RU2091848C1 - Silver halide photographic material - Google Patents

Abstract

FIELD: photographic industry. SUBSTANCE: material consists of base, one of sides of which supports successively disposed (i) photosensitive layer made of gelatin AgBr/AgI emulsion containing 3,3'-di-γ-sulfopropyl-9-ethyl-5,5'- diphenyloxycarbocyaninebetaine pyridinium salt (spectral sensitizer) and 3,3'-[1",2"-bis(ethoxy)ethyl]-bis(1-ethylbenzimidazolium) diperchlorate or 3,3'-[1",2"-bis(ethoxy)ethyl]-bis(1-ethyl-2-methyl-5- chlorobezimidazolium) ditosylate (activator of spectral sensitizing) and (ii) gelatin antihalation counterlayer including antihalation dyes: condensation product of benzaldehydedisulfonic acid and hydroxythionnaphthenic acid; potassium salt of fuchsin sulfonation product; and 4-chloro-4-di(2-hydroxyethyl)amino-4"-(2- hydroxyethyl)ammonium chloride triphenylmethane. Material is supposed to be used in film duplicating and microfilming. EFFECT: improved chemical composition of material. 1 tbl

Description

 The invention relates to the field of photographic chemistry, in particular to high-resolution orthochromatic silver halide photographic materials with a sensitization limit of not more than 580 nm, which can be used to counter-copy and microfilm small-scale black and white aerial films.

A known orthochromatic silver halide material designed to counter-copy aeronegatives, consisting of a substrate, on one side of which a photosensitive layer is sequentially applied, made of a mixture of low-sensitivity and highly sensitive homogeneous gelatinous silver-bromide emulsions, present in a weight ratio of 1 to 3, including spectrally sensitive 3-sensitizing 5 [1-methyldihydro- (1 ', 2') - pyridylidene-2] oxazolidinedion-2-OH-4, and a gelatinous protective layer, and on the other red is yellow new antihalation backing layer comprising a yellow antihalation dye is a condensation product of benzaldehyde-2,4-disulfonic acid and in an amount oksitionnaftenovoy (90-110) • 10 ^-2 g / g gelatin antihalation dye and red - potassium salt of sulfonation product in an amount fuchsin (2, 5-3.0) • 10 ^-2 g / g of gelatin (Technological regulations of KazNIITECHFOTOPROEKT for the manufacture of film type A-3).

However, this material has a low resolution of 260 mm ^-1 and a photosensitivity of S _0.2 0.2, S _0.85 0.65 units. GOST at T _color 2850 K.

Closest to the proposed technical essence is an orthochromatic material with a sensitization limit of 480 to 560 nm, intended for microfilming graphic information, consisting of a substrate, on which side a photosensitive layer is sequentially applied, made of a homogeneous gelatin-silver-silver emulsion with an average size of cubic microcrystals d _cf 0.2 μm, the content of silver iodide 5 mol. values of pBr 2.8 3.2, pH 6.5 6.8 and the ratio of the weight of gelatin to the weight of silver metal ρ 1.6, including the spectral sensitizer -3,3'-di-g-sulfopropyl-9-aminothiacarbocyanin betaine in the amount of ( 0.66 - 0.70) • 10 ^-3 g / g of metallic silver and a gelatinous protective layer, and on the other gelatinous protivoreolny counter layer, including protivoreolnyh dyes, the condensation product of benzaldehyde-2,4-disulfonic acid and oxy-naphthenic acid (I) in amount (9-11) • 10 ^-2 g / g gelatin and a potassium salt of sulfonation product fuchsin (II) in an amount (2,5 3,0) • 10 ^-2 / G gelatin (Technological Regulations KazNIITEHFOTOPROEKTa on the film fabrication for microfilming Mikrat VE-N 03239-82).

This material has a fairly high photosensitivity (S _0.85 50 units GOST at T _color 5000 K), however, it has a low resolution (320 mm ^-1 ).

 The purpose of the invention is to increase the resolution while maintaining the photosensitivity of the material in the area of spectral sensitization of 480 580 nm.

