EP0023888B1 - Procédé de préparation d'images masquées en couleurs d'après le procédé de blanchiment des couleurs à l'argent ainsi que le matériel photographique de blanchiment des couleurs à l'argent à utiliser dans ce procédé - Google Patents

Procédé de préparation d'images masquées en couleurs d'après le procédé de blanchiment des couleurs à l'argent ainsi que le matériel photographique de blanchiment des couleurs à l'argent à utiliser dans ce procédé Download PDF

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Publication number
EP0023888B1
EP0023888B1 EP80810234A EP80810234A EP0023888B1 EP 0023888 B1 EP0023888 B1 EP 0023888B1 EP 80810234 A EP80810234 A EP 80810234A EP 80810234 A EP80810234 A EP 80810234A EP 0023888 B1 EP0023888 B1 EP 0023888B1
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EP
European Patent Office
Prior art keywords
layer
silver
dye
layers
iodide
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EP80810234A
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German (de)
English (en)
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EP0023888A3 (en
EP0023888A2 (fr
Inventor
Herbert Mollet
Alfred Dr. Oetiker
Carlo Dr. Boragine
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Novartis AG
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Ciba Geigy AG
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Publication of EP0023888A2 publication Critical patent/EP0023888A2/fr
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Publication of EP0023888B1 publication Critical patent/EP0023888B1/fr
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/28—Silver dye bleach processes; Materials therefor; Preparing or processing such materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/156—Precursor compound
    • Y10S430/158—Development inhibitor releaser, DIR

