JPS60170842A - Direct positive silver halide photosensitive material - Google Patents

Abstract

PURPOSE:To provide wide exposure latitude, high contrast, and superior safelight allowance by incorporating fogged silver halide, and a dye having absorption in the spectral region to which said silver halide has the highest sensitivity, and the max. absorption in the region shorter in wavelength than this region. CONSTITUTION:A dye contained in a direct positive silver halide (AgX) photosensitive material has absorption in the spectral region to which fogged AgX contained in said photosensitive material has the max. sensitivity, and the dye has the max. absorption in the range shorter in wavelength than said region. As such a direct positive photosensitive material, silver chlorobromide or bromide is preferable, and to fog such AgX, conventional processes may be used, and thioureadioxide, etc. are, preferably, used. Sensitivity can be enhanced by incorporating an optical sensitizing dye, such as dimethinetrimethinecyanine dye, etc.. The fogged direct positive silver halide photosensitive material contg. such a dye has high contrast, superior safelight allowance, and wide exposure latitude.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to direct positive halogenated ε1 (photographic light-sensitive materials) containing silver halide grains which have been chemically fogged in advance; Also, it has good safelight properties and high contrast f (inscribed positive silver halide photograph e, relating to the original material).

(Prior art not t;me conversion "F" R+-i M/) ',' r,,
Did you become a tff? 1. Direct positive silver-densified photographic materials containing grains have been put into practical use because of their advantage in that positive images can be obtained directly and easily through one development process. Improvements have also been made.

However, when a dye or the like is added to the above-mentioned direct positive silver halide photographic light-sensitive materials to widen the exposure latitude, the gradation of the image tends to become softer, and furthermore, safelight properties are also adversely affected. It has the disadvantage of giving away. Regarding the addition of dyes to such direct positive silver halide photographic materials, for example, Japanese Patent Application Laid-Open No. 55-16
There is a description of this in Publication No. 1235, etc.

(Object of the Invention) An object of the present invention is to provide a high-contrast, direct-positive silver halide photographic light-sensitive material that has a wide base latitude and excellent safelight properties.

(Structure of the Invention) The object of the present invention is to provide a direct-bodied halogen containing fogged silver halide grains, in which the silver halide grains have the highest A direct-formed silver halide photographic photosensitive material containing a dye that has absorption in the spectral region showing sensitivity (2 in the intrinsic sensitivity of silver halide) and has an absorption maximum on the shorter wavelength side than the spectral region of highest sensitivity. This can be achieved by

The invention will now be described in more detail.

The dye used in the present invention is preferably a compound represented by the following general formulas [I] to [V].

General formula [I] In the formula, R1 and R4 each represent a hydrogen atom, an alkyl group or hydroxyl group having a water-soluble substituent, an amine group or a sodium sulfonate group, and "t+ R
8 and R6 are each a hydrogen atom, a hydroxyl group,
Represents a methoxy group, an oxysulfonic acid group, a nitro group, a ryomino group, a halogen atom, a hydroxycarbonyl group, an alkylcarbonyl group, an alkoxycarbonyl group, or a cyan group.

In the formula, Bird and Ro each represent a hydrogen atom, an alkyl group having a water-soluble substituent, a hydroxyl group, an ami7 group, or sodium sulfonate, R,, R8
,R,. and Ro each represent a hydrogen atom, a hydroxyl group, a methoxy group, an oxysulfonic acid group, a nitro group, an amino group, a halogen atom, a hydroxycarbonyl group, an alkylcarbonyl group, a hydroxycarbonyl group, or a cyano group.

General formula [beat IB formula, R1! and R□ represents a substituted or unsubstituted aryl group, R14 represents a hydrogen atom, an alkyl group having a water-soluble substituent, a sodium sulfonate group, a ryomino group, or a hydroxyl group, and R5 represents a hydrogen atom or a hydroxyl group. , methoxy group, oxysulfonic acid group, nitro group, ryomino group, halogen atom, hydroxycarbonyl group,
Represents an alkylcarbonyl group, an alkoxycarbonyl group, or a cyano group.

In the formula, R1 represents a hydrogen atom, an alkyl group having a water-soluble substituent, a sodium sulfonate group, a ryomino group, or a hydroxyl group, and R1? represents a hydrogen atom, a hydroxycarbonyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an amide group, or a cyano group,
xI and Y are respectively hydroxycarbonyl group, alkylcarbonyl group, alkoxycarbonyl group, ami7
or cyano group.

