JPH06230518A - Silver halide photographic sensitive material - Google Patents

Abstract

PURPOSE:To provide a silver halide photographic sensitive material capable of saving time and labor for preparing 2 kinds of films, lowering the cost, widely enhancing operation efficiency, and having a high spread and choke performance by enhancing the spread and choke performance of a contact film (reduction of exposure time in particular) and making contact work with a single film. CONSTITUTION:The silver halide photographic sensitive material having at least one photosensitive silver halide emulsion layer and at least one of nonphotosensitive hydrophilic colloidal layer on a support is characterized by containing at least one of polymer latices stabilized with a gelatin in both layers, and a dye having a light absorption substantially at least in 400-450nm, in at least one layer, and having an absorbance of >=0.7, and containing silver halide grains having a grain diameter of <=0.2mum and a gamma value of >=7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silver halide photographic light-sensitive material, and more particularly to a silver halide photographic light-sensitive material having an improved thickening performance.

[0002]

2. Description of the Related Art In recent years, in order to save labor, rationalize and improve the working environment in the field of printing and plate making, it is possible to perform film making, which is conventionally performed in a dark room, especially so-called reversing process work in a bright room. Is required, and devices such as printers and photosensitive materials have been improved.

Examples of the light-sensitive material for a bright room include light-sensitive materials having a spectral sensitivity to a light source rich in ultraviolet rays, for example, an ultrahigh pressure mercury lamp, a mercury lamp, a metal halide lamp, a xenon lamp, a halogen lamp and the like.

These photosensitive materials can be handled under a general fluorescent lamp or a dedicated fluorescent lamp with a small amount of ultraviolet rays. However, it is known that the conventional light-sensitive material for a bright room is inferior to the light-sensitive material for a dark room in the following performance. That is, when a halftone dot as a return document is exposed, the rate of increase of the halftone dot area with respect to an increase in the exposure amount (called the halftone dot thickening performance) is low, and the halftone dot area is increased to the required halftone dot area. Then, it takes a long time to expose and there is a drawback that workability is poor.

Therefore, when a thickening operation is performed using a general-purpose return film that has been conventionally used, the time required for thickening is several times to several tens of times longer than the time required for general return exposure. Needed Therefore, a dedicated high-sensitivity and high-γ photosensitive material has been prepared for thickening.

Therefore, at present, there are the following two methods for performing the thickening work. A thickening-dedicated film is used; in this case, the time required for thickening can be shortened, but it is properly used as a general-use film. This is not preferable because the work becomes complicated.

A general-purpose film is used; in this case, the general-purpose film alone is simple and convenient, but the time required for thickening is long, which is not preferable.

As described above, both the above-mentioned conventional methods are inferior in terms of work efficiency and cost reduction, and improvement thereof has been desired.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to improve the thickening performance of a general return film (especially to shorten the exposure time) so that the return operation can be performed with a single film. This saves the user the trouble of preparing two types of films and can reduce the cost.
Another object of the present invention is to provide a silver halide photographic light-sensitive material having a high thickening performance, which can be expected to be greatly improved in terms of work efficiency.

[0010]

The objects of the present invention are as follows.
Achieved by or.

In a silver halide photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer on a support, the silver halide emulsion layer and the non-light-sensitive hydrophilic colloid layer. Which contains at least one gelatin-stabilized polymer latex, and wherein at least one layer in the silver halide photographic light-sensitive material comprises
At least containing a dye having a light absorption between 400 ~ 450nm, the absorbance of the silver halide photographic light-sensitive material at 450nm is 0.7 or more, the particle size of the silver halide grains contained is 0.2μm or less. And a γ value of 7 or more, a silver halide photographic light-sensitive material.

The silver halide photographic light-sensitive material as described above, wherein the amount of gelatin on the emulsion side is 2.7 g / m ² or less.

Further, as a preferred embodiment of the present invention, in a silver halide photographic light-sensitive material having at least one light-sensitive silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer on a support, the silver halide is The emulsion layer and the non-photosensitive hydrophilic colloid layer contain at least one polymer latex stabilized with gelatin, and at least one layer in the silver halide photographic light-sensitive material is represented by the following general formula [1]. The silver halide photographic light-sensitive material contains at least one dye represented by the following formula: the absorbance at 450 nm of the silver halide photographic material is 0.7 or more, the grain size of silver halide grains contained is 0.2 μm or less, and the γ value is 7 The above is a silver halide photographic light-sensitive material characterized by the above.