Definitions

  • Photographic processes for producing colored images or for reproducing colored templates practically work exclusively on the subtractive principle.
  • three layers lying on top of one another are used on a transparent or opaque support, each of which contains a partial image in the subtractive basic colors of cyan, purple and yellow. It is thus possible to reproduce all color tones within the color space determined by the three primary colors.
  • the image dyes With a suitable choice of the image dyes, the colors occurring in nature or original can be satisfactorily reproduced with regard to tonal value and saturation. A prerequisite for this is a favorable mutual coordination within the triple dye and a high saturation of the individual primary colors.
  • This so-called secondary color density does not in itself prevent the reproduction of all color and brightness values occurring within the color space; however, it has the consequence that a change in the color density within a color layer, as can be achieved by known photographic processes with the aid of a correspondingly sensitized silver halide emulsion, affects both the main color density and the secondary color density. This results in undesirable color shifts and saturation losses, which significantly disturb the color fidelity when reproducing a template.
  • Secondary color densities are basically present in all three subtractive primary colors: in yellow (main absorption in blue) in red and green, in purple (main absorption in green) in red and blue and in blue-green (main absorption in red) in green and blue.
  • the secondary color densities of the purple dyes in blue and red, and also the secondary color density of the cyan dye in blue, are particularly strong and therefore disturbing.
  • the secondary color density of the cyan dye in green is somewhat less disturbing, and to a lesser extent that of the yellow dye in red and green. As a result, the reproduction of pure blues and reds in photographic color materials is always associated with difficulties.
  • the masking process has found widespread use in the field of chromogenic color photography (color development process).
  • Various effects are used for masking.
  • the residual silver halide remaining after development can be used to form a mask image with the opposite gradation, as described in German Patent Specifications 743 535 and 898 709 or in Swiss Patent Specification 721 389.
  • Other patents such as German patent 950617 or British patents 665 657, 714 012 and 1 210893, describe the production of a mask image by chemical conversion of the color coupler which has remained unused during color development.
  • Masked color images used for the production of Color copies or color separations for the production of printing plates for reproduction can also be obtained by recording the compensating color images on separate supports and covering the latter, together with the original, before the copying process.
  • Such methods are described, for example, in German patents 975 867, 976 138, 976 904, 965 615 and in German patent specification 1 142 757, as well as in British patent specification 903-050.
  • a material in which a layer with development nuclei is arranged between a first layer with a dye whose undesired secondary color density is to be corrected and a second layer with a second dye whose main color density corresponds to the secondary color density of the first dye.
  • the first dye is associated with an iodide-containing, the second dye, on the other hand, an iodide-free or low-iodide silver halide emulsion.
  • a silver halide solvent e.g. Thiosulfate.
  • the iodide-free emulsion assigned to the second dye forms a soluble complex from the unexposed and undevelopable silver halide, which is reduced to metallic silver at the germs of the intermediate layer. If the silver halide emulsion assigned to the first dye was now exposed, iodide ions form at the image sites during the subsequent development, which likewise migrate into the seed layer and prevent silver accumulation from the complex at the relevant sites. A silver image is formed in the seed layer, which is opposite to the silver image belonging to the first dye. This is used in the subsequent bleaching process to bleach the second dye, which creates the desired masking effect. A further development of this method is described in German Offenlegungsschrift 2,831,814.
  • a very insensitive emulsion and possibly a stabilizer or development retardant are added to the germ layer.
  • the reaction mechanism in the creation of the mask image remains the same; however, the insensitive silver halide emulsion in the seed layer acts as an additional silver supplier that also reacts to the immigrating iodide ions.
  • a further embodiment of the method according to the invention relates to a photographic material which does not contain any pre-veiled, iodide-free or low-iodide silver halide emulsion in the layer (s) (c), but only has such an emulsion in at least one layer which is the layer (s) (en) (c) is adjacent and which is separated from one or more layers (a) by at least one intermediate layer.
  • the present invention also relates to the new photographic silver color bleaching material for carrying out the process according to the invention.