General formula [V] 18 In the formula, R18 represents a hydrogen atom, an argyl group or sulfonic acid sodium salt having a water-soluble substituent, an amino group or a hydroxyl group, and I'l+o represents a hydrogen atom, a hydroxycarbonyl group, an alkylcarbonyl group , represents an alkoxycarbonyl group, a cyano group, and X
, and Y! each represents a hydroxycarbonyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an amino group or a cyano group.

Typical specific examples of the dye compounds according to the present invention represented by the above general formulas [1] to [V] are described below, but the present invention is not limited to these.

(Exemplary Compounds) H 00H,0OOI( 00H2000H 00H,00(IH 00H,OOOH) According to the present invention, the dye compound according to the present invention described above has a spectral region in which the silver halide grains used in the present invention have the highest sensitivity. It has an absorption maximum on the shorter wavelength side.As the silver halide grain composition used in the direct positive silver halide photographic light-sensitive material of the present invention, silver halide of various compositions described below can be used. or preferably silver chlorobromide or silver bromide.

Usually, the highest range of the spectrum of silver chlorobromide and silver bromide mentioned above varies slightly depending on the composition, or is between 400 nm and 400 nm.
It is in the range of 50 nm. Therefore, the absorption of the dye compound according to the present invention is preferably within the above range.

The dye compounds according to the present invention represented by the general formulas [I] to [V] are directly positive halogenated b'? It may be contained on the support of a true light-sensitive material in at least one of the source-sensitive silver halide emulsion layer and/or the hydrophilic colloid layer on the same side of the support as this light-sensitive layer.

The dye compound according to the present invention may be dissolved in a TB solution containing a hydrophilic solvent such as water or methanol alone or in combination and added to a coating composition for a hydrophilic colloid layer such as a silver halide emulsion. 1 The dye compound is preferably added to the silver halide emulsion layer of the hydrophilic colloid layer.

The amount of these dye compounds added varies depending on the type of dye compound, the composition of silver halide, etc.
The amount ranges from 1 mg to 1000 mg, preferably from 50 to 500 mg.

The silver halide emulsion used in the present invention can be prepared by an acid method, a neutral method,
Alternatively, the remains may be produced by any method such as the ammonia method.
Examples of silver halides include silver oxide, cylindrical silver, and 17. ．． Examples include silver monobromide, silver iodobromide, silver chlorobromoiodide, and the like.

Further, the silver halide grains used in the present invention have an average grain diameter of 0.01-. 2 microns or better, preferably 0.002 to 1 micron.

Further, the particle size frequency distribution may be wide or narrow, but a narrower one is preferable.

Further, the silver halide grains may have a single crystal habit or a mixture of various crystal habits, but a single crystal habit is preferable.

The direct positive silver halide used in the present invention contains an internal electron acceptor (that is, a metal atom contained inside the silver halide grains) and an organic desensitizer that is adsorbed on the silver halide surface, either alone or in combination. can be contained.

The internal electron acceptor used in the present invention is preferably a water-bathable metal such as 01 rhodium salt or iridium salt. ) sodium chloride, iridium (2) sodium chloride, iridium (2) potassium chloride, iridium (5) ammonium bromide, etc.

The amount added is preferably from 1r to 10% per mole of silver halide, and more preferably from 10-4 to 10"mol.

