DE2165122A1 - Photographic material for the production of black and white or color images - Google Patents

Description

DR.ING.F.WTTESTIIOFF 8 MUNICH 90

DIPIi. ING. G. PULSE SILENCE HATE 2

DR.ETPECHMANN ._ tilifox (0811) 68 20 51

DR. ING. D. BEHRENS 2165122 tsisobamms ι PATENT ANWiME 'ηοτιοτρΛΤίη münohsh

1A-40 685

Description of the patent application

Polaroid Corporation 730 Main Street, Cambridge, Massachusetts, U.S.A.

concerning
Photographic material for the production of black and white or color images

The invention relates to a photographic material for the production of Black and white or color images, it being possible for development to take place in the presence of actinic light.

There are a wide variety of photographic systems for forming copies or prints by diffusion transfer processes known. At this time, a developable image is generally formed within a photosensitive recording material built and developed this. There is an image-appropriate distribution of image-forming substances depending on the Development, which is then transferred to the image-receiving layer arranged above it, thus creating the desired transfer image therein is being built. The image-receiving layer can be separated from the recording material, for example if it is on is attached to a carrier ^ or it can be on the same carrier are present and thus remains together with the photosensitive layer or layers.

The invention is now directed to such film units for development in the presence of actinic light, i.e. outside of it

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The camera is especially on so-called © "integral negative, positive film units ¹ · for the division of color transfer images.

Such film units generally comprise a plurality of essential layers including at least one light-sensitive sirber halide layer with associated: dye image-forming Material and a dyeable layer. These essential layers can «I on a transparent,. dimensionally stable Carrier in close proximity to the; dyeable layer are located »Opacifiers can be on one side the photosensitive layer are provided so that the.

\ Film unit can be developed in the light to build up the desired color transfer image. In a particularly preferred embodiment, such opacifiers provide an opaque, dimensionally stable support on one side of the photosensitive layer, specifically opposite that of the dyeable layer, to prevent exposure to actinic light from this side onto the film unit. An opacifying substance can be applied between the colorable film and the recording material during development, for example by having this substance in the developer. This prevents subsequent exposure and thus fogging due to incident actinic radiation from the other side of the film unit . if

* the exposed film unit is developed in the light.

While the transfer images that can be obtained with the film unit according to the invention are from the remaining layers the film unit can be separated after development, the particular interest lies in such integral negative-positive film units, whose transmission images can be viewed as reflection copies without being separated.

An example of integral negative-positive film units for making dye transfer images without separation of the rest of the film unit as a reflection copy

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can be go from U.S. Patents 3,415,644, 5 415 645, 3 415 646, 3 473 925, 3 594 164 and 3 594 165 and the older registrations USSN 782 056 and 782 075 from 1969 as well 65 084 from 1970. '. .

The above-mentioned film units are exposed to light, whereby a developable image is obtained. This is developed by applying a developer composition, whereby the exposed silver halide as a function of development leads to an image-correct distribution of diffusible material producing a fabric image, which is then transferred at least partially by diffusion into the dyeable layer in which the desired color transfer image is built up is, for example, a positive image. All of these systems have in common that a reflective layer is provided between the dyeable material and the photosensitive recording material to effectively mask the latter and to form a background for viewing the color image within the dyeable layer Consider separation from the other layers or elements of the film unit. In some of these systems, this reflective layer is already provided before exposure, e.g. as a pre-formed layer within the essential layers of the film unit or in other cases at any other time afterwards, e.g. in form a light-reflecting agent, such as a white pigment, in particular titanium dioxide ₄ within the developer composition, which is used between the dyeable or image-receiving layer and the closest layer in the development of the latent image and the build-up of the transfer image.