  • a silver halide emulsion which is assigned to an image dye layer is to be understood as an emulsion which, after exposure and development, provides a silver image which, in the subsequent color bleaching process, produces a counter-rotating dye image in a known manner in the assigned dye layer.
  • the emulsion is spectrally sensitized so that its maximum sensitivity corresponds to the absorption maximum of the assigned image dye (sensitive in the area of the complementary color of the image).
  • a trichromatic material with which the entire visible dye spectrum can be reproduced can then be produced in a known manner from three such dye-emulsion pairs.
  • it is also possible to sensitize an emulsion assigned to an image dye in a different spectral band as is the case, for example, is common in infrared-sensitive false color films.
  • Adjacent layers are to be understood as layers which, due to their mutual position, promote the exchange of chemical species - molecules or ions. The term therefore also encompasses those layers which are not immediately adjacent but are optionally separated from one another by one or more thin layers which do not hinder diffusion.
  • the developing solution contains no complexing agents;
  • the iodide ions migrating from the neighboring layer directly influence the chemical development of the pre-veiled emulsion.
  • Suitable development delays are e.g. Benzotriazole, 2-mercaptobenzthiazole, N-methylmercaptotriazole, 2-mercaptobenzoxazole, phenylmercaptotetrazole, triazolindolizine and their derivatives.
  • Information on the use of such development delays can be found e.g. in E. Birr, Mechanism of Stabilization of Photographic Emulsions, Journal for Scientific Photography 50, I, 107 (1955).
  • An important condition is that the solubility product of the silver salt formed from the development retarder is between that of the silver chloride and that of the silver iodide [cf. FROM. Cohen et al, in Photographic Sci. and eng. 9, 96, (1965)].
  • Pre-veiled silver halide emulsions which can be developed spontaneously without exposure, are prepared by methods known per se, e.g. by exposure to light or by chemical treatment with the usual fogging agents, such as thiourea dioxide, tin (2) chloride, hydrazine, boranes, formaldehyde sulfoxylates or gold salts (complex). Since the veiled emulsions must not develop too quickly, silver bromide emulsions are preferably used. Smaller proportions of up to about 20 mole percent silver chloride can be used; Emulsions with higher silver chloride contents can generally be developed too quickly. The proportion of silver iodide should be low, u. do not exceed about 1.0 mole percent, since otherwise the influencing of the development used in the process according to the invention by immigrating iodide ions would not be guaranteed.
  • fogging agents such as thiourea dioxide, tin (2) chloride, hydrazine, boranes, formalde
  • the pre-veiled emulsion spontaneously develops to maximum density; the green-sensitized emulsion remains unexposed and only develops up to the level of fog (A 2 ).
  • the yellow layer assigned to the pre-veiled emulsion is practically completely bleached out, the purple layer remains unaffected (A 3 ).
  • the green-sensitive emulsion is gradually exposed according to the wedge.
  • Development (C 2 ) produces iodide ions proportional to the exposure, which migrate into the pre-veiled emulsion layer above and inhibit the spontaneous, exposure-independent development there. This creates a silver image that runs in the opposite direction to the image in the lower emulsion layer.
  • After the color and silver Bleaching remains in the magenta layer with a dye image that runs in the same direction as the original, and in the yellow layer in an opposite direction.
  • the thickness and silver halide concentration of the pre-veiled emulsion layer will be adjusted so that even in the maximum case, i.e. in the case of a completely unexposed lower emulsion layer, only that part of the yellow layer which corresponds to the maximum secondary color density in blue of the unbleached purple layer is bleached away.
  • the scheme of the layer arrangement shows only the general case in which the dye and the associated emulsion sensitized in the complementary color of the basic color are in the same layer. Of course, these assembled components can also be distributed over two or even three different, adjacent layers. Such layer arrangements are e.g. have been described in German Offenlegungsschriften 2036918, 2132835 and 2132836. They primarily serve to influence the relatively steep gradation in silver color bleaching materials or to increase the sensitivity.
  • Silver color bleaching materials for reproducing colored originals are generally trichromatic and contain three layers of color, one each in the subtractive primary colors yellow, purple and teal. To achieve special effects, materials with other colors or with only two layers of color can also be used. Otherwise, the yellow, purple and cyan dyes known per se for this purpose can be used as image dyes in combination with the appropriate spectral sensitizers.
  • Bleachable dyes which are suitable for the production of dye-containing silver halide emulsions for the silver color bleaching material are described, for example, in US Pat. Nos. 3,454,402, 3,443,953, 3,804,630, 3,716,368, 3,877,949, 3,623,874, 3,931,142 and 4,051,123.
