DE1772955C - Dye diffusion transfer photographic process - Google Patents

Description

40,! OH

\ OH

The invention relates to a photographic dyeing _ J
diffusion transfer process for the production of far-

biger images in image receiving layers in which a 45
photographic recording material consisting of
consisting of a layer support and several sensitive to different areas of the spectrum
Silver halide emulsion layers and one with the

The silver halide of the silver halide emulsion layers 50 are relatively weak silver halide developers Contact standing dye developer, as well as bonds, even if they are at verferner if necessary, intermediate and / or top layer equally high pH values of the order of magnitude th, exposed, developed with an alkaline solution of about 13, which are necessary to carry out the process and brought into contact with an image receiving layer may be used. Further develop will. 55 such compounds have the sensitometric properties

It is known e.g. B. from the British patent shafts of the individual emulsion layers are not so 971, colored images by dye diffusion surprisingly that dye images are obtained whose to establish bearing. Here, pholographic density and contrast gradations are at least the same as recording materials are mixed with silver halide than when using other developer version layers and diffusible dye-developing bonds would be expected.

ler, d. H. Dyes that have a silver halide disadvantage in the known processes is thus

have a function, containing layers to ensure that the

drawing latent images in the silver halide borrowed color images in the high-light districts

emulsion layers exposed, with an alkaline high minimum density, furthermore a poor color saturation

I. (»Solution treated with an image receiving layer 65 and have poor contrast.

brought in contact. In the case of the action of the alkaline parts it is furthermore that in the case of the known

The solution will be the color images produced by the exposure, the color separation

latent images using the dye developer is too bad.

3 4

The object of the invention is to provide a dye diffusion material and an image-receiving layer by means of the ion transfer process, with which the gap formed by two rollers, the content of colored images with improved D _m , "values, of the container or containers evenly in the recording, better color saturation, improved Contrast and material distributed. The activator solution permeates the good color separation. 5 individual emulsion layers, in these

The invention was based on the knowledge that layers present latent image to a silver itself the problem can be solved by developing the image and the individual dye developers in the process can be immobilized in the presence of certain sulphurous developed areas. the containing organic compounds. Unreacted dye developer diffuses

The subject matter of the invention is based on an image-photographic dye diffusion transfer right from the individual emulsion layers to the image-receiving layer,
drive for the production of colored images in image receiving The optimal concentration of the layers to be used, in which a photographic recording sulfur compounds can be very different. The material, consisting of a support, is determined by a wide variety of factors, such as the composition of the light-sensitive spectrum of the sensitive silver halide emulsion material, the transfer time, the tempera layers and the silver halide of the door, for example the process is carried out, as well as silver halide emulsion layers in contact STE in the amount of between the photosensitive Mate Henden dye developers, as well as further gegebenen- rial and the image receiving layer for use gefails intermediate and / or top layers exposed, ^ a mounted developer solution influences.
developed with an alkaline activator solution and · Preferably, an alkaline solution brought into contact with an image receiving layer is used for development, which is about 1 to about 15 volume per unit, and is characterized in that one cent of dimethyl sulfoxide and / or 2,2'-thiodiethanol is used for development contains in the presence of dimethyl sulfoxide. The densities of transferred yellow and vind / or 2,2'-thiodiethanol performs. a ₅ purple dye images can be stronger

What is achieved by the invention is that the dyeing increases the density of the transferred blue diffusion transfer process colored images with green dye images. The sulfur-containing organic are improved in a particularly advantageous, particularly favorable D », m values with simultaneous changing Color saturation and color separation as well as compounds in concentrations from about 1 to about better contrast can be obtained. 30 6 percent by volume, based on the alkaline activator

The dye developers can be used in the silver halide solution.