These processes generally use a dye image constituent substances of known substances from the usual diffusion transfer processes, which either 1. initially soluble and diffusible in the developer, but not selectively diffusible as a function of development,

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or 2. Initially insoluble and non-diffusing in the developer mase are, however, can be made selectively diffusible as a puncture of development. These substances can be used as complete dyes or dye intermediates e.g. Color couplers are available. "

Examples of initially soluble and diffusible substances and their application in color diffusion transfer processes can refer to U.S. Patents 2,647,049, 2,661,293, 2,698,244,

2 698 798, 2 802 735, 2 774 668 and 2 983 606. Examples of diffusion transfer systems using initially non-diffusible substances are described in US Patents 3,443,939, 3,443,940, 3,227,550, 3,227,551,

3,227,552, 3,227,554, 3,243,294, and 3,445 "228 included.

All these systems have in common that the structure of the color transfer image on different mobility or Diffusibility by chemical action is based on the development. This chemical action can, for example be a redox reaction or a coupling reaction.

Other systems using other reactions are known, e.g., selective build-up or breakdown of the dye.

In all of these systems, multicolored images are also obtained Using a film unit that selectively sensitized at least two Silver halide layers each associated with a dye image-forming component. Material of the desired spectral properties contains. The so-called "Trlpaalcs", in which blue, green and red sensitized people are used, are most frequently used Silver halide layers with associated yellow, purple and blue-green dye image forming material.

A system for the production of Color images after diffusion3 transfer process (USA patent

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script 2,983,606) using developer dyes, which are dyes that are able to develop silver halide. In these systems, the developer dyes also represent the dye-image-forming materials. Such a system comprises a photosensitive recording material of at least one silver halide layer with an associated developer dye (in the same or in an adjacent layer) and is developed by applying an aqueous potassium treatment composition or liquid. Exposed and developable silver halide is developed by the developer dye, which in turn is oxidized and provides an oxidation product which is noticeably less diffusible than the unconverted developer dye, so that an imagewise distribution of diffusible developer dye in the unexposed areas of the silver halide emulsion layer is obtained, which is then at least partially is transferred by diffusion to a dyeable image-receiving layer in which the positive dye transfer image is built up. Multicolored images are obtained with a recording material containing two or more selectively sensitized silver halide layers with associated developer dyes ( ^M Tripaok "US Pat. No. 2,983,606).

With the above systems and development under the influence of. _{It was} possible to determine from light that the use of an opacifier in the developer mass is necessary. This opacifying agent can be the above-mentioned reflective agent or another substance or a mixture of substances which, in combination with the reflective agent, produces the necessary opacity in order to create a sole protection through incident actinic radiation, see B. through the transparent question _; avoid using the light when developing the film unit *

In the case of a particularly expedient system for starting the development, the treatment liquid is exposed to the

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unit applied while pulled out of the camera will. This can easily be done in that the developer composition contains an opacifier and is in a destructible container known type is located on the leading edges of the film unit is arranged and when pulling out the film unit its " Contents evenly distributed between the appropriate layers. A pair of rollers is suitable for this in a known manner.

In this process, the film unit to the light, the opacifying agent-containing processing composition distributed so at withdrawal that fogging is prevented by incident actinic radiation on the respective layers of the film unit "However, it was found that Θ3-called because of the sometimes referred to as" light pipe ¹¹ Phenomenon that haze occurs on the hand areas of the film unit, these are the parts that are last pulled out of the camera Camera, so that the part of the film unit to which the developer tape has not yet been applied is unprotected against it.

In order to explain this phenomenon further, a film unit should be exposed in a camera and then drawn very slowly out of the camera to the light between a pair of pressure rollers. If the film unit is pulled forward so slowly, the developer compound is slowly distributed so that the part outside the camera is covered with developer compound and is thus protected by the opacifier, while the part that is still in the camera has not yet received any developer compound and is therefore not protected except, of course, from the fact that he is slob nooh always in the thick of the camera. While on the part of the film unit that is already outside the camera, noticeable lioht does not lead to the formation of soles, "nn mxf the part that is nooh in the camera" in lioht

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turn around
in scattered or re flexion / or diffuse penetrate via the edges along / uer film unit _t making it to a post-exposure and ^ chieierbildung in these parts, which are still within the camera, comes as no Entwioklermasse is applied.