  • the material can also have additional layers in which at least one of the two components image dyes and silver halide is missing.
  • silver halide emulsions those are normally used which contain silver chloride, bromide or iodide or mixtures of these halides.
  • Silver halide emulsions containing iodide normally contain between 0.1 and 10, preferably 1 to 5 mole percent silver iodide, the rest consists of silver chloride and / or bromide (e.g. 0 to 99.9 mole percent silver chloride and 0 to 99.9 mole percent silver bromide).
  • Iodide-free silver halide emulsions preferably contain silver chloride, silver bromide or a silver chloride-silver bromide mixture.
  • Gelatin is usually used as a protective colloid to prepare these emulsions; however, other water-soluble protective colloids such as polyvinyl alcohol or polyvinyl pyrrolidone, etc. can also be used; furthermore, part of the gelatin can be replaced by dispersions of non-water-soluble high-molecular substances. Is common. e.g. the use of dispersion polymers of a, ⁇ -unsaturated compounds such as acrylic acid esters, vinyl esters and vinyl ethers, vinyl chloride, vinylidene chloride and other mixtures and copolymers.
  • Intermediate layers generally contain only pure binder, e.g. B. gelatin and no dye or silver halide. If it is favorable for the overall layer structure, an existing emulsion layer or a filter layer can optionally also serve as a separation layer.
  • the separating layer can contain other additives, such as substances that inhibit color bleaching, additional binders, such as contain water-soluble colloids or water-insoluble dispersion polymers, and also the additives customary for the construction of the other photographic layers, such as plasticizers, wetting agents, light stabilizers, filter dyes or curing agents.
  • the emulsions can be applied to conventional supports for photographic recording material.
  • a mixture of several colloids can be used to disperse the silver halides.
  • the carrier can consist, for example, of pigmented cellulose triacetate or polyester. If it is made of paper felt, it must be coated on both sides or coated with polyethylene.
  • the photosensitive layers are located on at least one side of this support, preferably in the known arrangement, i.e. a red sensitized silver halide emulsion layer containing a blue-green azo dye, a green sensitized silver halide emulsion layer containing a purple azo dye and a blue sensitive silver halide emulsion layer containing a yellow azo dye.
  • the material can also contain sub-layers, intermediate layers, filter layers and protective layers. The total thickness of the layers in the dry state should generally not exceed 20 tm.
  • Processing the exposed silver color bleach Materials are carried out in the usual way and include silver development, color bleaching, silver bleaching and fixation, and subsequent rinsing and, if necessary, also between the individual stages (see, for example, DE-OS 2 448 443). Color bleaching and silver bleaching, and possibly also fixation, can be combined in a single treatment step.
  • Baths of conventional composition can be used for silver development, e.g. B. those containing hydroquinone as the developer, if desired additionally 1-phenyl-3-pyrazolidinone, but no silver complexing agent.
  • the silver developing bath as described in Swiss Patent 405 929, additionally contains a color bleaching catalyst.
  • Color bleaching baths - provided that the color bleaching is carried out as a separate treatment step - are advantageously those which, in addition to a strong acid, a water-soluble iodide and an antioxidant for the iodide, contain a color bleaching catalyst.
  • Combined color and silver color bleaching baths usually contain a water-soluble oxidizing agent in addition to the specified components.
  • Suitable color bleach catalysts are primarily diazine compounds, e.g. Derivatives of pyrazine, quinoxaline or phenazine. They are e.g. described in German patent specifications 2 010 280, 2 144 298 and 2 144 297, in French patent specification 1 489 460, in US patent specification 2 270 118 and in DE-A-2 448 443.
  • Strong acids are to be understood here as those which give the color bleach bath or the combined color and silver bleach bath a pH value of at most 2. So e.g. Hydrochloric acid, phosphoric acid and especially sulfuric acid or sulfamic acid can be used.
  • Alkali iodides such as potassium iodide or sodium iodide can be used as the water-soluble iodide.
  • Suitable oxidizing agents are nitroso compounds, e.g. p-nitrosodimethylaniline, nitro compounds such as e.g. aromatic nitro compounds and preferably aromatic mono- or dinitrobenzenesulfonic acids, e.g. m-nitrobenzenesulfonic acid.
  • Reductones or water-soluble mercapto compounds are advantageously used as antioxidants.
  • Suitable reductones are in particular aci-reductones with a 3-carbonyl-endiol (1,2) grouping such as reductin, triose reductone or preferably ascorbic acid.
  • Suitable mercapto compounds are those of the formula HSA (B) m , in which A is an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic bridge member, B is a water-solubilizing radical and m is an integer of at most 4 (DE-A-2 258 076, 2 423 819).
  • the silver fixing bath can be composed in a known and customary manner. Is suitable as a fixative. e.g. Sodium thiosulfate or advantageously ammonium thiosulfate, if desired with additives such as sodium bisulfite, sodium metabisulfite and / or ammonium bisulfite and optionally complexing agents such as ethylenediaminetetraacetic acid.