The activator solution should preferably be strongly alkali.

beard layers must be included. be useful in order to increase the development activity of the dye

It is preferable to speed up the execution of the developer as much as possible. For this reason, the development materials used for development with superimposed gelatin activator solution preferably contain alkali metal hydroxides, emulsion layers used which, for example, sodium hydroxide or alkaline red, green or blue area of the spectrum, contain salts, for example sodium carbonate. She can ever be sensitive. The emulsion layers also include quaternary ammonium hydroxides or light-sensitive gelatin layers with subtractively volatile amines, such as diethylamine, decolorized dye developers, ie with blue-green ones. These compounds have the advantage that they are magenta or yellow dye developers if they are volatilized from the image receiving layers. The middle emulsion layer and its can. In this case the images do not contain an underlying dye developer layer, which is preferred alkali residues, which could be the reason for the two other emulsion layers to be set.
and their dye developer layers by intermediate The activator solution can be separated in a camera from layers, in particular gelatin intermediate layers, cleavable containers or by spraying or dipping. or roller coating process on the exposed

The dimethyl sulfoxide and / or the 2,2'-thiodi photographic recording material applied

Ethanol can optionally be combined with a 50. To carry out the method of the invention

Thickening agents, such as hydroxyethyl cellulose, cameras suitable for example are from the USA.

loose, in the alkaline activator solution, known in BiM patent specification 2 435 717,

receiving layer or in which the dye developer is responsible for carrying out the process of

The recording material used containing light-sensitive recording material can be conventional

material can be used. It is advantageous to contain 55 known dye developers,

the sulfur-containing compounds of the activator- Particularly advantageous dye developers are z. B.

solution incorporated. from Australian patent specification 220 279, the British

Recording material and image receiving layer table patents 804 971 and 804 973 as well as the

can form a unit. German Patent 1,036,640 known.

Advantageously, a photographic 60 Other suitable dye developers can be used in the Recording material can be used, the Belgian patents 554 935 and 568 344, in the structure described and by one or more British patents 804,974 and 804,975 in US Pat several frangible, with a viscous, alkaline French patent 1 168 292 as well as in the Activator solution-filled containers from one of the Canadian patents 577 021 and 579 038 would take of the dye images certain receiving 65 wrote.

layer, which is arranged on a support, the dye developers can separate the emulsion is. When the container or containers are broken open, layers or underlying layers are added z. B. in a camera, when performing on conventional procedures are incorporated. So they can