The goal is achieved in that in a silver halide photographic material consisting of a substrate, on one side of which a photosensitive layer made of a gelatin-silver-silver emulsion comprising a spectral sensitizer and a gelatin-like protective layer is sequentially applied, and on the other gelatin-type anti-areole counter-layer, which contains anti-reactive dyes, is a condensation product benzaldehyde-2,4-di-sulfonic acid and oxy-naphthenic acid (I) and the potassium salt of the fuchsin (II) sulfonation product; the photosensitive layer is made of silver bromide-silver emulsion with a silver iodide content of 3 ± 0.1 mol. the size of the microcrystals of cubic form d _cf. 0.17 0.19 μm, pBr 2.9 -3.1; pH 6.7 7.3; ρ 1.2 1.4 and contains, as a spectral sensitizer, the pyridine salt of 3,3'-di-g-sulfopropyl-9-ethyl-5,5'-diphenyloxacarbocyanin betaine in the amount of (1.5 2.5) • 10 ^-3 g / g Ag and optionally an activator of spectral sensitization of di-perchlorate 3.3 '[1``, 2''- bis (ethoxy) ethyl] bis- (1-ethyl-benzimidazolium) in an amount of (1.2 -1, 6) • 10 <sup>-2</sup> g / g of metallic silver or di-tosylate 3.3 '- [1``, 2''- bis (ethoxy) ethyl] bis [1-ethyl-2-methyl-5 chlorobenzimidazolium] in the amount of (1.5 3.2) • 10 ^-3 g / g of metallic silver, and the gelatin protivoreole counter layer contains (I) in the amount of (2.0 - 8.0) • 10 ^-2 g / g gelatins, (II) in an amount of (2.0-7.0) • 10 ^-2 g / g gelatins and additionally contains 4-chloro-4'-di (2-hydroxyethyl) amino-4 '' - di ( 2-hydroxyethyl) -ammonium chloride triphenylmethane in an amount of (2.0 5.0) • 10 ^-2 g / g gelatin (III).

 Thus, the difference between the proposed material from the prototype material is the joint use of an emulsion layer made of an emulsion with the above parameters and an antireolen counter layer, including these ingredients in the indicated amounts, as a result of which the resolution of the orthochromatic material increases to a predetermined value while maintaining a given level of photosensitivity, which is unattainable when using one of these distinctive features.

 The use of the indicated type of emulsion in the proposed material is due to the possibility of its use for a wider field of photographic research methods, which will make it possible to obtain a new universal material intended both for microfilming and for counter-copying.

 The introduction of the specified spectral sensitizer and the specified sensitization activators, as well as their quantitative ratio, is caused by the need to achieve a high level of resolution and photosensitivity, and also helps to eliminate residual discoloration after chemical-photographic processing.

 The use of a protivoreole layer containing said protivoreole dyes helps to reduce light scattering in the emulsion layer, which leads to an increase in resolution.

 In addition to these ingredients, the photosensitive, protective and antireolen counterlayers may contain conventional processing aids, such as wetting agents, tanning agents, antivalents, stabilizers, antioxidants.