  • a fixative e.g. Sodium thiosulfate or advantageously ammonium thiosulfate, if desired with additives such as sodium bisulfite, sodium metabisulfite and / or ammonium bisulfite and optionally complexing agents such as ethylenediaminetetraacetic acid.
  • All treatment baths can contain other common additives such as Contain hardening agents, wetting agents, optical brighteners or UV protection agents.
  • the layer thickness is 2 ⁇ m, which corresponds to an application of 1.7 g of silver, 2.2 g of gelatin and 0.075 g of dye per M 2 .
  • the samples of the potted and dried materials are exposed to white light from the carrier side using a step wedge and then processed as follows:
  • Watering is switched on between the individual processing stages and at the end.
  • an opposing latent silver image is formed in layer (a); A fully developable latent image is consistently present in layer (c) due to the pre-exposure of the emulsion.
  • iodide ions are released in proportion to the strength of the resulting negative step image, which migrate through the intermediate layer (b) to layer (c) and inhibit the development of the latent image there.
  • This creates a counter-rotating silver image in this layer i.e. where the greatest blackening occurs in layer (a), the silver image in layer (c) is weakest and vice versa.
  • the 1-phenyl-5-mercaptotetrazole which acts as a development retarder, is prevented by the intermediate layer (b) from diffusing into the layer (a) and therefore only influences the development rate in the layer (c).
  • layers (a) and (c) each have a positive color image opposite to the silver image.
  • the finished copy obtained after fixation and washing is therefore showing a positive purple image that runs in the same direction as the exposure wedge and a yellow image that runs in the opposite direction.
  • Samples of the potted and dried material are exposed to white light from the carrier side using a step wedge and then processed as in Example 1.
  • the combined color and silver bleaching produces in layers (a) and (c) a positive color image opposite to the silver image.
  • the finished copy obtained after fixation and washing is therefore showing a positive purple image that runs in the same direction as the exposure wedge and a yellow image that runs in the opposite direction.
  • Example 2 The experiment described in Example 2 is repeated, except that in layer (c) a blue-green dye of the formula instead of the yellow dye is used.
  • the silver iodobromide emulsion used in Example 2 for layer (a) is sensitized green in the usual way. 5.5 g of the purple dye given in Example 1 in the form of a 1% strength aqueous solution are added to 100 g of this emulsion.
  • the layer application after drying is 2 g of gelatin, 0.135 g of silver and 0.135 g of dye per m 2 .
  • the green-sensitized emulsion used in layer (a) above is poured with the addition of further gelatin, but without the addition of colorants, to form a layer with the following composition: gelatin 1.5 g, silver 0.315 g (dry weight).
  • a sample of the dried four-layer cast is exposed to green light under a step wedge.
  • the exposed wedge is processed in the same way as described in Example 1.
  • the intermediate image effect (compensation of the blue secondary color density of the purple layer) can be quantitatively recorded in a simple manner by exposing the green-sensitized layers through a step wedge:
  • the optical density of the yellow layer in the blue spectral range is parallel to the exposure of the green-sensitive layers (and thus for the subsequent bleaching of the purple layer).
  • the optimal intermediate image effect is achieved when the increase in density of the yellow layer corresponds to the blue secondary color density of the unbleached purple layer when the purple layer is fully exposed.
  • Column a) relates to the material according to Example 4, column b) the comparative example without a coated emulsion in layer d).
  • Example 5 For comparison with the processing method according to US Pat. No. 4,046,566, a strip of the material described in Example 5 is exposed and developed and then subjected to a bleaching treatment of 2, 3 or 4 minutes in the bleaching bath described in Example 4.
  • the samples are fixed immediately after the bleaching treatment and the residual silver content is determined in the fixed samples.
  • the shelf life of a developer solution according to the invention is compared with that of a developer solution according to US Pat. No. 4,046,566, which contains sodium thiosulfate in order to achieve the intermediate image effect.
  • Example 5 Half of a sheet of the material described in Example 5 is exposed to white light and then developed in a drum under the conditions given in Example 5. The used developer is collected in a beaker and observed for a long time. The solution remains clear and does not change color even after standing for several days.
  • the experiment is then repeated under the same conditions, except that 1.4 g of sodium thiosulfate (Na z S 2 0 3. 5 H z O) per liter are added to the developer be set.
  • the used developer turns brown after 10 minutes and is clearly cloudy after 20 minutes. After a few hours the wall of the beaker is brown.