Although the above explanation has been illustrated by slowly pulling out the film unit from the camera Obviously, because of the high speed of light, there is no mechanical system to pull out the film unit fast enough, in order to avoid the formation of fog as a result.

The invention has set itself the task of solving this problem to solve.

According to the invention, the potential fog problem outlined above is prevented by applying a pigment-containing layer the side of the recording material is provided on which the developing agent containing opacifying agent is applied. The pigment-containing layer is characterized by a Content of a pigment dispersed therein to ensure transmission of visible light over the edges to unprotected parts of the To prevent recording material, i.e. to eliminate the problem of "light conduction" set out above however not sufficient to essentially completely prevent transmission. The pigment-containing one according to the invention Layer solves the above problem in such a way that the recording material is prevented from fogging by incident light from one side is protected by applying a layer of developer liquid with the help of the opacifier contained therein and dj, e so-called fogging is prevented by light conduction through the .pigment-containing layer. The inventive photographic Materials are further characterized by their opacity, e.g. an opaque layer on the side of the Recording material is provided opposite to that

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to which the developer compound is applied. In this way, the film unit can be developed in the light.

The invention "thus relates to photographic materials for manufacture diffusion transfer images wherein a layer of an opacifying agent is applied to the film unit when .this is drawn to the light. This layer of opacifying agent is sufficient to prevent fogging from falling To prevent light.

The invention can be applied to film units having a plurality of essential layers including an image receiving layer to build up a diffusion transfer image on a dimensionally stable support, and which can be changed by the application of an opacifier during development can develop in the presence of actinic radiation. Both photomaterials according to the invention, one or more layers are provided on the side of the recording material .to which the opacifying agent is applied, namely one or more layers of a pigment, which above type of fogging allowed to prevent.

According to the invention, several measures are taken, the relationship and consequences of which are set out below in particular with reference to the figures.

1 and 2 show cross-sections on an enlarged scale of the essential parts of the exposed parts according to the invention Photographic materials during development as the photographic material passes between pressure rollers.

3 and 4 show cross sections of the invention Photographic materials, and

FIGS. 5 and 6 show other embodiments of the invention Photographic materials.

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Based on the development of pilm units constructed in this way supposed this type of fogging with reference to the pig. 1 and 2 are explained. After Pig. 1 includes the pilm unit a transparent support 100, an image receiving layer 120, in the diffusion transfer image after application of the developer race 140 is built up between the layers 120 and the recording material 160. In the case of the recording material 160 for example, it may be a photosensitive gelatin-silver halide emulsion layer act on a carrier 180, which is preferably opaque. When the pilm unit between the rollers 200, 400 passes, the developer compound 140 is between the

then layers 120, 160 distributed, it exits the camera. the Developer compound contains an opacity system.

Photographic materials of this construction are known (USA patents 3'415 644.3 415 645, 3 415 646), which means

Produce Parbbilder on an image receiving layer and see them in the light through a transparent, dimensionally stable carrier las sai. With some of these well-known Materials, the recording material is exposed through the transparent support. Pollich is the transparency of such Layers are an essential factor for such photographic materials, which affect the overall quality of the image as one can see it through this Layers can see, and in some cases also on the overall quality of the image obtained by exposure can be of influence.

In the photographic materials according to the invention according to Pig. 2 contains the developer compound for the essential elements Turbidity system. This is between the transparent carrier 100 and Recording material 160 distributed. The opaque carrier 150, permeable to one, can be designated as essential layers Diffusion transfer image between recording material 160 and image layer 120, which is on a second dimensionally stable Carriers (not shown) may be located (United States patents

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3 »594 164 and 3 594 165). It should be noted that the The transmittance of the layer 1CD is an essential factor because normally the recording material 160 through the carrier 100 is exposed and consequently the property directly Influence the quality of the image built up in the image layer 120.