[0014]

[Chemical 1]

[Wherein R ₁ represents a group selected from a carboxyl group, an alkyl group, an aryl group, an alkoxycarbonyl group and an aryloxycarbonyl group, and R ₂ represents an alkyl group substituted with a sulfonic acid group or a carboxyl group, or Represents a group selected from an aryl group substituted with a sulfonic acid group or a carboxyl group, and R ₃ and R ₄ are
It represents a group or atom selected from a hydrogen atom and a substituted or unsubstituted alkyl group. ] The silver halide photographic light-sensitive material as described above, wherein the amount of gelatin on the emulsion side is 2.7 g / m ² or less.

Further, 1) the absorbance at 450 nm is 0.8 or more (however, on the emulsion side), 2) the grain size of silver halide is 0.15 or less, and / or 3) the γ of the light-sensitive material is particularly preferably 7 or more.

The present invention has found that increasing the amount of dye used, grain size of silver halide of 0.2 μm or less, and reducing the amount of gelatin are particularly effective for improving thickening performance.

The present invention will be described in more detail below.

First, the polymer latex contained in the photosensitive silver halide emulsion layer and the non-photosensitive hydrophilic colloid layer in the present invention will be described.

Usually, the latex is dispersed in water by a surfactant, but the latex which can be used in the present invention is characterized in that the surface and / or the inside of the polymer latex is dispersed and stabilized by gelatin. . The polymer constituting the latex and gelatin may have some kind of bond. In this case, the polymer and gelatin may be bound directly or may be bound via a crosslinking agent. Therefore, the monomers constituting the latex include carboxyl group, amino group, amide group,
Epoxy group, hydroxyl group, aldehyde group, oxazoline group,
It is desirable to include those having a reactive group such as an ether group, an ester group, a methylol group, a cyano group, an acetyl group and an unsaturated carbon bond. When a cross-linking agent is used, it is possible to use one that has been used as a usual cross-linking agent for gelatin. For example, aldehyde type, glycol type, triazine type, epoxy type, vinyl sulfone type,
Crosslinking agents such as oxazoline-based, methacrylic-based, and acrylic-based crosslinking agents can be used.

The latex of the present invention can be obtained by adding a gelatin solution to the reaction system and reacting it after the polymerization reaction of the polymer latex is completed. Although the polymer latex synthesized in the surfactant may be reacted with gelatin using a crosslinking agent, the presence of gelatin during the polymerization reaction of the polymer gives particularly preferable results. Further, in this case, it is more preferable not to use a surfactant during the polymerization reaction of the polymer.

The present inventor has found that in the course of continuing the examination of the above problems, there is a specific boundary in the ratio of the added amounts of gelatin and latex.

The effect of the present invention becomes remarkable when the amount of latex added is 70% or more with respect to gelatin, particularly preferably 70% to 200%. Up to now, when such a large amount of latex is added, a normal latex forms a film, but by using the latex of the present invention, its effect could be clarified. The latex amount at this time is preferably 50 to 5 mg / m ² , and more preferably 100 to
It is 2.5 mg / m ² .

The polymer latex contained in the photographic material of the present invention is, for example, US Pat. No. 2,772,16.
No. 6, No. 3,325,286, No. 3,411,911, No. 3,311,912
, 3,525,620, Research Disclosure No. 195 19551 (July 1980)
And the like, hydrates of vinyl polymers such as acrylic acid esters, methacrylic acid esters, and styrene.

The polymer latex preferably used in the present invention is a homopolymer of a metaalkyl acrylate such as methyl methacrylate or ethyl methacrylate, a homopolymer of styrene, or a metaalkyl acrylate, styrene and acrylic acid, N-methylol acrylamide, Copolymers with glycidol methacrylate, etc., homopolymers of alkyl acrylates such as methyl acrylate, ethyl acrylate, butyl acrylate, etc. or copolymers of alkyl acrylate with acrylic acid, N-methylol acrylamide, etc. Polymerization component is up to 30% by weight), butadiene homopolymer or copolymer of butadiene and one or more of styrene, butoxymethyl acrylamide, acrylic acid, vinylidene chloride-methyl acetic acid. Examples thereof include relate-acrylic acid terpolymer.