Example 1. (prototype). For the manufacture of the material according to the prototype, an emulsion is used, synthesized according to the technological regulations of KazNIITECHFOTOPROEKT N 03239-82 for the manufacture of Mikrat-VE film. The following solutions are used for emulsification:
Solution N 1
Gelatin 300 g
Desalted water 16,200 ml
Temperature (40 ± 0.5) ^o C
Solution N 2
Ammonia 25th 1500 ml
Silver nitrate 1574.4 g
Desalted water Up to 6900 ml
Temperature (30 ± 0.5) ^o C
Solution N 3
Potassium bromide 1047.7 g
Potassium iodide 76.8 g
Desalted water Up to 6900 ml
Temperature (30 ± 0.5) ^o C
Solution N 2a
Silver nitrate 170 g
Desalted water 500 ml
Solution N 3a
Potassium bromide 119 g
Desalted water 500 ml
Solution N 4
Sodium thiosulfate, 0.05th 150 ml
Solution N 5
Polyox-100 copolymer with acrylic acid, 0.2-nd 300 ml
Solution N 6
Acetic acid, 30th 2000 ml
A solution of N 1 is placed in the reactor and a pBr value of 3.0 ± 0.2 is set by introducing a 10-KBr solution and, with stirring at 600 rpm, by the controlled two-jet emulsion, working solutions N 2 and N 3 are simultaneously fed into solution N 1. in the 10th minute from the start of the emulsification, solution N 4 is sprayed, at the 12th minute, solution N 5 is injected for 30 s, at the 14th minute solution N 6. If during emulsification a deviation from the set value pBr 3.0 ± 0 is observed , 2, the correction of pBr value with the help of NN 2a and 3a solutions is given. Emulsification ends after the complete flow of solutions.

After the end of the emulsification, the solid phase is separated by introducing 3,750 l of a 5% solution of dispersant Na-salt-sulfonation of naphthalene formaldehyde resin and 3 l of a 20-solution of sodium sulfate, then after settling (20-30 min) the centrate is drained, the indicators of the centrate are: pBr 3,8 - 5.0; pH 8.5 9.0. The precipitate is washed with decantation, dispersed with water for 10 minutes with vigorous stirring, injected with a gelatin-water solution and continued to disperse for 30 minutes. At the end of the dispersion, the pH and pBr were adjusted to 6.5 6.8 and 2.8 3.2, respectively, by the addition of a 10% solution of KBr and CH ₃ COOH.

 The mass of the emulsion is brought with demineralized water to 30 kg.

Chemical maturation of the emulsion is carried out by sequentially introducing at a temperature of (48 ± 0.5) ^o C 600 ml of a 20% solution of sodium benzenesulfinic acid, 150 ml of a 0.1% solution of sodium salt of isobutylene benzene thiosulfonic acid, 150 ml of a 0.05% solution of sodium thiosulfate, 90 ml of a 0.04th solution of rhodanide gold, 300 ml of a 1-solution of rhodanide potassium and maintained until the optimum level of photosensitivity and optical density of the veil.

An emulsion is obtained with the following parameters:
The average size of the emulsion microcrystals, d _cf 0.2 μm
AgI content 5 mol%

pBr emulsion 3.0 ± 0.2
emulsion pH 6.5 6.8
ρ the ratio of the weight of gelatin to the weight of metallic silver 1.6
The technological process of watering the film consists of the following operations:
preparation of the emulsion for irrigation;
preparation for watering the solution of the protective layer;
preparation for irrigation of a solution of an antireolene counter layer.

Preparation of the emulsion for irrigation is carried out by the sequential introduction of 1 kg of emulsion at a temperature of (40 ± 0.5) ^o C 10 ml of a 1% aqueous solution of 5-methyl-7-hydroxy, 1,3,4 triazoindolecin, 2 ml of 1% - alcohol solution of a - naphthol, 5 ml of an aqueous solution of pyrocatechol, 200 ml of a 0.05 alcohol solution of a sensitizer of 3,3'-di-γ-sulfopropyl-9-aminothiacarbocyanine betaine, 5 ml of 12% aqueous tanning agent solution — a composition based on 2,4-dichloro-6-hydroxy-triazine-1,3,5 monosodium salt and sodium metaborate and 5 ml of a 5% aqueous solution of tanning agent — diglycidyl methylphosphoric acid ester and 15 ml of a 0.125 M aqueous solution of a wetting agent, a polycondensation product of 1 mole of octaglyceride-2-ethylhexyl succinic acid with two moles of 2-ethylhexyl succinic anhydride, which is 0.0007, respectively; 0,0002; 0,00034; 0,00068; 0.0034; 0.0157 g / g metallic silver. The emulsion is filtered using vacuum through a filter set consisting of two layers of cardboard and one layer of cambric and kept in a thermostat for 60 minutes at a temperature of (40 ± 0.5) ^o C.