As already mentioned, the photographic materials according to the invention additionally comprise a pigment-containing layer for prevention of light penetrate to parts of the recording material that are still in the dark in the camera and for a are not protected by the turbidity system for a short time, fe The fiction, contemporary pigment-containing layer in conjunction with The above photographic materials provide an effective solution to the problem of potential fogging due to the unique nature of the Structure of the photographic materials according to the invention and / or the type development.

In the case of the formation of fog in question it is a question of the fact that a light incident on the parts of the transparent Layer 100 takes place outside the camera and from there to the parts of the exposed photosensitive layer 160 inside the camera is reflected, scattered or otherwise transmitted, which are not yet protected by the opacifier.

This fogging problem arises from FIGS. 1 and 2, in which an assumed scheme of multiple internal reflections is indicated in a simplified manner, specifically with the aid of a light beam (beam A) ₁ which leads to fogging of a part of the recording material 160 which has not yet been is protected, can lead through the turbidity system. Currently, it is believed that this type of fog comes about on a similar phenomenon as the "light guiding" as opposed to the known phenomena of "edge fog" or ^H Endstückschieiers \ As is well known, edges or Endsohleier is usually at the edges and End pieces of

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Film rolls or film plates due to undesired exposure of the Films while loading or handling the films outside the camera. In contrast to this, the fogging avoided by the photographic materials according to the invention, which in the known products occur primarily in the part which is the last to pass the rollers 200, 400, i.e. the part of the recording material 160 which lasted the Preserves protection of the opacity system.

According to the invention, the transmission of light to such unprotected parts of the recording material 160 can be effectively prevented by providing a layer in the film unit containing a soluble or dispersible pigment or contains a pigment mixture, on the side of the recording material, to which the developer composition is applied, for example in the transparent carrier 100 of the film units according to FIG or 2 and / or in an adjacent layer. The amount of pigment in this layer should be sufficient to prevent fogging To prevent light scattering and / or reflection, but be insufficient to the transmission of the incident light on this surface essentially to prevent.

Finely divided pigments are particularly suitable for the purposes of the invention, which may absorb considerable light which latter are preferred. Examples are finely divided oxides of titanium, aluminum, silicon and barium sulfate and carbon black including graphite types, which are particularly preferred will.

In a particular embodiment according to the invention, finely divided carbon is used in the transparent support 10 of the film unit according to FIGS. 1 or 2 finely divided. The carbon can be a graphite or soot of various qualities or to be pyrrole / tic carbon. The average Particle size is on the order of 9 to 500 µm, below

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determined with the electron microscope. Medium-diameter carbon blacks under about 100 mn. are preferred.

The proportion of carbon present in the transparent layer may vary depending on factors such as the particular types of carbon black used and their particle size. The "best combination the desired properties are obtained by dispersing sufficient carbon to increase the optical density of the transparent carrier, measured on this side of the layer, - 'is at least about 5, preferably about 6 and not sufficient is to prevent transmission of incident light on this surface of the carrier 1C0 substantially. In one transparent carrier with a. Layer thickness of about 0.1 mm (4 mils), the carbon content can be about 1.075 to 3.22 mg / dm. (10 to 30 mg / ft.). The distribution of carbon in the bulk of the transparent support is done by painting Plastic and carbon and processing of this mass into the desired film of the appropriate thickness.

Surprisingly, a transparent layer prevents retaining finely dispersed small amounts of carbon, effective for fogging in those parts of the recording material which are not protected in time by the turbidity system could. It is also essential that the small amount of dispersed Carbon does not lead to a detrimental reduction in the transparency of the carrier 100, but for all practical purposes Cases this remains sufficiently transparent. As a result, the transparent layers containing dispersed deteriorate Carbon, not the ability to expose the film unit through this pigment-containing layer, e.g. in the sense of Fig. 2, so that no reduction in the image quality can be observed when viewed through this layer, namely the diffusion transfer image in the image layer 120 in the sense of FIG. 1.