As gelatin used for stabilizing the latex of the present invention, gelatin and gelatin derivatives, cellulose derivatives, graft polymers of gelatin and other polymers,
Other hydrophilic colloids such as proteins, sugar derivatives, cellulose derivatives, and synthetic hydrophilic polymer substances such as single or copolymers can also be used in combination.

Examples of gelatin include lime-processed gelatin, acid-processed gelatin, and Bulletin of Society of Japan (Bull.Soc.Sci.Phot.Japan) No. 16, pages 30 (196)
You may use the acid-processed gelatin as described in 6),
Also, a hydrolyzate or an enzymatic hydrolyzate of gelatin can be used. Examples of the gelatin derivative include various compounds such as acid halides, acid anhydrides, isocyanates, bromoacetic acid, alkanesultones, vinyl sulfonamides, maleinimide compounds, polyalkyleonoxides, and epoxy compounds in gelatin. What is obtained by reacting is used. Specific examples thereof are U.S. Patents 2,614,928 and 3,132,9.
45, 3,186,846, 3,312,553, British Patent 861,41
No. 4, No. 1,033,189, No. 1,005,784, Japanese Patent Publication No. 42-26845
No. etc.

The proteins include albumin, casein,
As the cellulose derivative, hydroxyethyl cellulose, carboxymethyl cellulose, a sulfuric acid ester of cellulose, or as the sugar derivative, sodium alginate or a starch derivative may be used in combination with gelatin.

As a graft polymer of the above-mentioned gelatin and other polymers, gelatin is mixed with acrylic acid, methacrylic acid,
Those obtained by grafting derivatives thereof such as esters and amides, and homopolymers or copolymers of vinyl monomers such as acrylonitrile and styrene can be used. In particular, a graft polymer with a polymer having a certain degree of compatibility with gelatin, for example, a polymer such as acrylic acid, acrylamide, methacrylamide, or hydroxyalkyl methacrylate is preferable. Examples of these are described in US Pat. Nos. 2,763,625, 2,831,767, and 2,956,884.

The latex used in the present invention must be added to at least one non-photosensitive hydrophilic colloid layer. It may be added in other optional layers (a plurality of non-photosensitive hydrophilic colloid layers and / or photosensitive hydrophilic colloid layers). It may be contained on only one side of the support, or may be contained on both sides. A conventionally known latex may be added to the layer. When included on both sides of the support, the type and / or amount of polymer latex included on each side may be the same or different.

The average particle size of the polymer latex used in the present invention is preferably 0.005 to 1 μm, and particularly preferably 0.02 to 0.5 μm.

Next, some specific examples of the latex that can be used in the present invention will be shown. The specific examples of the latex shown in the present specification also represent a latex having any composition ratio of the latex composed of the constituent components. Of course, the specific examples of the latex shown here are typical examples of the latex that can be used, and it goes without saying that the constituent components (not only the composition ratio) of the latex used in the present invention are not limited to these specific examples. Yes.

[0033]

[Chemical 2]

[0034]

[Chemical 3]

[0035]

[Chemical 4]

[0036]

[Chemical 5]

[0037]

[Chemical 6]

[0038]

[Chemical 7]

[0039]

[Chemical 8]

Next, the water-soluble dye having a maximum absorption wavelength in the range of 400 to 450 nm in the silver halide emulsion layer and / or the non-photosensitive hydrophilic colloid layer of the present invention will be described.

The dye according to the present invention has a maximum absorption of 400 to 500.
Any dye can be used as long as it is in the range of nm, but the dye represented by the following general formula [1] preferably exhibits the desired effects of the present invention.