To prepare for irrigation of the solution of the protective layer, 1 ml of a 1.2 ml water-gelatin solution is injected with 5 ml of a 4-solution of glyoxal, 5 ml of a 3.7-solution of formalin, 3 ml of a 12-solution of a tanning agent of monosodium salt 2.4 -dichloro-6-hydroxy-triazine-1,3,5 and sodium metaborate and 16 ml of a 4-aqueous propanol solution of a wetting agent of sodium salt of di-2-ethylhexyl ether sulfosuccinic acid. After the introduction of additives, the solution is filtered and kept in a thermostat at a temperature of (32 ± 0.5) ^o C for 1 h.

To prepare for irrigation of the solution of the antireolen layer per 1 liter of a 6% aqueous gelatin solution at a temperature of (40 ± 0.5) ^o C, 40 ml of a 15% aqueous solution of the yellow antireolen dye of the condensation product of benzaldehyde-2,4-disulfonic acid are introduced and oxyethionic-naphthenic acid (1), 20 ml of an 8-alcohol solution of a red anti-rheumatic dye - a potassium salt of the product of sulfonation of fuchsin (II), 5 ml of a 12-solution of a tanning agent based on a monosodium salt of 2,4-dichloro-6-hydroxytriazine- 1,3,5 and sodium metoborate, 5 ml of the 4th solution of glyoxal, 2 ml 0.125 M solution of a wetting agent of the sodium salt of di-2-ethylhexyl ether sulfosuccinic acid, which is respectively for (I) and (II) 10 • 10 ^-2 and 2.7 • 10 ^-2 g / g gelatin. Upon reaching a temperature of (40 ± 0.5) ^o C, the solution is filtered using vacuum.

 The prepared emulsion and the solution of the protective layer are simultaneously applied on one side of the PETP-65 brand of polyethylene terephthalate base, on the other side of which a solution of the antireoleic counter layer is applied.

 Silver deposit is determined by the method of Folhard.

Sensitometric tests of the material are carried out in accordance with GOST 1069-10-73 on the FSR-41 sensitometer at T _color 5000 K and 2850 K.

Chemical-photographic processing is carried out in a developer UP-2 at a temperature of (20 ± 1) ^o C.

 The size and shape of emulsion microcrystals is determined using an EVM-100AK electron microscope.

 Optical densities are measured on a DP-1 densitometer.

 Resolution is determined on a resolver RP-2M as the absolute contrast with the aperture OS-16.

 The results are shown in the table.

Example 2. For the manufacture of the proposed material using an emulsion synthesized by the method of controlled two-jet emulsification using the following solutions:
First ripening
Solution N 1
Silver nitrate 30.92 kg
Desalinated water Up to 140 l
Solution N 2
Potassium bromide 24.37 kg
Potassium iodide 1.0 kg
Desalted water 160 l
Solution N 3
Gelatin 3 kg
Desalted water 200 l
Antifoam phenoxol, 5% solution of 0.05 L
Solution N 4
Ammonia 25th 0.250 L
Solution N 5
Potassium nitrate, 10% solution 1.0 l
Potassium bromide, 1st solution 0.2 L
Solution N 6
Acetic acid, 50% solution 0.35 L
A solution of NN 3 and 4 is placed in the reactor, a pBr value of 3.0 ± 0.2 is set, and a solution of NN 1 and 2 is simultaneously fed with two jets for 60 minutes at 40 ^° C.

 If the pBr value deviates from the set values, the pBr value is adjusted using solution N 5.

At the end of the first ripening process, N 6 solution is introduced into the emulsion and poured into the apparatus for separating the solid phase, where it is cooled to 32 ^o C.

 Into the cooled emulsion, 7 L of a 10% solution of sodium polystyrenesulfonic acid and 2 L of a 50% solution of acetic acid are introduced and settled until a clarified solution is obtained.

 At the end of the sedimentation, the pH values of pH 4.3 ± 0.6 and pBr 3.8 ± 0.2 are measured.