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According to the invention, other pigments, which by absorption or diffuse scattering or in some other way the transmission of radiation, which would otherwise lead to fogging in the parts of the recording material 160 that has not yet passed through the turbidity system alone or are protected along with the carbon. The effective pigment tightness may vary depending on the pigment used and other factors, e.g. the influence of the pigment on the exposure time and the image quality. For example, according to the invention, a transparent support 100 can be used .- $ titanium dioxide, apply.

As mentioned above, such film units are in the For the purposes of the invention, the integral negative-positive film units are preferred or multiple units and for education of dye images, which are used without separation /! top view can be viewed as a reflection copy. Such film units are illustrated in Figs.

In the pig. 3, 4 is a photographic material 10 in the sense of U.S. Patent 3,415,644 shown. The essential components are a destructible container 11 containing the developer compound, in which there is an opacifier 12 and the recording material 13 in connection with the container 11. The recording material 13 consists of a dimensionally stable opaque support 14 of a blue green dye layer 15, a red sensitized silver halide emulsion layer 16, one Intermediate layer 17, a magenta dye layer 18, a green sensitized one Silver halide emulsion layer 19, one Intermediate layer 20, a yellow dye layer 21, a blue sensitized one Silver halide emulsion layer 22, an auxiliary 3 layer 23, which optionally contains an auxiliary developer for silver halide may contain, and finally the image layer 24 with Spacer layer 25, neutralizing layer 26 and dimensionally stable, transparent support 27, the exposure and

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Consideration of the transmission image within the image layer allowed.

U.S. Patent 3,415,644 can provide details on the The materials used in the individual layers and their dimensions, e.g. thickness, etc., as well as the components of the developer and the turbidity system and the procedures can be removed for exposure and development.

A product is particularly preferred as the developer composition roughly the following composition (USSN. 101 968 from 1970).

water

Potassium hydroxide, hydroxyethyl cellulose, highly viscous N-phenethyl-oC-picolinium bromide Benzotriazole titanium dioxide

100 ecm

11.2 g

3.4 g

2.7 g

1.15 g

50.0 g

(A)

2.08 g

^C 12 ^H 25 "°

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(B)

0.52 g ^C 16 ^K 33

(C)

1.18 g

Another type of photographic material is shown in FIGS. "in which the above fogging problem may arise (U.S. Patent 3 594 165) · The essential components of the film unit 50 are the recording material 53 and the destructible container 51 containing an aqueous alkaline solution 52. The Recording material 53 is made up of a dimensionally stable transparent carrier 65, a blue-sensitized one Silver halide emulsion layer 55 containing a yellow one Dye providing material, an intermediate layer 56, a

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green sensitized silver halide emulsion layer 57 containing a purple coloring material ", an intermediate layer 58, a red-sensitized silver halide emulsion layer 59, containing a blue-green dye-providing Material, an opaque support 60, an image receiving layer 61, spacer layer 62, neutralizing layer 63 and finally a dimensionally stable transparent carrier 64, wherein the Layers 64, 65 made of impermeable to the developer composition flexible foils.

In the embodiment of the film unit according to FIG the treatment composition is distributed between the image-receiving layer and the next assigned layer of the recording material, while at the embodiment of the film unit according to FIGS. 5, 6, this is arranged between the recording material and the one above it Image receiving material is distributed. Both systems are on the side on which the treatment liquid is applied for actinic radiation transparent, due to the fact that the The outer surface is formed by a transparent film and is not a suitable opacifier for protecting the recording material before fogging due to incident actinic light over this surface before application of the developing or treatment material, containing a special opacifying material is provided. As already pointed out, fogging occurs by incident light on the film unit when it is pulled out of the camera for development, when the developer or treatment liquid is applied. However, there is potential for fogging on the part of the Film unit that is still in the camera and has not yet been through the application of the treatment or development compound is protected from penetration of light via the edges.