[0042]

[Chemical 9]

In the general formula [1], R ₁ is a carboxyl group,
Alkyl group (preferably having 1 to 3 carbon atoms), substituted alkyl group (preferably having 1 to 3 carbon atoms, preferable substituents are halogen atom, hydroxy group, etc.), aryl group (preferably phenyl group), alkoxycarbonyl group (alkyl The moiety preferably represents a group selected from a carbon number of 1 to 3) and an aryloxycarbonyl group (preferably a phenyloxycarbonyl group), and R ₂ is an alkyl group (preferably having a carbon number) substituted with a sulfonic acid group or a carboxyl group. 1 to
3) and a group selected from an aryl group (preferably a phenyl group) substituted with a sulfonic acid group or a carboxyl group, R ₃ and R ₄ are a hydrogen atom, an alkyl group (preferably having 1 to 3 carbon atoms) and It represents a group or atom selected from a substituted alkyl group (preferably having 1 to 3 carbon atoms, a preferable substituent is a halogen atom, a hydroxyl group, etc.).

Synthesis of these dyes is carried out, for example, in Japanese Examined Patent Publication No. 31-1.
It can be synthesized by the method described in No. 0578.

Specific examples of the dye represented by the general formula [1] are shown below, but the invention is not limited thereto.

[0046]

[Chemical 10]

[0047]

[Chemical 11]

These dyes are, in addition to the usual water-soluble dyes,
The solid-dispersed dye may be contained in the hydrophilic colloid layer.

The amount of the above-mentioned dye used is not uniform depending on the kind of the compound, etc., but it is preferable that the dye is contained so that the absorbance at 450 nm is 0.75 or more, particularly preferably 0.8 or more.

Further, the above dye is dissolved in water or a hydrophilic organic solvent such as methanol or ethanol and added. The addition step may be optional, but when it is added to the silver halide emulsion layer, it is preferably added after the completion of chemical ripening or immediately before coating. There is no particular limitation on a general additive according to the present invention, a known contrast increasing agent, a method for producing silver halide grains, a sensitizing method, and the like, for example, JP-A 1-2300.
You can refer to No. 35, Japanese Patent Application No. 1-266640, etc.

In the present invention, one or more antistatic layers may be provided on the backing side and / or emulsion layer side of the support for the purpose of antistatic property which is another physical property as a light-sensitive material.

In this case, the surface specific resistance on the side provided with the antistatic layer is preferably 1.0 × 10 ¹² Ω or less, particularly preferably 8 × 10 ¹¹ Ω or less at 25 ° C. and 50%.

The antistatic layer is preferably an antistatic layer containing a water-soluble conductive polymer, hydrophobic polymer particles and a reaction product of a curing agent, or an antistatic layer containing a metal oxide.

Examples of the water-soluble conductive polymer include polymers having at least one conductive group selected from a sulfonic acid group, a sulfuric acid ester group, a quaternary ammonium salt, a tertiary ammonium salt, and a carboxyl group polyethylene oxide group. . Of these groups, a sulfonic acid group, a sulfuric acid ester group and a quaternary ammonium salt group are preferred. The conductive group needs to be 5% by weight or more per molecule of the water-soluble conductive polymer.

Further, the water-soluble conductive polymer contains a carboxyl group, a hydroxy group, an amino group, an epoxy group, an aziridine group, an active methylene group, a sulfinic acid group, an aldehyde group, a vinyl sulfone group and the like. Of these, a carboxyl group, a hydroxy group, an amino group, an epoxy group, an aziridine group, and an aldehyde group are preferably contained. 5% by weight of these groups per polymer molecule
The above must be included. The number average molecular weight of the water-soluble conductive polymer is 3,000 to 100,000, preferably 3500 to 50,000.

Further, as the above-mentioned metal oxide, tin oxide, indium oxide, antimony oxide, zinc oxide, or those obtained by doping these metal oxides with metal phosphorus or metal indium is preferably used. The average particle size of these metal oxides is preferably 1 μ to 0.01 μ.

Although a matting agent is preferably used, any known matting agent can be used in the present invention. For example Swiss patent 330,15
Silica described in No. 8, glass powder described in French Patent 1,296,995, inorganic particles such as alkaline earth metal described in British Patent No. 1,173,181 or cadmium, carbonate such as zinc, etc .;
Starch described in US Pat. No. 2,322,037, Belgian patent 625,4
51 or starch derivative described in British Patent No. 981,198, polyvinyl alcohol described in Japanese Patent Publication No.
Organic particles such as polystyrene or polymethylmethacrylate described in Swiss Patent 330,158, polyacrylonitrile described in US Pat. No. 3,079,257, and polycarbonate described in US Pat. No. 3,022,169 may be included. These matting agents may be used alone or in combination. The shape of the matting agent is preferably spherical as a regular matting agent, but may be other shapes such as flat plate and cubic. The size of the matting agent is represented by the diameter when the volume of the matting agent is converted into a spherical shape. In the present invention, the matte particle size refers to the spherically converted diameter.

