JPH07319099A - Silver halide photographic material - Google Patents

Abstract

PURPOSE:To procide a film for a scanner which has a small variation rate of a mesh-point area for variation of the exposure quantity. CONSTITUTION:In a silver halide photographic material, a first photosensitive silver halide emulsion layer sensitized spectrally in 440-500nm and a second silver ahlide emulsion layer of sensitivity lower than that of the first silver ahlide emulsion layer sensitized spectrally in 440-500nm are disposed in order on a support member and hydrazine compound is contained; a nucleation acceierator is contained; and a scanner film for laser exposure is used.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a silver halide photographic light-sensitive material, and more particularly to a scanner film used in a printing plate making process.

[0002]

2. Description of the Related Art A scanner film for printing plate making is capable of forming a halftone dot image by laser exposure. However, with a halftone dot formed by conventional laser exposure, a pattern called a rosette appears on the printed matter, impairing the quality of the printed matter. There was an occasion. On the other hand, in recent years high-definition printing and FM
A screening technique, such as screening, in which the size of halftone dots is smaller than before has been developed, and it is becoming popular in the market as a screening method that does not cause rosettes and has excellent reproducibility of details.

However, a problem with these techniques is that the rate of change of the halftone dot area% with respect to the change in the exposure amount is larger than that in the conventional screening method, that is, the exposure latitude is smaller, and the halftone dot area is reduced. This is an obstacle to improving the image quality.

On the other hand, an inner drum type or flat bed type exposure apparatus is becoming popular in place of the conventional drum type scanner because of the demand for downsizing and handling of the apparatus. The lower the value, the higher the halftone dot change rate with respect to the change in the exposure amount, resulting in a decrease in workability.

[0005]

Due to the above circumstances, even when high-definition printing or FM screening is performed using an inner drum type or flat bed type exposure apparatus, the halftone dot change rate with respect to the exposure amount change due to exposure. It is also necessary to consider making the scanner film side smaller.

Accordingly, it is an object of the present invention to provide a scanner film having a small rate of change in the halftone dot area with respect to a change in exposure amount and having excellent contrast.

[0007]

The above object of the present invention comprises a first photosensitive silver halide emulsion layer spectrally sensitized to 440 to 500 nm on a support and a first photosensitive silver halide emulsion. A silver halide photographic light-sensitive material containing a hydrazine compound having a second silver halide emulsion layer spectrally sensitized to 440 to 500 nm with low sensitivity in this order, and the light-sensitive material containing a nucleation accelerator And the photosensitive material is a scanner film for laser exposure.

That is, the inventors of the present invention have made extensive studies in order to increase the exposure latitude of the light-sensitive material in order to reduce the rate of change of the halftone dot area with respect to the change of the exposure amount, and as a result, the present invention has been achieved. .

The present invention will be described in detail below.

The silver halide photographic light-sensitive material of the present invention (hereinafter also referred to as light-sensitive material) comprises at least two light-sensitive silver halide emulsion layers having different sensitivities which are spectrally sensitized to 440 to 500 nm on a support. And forms a silver image as a final image. A second emulsion layer (hereinafter, also referred to as an upper layer) farther from the low-sensitivity support and a first emulsion layer (hereinafter, also referred to as a lower layer) closer to the high-sensitivity support are adjacent to each other. Alternatively, one or more intermediate layers may be provided between both layers. In addition to these emulsion layers, an emulsion layer having a desired spectral sensitivity or a non-photosensitive emulsion layer can be provided at a desired position. Further, it may have a non-photosensitive hydrophilic colloid layer.

The light-sensitive material of the present invention comprises a developing agent, a sensitizer, a dye, a sensitizing dye, a binder, an activator, an antistatic agent, a matting agent, a film hardener, a coating aid, a color tone adjusting agent and a pH. Any additives necessary for producing a photosensitive material and for exhibiting and maintaining photographic performance, such as an adjusting agent, a salt concentration adjusting agent, a stabilizer, and a photosensitive substance, can be included.

In the present invention, the difference in sensitivity between the first emulsion layer and the second emulsion layer is the logarithm of the reciprocal of the amount of light giving a density of 1.0.
0.01 to 1.0 is preferable, and 0.03 to 0.5 is particularly preferable.

Any means known in the art can be used as a means for providing a difference in sensitivity between the two emulsion layers. That is, the presence or absence of chemical sensitization, the difference in degree, the kind and amount of metal doping, the kind and amount of sensitizing dye, the difference in grain size of silver halide, the addition of more filter dye to the upper layer side, a development accelerator, There are various means such as effective addition of a suppressor and addition of a development modifier containing a timing group, which can be used alone or in combination.

