JPH0443341A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To obtain excellent whiteness and high sensitivity by incorporating at least one kind of specific sensitizing dyes into at least one layer of photographic constituting layers. CONSTITUTION:At least one kind of the sensitizing dyes expressed by formula [I] are incorporated into at least one layer of the photographic constituting layers. In the formula I, Y1, Y2 respectively denote the nonmetal atom group necessary for forming hetero rings consisting of a benzothiazole ring, benzoselenazole ring, naphthothiazole ring, naphtoselenazole ring or quinoline ring; R1, R2 respectively denote a lower alkyl group, alkyl group having a sulfonic acid group or alkyl group having a carboxyl group; R3 denotes a methyl group, ethyl group, propyl group; X denotes anion; n1, n2 denote 1 or 2. High sensitivity is obtd. in this way and whiteness is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a silver halide photographic light-sensitive material, and more particularly to a silver halide photographic light-sensitive material such as a red-sensitive paper with high sensitivity and excellent zero degree.

[Background of the Invention] Photographic paper (also referred to as paper) is usually manufactured by providing a silver halide emulsion layer on a paper support, but in recent years there has been a demand for short delivery times for products using this paper. As a result, shortening the working time has become an issue, and efforts are being made to improve processing equipment, such as ultra-quick processing.

On the other hand, on the side of sensitive materials such as paper, efforts are being made to increase the sensitivity and to shorten the exposure time. However, in the case of red-sensitive paper, although it is possible to increase the sensitivity by increasing the amount of sensitizing dye, this is not a preferred method because residual color becomes noticeable and the paper fades, resulting in a fatal defect.

Therefore, the present inventors investigated various structures of sensitizing dyes in order to solve the above problems of sensitizing dyes, and in the structure, Y,
Dye sensitization using a dye that also has an asymmetrical mother nucleus by having different heterocycles, that is, the left and right sides of the sensitizing dye, yields high sensitivity and excellent whiteness. It was discovered that paper could be obtained, and the present invention was made based on this finding.

[Object of the Invention] Therefore, an object of the present invention is to provide a silver halide photographic material such as paper that has excellent whiteness and high sensitivity.

[Structure of the Invention] The above objects of the present invention are as follows: 1) A silver halide photographic light-sensitive material having a photographic constituent layer including at least a silver halide emulsion layer on a support,
A silver halide photographic light-sensitive material characterized in that at least one of the photographic constituent layers contains at least one sensitizing dye represented by the general formula [I].

(X”).

[In the formula, Y and Y2 each represent a group of nonmetallic atoms necessary to form a heterocycle consisting of a hendithiazole ring, a henzoselenazole ring, a naphthothiazole ring, a naphthoselenazole ring, or a quinoline ring; The heterocycle may be substituted with a lower alkyl group, an alkoxy group, an aryl group, a hydroxy group, an alkoxycarbonyl group, or a halogen atom. However, Y+ and Y2 are different.

R, , R, each represent a lower alkyl group, an alkyl group having a sulfonic acid group, or an alkyl group having a carboxyl group.

R5 represents a methyl group, an ethyl group, or a propyl group. X represents an anion, n1in2 represents 1 or 2, 0m represents 1 or 0, and when m is 0, it represents an inner salt. 2) A silver halide photographic material, wherein the support described in item 1 above is a base paper treated with a polyolefin resin on both sides.

3) This is achieved by a silver halide photographic material characterized by containing a fluorescent brightener in the photographic constituent layer described in item 1 or item ``$2'' above.

The present invention will be explained in more detail below.

In the compound represented by the general formula [11] used in the present invention, R+ and R2 are lower alkyl groups, and the lower alkyl group preferably has 1 to 4 carbon atoms, such as methyl group, ethyl group, etc. can be mentioned. These groups can also have substituents.

The alkyl component of the alkyl group having a sulfo group or a carboxyl group preferably has 1 to 4 carbon atoms,
Examples include methyl group, ethyl group, i-propyl group, and butyl group.

Examples of the aryl group include a phenyl group.

The sensitizing dye having the structure represented by the general formula [1] used in the present invention has an excellent effect on residual color after photographic processing,
When this dye is combined with the above-mentioned fluorescent whitening agent, high sensitivity and even better whiteness can be obtained.

Next, typical examples of the compound represented by the general formula [1] used in the present invention will be listed, but the present invention is not limited thereto.