Organic desensitizers that can be used in the present invention include, for example, dimethine cyanine dyes containing a 2-(nitro-substituted phenyl-indole nucleus, bis-(l-alkyl-2-phenyl-indole-
3-trimethine cyanine dye, cyanine multiplicative sum containing an aromatic substituted indole nucleus, imidazoquinoxaline dye, asymmetric cyanine dye containing a carbazole nucleus, trimethine cyanine dye containing a 2-aromatic substituted indole nucleus, 2.3.3= ) cyanine dyes containing a realkyl-5H-nitroindole nucleus, cyanine dyes containing a complex fused pyrimidinedione nucleus, 2-ynoxazolin-5-one nucleus, 2-pyrazoline-
quaternized merocyanine dyes with a 5-one nucleus or a complex fused pyrimidinedione nucleus, 2-(, allylimino or alkylimino, cyanine dyes with a 4-allyl (or alkyl)-3-thiazoline nucleus, 3-aryl) Mino or 3-lower fatty acid amide rice replacement 2
-merocyanine quaternary ammonium salt dyes having pyrazolin-5-one, pyrylium, thiapyrylium or selenapyrylium salt dyes, cyanine dyes having a nitro-substituted 2-arylindole nucleus, bipyridinium salt dyes, carbon atoms at the 2-position cyanine dye containing a pyrrole nucleus bound by 1.2-diaryltrimethine indole dye, cyanine dye containing a 4-pyrazole nucleus, polymethine dye containing an imidazole nucleus, dimethine cyanine dye containing a 2-phenyl substituted indole nucleus, 2 trimethine cyanine dyes consisting of two indole nuclei, cyanine dyes containing a 1-cyanoalkyl-2-arylindole nucleus, cyanine and merocyanine dyes in which two nuclei have desensitizing substituents such as nitro groups, 1-alkyl-2 -Cyanine dyes containing a phenyl-substituted indole nucleus, cyanine dyes containing a 1-alkoxy-2-arylindole nucleus, cyanine dyes containing an imidazo[415+6]quinoxaline nucleus, dyes containing a cycloheptanetriene ring, dimethine cyanine containing an indole nucleus Dyes, cyanine dyes containing a pyrazolo[1,5-a]benzimidazo-1-1 nucleus; cyanine dyes containing a pyrazolo[5,1-b]quinazolone nucleus; and cyanine dyes containing a pyrazolo[z,3-b]pyridine nucleus. Dimethine cyanine dyes, cyanine dyes containing a pyrrole nucleus, dyes containing a pyrrolo L2,1-b]thiazole nucleus, cyanine dyes containing an i≧dole or indolenine nucleus containing a benzoyl or phenylsulfonyl substituent, and the like are useful.

Fog can be applied to the direct positive silver halide used in the present invention by a conventionally known technique after removing water-soluble salts generated after the silver halide is precipitated. The fogging may be performed using a reducing agent alone or in combination with a reducing agent and a gold compound.

Many types of reducing agents can be used as the reducing agent, and the following reducing agents are suitable.

That is, when the reducing agents preferably used in the present invention are classified and shown, the first class is thiourea dioxide, and the second class is the general formula [IV] HtN YENH-Y%
Polyamines expressed in NHZ (where n is 1 to
is an integer of 5, and Y is an alkylene group having 2 to 4 carbon atoms, provided that two or more Ys present in the same molecule may be different alkylene groups. ) can be mentioned.

Specific examples include (1) diethylenetriamine, (2) triethylenetetramine, (3) tetraethylenepentamine, (4) )ripropylenetetramine, (5) spermine, (6) N-(4-aminobutylnocata). Belin, etc. can be mentioned.

The third class includes boron compounds, which can be further subdivided into: (A) Specific examples of boron hydride compounds include sodium borohydride.

(B) Alkylamine borane represented by the following general formula [VI] General formula [VI] 11 RtoH:BH8 tt Here, in the formula, Rto is an alkyl group having 1 to 20 carbon atoms, and R71 and R21 are It is the same as R2° or a hydrogen atom.

Specific examples include (7) trimethylamine borane, (8) t-butylamine borane, (9) dimethyldodecylamine borane, and the like. In addition, (0) a-carrylic amine borane, specific examples include (pyridine borane, three isomers of pyridine borane and picoline borane (i.e. α, β and γ-picoline borane, morpholine borane, etc.) can be mentioned.

These are generally 1, OX per mole of silver halide.
It is used in the range of I O-'-1, OX I O'''T-ru.

Typical gold compounds are chloroauric acid and chloroauric acid)
Examples include IJium, sulfur compounds, selenium compounds, etc., and generally 1.0% per mole of silver halide. OX 10"'-1, OX1
It is preferable to contain it in the range of 0 mol.

The degree of fog in the silver halide emulsion used in the present invention can be varied over a wide range. The degree of occurrence of this fog is determined by the silver halide composition of the silver halide emulsion used, the grain size, etc., the type and concentration of the fogging agent used, the emulsion pH 1pAg at the time of fogging, and the
Although it varies depending on time and the like, it is possible to control fog to a preferable degree by setting the above conditions.