The photographic characteristics of each emulsion layer are preferably high contrast, and it is particularly preferable that γ giving a density of 1 to 2.5 is 10 or more. It is still more preferable that γ as the photosensitive material is 10 or more.

The light-sensitive material of the present invention preferably contains a hydrazine compound.

Examples of the hydrazine compound that can be used in the present invention include those represented by the following general formula [H].

[0017]

[Chemical 1]

In the formula, A is an aliphatic group which may have a substituent (preferably an alkyl group having 1 to 30 carbon atoms, particularly preferably a linear, branched or cyclic alkyl group having 1 to 20 carbon atoms), It represents an aromatic group (preferably a monocyclic or condensed ring aryl group) or a heterocyclic group (preferably a monocyclic or condensed ring heterocyclic ring containing at least one heteroatom selected from nitrogen, sulfur and oxygen). Particularly preferred are aryl groups and heterocyclic groups which may have a substituent.

As the substituent, an alkyl group (preferably having a carbon number of 1 to 20), an aralkyl group (preferably a monocyclic or condensed ring having an alkyl portion having a carbon number of 1 to 3), an alkoxy group (preferably 1 to 20 carbon atoms in the alkyl part
), A substituted amino group (preferably an amino group substituted with an alkyl group having 1 to 20 carbon atoms or an alkylidene group),
Acylamino group (preferably having 1 to 40 carbon atoms), sulfonamide group (preferably having 1 to 40 carbon atoms), ureido group (preferably having 1 to 40 carbon atoms), hydrazinocarbonylamino group (preferably Are those having 1 to 40 carbon atoms), hydroxyl groups, phosphoamide groups (preferably having 1 to 40 carbon atoms), and the like.

Further, A preferably contains at least one diffusion resistant group or silver halide adsorption promoting group. The diffusion resistant group is preferably a ballast group commonly used in non-moving photographic additives such as couplers, and the ballast group has 8 carbon atoms.
Examples thereof include an alkyl group, an alkenyl group, an alkynyl group, an alkoxy group, a phenyl group, a phenoxy group, an alkylphenoxy group and the like, which are relatively inactive to the above photographic properties.

As the silver halide adsorption promoting group, thiourea, thiourethane group, mercapto group, thioether group,
Examples thereof include a thione group, a heterocyclic group, a thioamide heterocyclic group, a mercapto heterocyclic group, and an adsorbing group described in JP-A No. 64-90439.

B is an acyl group (eg formyl, acetyl, propionyl, trifluoroacetyl, methoxyacetyl, phenoxyacetyl, methylthioacetyl, chloroacetyl, benzoyl, 2-hydroxymethylbenzoyl, 4-chlorobenzoyl etc.), an alkylsulfonyl group ( For example, methanesulfonyl, 2-chloroethanesulfonyl, etc.), arylsulfonyl group (eg, benzenesulfonyl, etc.), alkylsulfinyl group (eg, methanesulfinyl, etc.), arylsulfinyl group (benzenesulfinyl, etc.), carbamoyl group (eg, methylcarbamoyl, phenylcarbamoyl, etc.) ), An alkoxycarbonyl group (eg, methoxycarbonyl, methoxyethoxycarbonyl, etc.), an aryloxycarbonyl group (eg, phenoxycarbonyl, etc.), Sulfamoyl group (eg dimethylsulfamoyl etc.), sulfinamoyl group (eg methylsulfinamoyl etc.), alkoxysulfonyl group (eg methoxysulfonyl etc.), thioacyl group (eg methylthiocarbonyl etc.), thiocarbamoyl group (eg methylthiocarbamoyl etc.) , Oxalyl group, or heterocyclic group (eg, pyridine ring, pyridinium ring, etc.).

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

[0024]

[Chemical 2]

May be formed.

R ₁ represents an alkyl group, an aryl group or a heterocyclic group, and R ₂ 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 preferable.

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 ( Etoxaryl etc.)

Specific examples of the compound represented by the general formula [H] are shown below, but the invention is not limited thereto.