According to the invention, this problem of potential fogging is effectively avoided in the case of photographic materials according to the Fig. 4, 5 by introducing a sufficient amount of pigment in

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a transparent support on the side of the recording material, to which the developer or treatment composition is applied, e.g., layer 27 in Figs. 3, 4 and layer 65 in Pig. 5, 6. As already mentioned, the amount of pigment in these layers is sufficient to prevent the formation of fog but insufficient to undesirably affect the image quality, which is obtained by exposure through this layer or on the image quality if this is achieved through the pigment-containing one Layer "is considered. For optimal protection, the pigment should be contained in such an amount that an optical density • of at least about 5, in particular 6, is achieved, specifically at the edges at 700 nm over a length of 25.4 mm. As mentioned, the amount of pigment should not be sufficient for sufficient transmission to prevent incident light or to adversely affect the viewing of the image, e.g. an optical one Have a density of less than about 0.05 as measured by incident light on that surface. It is obvious that the exact amount of pigment for this purpose can vary and should therefore not be precisely defined. Generally suitable Amounts of pigment in the order of magnitude between about 1 »075 and 3 »22 mg / dm. Anyway, the exact amount of a special pigment to prevent fogging in the film unit.

From the above it can be seen that the essence of the invention is in the It has been found that fogging in photographic materials can be effectively prevented by interposing a haze system exposed recording material and transparent support is present ^ and in. transparent layers an amount of pigment is used which is sufficient to prevent fogging, but is not sufficient to disadvantageous Influence on the function of this transparent layer, e.g. insufficient to worsen the quality of the through this layer viewed images or the image quality itself.

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The most varied of modifications in those listed for explanation Measures of the preferred embodiment according to the invention are permissible. This is the case with the preferred embodiments dos the layer containing the pigment dispersion with the photographic material integrated, but this can be arranged in such a way that it does its job of preventing the formation of soles met during development, but can be removed after development is complete. Also can contain layers other pigments or mixtures which prevent fogging can be used. The arrangement of these layers can differ from de? shown in the preferred embodiment.

} The essential feature of the invention is independent of that special diffusion transfer process and the phot ο sensitive system used, e.g. with developer dyes. Even The measures according to the invention can of course be applied how to make negative or positive diffusion transfer images «This also applies to others Diffusion transfer systems with image-forming substances instead of the preferred developer dyes (USA patents 2 647 049, 2 661 293, 2 698 244, 2 698 798, 2 802 755), . being color diffusion transfer processes using is about color couplers. This involves the conversion of one or more color-developing substances

P with one or more color couplers to form a dye transfer image within the image receiving layer (U.S. Patent 2,774,668). Color diffusion transfer method of this Art are used for the image-correct differential transfer of complete dyes by a mechanism that is described in the above Patent and results in a transfer dye image within a continuous image receiving layer. The imaging material is wholly or partially initially insoluble or undiffusible as it is in the film unit ^ and becomes diffusible as a function of development during development, and therefore allows diffusion of an image constituting one Materials.

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While "so far the measures according to the invention based on integral negative-positive film units for the production of color transfer images have been explained, which can be viewed skopien without separation from the rest of the film unit in the manner of color top view, the invention is not limited to it, but is suitable also fixm image-receiving elements, containing a dyeable layer on a transparent support, which is arranged, over an exposed recording material and developed in the light in the above manner

should be, regardless of the elements present, whereby If necessary, the two elements can then be separated so that color slides can also be obtained. The Apply the invention in film units where negative and positive materials are initially held together, e.g. as Laminate in the sense of the film units shown in the figures, whereupon however the positive component, containing the color transfer image, peeled off or otherwise separated from the negative component after the color image has been built up.

