a cyano group, an alkoxy group, and an aryl group. It may have a substituent such as an oxy group, an aryl group, or a substituted amine group.

In the general formula (n), among the groups represented by Ro, the aryl group is a phenyl group or a naphthyl group which may have a substituent, and examples of the substituent include an alkyl group,
Examples include an aryl group, a halogen atom, an alkoxy group, an aryloxy group, or a combination thereof.

In the general formula (n), among the groups represented by Ro, the alkoxy group is preferably an alkoxy group having 1 to 8 carbon atoms, and may be substituted with a halogen atom, an aryl group, or the like.

In the general formula (n), among the groups represented by Ro, the aryloxy group is preferably a monocyclic one, and a halogen atom,
It may be substituted with an alkyl group or the like.

Ar or R3 and R4 in the general formula (I) may have a ballast group commonly used in immobile photographic additives such as couplers incorporated therein.

The ballast group is a group having 8 or more carbon atoms and is relatively inert to photography, and can be selected from, for example, an alkyl group, an alkoxy group, a phenyl group, a phenoxy group, and the like.

Specific examples of the compound represented by the general formula (I>) are shown below.

However, the present invention is not limited to the following compounds.

(Margin below) CF3 CF3 18° ■ 22゜ The compounds of the present invention can be synthesized by various methods.

For example, the corresponding hydrazine compound (Ar-NH-NHz
> and a compound as shown in general formula (III) in a suitable solvent such as dioxane, benzene, DMF under a basic catalyst or simply by heating.

General formula (III) [In the formula, R3 and R4 are defined in the general formula (I>, and X represents a halogen atom, phenoxy group, succinimide group, phthalimide group, etc.) The following: The method for synthesizing the compound of the present invention will be explained by giving specific examples.

Synthesis Example 1> Synthesis of Exemplified Compound 1 5-aminobenzotriazole 13.4g, pyridine 7
．． A mixture of 9 tJ and 100 parts of dioquiline was added to 1 part of phenyl-chloroglyoxalane with stirring at room temperature.
A solution prepared by dissolving 8.5 SJ in Geokylymph 0m was added dropwise little by little.

After the dropwise addition, after stirring at room temperature for 4 hours, the precipitated product was collected by filtration, thoroughly washed with water, and then recrystallized from ethanol.
: 5-phenoxyoxaloylamino-henjitriazole is 19919.

Melting point: 300°C or higher Next, add 100 rdl of benzene and 3.09 g of triethylamine to 8.0 g of 5-phenoxyoxaloylamino-henjitriazole obtained above and 5.29 g of 4-methyl-xyphenylhydrazine hydrochloride. The mixture was heated under reflux on a water bath for 5 hours.

After the reaction, the reaction solution was layered (under reduced pressure), the residue was washed with water, and then recrystallized from methanol to obtain Exemplified Compound 1.
I got it.

Yield: 6. Melting point: 238. O~239.5°C
(Elemental analysis) 0% H% N% Theory 1st shift:
55.21 4. ．． 32 25.76 Measured value: 55.19 4.34 25.68 Synthesis Example 2> Synthesis of Exemplary Compound 6 Intermediate in Synthesis Example 1 5-phenokidiogizaroylamino-benzo 1-lyazole 8.09 and 4-(4-t
art-butylphenoxy> 8.8 g of phenylhydrazine hydrochloride, 100 d of dioxane, 1 to 3 ethylamine
．． Nine mouthfuls of 0g were placed and refluxed under pressure on a water bath for 9 hours.

After the reaction, the reaction solution was concentrated under reduced pressure, the residue was washed with water, and then recrystallized from ethanol to obtain Exemplary Compound 6.

Yield: 9.3g Melting point: 217.5-219.5℃ (
Elemental analysis) 0% H% N% theoretical value:
64.85 5.44 18.91 Measured value:
64.86 5.50 18.98 Synthesis Example 3>
Synthesis of Exemplified Compound 11 2-Chloro-5-[4-(2,4-di-tert-amylphenoxy)butyroylaminoco-aniline 31.
Dissolve 1g in dioxy 200d, triethylamine 7
．． 83 was added thereto, and phenyl-chloroglyoxalate 'I4.29 was added little by little while stirring and cooling with cold water.

After the addition was completed, the mixture was stirred at room temperature for 1 hour, the precipitated salt was filtered off, and the filtrate was concentrated under reduced pressure and used for the next reaction.

2-chloro-5-[4-(2,4-di-1er) obtained above
L-amylphenoxy)butyroylamino]-phenokylyroylaniline 11.8513 was dissolved in benzene 150m
After dissolving in water, 3.669 m of 4-me:xyphenylhydrazine hydrochloride and 2.93 m of triethylamine were added, and the mixture was heated under reflux on a water bath for 2 hours.