■ ■ ■ ■ ■ -15 ■-16 ■-17 SOlo ■ ■-20 The optical brightener is contained in at least one of the photographic constituent layers including the hydrophilic colloid layer on the support, This fluorescent whitening agent has the following formula [■-a), cm-b], (
Compounds represented by I[-C) and [■-d] can be preferably used).

(I[-a) (n-b) (n=c) CII-dl Not limited to these.

(Left below) General formulas (■-a), [■-b], [■-C], (II-
In d), Yl and Y2 represent an alkyl group, Zl
and Zt represents a hydrogen atom or an alkyl group, n is 1 or 2++ RIt Rz+ R4 and Rs are an aryl group, an alkyl group, an alkoxy group, an aryloxy group,
Hydroxy group, amino group, cyano group, carboxyl group,
Represents an amide group, an ester group, an alkylcarbonyl group, an alkylsulfo group, a dialkylsulfonyl group, or a hydrogen atom.

R6 and R1 represent a hydrogen atom or an alkyl group (methyl group, ethyl group, etc.).

R16 represents a phenyl group, a halogen atom or an alkyl-substituted phenyl group, and R+s represents an amino group or an organic or secondary amine.

Next, general formulas (It-a), (II-b), (IT-c)
Specific examples of the compound represented by [■-d] are given below. (II
-1) (II-2) (It-6) H2 (n-3) [■-7] (It-13) [■-9] (If-10) (n-15) [■! 6) [:I[-17] (It-113 (n-12) [■-13] (I[-14) [■-18] Hj (I[-19) (n-20) (If-21 ) (It-22) (n-26) (II-23) (Hereafter the margins) (II-24) (It-25) The amount of the above fluorescent brightener used is preferably 1 mg/image in the finished photographic paper. ~200a+g/bo, more preferably 5
It ranges from mg/bo to 50 tsg/bo.

The above-mentioned exemplary optical brighteners may be used alone or in combination of two or more. Further, fluorescent brighteners other than the above-mentioned fluorescent brighteners can be used in combination.

When a fluorescent whitening agent is used in combination, it is preferable that the total amount equals the above amount.

The layer to which the optical brightener is added may be in any layer among the photographic constituent layers including the antihalation layer on the support, but it is preferably added to both the silver halide emulsion layer and the antihalation layer.

The method of adding the optical brightener of the present invention is to dissolve a high-boiling point compound in a solvent together with a low-boiling point solvent if necessary, mix it with an aqueous gelatin solution containing a surfactant, and use a colloid mill, homogenizer, or ultrasonic dispersion. It is added as an emulsified dispersion using an emulsifying device such as an emulsifying device.

The silver halide emulsions used in the present invention include conventional silver halide emulsions such as silver bromide, silver iodobromide, silver iodochloride, silver chlorobromide, silver chloroiodobromide, and silver chloride. Any used can be used.

The silver halide grains may have a uniform silver halide composition distribution within the grain, or may be core/shell grains in which the silver halide composition differs between the inside of the grain and the surface layer.

The silver halide grains may be such that a latent image is mainly formed on the surface, or may be such that a latent image is mainly formed inside the grain.

The silver halide grains may have a regular crystal shape such as a cube, octahedron, or dodecahedron, or may have an irregular crystal shape such as a spherical or plate shape. In these particles, any ratio of the (100) plane to the (Ill) plane can be used.

Further, the particles may have a composite form of these crystal forms, or particles of various crystal forms may be mixed.

The grain size of silver halide grains is 0.05 to 3
A vine with a diameter of 0μ, preferably 0.1 to 20μ is used.

The silver halide emulsion may have any grain size distribution. An emulsion with a wide grain size distribution (referred to as a polydisperse emulsion) may be used, or an emulsion with a narrow grain size distribution (referred to as a monodisperse emulsion) may be used alone or in combination.

Further, a polydisperse emulsion and a monodisperse emulsion may be mixed and used.

The silver halide grains used in the emulsion of the present invention are formed by cadmium salts, zinc salts, lead salts, thallium salts, iridium salts or complex salts, rhodium salts or complex salts, iron salts, etc. Alternatively, it is preferable to add a metal ion using a complex salt and include it inside the particles and/or on the particle surface, and it is particularly preferable that the rhodium salt or complex salt is present in an amount of 10-8 to 10-6 mol per mol.

In the emulsion of the present invention, unnecessary soluble salts may be removed after the growth of silver halide grains is completed, or they may remain contained.

Although the photosensitive silver halide emulsion can be used as a so-called post-thermal (Pr1mltive) emulsion without chemical sensitization, it is usually chemically sensitized.