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Claims (15)

1. Procédé pour la préparation d'images en couleurs positives masquées d'après le procédé de blanchiment des couleurs à l'argent par exposition, développement de l'argent, blanchiment des couleurs, blachiment de l'argent et fixage, le blanchiment de l'argent pouvant être combiné éventuellement avec le blanchiment des couleurs et/ou le fixage dans un seul bain de traitement, d'un matériau photographique qui contient:
(a) dans au moins une couche, au moins un premier colorant d'image duquel au moins une densité de couleur secondaire non souhaitée doit être compensée,
(b) dans la (ou les) couche(s) (a) et/ou dans une couche voisine de cette (ou de ces) couche (s), une émulsion d'halogénure d'argent contenant du iodure associée à ce colorant ou à chacun de ces colorants
(c) dans au moins une autre couche, au moins un deuxième colorant dont la densité de couleur principale correspond à la densité de couleur secondaire à compenser du premier ou de chaque premier colorant, et
(d) dans la (ou les) couche(s) (c) et/ou dans une (ou des) couche(s) voisine(s) de celle-ci ou de celles-ci, une émulsion d'halogénure d'argent sans iodure ou une émulsion d'halogénure d'argent pauvre en iodure comparable aux émulsions mentionnées en (b), associées à ce colorant ou à ces colorants, caractérisé par le fait que le matériau photographique contient
(e) dans au moins une couche (c) et/ou dans au moins une autre couche qui est voisine de la (ou des) couche(s) (c) et qui est séparée d'une ou de plusieurs couche(s) (a) par au moins une couche intermédiaire, une émulsion d'halogénure d'argent voilée au préalable, sans iodure ou pauvre en iodure, développable spontanément à la densité maximale sans exposition et contenant un retardateur de développement, et que le développement s'effectue dans une solution de développateur qui ne contient aucun complexant de l'argent.
2. Procédé selon la revendication 1, caractérisé par le fait qu'on utilise comme retardateur de développement un 5-mercaptotétrazole substitué sur la position 1 par un groupe alkyle, aryle ou aralkyle.
3. Procédé selon la revendication 1, caractérisé par le fait que la (ou les) couche(s) ne contient ou ne contiennent aucune émulsion d'halogénure d'argent sans iodure ou pauvre en iodure voilée au préalable, et que dans le matériau photographique, on dispose entre la couche (e) qui contient l'émulsion d'halogénure d'argent voilée au préalable, et la couche (b) contenant une émulsion d'halogénure d'argent contenant du iodure, au moins une couche intermédiaire qui ne renferme ni colorant ni halogénure d'argent.
4. Procédé selon la revendication 1, caractérisé par le fait que les émulsions d'halogénure d'argent associées aux colorants d'image présentent des sensibilités spectrales dans chacune des couleurs complémentaires du colorant d'image ou d'autres sensibilités spectrales.
5. Procédé selon la revendication 1, caractérisé par le fait que les deux composants associés entre eux, à savoir colorant d'image et halogénure d'argent, sont répartis sur deux ou trois couches différentes voisines l'une de l'autre.
6. Procédé selon les revendications 1 à 5, caractérisé par le fait qu'est utilisé un matériau trichroma- tique qui contient dans chaque couche, comme colorant d'image, un colorant vert bleuâtre, un colorant pourpre et un colorant jaune.
7. Procédé selon les revendications 1 à 6, caractérisé par le fait que les émulsions d'halogénure d'argent sensibilisées, associées aux divers colorants d'image, se trouvent dans la même couche que les colorants d'image correspondants.
8. Procédé selon les revendications 1 à 7, caractérisé par le fait que les émulsions d'halogénure d'argent sensibilisées, associées aux divers colorants d'image, se trouvent au moins partiellement dans une couche voisine de la couche de colorant.
9. Procédé selon les revendications 1 à 8, caractérisé par le fait qu'une ou deux densités de couleur secondaire est ou sont compensées par un colorant d'image d'un matériau à plusieurs couches.
10. Procédé selon les revendications 1 à 8, caractérisé par le fait que chacune des densités de couleur secondaire est compensée par deux colorants d'image d'un matériau à plusieurs couches.
11. Procédé selon les revendications 1 à 10, caractérisé par le fait que les couches d'émulsion sans iodure d'argent, associées à un deuxième colorant, contiennent du chlorure d'argent ou du bromure d'argent ou bien un mélange des deux halogénures.
12. Procédé selon les revendications 1 à 11, caractérisé par le fait que les émulsions contenant du iodure d'argent contiennent 0 à 99,9% en mole de chlorure d'argent, 0 à 99,9% en mole de bromure d'argent et 0,1 à 10, de préférence 1 à 5% en mole de iodure d'argent.
13. Procédé selon les revendications 1 à 12, caractérisé par le fait que l'émulsion voilée au préalable, spontanément développable, est une émulsion de chlorobromure ou de bromure d'argent contenant au maximum 20% en mole de chlorure d'argent et au maximum 1 % de iodure d'argent, qui a été voilée par exposition préalable ou par traitement chimique.
14. Matériau photographique pour blanchiment des couleurs à l'argent, pour la préparation d'images en couleurs positives masquées, qui contient:
(a) dans au moins une couche, au moins un colorant d'image à partir duquel au moins une densité de couleur secondaire non souhaitée doit être compensée,
(b) dans la (ou les) couche(s) (a) et/ou dans une couche voisine de celle-ci ou de celles-ci, une émulsion d'halogénure d'argent contenant du iodure associée à ce colorant ou à chacun de ces colorants
(c) dans au moins une autre couche, au moins un deuxième colorant dont la densité de couleur principale correspond à la densité de couleur secondaire à compenser du premier colorant ou de chaque premier .colorant, et
(d) dans la (ou les) couche(s) (c) et/ou dans une ou des couche(s) voisine(s) de celle-ci ou de celles-ci, une émulsion d'halogénure d'argent sans iodure ou une émulsion d'halogénure d'argent pauvre en iodure comparable aux émulsions mentionnées en (b), associé à ce colorant ou à ces colorants, caractérisé par le fait que
(e) il contient dans au moins une couche (c) et/ou dans au moins une autre couche qui est voisine de la (ou des) couche(s) (c) et qui est séparée d'une ou de plusieurs couche(s) (a) par au moins une couche intermédiaire, une émulsion d'halogénure d'argent voilée au préalable, sans iodure ou pauvre en iodure, développable spontanément à la densité maximale sans exposition et contenant un retardateur de développement.
15. Matériau pour blanchiment des couleurs à l'argent selon la revendication 14, caractérisé par le fait que la densité optique d'au moins une couche de colorant d'image, dont la densité de couleur principale correspond à la densité de couleur secondaire à compenser d'une autre couche, est augmentée d'une valeur qui compense la perte de densité après un traitement à l'état non-exposé.
EP80810234A 1979-08-01 1980-07-28 Procédé de préparation d'images masquées en couleurs d'après le procédé de blanchiment des couleurs à l'argent ainsi que le matériel photographique de blanchiment des couleurs à l'argent à utiliser dans ce procédé Expired EP0023888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH707879 1979-08-01
CH7078/79 1979-08-01