 The precipitate obtained is washed by filling the precipitation apparatus with demineralized water. The sediment is left to stand for 30 minutes.

 After washing and draining the wash water, the precipitate is dispersed. For preliminary dispersion, 1.5 l of sodium carbonate is introduced into the precipitate; 20 l of a 12th aqueous gelatinous solution and 100 l of demineralized water and stirred for 20 minutes, then 150 l of a 12th aqueous gelatinous solution are introduced until a value of ρ 1.2 is obtained.

 In this case, 400 kg of emulsion are obtained.

 The second ripening.

Chemical maturation of the emulsion is carried out by sequentially introducing at (49 ± 1) ^o C 3 l of a 1-solution of sodium thiosulfate, 10 l of a 25-solution of sodium benzenesulfinic acid, 2.5 l of a 0.08-solution of gold-hydrochloric acid and maintain until the optimum level photosensitivity and optical density of the veil.

The result is an emulsion with the following parameters:
The size of the emulsion microcrystals, d _cf , microns 0.17 0.19
AgI content 3 ± 0.1 mol
pBr emulsion 2.9 3.1
emulsion pH 6.7 7.3
r 1,2
Preparation of the emulsion for irrigation is carried out by the sequential introduction of 1 kg of emulsion at a temperature of (36 ± 1) ^o C 120 ml of a 1 aqueous solution of 5-methyl-7-hydroxy 1,3,4 triazoindolecin, 10 ml of a 1 aqueous solution of pyrocatechol, 75 ml of a 1 alcohol solution of the spectral sensitizer of the pyridine salt of 3,3'-di-g - sulfopropyl-9-ethyl-5,5'-diphenyloxacarbocyanin betaine (which corresponds to 1.5 • 10 ^-3 g / g of metallic silver), 30 ml of a 0.2% alcohol solution of the spectral sensitization activator-di-perchlorate 3.3 '- [1``, 2''- bis (ethoxy) ethyl] -bis- (1-ethyl-benzimide zolium) (activator 1), (which corresponds to 1.2 • 10 ^-3 g / g of metallic silver), 7.5 ml of a 0.1 M aqueous solution of a wetting agent of a polycondensation product 1 mole of octaglyceride-2-ethylhexyl succinic acid with two moles of 2- ethylhexyl succinic anhydride and 2.9 ml of tanning agent N, N, N ', N'-tetraisopropoxymethyldiamide malonic acid. The emulsion is filtered and incubated for 30-60 minutes at (36 ± 0.5) ^o C.

 Preparation for irrigation of the solution of the protective layer is carried out as in example 1.

Preparation for irrigation of the solution of the antireolene counter layer is carried out as in Example 1, but before the introduction of the yellow antireolene dye, 220 ml of the first aqueous solution of the green antireoleic dye - 4-chloro-4-di (2-hydroxyethyl) amino-4 '' - di ( 2-hydroxyethyl) -ammonium chloride triphenylmethane (III), which corresponds to 3.7 • 10 ^-2 g / g of gelatin, and (I) is administered in the amount of 32 ml of a 15-solution (which corresponds to 8 • 10 ^-2 g / g of gelatin )

 Watering the layers and testing the material is carried out as in example 1.

 The results are shown in the table.

 Example No. 3. For the manufacture of photographic material, the emulsion is prepared according to example No. 2, but with the difference that when ρ is dispersed, the emulsions are adjusted to a value of 1.3 by adding 165 liters of a 12-g water-gel solution. In this case, 430 kg of emulsion are obtained.

The preparation of the emulsion for irrigation is carried out according to example 2, but 90 ml of 0.1 ml solution of the spectral sensitizer of the pyridine salt of 3,3'-di-g-sulfopropyl-9-ethyl-5,5'-definyloxacarbocyanine betaine and 1 40 ml of a 0.2% alcohol solution of activator 1, which is respectively 2.0 • 10 ^-3 and 1.8 • 10 ^-3 g / g of metallic silver.