After the reaction, the reaction solution was concentrated under reduced pressure, the resulting residue was washed with water, and then recrystallized from a mixed solvent of ethyl acetate and cyclohexyl chloride to obtain 1q of Exemplified Compound 11.

Yield near, 79 Melting point: 135-137°C (elemental analysis) 0% H% N% theoretical value: 6
5.97 7,12 8.79 Measured value: 65
．． 98 7. '16 8.81 In the light-sensitive material of the present invention, the compound represented by the general formula (I>) is preferably contained in the surface latent image type silver halide emulsion layer. It may be contained in a hydrophilic colloid layer adjacent to the hydrophilic colloid layer.

Such layers include a subbing layer, an intermediate layer, a filter layer, a protective layer,
The layer may have any function, such as an antihalation layer, as long as it does not prevent the compound represented by the general formula (I> from diffusing into the silver halide grains).

The content d of the compound of the present invention in the layer varies depending on the characteristics of the silver halide emulsion used, the chemical structure of the compound and the development conditions, so the appropriate content can vary over a wide range, but the surface latent image A range of about 1.times.10@-6 to 1.times.10@-2 moles per mole of silver in the type silver halide emulsion is practically useful.

When the hydrazine compound represented by the general formula (I>) used in the present invention is mixed into the developer,
10-1 mol/ρ is suitable, more preferably 5x1
A range of 0'' to 5x10-2/, 1! is particularly preferred.

The silver halide used in the photosensitive silver halide emulsion layer of the present invention is not particularly limited, and silver chlorobromide, silver chloroiodobromide, silver iodobromide, silver bromide, etc. can be used. However, when silver iodobromide or silver chloroiodobromide is used, the content ω of silver iodide is preferably in the range of 5 mol % or less.

There are no particular limitations on the morphology, crystal habit, size distribution, etc. of the silver halide grains, but grain sizes of 0.7 microns or less are preferred.

Silver halide emulsions are composed of gold compounds such as chloroaurates, gold trichloride, etc., iodine compounds such as rhodium and iridium, which react with silver salts to form silver sulfide, and silver halide emulsions. Sensitivity can be increased by using reducing substances such as tin salts and amines without coarsening the particles.

Further, an iron compound such as a metal salt such as rhodium or iridium, or a blush salt may be present during physical ripening or nucleation of silver halide grains.

It is preferable to add a rhodium salt or a complex salt directly to the toner because it further enhances the effect of the present invention of achieving ultra-high contrast photographic properties in a short development time.

In the present invention, a surface latent image type silver halide emulsion refers to an emulsion comprising silver halide grains having surface sensitivity higher than internal sensitivity, and this emulsion is preferably described in US Pat. No. 4,224,
It has a difference between surface sensitivity and internal sensitivity as specified in the specification of No. 401.

It is desirable that the silver halide emulsion be monodisperse, particularly an emulsion having the monodispersity defined in the above-mentioned US Pat. No. 4,224,401.

The photographic emulsion used in the present invention may be spectrally sensitized with medium dyes or others.

The dyes used include cyanine dyes, merocyanine dyes, complex cyanine dyes, complex merocyanine dyes, holopolar cyanine dyes, hemicyanine dyes, styryl dyes,
Includes hemioxonol dyes.

Particularly useful dyes include cyanine dyes, merocyanine dyes,
and a pigment belonging to complex merocyanine pigments.

These sensitizing dyes may be used alone or in combination.

Combinations of sensitizing dyes are often used, especially for the purpose of strong sensitization.

Along with the sensitizing dye, it is a dye that itself does not have a spectral sensitizing effect or a substance that does not substantially absorb visible light,
The emulsion may contain a substance exhibiting strong sensitization.

As the binder or protective colloid that can be used in the emulsion layer or intermediate layer of the photosensitive film of the present invention, it is advantageous to use gelatin, but other hydrophilic colloids can also be used.

For example, graph 1 of seratin derivatives, gelatin and other polymers, proteins such as albumin and casein;
Cellulose derivatives such as hydroxydiylcellulose, carboxymethylerulose, and cellulose sulfate; sugar derivatives such as sodium alginate and starch derivatives; polyvinyl alcohol, partial acetal of polyvinyl alcohol, poly-N-vinylpyrrolidone, and polyacrylic acid. A wide variety of synthetic hydrophilic polymeric materials can be used, such as single or copolymers of polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, and the like.