[0030]

[Chemical 3]

[0031]

[Chemical 4]

[0032]

[Chemical 5]

[0033]

[Chemical 6]

[0034]

[Chemical 7]

[0035]

[Chemical 8]

[0036]

[Chemical 9]

A method for synthesizing a hydrazine compound is described in JP-A-62-1.
80361, 62-178246, 63-234245, 63-234246
No. 64-90439, JP-A-2-37, No. 2-841, No. 2-947
Nos. 2-120736, 2-230233, 3-125134, U.S. Patents 4,686,167, 4,988,604, 4,994,365, European Patents 253,665, 333,435, etc. Can be The amount used is preferably 5 × 10 ^{−7 to} 5 × 10 ⁻¹ mol, and particularly preferably 5 × 10 ^{−6 to} 5 × 10 ⁻² mol per mol of silver halide.

When the hydrazine compound is contained in the photographic light-sensitive material, it is contained in the silver halide emulsion layer or the hydrophilic colloid layer adjacent to the silver halide emulsion layer.

A nucleation accelerator is added to the light-sensitive material of the present invention.
It may be contained, and it is preferable to contain a nucleation accelerator especially when the processing is carried out with a developer having a pH of less than 11.

Examples of the nucleation accelerator include those represented by the following general formula [Na] or [Nb].

[0041]

[Chemical 10]

In the general formula [Na], R ₁₁ , R ₁₂ and R ₁₃ are each a hydrogen atom, an alkyl group, a substituted alkyl group,
It represents an alkenyl group, a substituted alkenyl group, an alkynyl group, an aryl group or a substituted aryl group. R ₁₁ , R ₁₂ , R
₁₃ can combine with each other to form a ring. Particularly preferred are aliphatic tertiary amine compounds.

These compounds preferably have a diffusion resistant group or a silver halide adsorption group in the molecule. In order to have diffusion resistance, a compound having a molecular weight of 100 or more is preferable, and more preferably 300 or more. Examples of preferable adsorption groups include nitrogen-containing heterocyclic groups, mercapto groups, thioether groups, thione groups and thiourea groups.

In the general formula [Nb], R ₂₁ and R ₂₂ each represent a substituted or unsubstituted aryl group, aromatic heterocyclic group or hydrogen atom.

These compounds preferably have a diffusion resistant group or a silver halide adsorption group in the molecule. The molecular weight is preferably 120 or more, and particularly preferably 300 or more, in order to have preferable diffusion resistance.

Specific compounds represented by the general formulas [Na] and [Nb] include those shown below.

[0047]

[Chemical 11]

[0048]

[Chemical 12]

[0049]

[Chemical 13]

[0050]

[Chemical 14]

When these are contained in the light-sensitive material, they are contained in at least one silver halide emulsion layer or a hydrophilic colloid layer adjacent to the silver halide emulsion layer. It is particularly preferably contained in the silver halide emulsion layer.

The light-sensitive material of the present invention is mainly used for forming a halftone image by laser exposure. In recent years, the integration of characters and images on output machines has progressed, and in many cases not only images (patterns) with halftone dots but also characters and line drawings are output at the same time. Can also be used.

As the laser light having a wavelength of 440 to 500 nm used for the exposure, Ar laser, He-Cd laser or the like is used. The form of the exposure device may be a drum type as well as an inner drum type and a flat bed type.

The effect of the present invention is that the size of each halftone dot giving halftone dots having a halftone dot area ratio of 50% is 50 μm or less (0.1 to 50 μm).
It can be particularly remarkably obtained when performing high-definition printing or FM screening (1 to 25 μm). When the halftone dot is large, the problem of exposure latitude does not appear so conspicuously, but the image quality is not so different from that of the conventional 175 lines / inch. The size of the point giving 50% is 50 μm
In high-definition printing, this is equivalent to about 400 lines / inch, and a marked improvement in print quality can be seen. In FM screening, the percentage of halftone dots is the same, but the size of the basic halftone dots is the same, so image quality is improved when the size is 25 μm or less.

The light-sensitive material according to the present invention can be subjected to development processing after exposure by various commonly used methods.