5 6

Dye developers in organic solvent layers, for example, should have the sensitivities of the individual solvents dissolved and adjusted in a binder solution, silver halide emulsion layers. B. gelatin solution, are dispersed. The colors, that a record of unwanted blue substance developers can be used to reduce their partial images in the emulsion layers, which are mainly in the red and green cup size, also together with a binder, 5 rich in the spectrum. B. a gelatin solution is prevented in a ball mill. In such a case it is possible to grind. Production of the Blue-Sensitive Emulsion Layers Particularly favorable results are obtained when silver bromide emulsions and a hydroquinone are used to produce the photographic recording material if one or more layers of the photographic other layers are silver chloride emulsions. In this case, it is expedient to contain instead of a derivative and the dye developers to be incorporated into the latin layers among or more dye developers due to a possible absorption capacity in the blue area of the emulsion layers in question. of the spectrum to the lowest, blue-sensitive The coating used for the production of dye developer layers, which have an undesirable filter effect, are likely to use the leuco bases mentioned,
Processing compositions are expediently prepared by: To prepare the individual layers, the dye developers can be used in high-boiling or customary known hydrophilic, organic, collosogenic crystalloidal solvents, such as the ideal binders. Particularly, for example, in the USA patents 2,322,027, partial results are described when using Aus-2,801,170 and 2,801,171, as obtained in the case of drawing materials, all of which are, for example, di-tetrahydrofurfuryl adipate or 2- (2-but- If the recording oxyethoxy ethyl acetate contains dissolved, the solution obtained contains intermediate layers of gelatin, then a gelatin solution should be incorporated and the resulting gelatin solution should be at least so thick that its thickness is roughly mixed in a colloid mill. 75% of the measured thickness of the yellow dyestuffs will then be particularly advantageous results, and at least about the same if the dyestuff developer contains twice the amount of gelatin in order to create a lower emulsion layer, the sensitivity of which is the desired migration of the dyestuff developer and complementary to the color of the Dye developers are those in which development products are incorporated from one layer to the next. To prevent another shift
The process of the invention is preferably achieved in the presence of a practically colorless hydroquinone mixed package system in which the derivative in question and / or an onium compound, for example a dye developer, is in a template It contains a heterocyclic, quaternary ammo can, the partial compound containing silver halide crystals, which in alkaline solution quenches or surrounds grains. 35 borrowed methylene base is carried out. In the case of multilayered photosensitive photographic hydroquinone derivatives and onium compounds, the various sensitive silver halide emulsion layers borrowed, for example, in German Palentschriften 1157479, can be arranged on the carrier and 1 168 678 as well as in the USA patents in such a way that the red 3 253 915 and 3 66 894. The use-sensitive layer rests directly on the support, 40 formation of onium compounds, which in alkaline solution is farthest away from the support, especially in the presence of the hydroquinone, and the green-sensitive layer between derivatives between the individual graphic recording material of the photosensitive layers described cannot diffuse diffuse type, an increase in the filter dyes, which at the same time color transfer Aging of the dye developers from the non-forming agents can be accommodated. Thus, exposed areas of the negative can be reached while, for example, a yellow dye, such as, for example, the transfer of the oxidized dye developer described in U.S. Pat. No. 2,983,608 from the exposed areas, is inhibited. As a result, coupler B, in which between the blue or green, the high lights of the copy can be improved, the sensitive emulsion layer is present, while a purple-red color, if quaternary ammo is used as onium compounds or color former can be accommodated between the green or rotnium compounds with a five-weight nitrogen-sensitive layer. atom used. Such compounds are described in the case of filter dyes which are also color formers, for example in German Patent 1157 479, for the layer in question according to any conventional 55.

Process, for example according to those in the USA. Preferably, the onium compound is used in the Patents 2 304 939,2322027,2801170,2 801171 alkaline activator solution and / or the image and 2,949,360 methods incorporated into the receiving layer are applied. The becoming. These dyes can also be stained; in contrast, droquinone derivative is preferred for example with a mordant of the type described in FIG. 60 in one of the layers of the photosensitive United States patent 2 882 156 of the type described. Drawing material, such as a deck die Arrangement of the individual photosensitive layer, an emulsion layer, a dye layer a reverse wrapping layer or an intermediate layer can also be used on the carrier, den, so that, for example, the blue-sensitive emulsion layer can also be used in the image-receiving layer to be closest to the wearer comes to hand. Thus, the image receiving layer can and the rolling emulsion layer, for example, a mordant for the dyestuffs removed from the carrier) is arranged. With a lcr, e.g. B. ΡοΙγ-4-vinylpyridine, and hydroquinone derivative such arrangement of cin / clncn photosensitive ;! and also, if necessary, one of the

mentioned onium compounds, in particular one can be. Here, however, it is also possible that those capable of forming methylene bases, hetero- between the image receiving layer and the others cyclic, quaternary ammonium compounds ent- layers to make it easier to wipe them off. The viscous, alkaline If necessary, it can be advantageous for the dissolution to be added in the manner described Drawing material and / or the alkaline acti- vities.

vator solution and / or the image-receiving layer a If one of the layers already contains alkali,

Antifoggants and optionally also in the, the supplied activator liquid can only be from Image-receiving layer consists of a development-inhibiting aqueous solution that is designed to be released Connection to use. io of the alkali is used.