In a preferred embodiment of the present invention, the outermost layer on the emulsion surface side preferably contains 4 to 80 mg / m ² of at least one fixed and / or irregular matting agent having a matting particle size of 4 μm or more. . More preferably, 4 mg of at least one fixed and / or irregular matting agent having a particle size of less than 4 μm is used.
/ m is ² to 80 mg / m ² combined contain it.

The fact that the matting agent is contained in the outermost layer means that
At least one part of the matting agent is preferably contained in the outermost layer, and one part of the matting agent may reach a layer below the outermost layer.

In order to fulfill the basic function of the matting agent,
It is desirable that a part of the matting agent is exposed on the surface.
Further, the matting agent exposed on the surface may be a part of the added matting agent or all. The method of adding the matting agent is
It may be a method of dispersing in a coating liquid in advance and coating, or a method of spraying a matting agent after coating the coating liquid and before completion of drying. When adding a plurality of different matting agents, both methods may be used in combination. Manufacturing techniques for more effectively adding these matting agents to the light-sensitive material are described in Japanese Patent Application No. 1-228762.

As the undercoat layer which can be used in the present invention, an undercoat layer containing an organic solvent containing polyhydroxybenzenes described in JP-A-49-3972, JP-A-49-11118.
No. 52, No. 52-104913, No. 59-19941, No. 59-19940, No. 5
9-18945, 51-112326, 51-117617, 51-5846
No. 9, 51-114120, 51-121323, 51-123139,
51-114121, 52-139320, 52-65422, 52-1
09923, 52-119919, 55-65949, 57-128332
No. 59-19941 and other aqueous latex undercoating layer, but also U.S. Pat.
No. 425421, No. 4645731, vinylidene chloride-based undercoating and the like.

The surface of the undercoat layer can be chemically or physically treated. Examples of the treatment include chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet treatment, high frequency treatment, glow discharge treatment, active plasma treatment, laser treatment, mixed acid treatment, and surface activation treatment such as ozone oxidation treatment. .

The undercoat layer is distinguished from the coating layer according to the present invention, and there is no limitation on the coating timing or conditions.

However, the embodiments of the present invention exhibit a more remarkable effect when coated on a polyester support provided with a vinylidene chloride subbing.

In the present invention, in addition to the usual water-soluble dye, a solid-dispersed dye may be contained in any of the hydrophilic colloid layers. The layer may be the outermost layer on the emulsion surface side, or may be added below the emulsion layer and / or on the backing surface side for the purpose of preventing halation. Further, an appropriate amount may be added to the emulsion layer for adjusting the irradiation. Of course, plural kinds of solid disperse dyes may be contained in plural layers.

The addition amount of the solid disperse dye is preferably 5 mg / m ^{2 to 1} g / m ² , and particularly preferably 10 mg / m ^{2 to 1} g / m ^2.
a ^{mg / m 2 ~800mg / m 2} .

The fine particles of the solid dispersion used are obtained by pulverizing the dye with a dispersing machine such as a ball mill or a sand mill, and then water or a hydrophilic colloid such as gelatin, sodium dodecylbenzenesulfonate, sodium fluorinated octylbenzenesulfonate. , Saponin, nonylphenoxy polyethylene glycol and the like can be dispersed and obtained.

Examples of the general formula of the dye used in the present invention include those described in US Pat. No. 4,857,446, and for example, those represented by the general formulas [I] to [V] are preferably used.

The present invention can be applied to various photosensitive materials for printing, X-ray, general negative, general reversal, general positive, direct positive, etc., but requires extremely high dimensional stability. When it is applied to a photosensitive material for printing, a particularly remarkable effect is obtained.