Examples of gelatin include lime-treated pilatin, acid-treated gelatin, Bull, Soc, Sci, Phot, Jap.
Enzyme-treated piratin as described in An No. 16, P2O ('1966) may be used, and gelatin hydrolysates and enzymatically decomposed products may also be used.

The photographic emulsion used in the present invention includes photosensitive material O! Prevents fogging during 31 manufacturing processes, storage or photo processing,
Alternatively, various compounds can be included for the purpose of stabilizing photographic performance.

That is, azoles such as benzothiazolium salts, nitroimidazoles, nitrobenzimidazoles, chlorobenzimidazoles, mercaptothiazoles, mercaptobenzodeazoles, mercap1-deazoles, aminotriazoles, benzotriazoles , mercaptotetrazoles; mercaptopyrimidines, mercaptotriazines, dioketo compounds; azaindenes; and many other compounds conventionally known as antifoggants or stabilizers can be added.

Among these, particularly preferred are benzo-1 to lyazoles (eg, 5-methylbenzotriazoles) and nitroindazoles (eg, 5-11 to indazole).

These compounds may be included in the treatment liquid.

The photographic light-sensitive material of the present invention may contain an inorganic or organic hardener in the photographic emulsion layer and other hydrophilic colloid layers.

For example, chromium salts (chromium alum, etc.), aldehydes (formaldehyde, glyoxal, etc.), N-
Medirol compounds, dioxane derivatives (2,3-dihydroxydioxane, etc.), active vinyl compounds, active halogen compounds (2,4-dichloro-6-hydroxy-8-
triazine, etc.), etc. can be used alone or in combination.

The photographic emulsion layer or other hydrophilic colloid layer of the light-sensitive material prepared using the present invention may contain coating aids, antistatic properties, smoothness improvement, emulsification dispersion, adhesion prevention, and photographic property improvement (e.g.
Various surfactants may be contained for various purposes such as development acceleration, contrast enhancement, and sensitization.

For example, non-ionic materials such as zaponin (steroids), alkylene oxide derivatives (polyethylene glycol, polyethylene glycol alkyl ethers, etc.), glycidol derivatives (alkenylsuccinic acid polyglycerides, etc.), fatty acid esters of polyhydric alcohols, alkyl esters of sugars, etc. Acidic surfactants such as carboxy groups, sulfo groups, phospho groups, Nisder sulfate groups, phosphate ester groups, etc. such as alkyl carboxylates, alkyl sulfonates, alkyl sulfates, alkyl phosphates Ampholytic surfactants such as diamino acids, aminoalkyl sulfonic acids, aminoalkyl sulfates or phosphoric acid esters; heterocyclic surfactants such as aliphatic or aromatic quaternary ammonium salts, pyridinium, imidazolium, etc. Cationic surfactants such as quaternary ammonium salts can be used.

The photographic light-sensitive material used in the present invention may contain a decomposed product of a water-insoluble or water-soluble synthetic polymer in the photographic emulsion layer or other hydrophilic colloid layer for the purpose of improving dimensional stability or the like.

For example, alkyl (meth)acrylates, alkoxyalnylonyl (meth)acrylates, glycidyl (meth)acrylates, (meth)acrylamides, vinyl acetate, acrylonilyl, olefins, styrene, etc. alone or in combination. or a combination of these with acrylic acid, methacrylic acid, α, β-unsaturated dicarboxylic acid, hydroxyalkylate, sulfoalkyl (meth)acrylate, styrene sulfonic acid, etc. as a monomer component can be used.

In order to obtain ultra-high contrast photographic properties using the silver halide photosensitive material of the present invention, it is necessary to use a conventional Lith developer or US Pat.
It is not necessary to use a highly alkaline developer similar to f) H2S described in No. 19,975, and a stable developer can be used.

That is, the silver halide photographic material of the present invention contains a sufficient amount of sulfite ion as a preservative (particularly 0.15 mol/f).
1 or more) can be used, and a developer containing p
H9. By using a developing solution with a molecular weight of 5 or more, particularly 10.5 to 12.3, a sufficiently ultra-high contrast negative image can be obtained.

There is no particular restriction on the developing agent that can be used in the method of the present invention, and examples include dihydroxybenzenes, 3-pyrazolidones,
Amine phenols and the like can be used alone or in combination.

The developer also contains alkali metal sulfites, carbonates,
I) H buffers, bromides, such as borates and phosphates;
iodides, and organic antifoggants (particularly preferably nitroindazoles or benzotriazoles),
It may contain a development inhibitor or an antifoggant.

In addition, if necessary, water softeners, solubilizing agents, toning agents, development accelerators, surfactants, antifoaming agents, hardeners, film silver stain preventive agents (e.g. 2-mercap) to benzimidazole sulfone are added. It may also contain acids etc.