Is the development-inhibiting compound The silver halide of the silver halide emulsion

instead of layers in the photographic light-sensitive material of the material used in the method of the invention in the treatment solution in the image receiving material can be from one of the layer, it will not be effective for so long, usual silver halides or mixtures thereof, until it is dissolved in the activator solution and during 15 such as silver bromide, silver bromoiodide or the development of the recording material, silver chlorobromide, existed. To make the Madert is. This means that the latent image can evolve very quickly. Negative emulsions are usually entangled. while the development inhibitor turns, although also with direct positive emulsions, Effect is delayed until the development of the d. H. for example with a reduction and gold exposure Districts essentially at the end of 20 emulsion sensitized in the British Palentge Commission is. Only then does a noteworthy font 723 019 described type, an emulsion, Inhibition or development takes place. This makes their silver salt crystals from a water-insoluble one Development of the unexposed areas prevented and silver salt core and one from a veiled, thus the extent of dye developer transfer to water-insoluble silver salt that occurs without exposure increased. · 25 silver developed, existing shell are built up.

An additional improvement can be achieved, for example, as described in the United States patent when the development inhibitor compound is described 3,367,778, or directly positives in the image receiving layer and the said quater emulsions from the Belgian patent natural salts in the treatment solution and / or of the 695,366 known type, excellent results Image receiving layer are included. Suitable ones which can be obtained.

Development-inhibiting compounds are hetero- When using a direct positive emulsion

cyclic mercaptans, such as, for example, mercapto, give a negative dye off transfer image tetrazoles and mercaptobenzothiazoles, e.g. B. 1-phenyl from transferred dye developer and a posi-5-mercaptotetrazole or 2-mercaptobenzothiazole. tive image from untransferred dye developer,

According to a further advantageous embodiment, when the silver image is bleached, form of dye diffusion transfer process It can also be used for radiographic purposes

According to the invention, the alkaline activator contains certain recording materials are used, solution and / or the image receiving layer in known In this case it contains a so-called X-ray manner small amounts of a silver halide solution intensifying screen, which is coated with the marking agent, such as an alkali metal or 40 material form a unit and either over or Ammonium thiosulfate or thiocyanates. As a result, under the emulsion and dye developer layers the effective photographic sensitivity can be arranged. The reinforcement layers can speed of the dye diffusion transfer process a phosphor, e.g. B. barium lead sulfate or lead oxide, increase even more according to the invention. The influence in a suitable binder, such as of the silver halide solvent is particularly favorable to an alkylacrylate-acrylic acid mixture, distig if the process contained at the same time in the presence of spergiert.

of a hydroquinone derivative and / or an onium die in the context of dye diffusion transfer

connection is carried out. application method according to the invention used

When processing recording materials of the drawing materials, the usual known type described or of photographic recording 5 ° contain additives, z. B. those in French patent drawing materials of the additives described in U.S. Patent Specification 1,205,755. 3,227,551 type described in the presence of urine- The following examples are intended to illustrate the process of

Substance, aromatic sulfonic acids, such as illustrate the invention in more detail. Naphthalene-US disulfonic acid, and aromatic car-.

Bonic acids, such as salicylic acid, can be found in Examples 1 and 2

the color density of the images obtained often still.

improve further. These additives can be made by adding to a gelulose treatment solution of the preparation material as well as the image receiving layer acetate support with an adhesive layer of hardened or incorporated into the recording material. Gelatin has been applied in the following layers:

In the context of a dye diffusion transmission 60 _ . , ...

The method according to the invention, up to ^A · Blaugrun dye developer layer

Drawing materials are used in which an aqueous gel solution with the blangriment

the emulsion layers with adjacently arranged winder 1,4-bis-IjS - {2'S- dihydroxyphenyD - propyl-hydroquinone derivatives as well as dye developer amino] -anthrachnKm were in a mixture of layers to form a unit with a support, 65 Nn-butylacetanilide, 4-methykyc ] ohexanot} and one of the usual dispersants capable of absorbing the dye developer (sodium prophylaxis. The support is designed in such a way that lhaline sulfonate) is dispersed. The resulting mixture was stripped from the photosensitive layers and passed several times through a colloid mill

then applied to the cellulose acetate layer support in such a way that about 22.6 mg of cyan dye developer and 26.9 mg of gelatin were used ^{per dm 2 of support area.} It was then dried to remove the 4-methylcyclohexanone.