The development temperature of the silver halide photographic light-sensitive material according to the present invention is preferably 50 ° C. or lower, more preferably around 25 ° C. to 40 ° C., and the development processing time is generally completed within 2 minutes. However, more preferable results can be obtained by performing rapid processing for 5 to 60 seconds.

[0071]

EXAMPLES Examples of the present invention will be specifically shown below, but it goes without saying that the present invention is not limited to these examples.

Synthesis of Latex Lx-1 A solution prepared by adding 1.0 kg of gelatin, 0.01 kg of sodium dodecylbenzenesulfonate and 0.05 kg of ammonium persulfate to 60 l of water was stirred at a liquid temperature of 60 ° C. under a nitrogen atmosphere (a). Styrene 3.0 kg, (a) methyl methacrylate 3.0
Mixture of Kg and 3.2 kg of (u) ethyl acrylate and 2
-Add 0.8 kg of sodium salt of acrylamido-2-methylpropanesulfonic acid over 1 hour, then stir for 1.5 hours and steam-distill for 1 hour to remove residual monomer.
Add 0.5 kg of gelatin and add 1.5% of the following preservative (a)
After adding g, the mixture was cooled to room temperature, and then the pH was adjusted to 6.0 with ammonia. The latex solution obtained is 75 with water.
Finished to Kg. As described above, a monodisperse latex having an average particle size of 0.1 μm was obtained.

[0073]

[Chemical 12]

Synthesis of Latex Lx-2 (for comparison) KMDS (made by Meito Sangyo Co., Ltd., dextran sulfate sodium salt) (0.25 kg) and ammonium persulfate (0.05 kg) were added to 40 l of water at a liquid temperature of 80 ° C. (A) n-butyl acrylate 4.51 Kg under nitrogen atmosphere while stirring with
(A) Add a mixed solution of 5.49 kg of styrene and 0.1 kg of (c) acrylic acid over 1 hour, then stir for 1.5 hours, add 0.005 kg of ammonium persulfate and stir for 1.5 hours, and steam distillation for 1 hour after the reaction is completed. To remove residual monomer, cool to room temperature and adjust the pH with ammonia.
Adjusted to 6.0. The obtained latex liquid was adjusted to 50.5 Kg with water.

As described above, the average particle size is 0.25 μm and Tg is
A monodisperse latex at about 0 ° C. was obtained.

(Emulsion preparation) A silver sulfate solution and an aqueous solution of sodium chloride and potassium bromide were mixed with 8 × rhodium hexachloride complex.
The solution added to 10 ^-5 mol / Agmol was simultaneously added to the gelatin solution while controlling the flow rate.
A cubic crystal, monodisperse, silver chlorobromide emulsion containing μ, 1 mol% of silver bromide was obtained.

This emulsion was subjected to sulfur sensitization by a conventional method, 6-methyl-4-hydroxy-1,3,3a, 7-tetrazaindene was added as a stabilizer, and then the following additives were added to coat the emulsion. Liquid E
-1 to 14 were prepared, and then emulsion protective layer coating solution P-0, backing layer coating solution B-0, backing protective layer coating solution BP-0.
Was prepared with the following composition.

(Preparation of Emulsion Coating Solution) Compound (a) 1 mg / m ² NaOH (0.5N) Adjusted to pH 5.6 Compound (b) Listed in Table 1 Compound (c) 30 mg / m ² saponin (20%) 0.5 cc / m ² sodium dodecylbenzenesulfonate 20 mg / m ² 5-methylbenzotriazole 10 mg / m ² compound (d) 2 mg / m ² compound (e) 10 mg compound (f) 6 mg / m ² latex Lx-1 0.5 g / m ² Styrene-maleic acid copolymer polymer (thickener) 90 mg / m ²

[0079]

[Chemical 13]

[0080]

[Chemical 14]

[0081]

[Table 1]