The direct positive silver halide photographic impression material of the present invention includes:
Selenium compounds as described in JP-A No. 46-4282, halo 'f T'+lT original active compound solarization promoter of JP-A No. 5Q-J9Q20 No. 411-1, and optical sensitizers; For example, dimethine trimethine cyanine dyes, halogen-substituted hydroxy 7-thalein dyes, phenazine dyes, benzothiazole, cyanine dyes containing benzoselenazole nuclei, cyanine dyes containing naphtho-oxazole nuclei, triphenylmethane dyes, and indolenine nuclei. cyanine dyes containing, cyanine dyes containing 2-pyridine-rhodanine nuclei, cyanine dyes containing thiazole nuclei, asymmetric cyanine, quinoline, meso-substituted cyanine dyes, cyanine dyes containing rhodatene nuclei, polymethine dyes having three nuclei. By containing at least one selected substance such as an optical sensitizer, high e,
Providing IJL is OJ ability. .

In the direct positive silver halide photographic light-sensitive material of the present invention,
Various other commonly used photographic additives can be included.

As a stabilizer, for example, triesters, zyindenes, quaternary benzothiazolium compounds, merkaft compounds,
Or cadmium, cobalt, nickel, manganese,
It may also contain water-soluble inorganic salts such as gold, thallium, and zinc.

In addition, as a hardening agent, for example, formalin, glyoxal, aldehydes such as mucochloric acid, S-triazines,
Epoxies, aziridines, vinyl sulfonic acids, etc., coating aids such as subonine, sodium polyalkylene sulfonate, lauryl or oleyl monoether of polyethylene glycol, amylated alkyl taurine, fluorine-containing compounds, etc., and sensitizing agents. As the material, for example, polyalkylene oxide and its derivatives may be contained.

Furthermore, it is also possible to contain color couplers.

In addition, brighteners, preservatives, matting agents, and antistatic agents may also be contained as necessary.

The silver halide photographic material of the present invention contains, as storage colloids, gelatin, gelatin derivatives, and natural substances such as albumin, agar, gum arabic, and alginic acid, as well as polyvinyl alcohol, polyvinyl acrylate, polyvinyl pyrrolidone, and cellulose ether. Hydrophilic polymers such as partially hydrolyzed cellulose acetate, poly(N-hydroxyalkylla β-alanine derivatives) grafted with ethylene oxide can be contained.

Furthermore, a dispersion polymerized vinyl compound may be contained as an emulsion binder. For example, polymer latex of unsaturated ethylene monomer emulsion-polymerized in the presence of a surfactant, polymer latex of unsaturated ethylene thread monomer grafted with a polymer compound that cures aqueous groups using ceric salt. It is preferable to contain the like from the viewpoint of improving the physical properties of the film.

In addition, from the perspective of emulsion technology, developers are protected and contained, and higher fatty acids (such as liquid paraffin) and higher unsaturated fatty acids (such as stearyl acetoglyceride) are protected to improve film properties. Depending on the purpose, color couplers, stabilizers, ultraviolet absorbers, etc. may also be included for protection.

Direct positive silver halide copy A obtained in this way
Any suitable photographic support can be used for the 11-light material.

Examples of photographic supports include glass, wood, metal, resin films (e.g. cellulose acetate, cellulose acetate butyrate, cellulose nitrate, polyester, polyamide, polystyrene, etc.), paper, baryta-coated paper, polyolefin-coated paper (e.g. polyethylene or polypropylene coated paper, etc.).

Polyolefin-coated paper can be subjected to electron impact treatment to improve emulsion adhesion.

(Specific Effects of the Invention) As the developer for the direct positive silver halide photographic light-sensitive material of the present invention, a developer used for general silver halide photographic light-sensitive materials can be used.

As developing agents, hydroquinone, chlorohydroquinone, dihydroxybenzenes such as catechol, 1-
Phenyl-3-pyrazolidone, 1-phenyl-4,4-
3-pyrazolidones In,N-methyl such as dimethyl-3-pyrazolidone, 1-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone, l-phenyl-4-methyl-4-hydroxymethyl-3-pyrazolidone −
Paraaminophenols such as p-aminophenol, N-(4-hydroxyphenylnobrisin), β-methanesulfonamidoethyl, ethylaminotoluidine, N
, p- such as N-diethyl-p-phenylenediamine
Examples include phenylenediamines and asmarbic acids.

An aqueous solution containing one or more of these developing agents is used, in addition to preservatives such as potassium sulfite, formaldehyde sodium bisulfite, hydroxylamine, ethylene urea, and developing agents such as potassium bromide and potassium iodide. Inhibitor, l-phenyl-5-mercaptotetrazole, 5-nitrobenzimidazole, 5-nitrobenztrizole, 5-nitroindazole, 5-methyl-
Organic antifoggants such as benztriazole, 4-thiazoline-2-thione, alkaline and buffering agents such as sodium carbonate, potassium hydroxide, borax, jetanolamine, triethanolamine, sodium sulfate, l! I'll: Sodium acid, salts such as sodium citrate, KDTA-2Na.