B. Red sensitive emulsion layer

A gelatin-silver bromoiodide emulsion sensitized to the red region of the spectrum was applied to the cyan dye developer layer in such a way that about 29.3 mg of silver and about 21.7 mg of gelatin were used ^{per dm 2 of support area.}

C. Interlayer

A gelatin intermediate layer containing 4'-methylphenylhydroquinone was applied to the red-sensitive emulsion layer B in such a way that about 26.9 mg of gelatin and about 0.9 mg of 4'-methylphenylhydroquinone were used ^{per dm 2 of support surface.}

20 D. Magenta dye developer layer

An aqueous gelatin solution with the magenta dye developer 2 '- [p- (2', 5'-Dihydroxyphenäthyl) -phenylazo] -4-n-propoxy-1-naphthol was in a mixture of cyclohexanone, Nn-butyl acetanilide and * 5 a Dispersing agent (sodium triisopropylnaphthalene sulfonate) dispersed. The mixture obtained was passed several times through a colloid mill and then applied to the intermediate layer C in such a way that 8.3 mg of gelatin 3 <j and 8.3 mg of the magenta dye developer were used ^{per dm 2 of support surface.} The resulting layer was then dried to remove the cyclohexanone.

E. Green sensitive emulsion layer

A green-sensitive silver bromoiodide emulsion was applied to the magenta dye developer layer D in such a way that about 11.6 mg of silver and about 8.6 mg of gelatin were used ^{per dm 2 of support surface.} F. Interlayer

Applied in such a way that about 5.9 mg of silver and about 4.4 mg of gelatin were used ^{per dm s of support surface.}

I. Top layer

Finally, a gelatin emulsion containing 4'-methylphenylhydroquinone was applied to the blue-sensitive emulsion layer H in such a way that about 4.3 mg of 4'-methylphenylhydroquinone and about 10.8 mg of gelatin were used ^{per dm 2 of support surface.}

The gelatin layer containing the 4'-methylphenylhydroquinone was prepared according to the US Pat 3 146 102 processes described.

Fresh samples of the recording material were filtered through red, green and blue filters under a step wedge exposed and then moistened with the activator solutions given in Table 1.

Table 1

High viscosity hydroxyethyl

cellulose

Sodium hydroxide

Benzotriazole

1-benzyl-2-picoliniiimbromide

Dimethyl sulfoxide

Sodium thiosulphate 5 H ₂ O ..

example 1

(Comparative j 2 example) j Volume percentage

3.5
4.5
2.0
2.0

0.8

3.5 4.5 2.0 2.0 4.0 0.8

A second intermediate gelatin layer was applied to the green-sensitive emulsion layer D in such a way that about 21.5 mg of gelatin and about 1.1 mg of 4'-methylphenylhydroquinone were used ^{per dm 2 of support surface.}

G. Yellow Dye Developer Layer

An aqueous gelatin solution with the yellow color developer 1-phenylO-Nn-hexyicarboxyamido-4- [p-2 ', 5'-dihydrophenethyl) -phenylazo] -5-pyrazolone was in a mixture of ditetrahydrofurfuryl adipate, ethylene glycol monobenzyl ether ( Sodium triisopropylnaphthalene sulfonate) dispersed. The obtained mixture was passed through a colloid mill several times. The dispersion obtained was allowed to settle with cooling, washed to remove the ethylene glycol monobenzyl ether and applied to the second intermediate layer F in such a way that about 5.4 mg of gelatin and about 5.4 mg of the yellow dye developer were used ^{per dm 2 of carrier area.} The layer obtained was then dried.