The developer contains a preservative (sulfite, metabisulfite) and, if necessary, an alkaline agent (sodium hydroxide, potassium hydroxide, etc.), a pH buffering agent (eg carbonate,
Phosphates, borates, boric acid, acetic acid, oxalic acid, alkanolamines, etc.), solubilizers (eg polyethylene glycols, their esters, alkanolamines, etc.), sensitizers (eg nonionics including polyoxyethylenes) Surfactants, quaternary ammonium compounds, etc., surfactants, antifoaming agents, antifoggants (for example, halides such as potassium bromide and sodium bromide, nitrobenzindazole, nitrobenzimidazole, benzotriazole, benzothiazole, Tetrazole, thiazole, etc.), chelating agent (eg ethylenediaminetetraacetic acid or its alkali metal salt, nitrilotriacetate, polyphosphate etc.), development accelerator (eg US Pat. No. 2,304,025, JP-B-47-45541)
Compounds described in No. 1), a hardener (for example, glutaraldehyde or a bisulfite adduct thereof, etc.), an antifoaming agent, or the like can be added. The pH of the developer is 9.5 to 10.5
Is preferably adjusted to

The developing solution may be a mixture of fixed components, an organic aqueous solution containing glycol or amine, or a viscous liquid having a high viscosity in a semi-kneaded state. Further, it may be diluted before use, or may be used as it is.

A water-soluble aluminum salt acting as a hardening agent, such as aluminum chloride, aluminum sulfate, and potassium alum, can be added to the fixing solution. If desired, preservatives (eg sulfite, bisulfite), pH
Compounds such as buffering agents (eg acetic acid), pH adjusting agents (eg sulfuric acid), chelating agents capable of softening water, etc. may be included.

In the development processing, the development temperature is 20 to 30 ° C.
It can be set to the normal temperature range of 30-40 ° C.
It can also be set within the range of high temperature treatment.

The black-and-white light-sensitive material according to the present invention is preferably processed by using an automatic processor. At that time, the processing is performed while replenishing a fixed amount of developing solution proportional to the area of the photosensitive material. The development replenishment amount is 1 in order to reduce the amount of waste liquid.
It is preferably 250 cc or less per m ² . Particularly preferably, it is 75 to 200 cc per m ² .

According to the present invention, the total processing time (Dry to Dry) from when the leading edge of the film is inserted into the automatic developing machine to when it comes out of the drying zone is 20 when the processing is performed by using the automatic developing machine. It is preferably 120 seconds. The total processing time referred to here includes all process times required for processing the black-and-white light-sensitive material, and specifically, for processing, for example, developing, fixing, bleaching, washing, stabilizing, drying, etc. It is the time that includes all the process time, that is, the time to Dry to Dry. More preferably, the total processing time (Dry to Dry) is 30-
60 seconds.

The halogen composition of the silver halide in the silver halide emulsion is not particularly limited, but silver chloride, silver chlorobromide, or silver chloroiodobromide is preferable. The average grain size of the silver halide is preferably 0.7 μm or less, particularly 0.5
˜0.1 μm is preferred. The shape of the silver halide grains is not limited, and may be any of tabular, spherical, cubic, tetradecahedral, regular octahedral and other shapes. Further, the grain size distribution is preferably narrow, and a so-called monodisperse emulsion in which 90%, preferably 95% of the total grain number falls within a grain size range of ± 40% of the average grain size is particularly preferable.

For details of the silver halide emulsion and its preparation method, see Research Disclosure (Resear).
ch Disclosure) 176, 17643, 22-23 (December 1978) or cited.

The light-sensitive material of the present invention may contain various compounds for the purpose of preventing fog during the production process of the light-sensitive material, storage during storage or photographic processing, or stabilizing photographic performance. The photographic emulsion and the non-photosensitive hydrophilic colloid may contain an inorganic or organic hardener.

The light-sensitive emulsion layer and / or the non-light-sensitive hydrophilic colloid layer have various known substances for various purposes such as coating aid, antistatic property, slipperiness improvement, emulsion dispersion, adhesion prevention and photographic property improvement. A surfactant may be used.

Gelatin is advantageously used as the binder or protective colloid of the photographic emulsion, but other hydrophilic colloids can also be used.

The light-sensitive material of the present invention may contain a dispersion of a water-insoluble or sparingly soluble synthetic polymer for the purpose of improving dimensional stability. For example, alkyl (meth) acrylate, alkoxyacryl (meth) acrylate, glycidyl (meth) acrylate, (meth) acrylamide,
Vinyl ester (eg vinyl acetate), acrylonitrile, olefin, styrene, etc., alone or in combination,
Alternatively, it is possible to use a polymer having a monomer component of a combination of these with acrylic acid, methacrylic acid, α, β-unsaturated dicarboxylic acid, hydroxyalkyl (meth) acrylate, sulfoalkyl (meth) acrylate, styrenesulfonic acid, or the like. it can.

Various other additives are used in the light-sensitive material of the present invention. For example, desensitizer, plasticizer, slip agent,
Development accelerator, oil, dye, etc.