For specific examples of these additives, see Research Disclosure ↑l
-176 No. 17643, etc.

As the fixer, one having a commonly used composition can be used.

As a fixing agent, in addition to thiosulfate and thiocyanate,
Organic sulfur compounds known to be effective as fixing agents can be used.

Further, the fixing solution may contain a water-soluble aluminum salt or the like as a hardening agent.

In the present invention, a method may be adopted in which a developing agent is incorporated into the photosensitive material and the material is processed with an alkaline activator solution.

(Unexamined Japanese Patent Publication No. 57-129436, No. 57-129433
No. 57-129434, No. 57-129435, Mizuta Patent No. 4,323,643, etc.).

The processing temperature is usually selected between 18°C and 50'C! , (r
't', but the temperature may be lower than 18°C or higher than 50'C.

It is preferable to use an automatic processor for photographic processing.

In the present invention, even if the total processing time from when the photosensitive material is placed in an automatic processor until it comes out is set to 60 seconds to 120 seconds, the photographic characteristics of ultra-high contrast negative gradations can be sufficiently obtained.

(E) Example <Example 1> Average particle size 0.2 containing 97% ACIBr and 3% Al
A silver iodobromide emulsion consisting of 5μ cubic crystals was prepared by the double jet method, washed with water and redissolved by the usual method, and then
Chemical sensitization was performed using sulfur to thulium thiosulfate.

After dividing this silver iodobromide emulsion into 11 parts, compounds (1), (6), (10) (11) of the general formula (I> of the present invention)
and comparative compound (A>) in the amounts shown in Table 1, and then deposited on a polyester film per 1-rIt of silver!3.
It was applied so that it became 79.

After wet exposure was applied to the film sample prepared in this way, the film was exposed at 20° using a developer having the composition shown below.
Developing was performed at C for 1 to 5 minutes.

Developer solution Comparative compound (A> The results are shown in Table 1.

As is clear from Table 1, the compound of the present invention is different from the comparative compound (
It can be seen that compared to A>, the high-contrast photographic characteristics were achieved even after 20'C1 minute of development, and there was no increase in fog even after long-term development.

Furthermore, the sensitivity change due to the change in development time is different from that of the comparative compound (A>
It can be seen that the stability against development is high because it is extremely small compared to .

In addition, the unexposed part of each lean pull during the development process was removed,
Comparative compound (A> added - Rimple (No.

In 2.3), a clear sand force was already generated after 3 minutes of development time, whereas in the samples (Nos. 4 to 11) to which the compound of the present invention was added, no sand fog was observed. There wasn't.

<Example 2> Next, a part of the film sample obtained in Example 1 was heated at 40'C.
After heating for 30 days, it was exposed to light and exposed as in Example 1.
(20'C for 3 minutes) and compared with the sensitivity and fog values immediately after coating.

The results are shown in Table ■.

(See the margins below.) Table 2 As is clear from Table 2, the compounds of the present invention show extremely little change in sensitivity and increase in σ fog over time of storage.

<Example 3> Next, using another part of the film sample obtained in Example 1, a halftone quality test was conducted.

Using a 150 line gray contact screen,
After exposing each film sample to light via a sensimetry light wedge, it was incubated at 38°C with the same developer as before.
The image was developed for 0 seconds and the quality of halftone dots was checked.

The results are shown in Table ■.

The halftone dot quality is visually evaluated on a five-level scale, with 5 representing the best quality and 1 representing the worst quality. As halftone dot original plates for plate making, grades 5 and 4 are practically usable, grades 3 are poor but barely usable, and grades 2 and 1 are of a quality that is practically unusable.

(See blank below) Table ■> As is clear from Table ■, it can be seen that the compounds of the present invention exhibit good rope quality.

Claims (1)

[Claims] (1) A silver halide photographic light-sensitive material is expressed by the following general formula (I):
An image forming method characterized by developing in the presence of a compound represented by: General Formula (I) ▲ Numerical formulas, chemical formulas, tables, etc. are available▼ [In the formula, Ar represents an aryl group, and R_1 and R_2 represent a hydrogen atom or a group represented by the general formula (II). R_3 and R_4 are hydrogen atoms, alkyl groups, aryl groups,
Represents an unsaturated heterocyclic group or a substituted amino group. Furthermore, R_3 and R_4 may be connected to each other to form a ring. ] General formula (II) ▲ Numerical formulas, chemical formulas, tables, etc. are available ▼ [In the formula, R_0 represents an alkyl group, alkenyl group, aryl group, alkoxy group, or aryloxy group, and n represents an integer of 1 or 2. ]