(Emulsion Protective Layer Coating Solution P-0) Gelatin 0.5 g / m ² compound (g) (1%) 25 cc / m ² compound (h) Spherical monodisperse silica (8 μm) 20 mg / m ² 〃 (3 [mu] m) 10 mg / m ² compound (i) 100 mg / m ² adjusted latex Lx-1 0.5g / m ² (backing layer coating solution B-0) citrate pH6.0 gelatin 1.0 g / m ² compound ( j) 100 mg / m ² compound (k) 18 mg / m ² compound (l) 100 mg / m ² savonine (20%) 0.6 cc / m ² latex (m) 300 mg / m ² 5-nitroindazole 20 mg / m ² styrene- Maleic acid copolymer polymer (thickener) 45 mg / m ² glyoxal 4 mg / m ² compound (o) 100 mg / m ² (backing protective layer coating liquid BP-0) gelatin 0.5 g / m ² compound (g) (1 %) 2cc / m ² spherical polymethylmethacrylate (4μ) 25mg / m ² sodium chloride 70 mg / m ² glyoxal 22 mg / m ² compound ( ) 10mg / ^{m 2}

[0083]

[Chemical 15]

[0084]

[Chemical 16]

[0085]

[Chemical 17]

[0086]

[Table 2]

(Preparation of photographic light-sensitive material) JP-A-59-19
No. 941 on a polyethylene terephthalate film support having a thickness of 100 μm and having a thickness of 50 W / m ² · mi.
After performing corona discharge at n, an antistatic layer was applied on the backing layer side by using a roll-fit coating pan and an air knife so as to have the following composition. The drying was performed at 90 ° C. for 2 minutes and then at 140 ° C. for 9 seconds. The layer thickness after drying was 1 μm, and the surface resistivity was 1 × 10 ⁸ Ω at 23 ° C. and 55% humidity.

[0088]

[Chemical 18]

Then, on the emulsion surface side, a silver halide emulsion layer,
Simultaneous multilayer coating was performed by adding a hardening agent solution containing formaldehyde and di (vinylsulfonylmethyl) ether by a slide hopper method in the order of the protective layer, and passed through a cold air set zone.

Next, a backing layer was applied to the backing layer side by the slide hopper method while adding the above-mentioned hardener solution, and set in cold air. Further, both sides were simultaneously dried in the drying zone under the following drying conditions. The coating speed is 100m
/ Min, and the conveyance after coating the backing layer was performed in a non-contact state until the winding after drying.

(Drying conditions) After setting, the product was dried with a drying air of 30 ° C. for 50 seconds until the weight ratio of water / gelatin reached 800%,
35 with dry air at 35 ° C and 30% relative humidity until it reaches 200%
Dry for 2 seconds, blow for 5 seconds, surface temperature 34 ℃
30 seconds after the point when the temperature reaches (which is regarded as the end of drying), 48 ° C
-Dried for 1 minute in air with 16% relative humidity.

This photosensitive material was wound up at 23 ° C. and 55% relative humidity, cut, and cut into a barrier bag which was conditioned for 3 hours in the same environment.
The humidity was adjusted in advance at 40 ° C. and relative humidity of 10% for 8 hours, and then the humidity was adjusted at 23 ° C. and relative humidity of 55% for 2 hours and sealed with cardboard placed.

The coated silver amount of the light-sensitive material after drying was 3.2 g / m ² ,
The amount of gelatin in the silver halide emulsion layer is 1.2 g / m ² , the amount of gelatin in the protective layer is 1.1 g / m ² , and the amount of gelatin in the backing layer is 2 g.
It was / m ² .

The sample thus obtained was exposed by a usual method and treated with a developing solution and a fixing solution shown below. The evaluation was performed as follows.

[Developer formulation] (Composition A) Pure water (ion-exchanged water) 150 ml Ethylenediaminetetraacetic acid disodium salt 2 g Diethylene glycol 50 g Potassium sulfite (55% W / V aqueous solution) 100 ml Potassium carbonate 50 g Hydroquinone 15 g 5-Methylbenzotriazole 200 mg 1-Phenyl-5-mercaptotetrazole 30 mg Potassium hydroxide Amount to adjust the pH of the solution to 10.4 Potassium bromide 4.5 g (Composition B) Pure water (ion exchanged water) 3 ml Diethylene glycol 50 g Ethylenediaminetetraacetic acid disodium salt 25 mg Acetic acid ( 90% aqueous solution) 0.3 ml 5-nitroindazole 110 mg When the developer was used, the above composition A and composition B were dissolved in 500 ml of water in this order, and the solution was made up to 1000 ml.