While the measures according to the invention are primarily used for color photography, it is evident that that they are also effective for similarly constructed film units for black and white photographs, e.g., silver diffusion transfer images. Such a film unit has, for example in a laminate, an opaque, dimensionally stable support, a light-sensitive one. Silver halide emulsion layer, an image receiving layer more commonly Art and a dimensionally stable transparent carrier containing the pigment. Such an exposed film unit is developed by distributing a haze system between the transparent support and the exposed emulsion layers, whereby a multiple copy including a negative Image and a diffusion transfer image which can be viewed without separation by reflection or plan view.

Claims

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Claims (14)

Pat entan s ρ r ü ο h e 1. photographic material for making diffusion transfer images, containing a turbidity system in an integral connection with a photosensitive recording material, this is distributed between the elements for protection against actinic radiation and the photosensitive recording material in Connection to a transparent carrier with the opacity system between them can be arranged ^ thereby g e k e η η ze It is understood that the transparent support contains a pigment in an amount sufficient to deteriorate the transmission of actinic radiation to the unprotected parts of the recording material, but not sufficient substantial prevention of incident light. 2. Photo material according to claim t, characterized in that the amount of pigment is sufficient for an optical Density in the layer of about 6 measured on the side of the layer. 3 · Photo material according to claim 1 or 2, characterized in that the pigment is carbon. 4. Photo material according to claim 1 to 3, characterized in that containing the transparent layer Pigment in the film unit is arranged so that the exposure of the recording material and the observation of the Image is made possible by this. 209829/1017 la-40 685 5. Photo material according to claim 1 to 4, characterized in that the opacity system in the Developer compound is present. 6. color photographic material according to claim 1 to 5 · characterized ι that it is a photosensitive recording material, Containing a transparent carrier with fine carbon dispersed therein in sufficient quantity, to give an optical density of about 6, . . '. "·" ■ -., ": One for developer ground contains a permeable opaque layer and an image-receiving layer and a developer composition containing the opacity system is provided is. 7. color photographic material according to claim 1 to 5 »characterized in that the film unit is constructed of a recording material containing an opaque layer, a photosensitive layer, for a diffusion transfer color image an image receiving layer, a finely divided carbon containing, transparent layer for an optical density of this layer of about 6 and in the developer composition the opacity system is present in the arrangement that this can be distributed between the light-sensitive layer and the image-receiving layer. 8. color photographic material according to claim 6, characterized in that the developer composition in a destructible Container is present and represents a mass containing an alkaline turbidity system. 9 · photomaterial according to claim 1 to 8, characterized in that in the transparent carrier or The pigment is arranged in a layer between the support and the photosensitive layer. 10. color photographic material according to claim 9 »characterized in that the recording material has a red 209829/1017 -> - 1A-40 685 sensitized, green-sensitized and blue-sensitized Silver halide emulsion layer with associated blue ^ -g-green-, comprises purple and yellow dye image forming material. 11. color photomaterial according to claim 9, characterized in that the dye image-forming material is soluble and diffusible in alkalis at a first pH and insoluble and undiffusible at a second pH. 12. Photo material according to claim 1 to 11, characterized in that the opacifying system is a P represents a dispersion of an inorganic reflective pigment and optionally at least one optical filter medium at a pH value above the pKa value of the optical filter medium in such a concentration that the optical transmission density = 6 > and means are provided for reducing the pH -Value below the pKa value of the optical filter medium after diffusion and solubilization of the image-forming material. 13 · Photo material according to claim 1 to 12, characterized in that a polymer spacer for Permeable alkaline solutions is provided between the ". alkalipermeable and dyeable image layer and the alkalipermeable Polymeric acid layer. 14. Photo material according to claim 13, characterized in that the spacer layer increases with increasing Has temperature decreasing permeability for the alkali solution. Θ1ΧΧΙ 209829/1017