 To prepare for watering the solution of the protective layer, 1 ml of the fourth aqueous gelatin solution is injected with 10 ml of a 0.1 n wetting solution - sodium salt of di-2-ethyl-hexyltetraethylene glycol ether sulfosuccinic acid and 31.2 ml of tanning agent N, N, N ', N'- malonic acid tetraisopropoxymethyldiamide.

Preparation for irrigation of the antireolene counter layer is carried out as follows: per 1 liter of a 6th aqueous gelatin solution, 300 ml of a 1-solution of a green anti-aureole dye (III), 8 ml of a 15-solution of a yellow anti-rheole dye (I), 12 ml of 8- alcohol solution of a red antireolen dye (II), 75 ml of a 4-aqueous solution of a sodium salt wetter of di-2-ethyl-hexyltetraethylene glycol ether sulfonic acid, 22 ml of a 4-solution of formalin and 24 ml of a 5-solution of chromium acetic acid, respectively SOS ulation for (I), (II), (III) (2,0; 2,0; 5,0) • 10 ^-2 g / g gelatin.

 The characteristics obtained are shown in the table.

 Example 4. For the manufacture of photographic material, the emulsion is prepared according to example 2, but with the difference that when dispersing the ρ-emulsion is adjusted to a value of 1.4 by the introduction of 180 l of a 12th aqueous gelatin solution. Get 445 kg of emulsion.

When preparing the emulsion for irrigation per 1 kg, 110 ml of 0.1% alcohol solution of the spectral sensitizer of the pyridine salt of 3,3'-di-g-sulfopropyl-9-ethyl-5,5'-diphenyloxacarbocyanin betaine and 70 ml of 0.2 are added -th alcohol solution of activator 1, which is respectively 2.5 • 10 ^-3 and 3.2 • 10 ^-3 g / g of metallic silver.

 Preparation for watering the protective layer is carried out as in example 2.

Preparation for irrigation of the antireolen layer is carried out as in example 3, but 150 ml of a 1-solution of a green protivoreolnoy dye (III), 16 ml of a 15-solution of a yellow protivoreolnoy dye (I), 24 ml of 8% -th alcohol solution of a red antireolen dye (II), which, respectively, is for (I), (II), (III) (4.0; 3.0; 2.5) • 10 ^-2 g / g gelatin.

 The characteristics obtained are shown in the table.

Example No. 5. For the preparation of photographic material, the emulsion is prepared according to example 2, but in preparation for irrigation of the emulsion layer, 3.3 '- [1'',2''- bis (ethoxy) ethyl] is used as an activator of spectral sensitization. bis (1-ethyl-2 methyl-5-chlorobenzimidazolium) (activator 2) in the amount of 30 ml of a 0.25 solution per 1 kg of emulsion, which is 1.5 • 10 ^-3 g / g of metallic silver.

Preparation for watering the solution of the protective and anti-rheumatic layers is carried out as in example 3, but the dye (I) is introduced in the amount of 12 ml, (II) 65 ml; (III) 120 ml, which corresponds to (I), (II), (III) (3.0; 7.0; 2.0) • 10 ^-2 g / g of gelatin.

 The characteristics obtained are shown in the table.

Example No. 6. For the manufacture of photographic material, the emulsion is prepared according to example 3, but when preparing for irrigation of the emulsion layer, activator 2 is used as an activator of spectral sensitization in the amount of 40 ml of 0.25 alcohol solution per 1 kg of emulsion, which is 2.2 • 10 ^-3 g / g metallic silver.

Preparation for irrigation of the solutions, the protective layer is carried out as in example 3, and dyes (I) in the amount of 32 ml are introduced into the counter-layer counter layer; (Ii) 24 ml; (III) 180 ml, which corresponds to (I), (II), (III) (8.0; 3.0; 3.0) • 10 ^-2 g / g of gelatin.

 The characteristics obtained are shown in the table.