Chemical sensitization can be carried out either alone or by sulfur sensitization using active gelatin or a sulfur-containing compound that can react with silver ions, reduction sensitization using reducing substances, and noble metal sensitization using gold or other noble metal compounds. Can be used in combination. As the sulfur sensitizer, thiosulfates, thioureas, thiazoles, rhodanines, and other compounds can be used.

Further, there are no particular restrictions on the conditions such as pu, llAg, temperature, etc. during chemical sensitization, but the pH value is preferably kept at 4-9, especially 5-8, and the pAg value is kept at 5-11, especially 8-10. is preferable. In addition, the temperature is 40℃~9'
0°C, especially 45°C to 75°C is preferred.

In addition to the aforementioned sulfur sensitization and gold/sulfur sensitization, the silver halide emulsion used in the present invention can be produced by reduction sensitization using a reducing substance.
A noble metal sensitization method using a noble metal compound can also be used in combination.

As the photosensitive emulsion, the above emulsion may be used alone,
Two or more emulsions may be mixed.

When carrying out the present invention, for example, 4-hydroxy-6-methyl-1,3,
Various stabilizers can also be used, including 3a,7-titrazaindene, 5-mercapto-1-phenyltetrazole, 2-mercaptobenzothiazole, and the like.

As the hydrophilic colloid that can be used in the silver halide emulsion layer and intermediate layer used in the present invention, it is advantageous to use gelatin, but other hydrophilic colloids can also be used alone or together with gelatin.

In the present invention, the gelatin may be either lime-treated or acid-treated. Details of the method for producing gelatin are described in The Macromolecular Chemistry of Gelatin, written by Arthur Vuis (Academic Press, published in 1964).

Examples of the hydrophilic colloids include gelatin conductors, graft polymers of gelatin and other polymers, proteins such as albumin and casein; cellulose conductors such as hydroxyethyl cellulose, carboxymethyl cellulose, and cellulose sulfate esters, and sodium alginate. ,
Sugar derivatives such as starch conductors: Various types such as single or copolymers of polyvinyl alcohol, polyvinyl alcohol partial acetal, poly-N-vinylpyrrolidone, polyacrylic acid, polymethacrylic acid, polyacrylamide, polyvinylimidazole, polyvinylpyrazole, etc. The 6 sensitizing dyes used in the present invention are synthetic wood-philic polymer substances.
It is used at the same concentration as that used in ordinary negative-working silver halide emulsions. In particular, it is advantageous to use the dye at a concentration that does not substantially reduce the inherent sensitivity of the silver halide emulsion. Approximately 1.0% of sensitizing dye per mole of silver halide. Ox i
o-' to about 5 X to-' moles are preferred, especially about 4 X to-' to about 4 X to-' moles of sensitizing dye per mole of silver halide.
It is preferable to use a concentration of x10=4 mol.

One type of sensitizing dye or a combination of two or more types can be used, and sensitizing dyes other than those mentioned above may be used in combination.

A color coupler may be added to the silver halide photographic material of the present invention, if necessary, and for example, at least one of a cyan coupler, a magenta coupler, and a yellow coupler is added.

The silver halide photographic material according to the present invention may contain water-soluble dyes other than those mentioned above as filter dyes in the hydrophilic colloid layer or for various purposes such as preventing irradiation and halation.

Such dyes include oxonol dyes, hemioxonol dyes, styryl dyes, merocyanine dyes, cyanine dyes, azo dyes, and the like. Among them, oxonol dyes: hemioxonol dyes and merocyanine dyes are useful.

In the silver halide photographic light-sensitive material according to the present invention, when dyes, ultraviolet absorbers, etc. are included in the wood-philic colloid layer, they may be mordanted with a cationic polymer or the like.

Various compounds can be added to the above photographic emulsion in order to prevent a decrease in sensitivity and generation of capri during the manufacturing process, storage or processing of the silver halide photographic light-sensitive material.

The silver halide photographic light-sensitive material of the present invention contains antifoggants, ultraviolet light inhibitors, antistatic agents, matting agents, surfactants, thickeners, plasticizers, hardeners, and coating aids that are commonly used in light-sensitive materials. Agents, emulsifiers, modifiers, antifoaming agents, matting agents, slipping agents, toning agents, and the like can be used.