Regarding these additives and the above-mentioned additives, specifically, those described in Research Disclosure No. 176 (supra), pages 22 to 31 can be used. In the light-sensitive material of the present invention, the photographic emulsion layer and other layers are coated on one side or both sides of a flexible support usually used for light-sensitive materials. Useful as the flexible support are films made of synthetic polymers such as cellulose acetate, cellulose acetate butyrate, polystyrene and polyethylene terephthalate.

[0070]

EXAMPLES The present invention will be specifically described below with reference to examples.

Example 1 (Preparation of silver halide emulsion A) A silver chloroiodobromide emulsion consisting of 70 mol% of silver chloride, 0.2 mol% of silver iodide and the rest of silver bromide was prepared by the simultaneous mixing method. . At the time of simultaneous mixing, K ₃ RhBr ₆ was added at 8.1 × 10 ^-8 mol per mol of silver. The resulting emulsion was a cubic, monodisperse grain with a mean grain size of 0.20 μm (variation coefficient 9
%) Emulsion. Then, the emulsion was desalted with a modified gelatin described in JP-A-2-280139 (a gelatin having an amino group substituted with phenylcarbamyl, for example, G-8 in JP-A-2-280139). EAg after desalting is 190mv at 50 ℃
Met. The emulsion thus obtained was adjusted to pH 5.58 and EAg123mv, and then the temperature was adjusted to 60 ° C. As shown in Table 1, reduction sensitizers A (thiourea dioxide) and B (sodium ascorbate) were added and stirred for 80 minutes. , Chemically aged. At the end of ripening, the following was added per mol of silver.

4-Hydroxy-6-methyl-1,3,3a, 7-tetrazaindene 7.5 × 10 ^-3 mol, 1-phenyl-5-mercaptotetrazole 3.5 × 10 ^-4 mol and gelatin 28.4 g An emulsion liquid was added.

(Preparation of Silver Halide Emulsion B) Halogenated emulsion except that the addition amount of K ₃ RhBr ₆ at the time of simultaneous mixing was 10.3 × 10 ^-8 mol per mol of silver and the average grain size of the emulsion was 0.15 μm A silver halide emulsion B was obtained in the same manner as the silver emulsion A.

(Preparation of silver halide photographic light-sensitive material) On the emulsion side of a polyethylene terephthalate film having a thickness of 100 μm described in Example 1 of JP-A-3-92175, the backing side was subjected to antistatic processing undercoating. , The silver halide emulsion layer 1 of Formula (1) in order from the support side, and the amount of gelatin was 1.5 g.
/ M ² , and the amount of silver is 2.5 g / m ^2, and the silver halide emulsion layer 2 of the formula (2) is coated thereon with a gelatin amount of 0.7.
g / m ² and silver amount of 1.0 g / m ^2, and an emulsion protective layer of the formula (3) is further applied thereon, so that the amount of gelatin is 1.0 g / m ^2.
And a backing layer of the formula (4) on the other undercoat layer on the other side, the amount of gelatin is 2.0 g.
/ M ² and further coated with a backing protective layer of the formula (5) so that the amount of gelatin is 1.0 g / m ² , and the sample Nos. 5 to 5 of the present invention and comparative samples are coated. Got 8.

On the other hand, as comparative samples, the above sample Nos. 5 to 8 were used.
The silver halide emulsion layer and only the emulsion layer 1, the amount of gelatin is 2.2 g / m ² of the emulsion layer 1, silver has created a sample No.1~4 which was set to be 3.50 g / m ² to.

Formulation 1 (composition of silver halide emulsion layer 1) Silver halide emulsion A or B Amount of silver 2.5 g / m ² Amount of gelatin 1.5 g / m ²

[0077]

[Chemical 15]

[0078]

[Chemical 16]

Formulation 2 (composition of silver halide emulsion layer 2) Same as Formulation 1 except for the following: Silver halide emulsion B or A amount of silver 1.0 g / m ² amount of gelatin 0.7 g / m ²

[0080]

[Chemical 17]

Formulation 3 (composition of emulsion protective layer) Gelatin 1.0 g / m ² S-1 12 mg / m ²

[0082]

[Chemical 18]

Matting agent: Monodisperse silica having an average particle size of 3.5 μm 22 mg / m ^2, 1,3-vinylsulfonyl-2-propanol 40 mg / m ² Formulation 4 (backing layer composition) Gelatin 2.7 g / m ² saponin 133 mg / m ² S-1 6mg / m ² Colloidal silica 100mg / m ²

[0084]

[Chemical 19]

Formulation 5 (Backing protective layer composition) Gelatin 1.0 g / m ² Matting agent: Monodisperse polymethylmethacrylate 50 mg / m ² glyoxal 5 mg / m ^{2 with an} average particle size of 5.0 μm

[0086]

[Chemical 20]

The obtained sample was passed through an optical wedge to obtain 48
After performing exposure at a high illuminance of 1 × 10 ^-5 sec equipped with an interference filter of 8 nm, an automatic processor for rapid processing (GR-26SR Konica Corp.) was used by using the developer and fixer of the following composition.
Manufactured) under the following conditions.