65 H. Blue sensitive emulsion layer

A blue-sensitive silver bromoiodide emulsion was applied to the yellow dye developer layer G. During wetting with the activator solutions, the exposed samples of the recording material were located with an image receiving material consisting of a white-pigmented cellulose acetate base and an image receiving layer made of polyvinyl alcohol applied as a mordant and containing poly-4-vinylpyridine , in contact. The activator solutions were applied to the exposed recording Miiaienaiieii with a roller pack of 0.11 mm (which also corresponded to the thickness of the activator layer). The cyan, magenta and yellow dye developer images were transferred from the undeveloped areas onto the respective image-receiving layers. After about 2minutiger development at a temperature of about 22.2 ⁰ C, the image-receiving layers were separated with the Farbstoffentwicklerbfldern of the exposed recording materials. The densities of the dye images were then measured using red, green and blue filters.

Using the actuator solution of Example 2 resulted in significantly higher yellow and magenta maximum densities obtained than when using the actuator solution of Example 1. The measurement results obtained are given in Table 5 below.

Examples 3 and 6

Another recording material was produced as described in Examples 1 and 2, however except that the concentrations of each Components have been changed as follows:

A. Cyan Dye Developer Layer

The cyan dye developer solution of Examples 1 and 2 was applied to the support in such a way that about 24.1 mg of cyan dye developer and 26.9 mg of gelatin were used ^{per dm 2 of support area.}

B. Red sensitive emulsion layer

The red-sensitive gelatin-silver bromoiodide emulsion layer was applied to the cyan dye developer layer in such a way that about 29.3 mg of silver and about 21.7 mg of gelatin were used ^{per dm 2 of support surface.}

C. Interlayer * ⁵

The gelatin intermediate layer containing 4'-methylphenylhydroquinone was applied to the red-sensitive emulsion layer C in such a way that about 1.1 mg of 4'-methylphenylhydroquinone and about 26.9 mg of gelatin were used ^{per dm 2 of support surface.}

D. Magenta dye developer layer

The aqueous gelatin solution with the purple dye developer of Examples 1 and 2 was applied to the intermediate layer C in such a way that about 9 mg of purple dye developer and about 8.3 mg of gelatin were used ^{per dm 2 of support area.}

E. Green sensitive emulsion layer

The green-sensitive emulsion layer was applied to the magenta dye developer layer D in such a way that about 11.6 mg of silver and about 8.6 mg of gelatin were used ^{per dm 2 of support area.}

45

F. Interlayer

The second gelatin intermediate layer containing 4'-methylphenylhydroquinone was applied to the green-sensitive emulsion layer D in such a way that about 1.1 mg of 4'-methylphenylhydroquinone and about 21.5 mg of gelatin were used ^{per dm 2 of support surface.}

G. Yellow Dye Developer Layer

The gelatin aqueous solution containing the yellow dye developer of Examples 1 and 2 was made in the manner applied to the intermediate layer F that per dm * support area about 5.4 mg of the yellow dye developer and about 5.4 mg gelatin accounted for.

H. Blue sensitive emulsion layer

On the yellow dye developing layer G, the blue-sensitive silver bromoiodide emulsion layer was applied applied in such a way that per dm * support surface about 5.9 mg of silver and about 8.8 mg of gelatin were used.

I. Top layer

The gelatine containing 4'-methylphenylhydroquinone was applied to the blue-sensitive emulsion layer H top layer applied in such a way that about 5.3 mg of 4'-methylphenyrhydrochmone per dm * support surface and about 5.4 mg gelatin accounted for.

55

Fresh samples of the recording material obtained were described in Examples 1 and 2 Wise exposed and developed, but with the exception that the transfer time is 1.5 minutes took. The composition of the activator solutions used in these Examples 3 to 6 is in in the following table 2:

Table 2

High viscosity hydroxyethyl cellulose

Sodium hydroxide

Benzotriazole

l-benzyl-2-picolinium bromide

Sodium thiosulfate · 5H ₂ O

Dimethyl sulfoxide

example

3 4.5

Volume percentage

3.5 3.5 3.5 4.0 4.0 4.0 2.0 2.0 2.0

2.0 0.8

2.0
0.8
5.0

2.0

0.8

10.0

When using the activator solutions of Examples 4, 5 and 6, considerably higher yellow values were obtained Magenta densities than obtained when using the activator solution of Example 3. The density values are given in Table 5 below.