Publications (3)

Publication Number Publication Date
EP0023888A2 EP0023888A2 (fr) 1981-02-11
EP0023888A3 EP0023888A3 (en) 1981-12-23
EP0023888B1 true EP0023888B1 (fr) 1984-01-25

Family

ID=4319584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810234A Expired EP0023888B1 (fr) 1979-08-01 1980-07-28 Procédé de préparation d'images masquées en couleurs d'après le procédé de blanchiment des couleurs à l'argent ainsi que le matériel photographique de blanchiment des couleurs à l'argent à utiliser dans ce procédé

Country Status (5)

Country Link
US (1) US4310617A (fr)
EP (1) EP0023888B1 (fr)
JP (1) JPS5655944A (fr)
CA (1) CA1156870A (fr)
DE (1) DE3066277D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4374914A (en) * 1980-07-22 1983-02-22 Ciba-Geigy Ltd. Process for the production of negative color images by the silver dye bleach process, and the silver dye bleach material used in this process
US4368256A (en) * 1980-07-22 1983-01-11 Ciba-Geigy Ag Process for production of masked positive color images by the silver dye bleach process and the silver dye bleach material used in this process
DE3366751D1 (en) * 1982-02-22 1986-11-13 Ciba Geigy Ag Negative working photographic silver dye-bleach material
JPH0192742A (ja) * 1987-08-05 1989-04-12 Doi:Kk カラー写真の作成方法
US5399466A (en) * 1993-01-15 1995-03-21 Eastman Kodak Company [Method of processing] photographic elements having fogged grains and development inhibitors for interimage
US5979719A (en) * 1998-04-17 1999-11-09 Vesuvius Crucible Company Soft-bore monoblock pouring tube

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336380A (en) * 1939-04-05 1943-12-07 Gen Aniline & Film Corp Process for the production of color separation pictures of correct tone value
BE453209A (fr) * 1939-11-02
US3708300A (en) * 1970-11-19 1973-01-02 Eastman Kodak Co Silver-dye-bleach photographic materials
CH596580A5 (fr) * 1974-10-28 1978-03-15 Ciba Geigy Ag
CA1057109A (fr) * 1975-04-10 1979-06-26 Nicholas H. Groet Accentuation d'effets interimages
CH633641A5 (de) * 1977-07-21 1982-12-15 Ciba Geigy Ag Verfahren zur herstellung maskierter positiver farbbilder nach dem silberfarbbleichverfahren.

Also Published As

Publication number Publication date
JPS5655944A (en) 1981-05-16
DE3066277D1 (en) 1984-03-01
US4310617A (en) 1982-01-12
EP0023888A3 (en) 1981-12-23
EP0023888A2 (fr) 1981-02-11
CA1156870A (fr) 1983-11-15

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