SU748333A1 - Colour inverted silver halide photographic material - Google Patents

Description

This invention relates to color reversible halide-silver photographic materials that can be used in the chemical photographic industry. A colored reversible halo-silver-silver photographic material is known, consisting of a substrate, an anti-aorol layer, a photosensitive Eoh of emulsion layers sensitized to different spectral regions and containing paint-forming components and a rhodium salt, such as rhodium chloride, filter and protective layers l. A disadvantage of the known material is that it has a high contrast ratio and low photographic latitude. Reducing the contrast ratio of the color image is achieved by treating the material in a color developer containing formazans, for example, 1- (M-sulfophenyl) -3-methyl-5-phenylformazan, i.e. A decrease in the contrast ratio is achieved by changing the conditions of chemical-photographic processing, which excludes the possibility of unification of the treatment processes for films of different properties and purpose. See page 2a. A decrease in the contrast ratio in this case is accompanied by a sharp drop in maximum densities. The aim of the invention is to provide a color reversible halogen-silver photographic material with a reduced contrast ratio of the color reversed image. The goal is achieved by the fact that the specified color reversible halide-silver photographic material consisting of a substrate, an anti-rosary layer, photosensitive emulsion layers sensitized to different spectral regions and containing paint-forming components and a rhodium salt, filter and protective layers in photosensitive emulsion layers additionally contains mercapto benzimidazole of the general formula

where R is H, SOjH, SOjNa; R - H, lower alkyl; R® is H, lower alkyl in the amount of 0.01-0.2 g per 1 kg of Emulsion.

The undoubted advantage of the proposed combination of additives is their efficiency when directly introduced into a photographic emulsion, which allows obtaining color reversible photosensitive materials with low or low contrast ratio values and increasing their photographic width without changing the mode of chemical-photographic processing and without reducing the maximum density value. .

Example 1. A color reversible film is manufactured with low contrast ratios (sample 1). On the triacetate or polyethylene terephthalate base, an anti-aorol sublayer, a red-sensitive (c.ch), green-sensitive (c.p.), filtering, blue-sensitive (c.ch.) and protective layers are applied. - In the emulsion of the redsensitive layer, containing RhCEj rhodium chloride at a rate of 0.006 mg / kg, in addition to common additives of a stabilizer, a tanning agent, a wetting agent and a polymethine panchromatic sensitizer, a mixture of aqueous alkaline solutions of the blue components, for example 2-methyl octadecylamino-5-sulfonate, is added. -2-naphthoic acid at the rate of 12 g / kg of emulsion, M- (3,5-dicarboxyphenyloctadecylamide) -1-hydroxy-2-naphthoic acid 12 g / kg and

2-mercaptobenzimidazole-5-sulfonic acid sodium salt. Substance A 0.05 g / kg emulsion.

Into the emulsion of the green-sensitive layer containing RhC at the rate of 0.06 mg / kg, in addition to the general irrigation additives (stabilizer, tanning agent, wetting agent, carbocyanine orthochromatic sensitizer), the purple component of 1- (4-phenoxy-3-sulfophenyl) -3- stearoylaminopyrazolon-5 at the rate of 10 g / kg and substance A at a concentration of 0.03 g / kg of the emulsion.

In addition to the stabilizer, wetting agent and tanning agent, the yellow component 3, 5-dicarboxyanilide 4-stearoylaminobenzoyl acetic acid in an amount of 15 g / kg and substance A at a concentration of 0.08 are introduced into the emulsion of the blue-sensitive layer containing RhCBj at the rate of 0.07 mg / kg. g / kg emulsion.

In parallel, a sample is prepared that does not contain RhCB in the emulsion, but containing A (sample II), and a sample with RhCPa but does not contain A (sample III).

Samples I, II, III are exposed in a sensitometer CS-2M light source with a color temperature of 3200-K and processed according to the development method with the inversion received for the CO-22 film, where a phenidone-hydroquinone developer is used as the first black-and-white film with halogen silver solvents.

The results of sensitometric tests of Samples i, II and III reversible films are given in Table. one.

T a

faces

10100,560,90,20 10,100,401,30,15 10,105,01,90,20 0-, 650,90,18 0,301,20,21 0,401,40,20 0,201,90,19 2,3 1,2 2., 3 -1,2. 2.3 1.35 2.1 0.75 2.08 0.75 2.50 0.60 2.03 -0.45

From the data table. 1 it follows that a sample of a color reversible film containing rhodium chloride in emulsion layers in combination with 2-mercapto-5-sulfobenzimidazole sodium salt (sample I), compared with samples containing only 2-mercaptobenzimidazole-5-sulfonic acid sodium salt ( sample II) or only chloride, rhodium (sample IG) has lower values of contrast ratio and greater photographic latitude; however, a decrease in the contrast ratio is not accompanied by a drop in the level of maximum densities.

Example 2. A colored reversible masked stick is made (sample IV). An anti-aorel colloid silver-colored sublayer, a red-sensitive, green-sensitive, blue-sensitive and protective layer is applied on a triacetate base.

In the emulsion of the red-sensitive layer containing RhCBj at the rate of 0.002 mg / kg, in addition to the general irrigation additives — stabilizer, wetting agent, tanning agent, polymethyl panchromatic sensitizer, blue-green filtranty dye, the components of 2-methyl octadecylamino-5-sulfanilide 1-hydroxy-2 are introduced - naphthoic acid at the rate of 18 g / kg emulsion, 2-methyl octadecylamino-5-sulfanilide 1-OXI-4- (2-chloro-4-oxyphenylazo) -2-naphthoic acid 9 g / kg emulsion mixed with K-butyl- 2-mercaptobenz-; imidazole (substance B) at the rate of 0.05 g / kg emulsion.