Slightly higher yellow and purple densities were obtained with the activator solution of Example 6, if Transfer times of 2 minutes were used. The cyan density decreased with a longer transfer time strong too.

Examples 7 to 9

According to the method described in Examples 1 and 2, another recording material was produced produced, but the concentrations of the individual components were again changed.

A. Cyan Dye Developer Layer

A cellulose acetate support provided with a subbing layer was coated in this manner with one of the Coated aqueous gelatin solution containing cyan dye developer of Examples 1 and 2, 5 »that about .12.9 mg of dye developer per dm * of support surface and about 15.2 mg gelatin accounted for.

B. Red sensitive emulsion layer

On top of the cyan dye developer layer A. became the red-sensitized bromoiodide emulsion layer Applied in such a way that about 21.5 mg of silver and about 16.7 mg of gelatin were used per dm * support surface.

C. Interlayer

On the red sensitive silver halide emulsion layer B became the 4'-methylphenymydroquinone containing Gelatin intermediate layer applied in such a way that about 0.5 mg of 4'-methylphenylhydrochnion per dm * support surface and about 16.1 mg gelatin accounted for.

D. Magenta dye developer layer

The aqueous gelatin solution with the magenta dye developer was applied to the intermediate layer C in such a way that about 8.3 mg of the magenta dye developer and about 8.3 mg of gelatin were used ^{per dm 2 of support area.}

E. Green sensitive emulsion layer

The green-sensitive silver halide emulsion layer was applied to the magenta dye developer layer D in such a way that about 11.6 mg of silver and about 8.6 mg of gelatin were used ^{per dm 2 of support area.}

F. Interlayer

The second intermediate gelatin layer containing 4'-methylphenylhydroquinone was applied to the green-sensitive silver halide emulsion layer E in such a way that about 1.1 mg of 4'-methylphenylhydroquinone and about 12.9 mg of gelatin were used ^{per dm 2 of support surface.}

G. Yellow Dye Developer Layer

The aqueous gelatin solution containing the yellow dye developer was applied to the intermediate layer F in such a way that about 5.4 mg of the yellow dye developer and about 5.4 mg of gelatin were used ^{per dm 2 of support surface.}
H. Blue sensitive silver halide emulsion layer

The blue-sensitive bromoiodide emulsion layer was applied to the yellow dye developer layer G in such a way that about 4.4 mg of gelatin and about 5.9 mg of silver were used ^{per dm 2 of support surface.}

1st top layer

The gelatin layer containing 4'-methylphenylhydroquinone was applied to the blue-sensitive silver halide emulsion layer H in such a way that about 1.7 mg of 4'-methylphenylhydroquinone and about 1.7 mg of gelatin were used ^{per dm 2 of support surface.}

Fresh samples of the recording material were exposed in the manner indicated in Examples 3 to 6 and moistened with the activator solutions given in Table 3 below. That used The image receiving material consisted of a white-pigmented cellulose acetate support with one as a mordant Poly-4-vinylpyridine and l-phenyl-5-mercaptotetrazole containing gelatin receptor layer.

Table 3

High viscosity hydroxyethyl cellulose

Sodium hydroxide

Benzotriazole

l-benzyl-2-picolinium bromide.

4-hydroxypropyl-1-phenethylpyridinium bromide

2,2'-thiodiethanol

Dimethyl sulfoxide

example

7 j 8 I <volume percent

3.5 4.5 2.0 0.5

1.5

3.5 4.5 2.0 0.5

1.5

- I 4.0

- I -

The advantages that result from the method according to the invention can be seen from Table 5.

Examples 10 and 11

Fresh samples of the recording material described in Examples 7 to 9 were in the exposed and developed in the manner described. The image receiving material used in Examples 1 to 6 described image receiving material is used.