Example 7. For the manufacture of photographic material, the emulsion is prepared according to example 4, but with the difference that activator 2 is used as an activator of spectral sensitization in the amount of 57 ml of a 0.25 solution per 1 kg of emulsion, which is 3.2 • 10 ^{- 3} g / g metallic silver. Preparation for irrigation of the protective layer solution is carried out as in example 3, and in preparation for irrigation of the antireolen counter layer, dyes (I) were introduced - in an amount of 12 ml; II 24 ml; (III) 150 ml, which is (I), (II), (III), (3.0; 3.0; 2.5) • 10 ^-2 g / g of gelatin.

 The characteristics obtained are shown in the table.

 Example No. 8. For a photographic material, the emulsion is prepared according to example 2, but with the difference that when dispersing ρ, the emulsions are adjusted to a value of 1.6 by the introduction of 210 l of a 12-fold aqueous gelatin solution.

 520 kg of emulsion are obtained.

 Preparation for watering the emulsion and protective layer is carried out according to example 2.

 Preparation for irrigation of the antireolene counter layer is carried out according to example No. 3.

 The characteristics obtained are shown in the table.

 Example No. 9. For the manufacture of photographic material, the emulsion is prepared according to example 2.

 Preparation for watering the emulsion and protective layer is carried out according to example 2.

 Preparation for irrigation of the antireolene counter layer is carried out according to example 1.

 The results are shown in the table.

 Example No. 10. For the manufacture of photographic material, the emulsion is prepared according to example 2.

 Preparation for watering the emulsion layer is prepared according to example 1.

 Preparation for irrigation of the protective and protovoreole counter layer is carried out according to example 2.

 The characteristics obtained are shown in the table.

 Examples 8 to 10 show that an increase in resolution to a given level, at a given photosensitivity value, is achieved only when using the combination of these distinctive features.

As follows from the table, the resolution of the proposed material compared with the prototype increases from 320 to 520 580 mm ^-1 (60 - 80%), the rest of the sensitometric characteristics of light sensitivity, contrast ratio and optical density of the veil remain at the same level. In addition, the silver deposit is reduced to 2.0 ± 0.08 g / m ² .

Claims (1)

Silver halide photographic material, consisting of a substrate, on one side of which a photosensitive layer is arranged successively, made of a gelatin silver-bromide emulsion containing a spectral sensitizer and a gelatin protective layer, and on the other side is a gelatin anti-oreole counter layer containing anti-areole dyes: benzaldehyde-2 condensation product 4-disulfonic acid and naphthenic acid oxytion (I) and potassium salt of fuchsin (II) sulfonation product, characterized in that, for the purpose To increase the resolution, the photosensitive layer is made of silver bromide-silver emulsion containing silver iodide (3.0 ± 0.1) mol. microcrystal size silver halide

pBr 2.9 3.1, pH 6.7 7.3, ρ ^* = 1.2-1.4, which contains the pyridine salt of 3,3-di-γ-sulfopropyl-9-ethyl-5 as a spectral sensitizer , 5'-diphenyloxycarbocyanin betaine in the amount of (1.5 2.5) • 10 ^{- 3} g / g of metallic silver and additionally contains activator of spectral sensitization di-perchlorate 3.3 '- [1 ", 2" -bis (ethoxy) ethyl ] -bis- (1-ethylbenzimidazolium) in an amount of (1.2 - 3.2) • 10 ^-3 g / g of metallic silver or dithosylate 3.3 '- [1 ", 2" -bis (ethoxy) ethyl ] bis (1-ethyl 2-methyl-5-chlorobenzimidazolium) in an amount of (1.5 3.2) • 10 ^{- 3} g / g of metallic silver, and gelatin protivoreore The laminar counter layer contains (I) in an amount of (2.0 - 8.0) • 10 ^{- 2} g / g of gelatin, (II) in an amount of (2.0 - 7.0) • 10 ^{- 2} g / g of gelatin and additionally contains 4-chloro-4'-di (2-hydroxyethyl) amino-4 "-di (2-hydroxyethyl) ammonium triphenylmethane chloride in the amount of (2.0 5.0) • 10 ^{- 2} g / g of gelatin.

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