In the emulsion green-sensitive layer containing RhCB at the rate of

0.0015 mg / kg, in addition to irrigation additives, stabilizer, wetting agent, tanning agent, carbocyanine orthochromatic sensitizer, lilac filter dye, 1- (4-phenoxy-3-sulfophenyl) -3-stearoylamino-4- (2-chloro-3 4-oxyphenylazo) pyrazolone-5 (b, 5 g / kg emulsion), 1- (4-phenoxy-3-sulfophenyl) -3-stearoylaminopyroprazolone-5 in the amount of b g / kg emulsion and substance B from the calculation of 0.007 g / kg emulsion.

In addition to a stabilizer, a tanning agent and a wetting agent, an emulsion of the blue-sensitive layer containing a QHSE3 calculation of 0.002 mg / kg is administered with a component of 2- (3, 5-dicarboxyphenoxy) -5-carboxyanilide 4-stearoylaminobenzoyl acetic acid in an amount of 21 g / kg emulsion in a mixture with substance B at the rate of 0.05 g / kg emulsion.

In parallel, two more samples are made, one of them (sample V) contains in the emulsion layers only

25 substance B at a concentration of 0.05 g / kg of emulsion for each zonal layer of the other (sample VI) — only SLEECH in concentration on the zonal layers similar to sample IV.

30 Films are exposed in a sensitometer with a color temperature light source and treated as in Example 1.

The results of the sensitometric tests of samples of the color masked reversed film IV, V, VI are given in Table 2 (duration of black-and-white appearance 13 minutes, color 15 minutes).

table 2

It follows from the above data that a sample of a color reversible masked film (sample IV) containing RhCBg and N-butyl 2-mercapto-5-benzimidazole in emulsion layers has lower contrast ratios and a greater photographic width than sample V, containing only N-butyl-2-mercaptobenzimidazole-5-sulfonic acid and sample VI, containing only RhCEj in the emulsion layers.

Example 3. A color reversible film is made for shooting in daylight (sample VII).

On the triacetate or polyethylene terephthalate base, an anti-aorol colloidal silver sublayer, a redsensitive / green sensitive, filtering, blue sensitive and protective layer is applied.

In the emulsion of the red-sensitive layer containing ammonium chlorodate at a rate of 0.003 mg / kg, in addition to the stabilizer, wetting agent, tanning agent, panchromatic polymethyl sensitizer, the following components are introduced: 2-methyl octadecylamino-5-sulfanilide of 1-hydroxy-2-naphthoic acid at a calculation of 14 g / "g emulsion, octadecylamide 1-hydroxy-4-sulfo-2-naphthoic acid 14 g / kg of the emulsion in a mixture with the sodium salt of 2-mercaptomethyl bevimimidazole. 3, it follows that a sample of a film intended for shooting in daylight (sample VII) containing ammonium chlorodate and 2-methyl-mercaptobenzimidaeol-5-5-sulfonic acid (substance B) sodium salt in the emulsion layers (substance B) in: concentration 0.02 g / kg of emulsion.

In zelenochuvstBitelnogo emulsion layer containing ammonium hlorrodat rate of 0.05 mg / kg, besides stabilizers, wetting agents, tanning agents, orthochromatic carbocyanine sensitizer administered magenta component, such as 1- (4-phenoxy-W-sulfofeiil) -3-stearoilaminopirazolon- 5 in the amount of 10 g / kg emulsion mixed with substance B in a concentration of 0.02 g / kg emulsion.

In the emulsion of the blue-sensitive layer containing ammonium chlorodate at the rate of 0.05 mg / kg, in addition to the stabilizer, wetter, tanning agent, a non-diffusing component is introduced, as in example 1, at the rate of 15 g / kg emulsion with substance B at a concentration of 0.02 g / kg of emulsion.

In parallel, a sample containing only compound B in the layers (sample VIII) and sample IX containing only ammonium chlorodate are made.

The films are exposed in a sensitometer with a light source with a color temperature of 6500 ° K and processed according to the development process with the treatment as in Example 1.

The results of sensitometric tests of samples of color formed films VI I, VIII, IX are given in Table. 3

Duration of black and white appearance is 12 min., Color 10 min.

 L T a l and c a 3 -sulfonic acids have lower contrast ratios compared with sample V i I I, containing only the sodium salt of 2-methyl mercaptobenzimidazole-5-sulfonic acids,

ammonium hirrodat in emulsion layers.

Example 4. The manufacture of a colored reversible material is carried out as in Example 1, but instead of substance A, the zonal layers (C), (3) and (K) contain L-hexyl-2-mercaptobenzimidazole (compound D) in an amount of 0.03 g per 1 kg of emulsion (sample X) or 2-mercapto-6-imimidazole-5-sulfonic acid (compound D) in an amount of 0.08 g

1 kg of emulsion of each zonal layer (sample XI). In parallel, samples are prepared that do not contain CNSVs and do not contain compounds G and D (samples XII and XIII), and a sample with RhCPj, but not containing G or D (sample XIV).

Samples X-XIV are exposed and processed as in Example 1. The results of the sensitometric tests are shown in Table. four.

Tabli.tsa 4