The transfer time was 1.5 minutes. The temperature was 22.8 ° C. The activator solutions used had the compositions given in Table 4 below:

₃₀ Table 4 example
10 Π
Volume percentage 3.5
4.5
2.0
2.0
0.8
2.0 3.5
4.5
2.0
2.0
0.8
2.0
4.0 35 High viscosity hydroxyethyl cellulose ..
Sodium hydroxide
Benzotriazole l-benzyl-2-picolinium bromide
• sodium thiosulphate
♦ ° Tetramethylammonium chloride
Dimethyl sulfoxide

The density curves resulting from the reflection densities of the transferred step wedge images show that

when using the activator solution of Example 10, which contained 4.0 percent by volume of dimethyl sulfoxide, im Compared to the activator solution of Example 11, higher maximum densities of the transferred yellow and magenta dyes can be obtained.

The density values obtained in Examples 1 to 11 are shown in Table 5 below:

Table 5 example

yellow

Purple Blue green

<Wb purple red

Blue green

I (comparative example.
2

3 (comparative example).

4th

5

6th

7 (comparison bet game).

s;

9

10 (comparative example)

II

2.50

1.91
2.16

2.62
2.62
3.00

2.80
2.66

1.96
23

1.50
1.95
1.90
2.08

2.13

2.61

2.10 1.96
1.96

1.46
1.46
139
1.38

2.42
2J2 &
2.46

1.82
1.90

Ό, 18
0.21

0.19
0.21
0.26
0.28

0.19
0.20
0.21

0.21
0.21

0.15 0.18

0.16 0.18 0.20 0.24

0.14 0.16 0.15

0.18 0.18

0.14 0.16

0.16 0.18 0.20 0.22

0.16 0.15 045

0.1 «0.18

Claims (4)

1 2 silver images developed. During the development of the patent claims: silver images in situ resulting oxidation products of the dye developers are in the binders of the 1. Photographic dye diffusion does not transfer individual emulsion layers or only slightly generation process for the production of colored images in 5 diffusible. As a result, only those won't Image receiving layers in which a photographic. oxidized, different images in the emulsion layers Recording material, consisting of a divided dye developer with the formation of a positive layer support, several, compared to different tive images by diffusion on the image receiving areas of the spectrum's sensitive silver layer. halide emulsion layers and one with the io becomes a photographic recording material Silver halide of the silver halide emulsion with variously sensitized silver halide emulsion layers dye removal layers in contact, which are in the individual emulsion layer curlers, and also optionally intermediate or adjacent emulsion layers in these and / or top layers, exposed, dealalkaline with dye developers subtractively colored with one layer Developed activator solution and held at 15, used, so multicolored images become one Keep the image receiving layer in contact. is characterized in that the success of the procedure depends at least in part the development in the presence of dimethyl depends on the degree to which the dye sulfoxide is present and / or 2,2'-thiodiethanol. developer in the exposed, d. H. negative districts 2. The method as claimed in claim 1, characterized in that the emulsion layers are developed into one indicates that an alkali non-diffusible form is transferred for development. Contains lische solution used, the about 1 to about 15 V- a high lights corresponding to a template, lum percent dimethyl sulfoxide and / or 2,2'-thio- fully exposed negative area not yet oxidized diethanol, optionally one to form a dye developer, so these are simultaneously with diffusible methylene base Capable of heterodyning unreacted dye developers of the Pocyclic, Quaternary ammonium compound and sitivbezirke transferred to the image receiving layer optionally contains hydroxyethyl cellulose. and lead there, d. H. in the color picture, at a high 3. The method according to claim 1, characterized ge minimum density. indicates that a recording material Typically known dye developer, as used, which forms with the image receiving layer a, for example 1,4-bis [0- (2,5-dihydroxyphenyl) ethyl unit, and that between recording amino] - anthraquinone of the formula:
material and image receiving layer at least one breakable container is arranged, which holds the alka-OH lic activator solution contains. \ 4. The method according to claim 1, characterized in that 35 shows that the image-receiving layer is dimethyl- ° NHCH ₂ CH ₂ - ,, contains sulfoxide and / or 2,2'-thiodiethanol. ! In