(Developer Formulation) Sodium sulfite 55 g / liter Potassium carbonate 40 g / liter Hydroquinone 24 g / liter 4-Methyl-4-hydroxymethyl-1-phenyl-3-hydrazolidone (Dimeson S) 0.9 g / liter Potassium bromide 5 g / L 5-methyl-benzotriazole 0.13 g / L 1-phenyl-5-mercaptotetrazole 0.02 g / L Boric acid 2.2 g / L Diethylene glycol 40 g / L Water and potassium hydroxide are added to make 1 L / pH 10.4.

(Fixing Solution Formulation) Ammonium thiosulfate (72.5% W / V aqueous solution) 240 ml Sodium sulfite 17 g Sodium acetate trihydrate 6.5 g Boric acid 6.0 g Sodium citrate dihydrate 2.0 g Pure water (ion exchange water) 17 ml Sulfuric acid (50% W / V aqueous solution) 4.7 g Aluminum sulphate (Al ₂ O ₃ converted content is 8.1% W / V aqueous solution) 21 g Water was made up to 1 liter and used. The pH of this fixer was adjusted to 4.8 with acetic acid.

(Development processing conditions) (Process) (Temperature) (Time) Development 35 ° C. 30 seconds Fixing 33 ° C. 20 seconds Washing at room temperature 20 seconds Drying 40 ° C. 40 seconds Total 110 seconds The photographic performance after processing was measured.

(Measurement Method of Sensitivity / Gamma) The obtained developed sample was measured with PDA-65 (Konica Digital Densitometer).
The sensitivities in the table are expressed as relative sensitivities when the sensitivity of Sample No. 1 at a concentration of 1.0 is 100. Also, gamma has a density of 1.0
Expressed with a tangent of 2.5.

(Exposure Latitude Measuring Method) Each sample was subjected to FM screening by using an output device R3030 (Ar laser) manufactured by Rhinotype Hel to theoretically give 50% halftone dots at a resolution of 1270 dpi. Exposure was performed while changing the exposure amount, and processing was performed under the above-mentioned development conditions.

The obtained halftone dots were measured using X-Rite 361T (manufactured by X-Rite), and the exposure amount giving 50% was ± 12.5%.
The percentage of halftone dots in the exposure amount was calculated and the difference between the two was taken as the exposure latitude value. The smaller this value is, the wider the exposure latitude is.

The above results are shown in Table 1.

[0095]

[Table 1]

As is clear from the table, it is understood that the exposure latitude is improved in the constitution in which the emulsion layer having low sensitivity is provided on the upper layer side.

Example 2 A sample was prepared in the same manner as in Example 1 except that the following solid disperse dye having absorption at 488 nm light was added to the formulation 2.
Nos. 9 to 14 are prepared and evaluation results are shown in Table 2.

[0098]

[Chemical 21]

[0099]

[Table 2]

In comparison with Example 1, it can be seen that the constitution in which the dye is added to the upper layer to relatively lower the sensitivity gives an excellent exposure latitude.

[0101]

According to the present invention, it is possible to obtain a silver halide photographic light-sensitive material which is excellent in exposure latitude even if a halftone dot image having a small diameter is formed by laser exposure, that is, a small change ratio of halftone dot area with respect to a change in exposure amount. You can

Claims (3)

[Claims] 1. A first photosensitive silver halide emulsion layer spectrally sensitized to 440 to 500 nm on a support and spectrally sensitized to 440 to 500 nm at a lower sensitivity than the first photosensitive silver halide emulsion. A silver halide photographic light-sensitive material having a second silver halide emulsion layer in this order and containing a hydrazine compound. 2. A silver halide photographic light-sensitive material according to claim 1, which contains a nucleation accelerator. 3. The silver halide photographic light-sensitive material according to claim 1, which is a scanner film for laser exposure.