In the manufacturing method of the present invention, the pH of the coating liquid is 5.3 to 7.
．． It is preferable that it is in the range of 5. For multi-layer coating,
It is preferable that the pH of the coating liquid obtained by mixing the coating liquids for each layer in the ratio of coating amounts is within the above range of 5.3 to 7.5. If the pH is less than 5.3, the progress of hardening will be slow, which is undesirable, and if the pH is greater than 7.5, it will often have an adverse effect on photographic performance, which is undesirable.

The photosensitive material of the present invention may further contain various additives depending on the purpose.

These additives are described in more detail in Research Disclosure Vol. 176 Item/7643 (1978, 1).
February) and Volume 187 Item/8716 (197
(November 9).

In carrying out the silver halide photographic material of the present invention, for example, the emulsion layer and other layers can be constructed by coating on one or both sides of a flexible support commonly used in photographic materials.

Supports used in the present invention, particularly those useful as flexible supports, consist of semi-synthetic or synthetic polymers such as cellulose nitrate, cellulose acetate, cellulose acetate butyrate, polyethylene, polyvinyl chloride, polyethylene terephthalate, polycaponate, etc. film, baryta layer or α-
Paper coated with or laminated with an olefin polymer (eg, polyethylene, polypropylene, ethylene/butene copolymer), etc. Preferably, the paper is coated or laminated with polyolefin resin on both sides, and preferred polyolefin resins include, for example, resins such as polyethylene, polypropylene, and ethylene/butene copolymer. The support may be colored using dyes or pigments.

It may be made black for the purpose of blocking light. The surface of these supports is generally treated with an undercoat to improve adhesion with emulsion layers and the like.

The surface of the support may be subjected to corona discharge, ultraviolet irradiation, flame treatment, etc. before or after the undercoating treatment.

In the silver halide photographic light-sensitive material according to the present invention, the photographic emulsion layer and other hydrophilic colloid layers can be coated on the support or on other layers by various coating methods. For coating, a dip coating method, a roller coating method, a curtain coating method, an extrusion coating method, etc. can be used.

The photographic processing of the silver halide photographic material according to the present invention is as follows:
There are no particular limitations, and various methods can be used. For example, research disclosure (Research Disclosure)
closure) No. 176, pages 28-30 (RD17
The 6IA temperature at which any of the various methods and various processing solutions can be applied, such as those described in 643), is usually chosen between 18°C and 50°C, but is generally between 18°C and 50°C.
Lower temperatures or temperatures above 50°C may also be used.

As the developing agent, dihydroxybenzenes (e.g. hydroquinone), 3-pyrazolidones (e.g. 1-phenyl-3-pyrazolidone), aminophenols (e.g. N-methyl-〇-aminophenol), etc. are used alone or in combination. be able to.

Developing solutions generally contain various preservatives, alkaline agents, and p.
HM buffer 1 Contains antifoggants, etc., and further contains dissolving aids, color toning agents, development accelerators, surfactants, antifoaming agents, etc. as necessary.
It may also contain a water softener, a hardening agent, a viscosity imparting agent, and the like.

As the fixer, one having a commonly used composition can be used. As the fixing agent, in addition to thiosulfates and thiocyanates, organic sulfur compounds known to be effective as fixing agents can be used. The fixer may contain a water-soluble aluminum salt as a hardening agent.

Exposure for the silver halide emulsion used in the present invention varies depending on the state of chemical sensitization, purpose of use, etc., but includes tungsten, fluorescent lamps, mercury lamps, arc lamps, xenon sunlight, xenon flash, cathode ray tube flying spot, laser light, Various types of light sources such as LED light sources and electron beams can be used as appropriate.

The exposure time is 171,000 to 100 seconds for normal exposure, as well as xenon flash, cathode ray tube, and laser light.
Short-time exposures of /10' to 1/10' seconds can be applied.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples of the present invention, but the present invention is not limited to these examples.

Example 1 (Preparation of optical brightener emulsified dispersion) 0.8 g of oil-soluble optical brightener (II-13) was mixed with 25 mj of talesyl diphenyl phosphate! was dissolved in 12 mL of 1-butanol and mixed with a 5% aqueous gelatin solution at 260 mC containing 0.5 g of triisopropylnaphthalenesulfonic acid sodium salt, and an emulsified dispersion was prepared by ultrasonic dispersion.

(Preparation of silver halide emulsion layer coating solution) ■Silver halide grain formation process solution 1 Ossein gelatin 20g water
4
00m℃ solution 2 AgNOs 60 g
water
250mfl.