Water softeners such as nitrotriacetic acid, hydroxyethylenediaminetriacetic acid, developer hardeners such as glutaraldehyde, solvents for developing agents and organic inhibitors such as diethylene glycol dimethylformamide, ethyl alcohol, benzyl alcohol, methylimide. Development accelerators such as dacillin, methylimidazole, polyethylene glycol with an average molecular weight of 154 o, and dodecylpyridinium bromide can be added.

Although the pH of the developing solution is not subject to any restrictions, a pH of 8 to 13 is usually used, preferably 9 to 12.

It is more preferable that the direct positive silver halide photosensitive film '#A-1 of the present invention is subjected to lithographic development.

The Lith developer has as its main component p-dihydroxybenzene-based developing agents such as hydroquinone, alkyl-substituted hydroquinone, and halogen-substituted hydroquinone, either alone or in combination.

The amount of the developing agent added is 1 to 100 g/11 of the developer, preferably 10 to 30 g. ! It is i+.

The developer solution may further contain a subsequent developing component, and these components can be included in a suitably selected solution.

One example of such components is a preservative for the developing agent.

As a preservative, sulfite (alkali sulfite 1) metal salt,
Metabisulfite alkali metal salts are used 1. ), and there is no particular restriction on the concentration of free sulfite ions, but it is preferably less than 6 g per horse power, 11 equivalents of developer. Additionally, sulfite ions may be added as buffers, such as carbonyl (,0=O) adducts, cyclohexanone or acetone and soluble sulfite adducts. Adducts of the compound and soluble sulfites, as well as mixtures thereof with aliphatic primary or secondary amines, etc. are used.

The amount of sulfite ion buffer added is 0 per 1 liter of developer solution.
-150g%, preferably 20-80g.

An alkali agent may be added to the lithium developer, and examples of the alkali agent 5 include alkali metal hydroxides, alkali metal carbonates, alkali metal borates, etc., and the pH of the developer is pl. (8 or more, especially pi (preferably 9 to 11).

Furthermore, pH adjusters (acetic acid, citric acid,
Water-soluble acids and salts such as tartaric acid and boric acid), development regulators (halogenated lucarinos such as potassium bromide and sodium chloride, organic antifoggants (6-nitrobenzimidazole, 5-nitrobenzimidazole, etc.)
or 6-nitroindazole, 5-mercaptotetrazole, hydroxytetracinthenes], air antioxidants (ascorbic acids, kojic acids, phenols, resorcinols, pyritazines, cysteines, histidines, primary, secondary or tertiary amines, hydrazines, hydroxyamines, ethylene ureas, ureas, ryomidos/rongalit, γ-pyrones), development accelerators (potassium iodide, imidazoles, i, migzolins, pyridinium salts) , trace amounts of 1-phenyl-3
-pyrazolidones, p-methylaminophenols),
Organic solvents (glycols such as triethylene glycol,
Amines, dimethylformamide, cellosolve, alcohols), halftone dot 1q improvers (polyalkylene oxide, water softeners (nitroacetic acid, ethylenediaminetetraacetic acid, etc.)) can also be added as necessary.

As mentioned above, the lithium developer used for developing the direct positive silver halide photographic material of the present invention only needs to contain each necessary component during development, and the composition of the developer before use, etc. However, the present invention is not limited to the following: The direct positive silver halide photographic material of the present invention can be applied to various uses. For example, various photosensitive materials for printing such as duplication gating, reproduction, and offset mastering, special photosensitive materials such as X-ray, flash photography, and electron beam photography, as well as general copying, microcopying, and direct positive photosensitive materials. It is used in various types of direct positive photosensitive materials such as type color, quick stabilized, diffusion transfer, color diffusion transfer, and -bath development and fixing.

Hereinafter, the present invention will be explained in more detail with reference to Examples.
This does not limit the embodiments of the present invention.

Example 1 While keeping an aqueous gelatin solution containing 30 μl of rhodium trichloride per mole of silver at 30°C, an aqueous solution containing 1 mole of silver nitrate was added, and then an aqueous solution containing aqueous ammonia and 1.1 mole of potassium bromide was added. Aqueous solution was added and mixed.