[Fixer Formulation] [A agent] Ammonium thiosulfate (100% conversion) 168.2g Pure water 5.0g Sodium sulfite 5.63g Boric acid 9.78g Sodium citrate dihydrate 2.0g Sodium acetate trihydrate 27.8 pure water g acetic acid (90W / W%) 6.4g [ B agent] (8.1W / W% in Al ₂ O ₃₎ of aluminum sulfate solution 25.31g deionized water 2.82g sulfate (50W / W%) 6.74g the above a agent After adding about 800 cc, add agent B to make 1 liter.

The pH of the fixer after completion was about 4.38.

[Development processing conditions] (Process) (Temperature) (Time) Current image 38 ° C 20 seconds Settlement 28 ° C 20 seconds Water wash Normal temperature 20 seconds Dry 40 ° C 20 seconds <Exposure method> Figure 1 An electrodeless discharge tube light source manufactured by FUSION in the United States having the spectrum shown in Fig. 2 is mounted under the glass plate, and the original and the photosensitivity are evaluated on the glass surface so that the quality of the sticking marks and blank characters shown in Fig. 2 can be evaluated. The material was overexposed.

<Photographic Performance Evaluation Method> (1) Thickening Property <Evaluation Method> Two sheets of diffusion paper are sandwiched between a line drawing original having a line width of 500 μm, and a raw film is placed on the paper for exposure. At this time, the relative value of the reciprocal of the exposure count when the line width of the thickened line drawing original becomes 700 μm is defined as the thickening sensitivity (N
O.17 is shown as a relative value with 100).

(2) Blank Character Quality The blank character quality is appropriate so that the portion having a halftone dot area of the halftone dot film 2 in FIG. When exposed, it means the image quality with which the line width of 50 μm on the line drawing film 4 in FIG. 2 is reproduced.
The very good extracted character image quality was set to "5", and the worst level was set to "1", and was evaluated in five levels.

(3) Sensitivity (Actual Burning Sensitivity) When exposure is performed so that the portion having a halftone dot area of the halftone dot film 2 in FIG. The relative value of the reciprocal of the exposure count of the printer was used as the film sensitivity (shown as a relative value with No. 17 set to 100).

The results are shown in Table 3.

[0103]

[Table 3]

From the effect shown in Table 3, it can be seen that the samples of the present invention are excellent in thickening performance and quality of blank characters.

[0105]

According to the present invention, by improving the thickening performance of a general return film (especially, shortening the exposure time), it is possible to perform a return operation with a single film. To provide a silver halide photographic light-sensitive material having a high thickening property, which saves the labor of preparing a film, can reduce the cost, and can be expected to greatly improve the work efficiency. can do.

[Brief description of drawings]

FIG. 1 is a diagram showing a spectrum of a light source.

FIG. 2 shows a positional relationship between a blank character, a document at the time of returning work, and a photosensitive material.

FIG. 3 is an explanatory view of an automatic developing machine.

[Explanation of reference numerals] 1 Photosensitive material for return 2 Halftone image film 3,5 Laminating base 4 Film for positive image of line drawing 6 Cut mask film 11 Inserting table 12 Detection-developing cross rack 13 Development rack 14 Development-fixing cross rack 15 Fixing rack 16 Fixing-washing rack 17 Washing rack 18 Squeeze rack 19 Drying guide 20 Guide 21 Drying exit rack 22 Film basket

Claims (2)

[Claims] 1. A silver halide photographic light-sensitive material having at least one photosensitive silver halide emulsion layer and a non-photosensitive hydrophilic colloid layer on a support, the silver halide emulsion layer and the non-photosensitive hydrophilic layer. The colloidal layer contains at least one polymer latex stabilized with gelatin, and at least one layer in the silver halide photographic light-sensitive material comprises:
At least containing a dye having a light absorption between 400 ~ 450nm, the absorbance of the silver halide photographic light-sensitive material at 450nm is 0.7 or more, the particle size of the silver halide grains contained is 0.2μm or less. And a γ value of 7 or more, a silver halide photographic light-sensitive material. 2. The silver halide photographic light-sensitive material according to claim 1, wherein the amount of gelatin on the emulsion side is 2.7 g / m ² or less.