Solution 3 Ag (1 Br Aqueous solution 4 Br I water Ammonia water (28%) Solution 5 1%, RhBra 25% KBr solution 6 0.5% 2 [1r (IV) Cua l solution
0.75 g water
into 36.75 mL solution 1,
5 to 2 ml of solution (the amount of rhodium salt added is 1 ml of silver halide)
4.2
After aging for 0 minutes, solution 4 was injected over 1 minute, and after the injection of solution 4 was completed, 0.25 ml was added from solution 6 (the amount of iridium salt added was determined by the halogen 2.9 x 10-' moles per mole of silveride) were taken and added.

After addition of solution 6 and aging for 20 minutes, acetic acid (20%) was added to adjust the pH to 5.7.

(2) Desalting step Next, Solution 7 below was added to this prepared solution and stirred for 5 minutes.

Solution 7 Agglomerated gelatin agent (amino group substitution-〇〇N) I-ζ) Modification rate 90%) 1z
8 water
Thereafter, the pH was adjusted to 4.4 with acetic acid to flocculate the gelatin and the supernatant liquid was drained.

Next, add pure 3J2, further add NaOH, and pi(
4.9 (l) and stirred and dispersed. Thereafter, the pH was adjusted to 4.60 again with acetic acid to flocculate and precipitate the gelatin, and the supernatant liquid was drained.

This operation was repeated to perform desalting three times in total, and then 100g of phenol and 4 mg of the following compound [a] were added as an anti-pyre agent, and the pH was finally adjusted to 5.90 to obtain emulsion A.

Compound [a] r ■ Preparation process of coating solution for silver halide emulsion layer Emulsion A thus obtained was kept at 59°C, and calcium chloride 27
Added 0 mg 1 mol Ag, ammonium thiocyanate,
Optimal chemical sensitization was performed by adding chloroauric acid and sodium thiosulfate.

then Stabilizer: 6-methyl-4 -Hydroxy-1,3,3a.

7-chitrazaindene 1.7g 1 mol Ag
Sensitizing dye 2 Shown in Table 1 Antifoggant = 1-phenyl-5-mercaptotetrazole 60 mg 1 mol Ag coating aid Sodium nitriisopropylnaphthalene sulfonate 1 g 1 mol Ag film property improver: Polyethyl acrylate latex 6087 mol 8 8g/mole of 8g diethylene glycol was added, and the optical brightener emulsified dispersion prepared above was added at a concentration of 30 wg/m2 (however, N087 was not added), and styrene-anhydride was added as a binder. Maleic acid copolymer, 1:0 of tetrakis(vinylsulfonylmethyl)methane and taurine potassium salt as a hardening agent
．． A 25 mol reaction product was added in an amount of 30 mg per 1 g of gelatin, and the pH was adjusted to 5.5 with citric acid to prepare a coating solution for a silver halide emulsion layer.

(Adjustment of coating solution for protective layer) Add a matting agent to the gelatin binder with an average particle size of 3.
70mg/+u' of 5μm polymethyl methacrylate
, 2-sulfonate bissuccinate (
6 mg of 2-ethylhexyl) ester sodium salt
/m', the following compound (b) as a fluorine-containing surfactant
14 rAg/l112, 25 mg of formalin per 1 g of gelatin was added as a hardening agent, and 1 m of 1-phenyl-5-mercaptotetrazole was added as an antifoggant.
g7m2 was added, the pH was adjusted to 5.5 with citric acid,
A coating solution for a protective layer was prepared.

Compound (b) (Coating) The coating solution for the silver halide emulsion layer and the coating solution for the protective layer thus prepared were coated in multiple layers on a 110 μm thick polyethylene coated paper having a hydrophilic colloid backing layer and an undercoat layer. did.

In addition, immediately before application (within 10 seconds), 1-phenyl-3-pyrazolidone (0.7 g per 1 mole of silver) and the following compound (i
) was added to the coating solution for a silver halide emulsion layer.

Compound (i) No(:JSO3Na (Exposure) The sample thus prepared was exposed to light for 10-8 seconds from a Helium Neon (He-Na) laser light source through an optical wedge.

(Processing) After the above exposure, development was performed using a developer having the composition shown below, followed by fixing, washing with water, and drying. Automatic developing machine GR-2 is used for development.
6 (manufactured by Konica Corp.) was used. (Development temperature is 38℃
, development time is 20 seconds).