After neutralizing this emulsion, water-soluble salts were removed by a conventional agglomeration method, and gelatin was added to obtain an ammoniacal silver bromide emulsion with an average grain size of 0.3 μm.

The emulsion was then added with 12 η of thiourea dioxide per mole of silver halide and aged at 65° C. until maximum performance was achieved, causing fog.

This emulsion was divided into several equal parts, and as shown in Table 1 below, exemplified dye compounds were added, saponin was added as a coating aid, and formalin was added as a hardening agent so that the silver amount was 3.5 g/m. was applied onto the film base and dried.

The obtained sample was exposed to light using a printer P-605FS manufactured by Dainippon Screen Co., Ltd. through a light filter, and then exposed using a Sakura Doll Type 621 developer (manufactured by Konishiroku Photo Industries) using a Sakura Automatic Processor QS25 (Konishiroku Photo Industries 'M).
) for 20 seconds at 38°C, fixed, washed with water, and dried.

The results are shown on the outer material.

After further exposure to form a halftone dot of 50% using Dainippon Screen's printer P-605Fs, it was left for 10 minutes under a 200 lux anti-fading lamp manufactured by Mitsubishi Electric, and then Sakura Doll type 621 developer ( Sakura Automatic Processor QS-
25 (manufactured by Konishiroku Photo Industry ■) at 38° C. for 20 seconds, fixing, washing with water, and drying. In addition, the printer P-605'
After exposure with FS, development, fixing, washing, and drying were performed in the same manner as above.

The obtained results are shown in Table 2 as above. In Table 2, γ is evaluated in 5 steps in order of high contrast, and safelight properties and exposure latitude are also evaluated in 5 steps in order of superiority, with larger numbers representing better.

Table 1 Table 2 From the results shown in the above table, it can be seen that all of the samples to which the dye according to the present invention was added had a wide M range without any decrease in gamma, and had excellent safelight properties. Recognize.

Example 2 An aqueous gelatin solution containing 25 mol of rhodium trichloride and 2.5 mol of potassium bromide and an aqueous solution containing 2.5 mol of silver nitrate per mol of silver were added to an aqueous gelatin solution with a pH of 2 kept at 55°C. While controlling the silver content to 140 mV and the pH to -2, the mixture was mixed for 70 minutes using an ion mouse double jet method appropriate for grain growth.

At the end of mixing, the pH was adjusted to 5.5, water-soluble salts were removed by the usual flocculation method, gelatin was added, and the average particle size was adjusted to 0.5.
A 2μ monodisperse silver bromide emulsion was prepared.

Next, 60 In9 per mole of silver halide was added to this emulsion.
of triethylenetetramine was added, and the mixture was aged at 65°C for 60 minutes. 1. Furthermore, chloroauric acid was added at 3 Da per mole of silver halide, and the mixture was aged at 65°C until the highest performance was obtained, causing fog.

This emulsion was divided into several equal parts, exemplified compounds were added as shown in Table 3, saponin was added as a coating aid, glyoxal was added as a hardening agent, and a film was prepared with a silver content of 3-59/m. Coat it on the base and let it dry.

The obtained sample was exposed to light through a light wedge, and developed for 1 minute at 32°C in a Sakura Automatic Processor GQ-25 (manufactured by Konishiroku Photo Industries) using Sakuradol Lisotype 271 developer (manufactured by Konishiroku Photo Industries). imaged, fixed, washed with water, and dried.

Further, in the same manner as in Example 1, the film was exposed to μλ light twice the proper exposure in one shot, and then developed in the same area as above, fixed, washed with water, and dried. The results obtained are shown in Table 4.

Table 3 Table 4 From the results in the above table, it can be seen that the dye compound according to the present invention does not cause a decrease in gamma even when added to a monodisperse silver bromide emulsion, and is excellent in safelight properties and sawtooth latitude. made clear.

(Effects of the Invention) The fogged direct positive tin halide photographic material to which the dye compound according to the present invention is added has high contrast and excellent safelight properties and exposure latitude.

Agent Patent Attorney No 1) Parent-in-law

Claims (1)

[Claims] In a direct positive silver halide photographic light-sensitive material containing fogged silver halide grains, the silver halide grains have absorption in a spectral region exhibiting the highest sensitivity, and the sensitivity is shorter than the spectral region having the highest sensitivity. A direct positive silver halide photographic light-sensitive material characterized by containing a dye having an absorption maximum on the wavelength side.