(Developer prescription) Pure water (ion exchange water) Approx. 800mj! Potassium sulfite 60 g Ethylenediaminetetraacetic acid disodium salt 2 g Potassium hydroxide 10.5 g 5-Methylbenzotriazole 300 mj2 diethylene glycol 25 g 1-phenyl-4
,4-dimethyl-3-pyrazolidone 300mjZ1-
Phenyl-5-mercaptotetrazole 60 mλ Potassium bromide 3.5 g Hydroquinone 20 g Potassium carbonate
15g pure water (ion exchange water)
Add to make it 100100O. p) of developer solution
l was approximately 10.8.

(Fixer formulation) (Composition A) Ammonium thiosulfate (72.5% W/V aqueous solution) 24o
mx sodium sulfite 17g
Sodium acetate trihydrate 6.5g Boric acid 6° Sodium citrate dihydrate 2g Acetic acid (90% W
/W aqueous solution) 13.6 mu (composition) Pure water (ion exchange water) 1-/mI
L sulfuric acid (50% W/W aqueous solution) 4.
7 g aluminum sulfate (AJZ20.tA content is 8
．． 1% w/w aqueous solution) When using 26.5 g fixer, the above composition A1 in 500 mft of water
They were dissolved in the order of their composition and used in one sentence. The pH of this fixer was about 4.3.

Sakura Digital Densitometer PDA measures the reflection density of the sample after processing.
-65 model (manufactured by Konica Corp.) to evaluate photographic properties.

The sensitivity was expressed as the reciprocal of the exposure amount required to obtain a blackening density of 1.0, and was expressed as a relative sensitivity, with the sensitivity of sample No. 1 being 100. In addition, γ indicates the slope of the straight line part of the characteristic curve,
The larger γ is, the higher the contrast is.

In addition, the white skin was visually evaluated on a 5-grade sensory evaluation. A larger value indicates better results.

The results obtained are shown in Table-1.

Margin below Comparative sensitizing dye A Comparative sensitizing dye B Comparative sensitizing dye C tl12J 33UsH shi2i111 As is clear from Table 1, sample No. of the present invention.

It can be seen that Samples Nos. 1 to 5 have high sensitivity and good whiteness.

Further, as in the comparison, when the amount of sensitizing dye exceeds 300 mg 1 mol Ag, as in sample No. 016, the whiteness deteriorates.

On the other hand, samples using sensitizing dyes with symmetrical cores, such as Sample No. 8, have good sensitivity but poor whiteness.

Furthermore, as in Sample No. 9, when attempting to maintain brightness by reducing the amount of sensitizing dye, the sensitivity significantly decreases. Similarly, in the case of comparison, sample No. 10.11 has good sensitivity but poor whiteness.

Example 2 Samples No. 11 to No. 11 prepared in Example 1 were processed and evaluated in the same manner as in Example, except that the helium-neon light source was replaced with an LED light source. The result is
As in Example 1, the sample of the present invention had high sensitivity and excellent whiteness.

[Effects of the Invention] According to the present invention, by using a compound represented by the formula [I], high sensitivity can be obtained and whiteness can be improved.

By further adding an optical brightener, a -layer whiteness can be obtained.

Claims (1)

[Scope of Claims] 1) A silver halide photographic light-sensitive material having a photographic constituent layer including at least a silver halide emulsion layer on a support,
A silver halide photographic light-sensitive material characterized in that at least one of the photographic constituent layers contains at least one sensitizing dye represented by the general formula [I]. ▲There are mathematical formulas, chemical formulas, tables, etc.▼ [In the formula, Y_1 and Y_2 are each a compound necessary to form a heterocycle consisting of a benzothiazole ring, benzoselenazole ring, naphthothiazole ring, naphthoselenazole ring, or quinoline ring. Represents a group of nonmetallic atoms, and these heterocycles may be substituted with a lower alkyl group, an alkoxy group, an aryl group, a hydroxy group, an alkoxycarbonyl group, or a halogen atom, provided that Y_1 and Y_2 are different. R_1 and R_2 each represent a lower alkyl group, an alkyl group having a sulfonic acid group, or an alkyl group having a carboxyl group. R_3 represents a methyl group, an ethyl group, or a propyl group. X represents an anion, and n_1 and n_2 represent 1 or 2. m
represents 1 or 0, and when m is 0, it represents an inner salt. 2) A silver halide photographic material, wherein the support according to claim 1 is a base paper treated with a polyolefin resin on both sides. 3) A silver halide photographic light-sensitive material, characterized in that the photographic constituent layer according to claim 1 or 2 contains a fluorescent brightener.