EP0044813B1 - Procédé pour la formation d'images négatives en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé - Google Patents

Procédé pour la formation d'images négatives en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé Download PDF

Info

Publication number
EP0044813B1
EP0044813B1 EP81810291A EP81810291A EP0044813B1 EP 0044813 B1 EP0044813 B1 EP 0044813B1 EP 81810291 A EP81810291 A EP 81810291A EP 81810291 A EP81810291 A EP 81810291A EP 0044813 B1 EP0044813 B1 EP 0044813B1
Authority
EP
European Patent Office
Prior art keywords
silver
layer
core
emulsion
shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81810291A
Other languages
German (de)
English (en)
Other versions
EP0044813A3 (en
EP0044813A2 (fr
Inventor
Herbert Mollet
Dieter Dr. Wyrsch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cessione ilford AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of EP0044813A2 publication Critical patent/EP0044813A2/fr
Publication of EP0044813A3 publication Critical patent/EP0044813A3/de
Application granted granted Critical
Publication of EP0044813B1 publication Critical patent/EP0044813B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to a new process for producing negative color photographic images by the silver color bleaching process and the silver color bleaching material used in this process.
  • the silver color matching process is based on the fact that certain classes of dyes, especially azo dyes, are reductively bleached in the presence of finely divided silver by strongly acidic baths containing a silver complexing agent. This reaction can be accelerated by catalysts, especially diazine compounds.
  • the effect of finely divided silver on dyes can be used to convert photographically produced silver images into color images.
  • the primary silver image is negative, i. H. opposed to submission.
  • a second image reversal takes place, so that the resulting dye image is positive, i. H. is in sync with the template.
  • the silver color bleaching process is therefore primarily used to produce positive color copies based on slides.
  • Iodide ion diffusion is one method described in U.S.-A-3,695,881.
  • an unveiled interior image emulsion is arranged, which is made difficult to fix by treatment with a heterocyclic nitrogen compound.
  • the iodide ions migrating out of the silver iodide emulsion favor the dissolution of the interior image emulsions treated in this way in the fixing step.
  • a positive image is thus again obtained in this emulsion, which can be used to produce a color image.
  • a disadvantage of the known silver dye bleaching materials is that one is normally forced to store light-absorbing dyes in emulsion layers which are sensitized in the main absorption area of the dye. This causes a great loss of sensitivity.
  • the object of the present invention is therefore to provide a method for producing negative photographic color images using iodide ion diffusion, which largely overcomes these disadvantages.
  • a core-shell emulsion is used in the layer containing a bleachable dye, the particles of which contain a veiled core which may have been treated with a development retarder.
  • the onset of the spontaneous development of the core-shell emulsion can be influenced by the choice of a suitable shell thickness around the veiled core so that the spontaneous development coincides with the diffusion of the development-controlling iodide ions.
  • An additional development-retarding effect can be achieved by treating the cores with one of the customary development retarders before the silver halide shell is applied.
  • the dye need not be present in the light-sensitive layer.
  • This can also be strongly light-absorbing, e.g. B. black dyes are used, the use of which is normally excluded in a silver color bleaching material. This allows the production of a black and white negative material, the silver content of which is completely recoverable.
  • the photographic material if it consists of more than one layer package, optionally contains intermediate layers d) between the layer packages, and that the development takes place in a developer solution free of silver complexing agents.
  • silver haloiodide emulsion means a silver chloro or silver bromoiodide emulsion.
  • Another object of the invention relates to the silver color bleaching material suitable for the method according to the invention.
  • iodide ions are formed in the top layer a), which diffuse through the intermediate layer b) to the bottom layer c) and there inhibit the spontaneous development of the veiled core-shell emulsion. This creates a positive silver image in this layer. After bleaching the dye and removing all remaining silver compounds, the desired negative color image is finally obtained in the bottom layer.
  • intermediate layers d) may also be arranged between the individual layer packages.
  • the highly sensitive silver haloiodide emulsion of layer a) can have its maximum sensitivity both inside and outside the spectral range of the complementary color of the image dye in layer c).
  • the trichromatic material described is characterized by particularly high sensitivity.
  • Silver halide crystals with a diffusion-inhibiting silver halide shell can be produced in a simple manner using the known core-shell technique.
  • Monodisperse emulsions are preferably used, the crystals of which are all within a relatively limited size range.
  • Such an emulsion is veiled on the grain surface by customary methods, e.g. B. by exposure or by means known per se, such as u. a. in DE-A-1 597 488, 2 801 127, U.S.-A-3 761 266 and in Research Disclosure 16 345 (1977).
  • the veiled crystals can also be treated with a development inhibitor which adheres to their surface by adsorption before being provided with a thin shell covering the development centers by further precipitation of silver halide.
  • All customary silver halides can be used as silver halide crystals to be coated, that is to say silver chloride, silver bromide and silver iodide or mixed crystals of two or all three components.
  • the crystals to be coated are as large as possible. It is therefore primarily used monodisperse emulsions, as known by known methods, for. B. can be made in cubic or octahedral crystal costume. The production of monodisperse emulsions is e.g. B. described in DE-A-1 904 148.
  • the shell to be applied can consist of another silver halide or the same silver halide (s) as the core.
  • the radius ratio of the core to the shell can also be varied within wide limits, particles which have a shell thickness that is relatively small in relation to the core diameter being primarily suitable for the present invention.
  • Another way of influencing the start of development of the core-veiled core-shell emulsions is to choose different concentrations of an ammonium or alkali metal sulfite in the developer solution.
  • the kinetics of spontaneous development can be controlled within wide limits by the sulfite concentration (2 to 100 g per liter of developing solution).
  • the start and speed of the development process can also be influenced by the use of development-retarding substances.
  • development-retarding substances can preferably be adsorbed on the veiled surface of the core before the shell is grown.
  • the core-shell technique makes it possible to carry out the usual surface-influencing photographic operations, such as, for example, on the silver halide crystals to be coated.
  • Suitable development inhibitors and retarders are e.g. B. benzotriazole, 2-mercaptobenzothiazole, N-methyl mercaptotriazole, phenyl mercaptotetrazole, triazolinedolizine and their derivatives.
  • 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. A. B. Cohen et al, Potographic Sci. and eng. 9.96, (1965)].
  • the veiling of the silver halide crystals, which then form the core of a core-shell particle, is carried out using customary methods, e.g. B. by diffuse exposure or with the usual chemical agents such.
  • silver bromide or silver chlorobromide emulsions are preferably used for their production. Smaller proportions of up to about 20 mole percent silver chloride can be used; Emulsions with higher silver chloride contents are generally too quick to develop.
  • the proportion of silver iodide should only be small and should not exceed about 1.0 mol percent, since otherwise the influencing of development by immigrant iodide ions, which is important for the process according to the invention, would not be guaranteed.
  • the silver halide shell to be applied can consist of a different silver halide (s), of the same silver halides but in different halide proportions or preferably of the same silver halide or the same silver halides in the same halide proportions as the core.
  • the surface of the emulsion core is still treated with a development retarder, this is advantageously done after the covering, but before the shell has grown.
  • all dyes which are generally used for the silver color bleaching process are suitable as bleachable dyes for the process according to the invention.
  • one of the subtractive basic dyes cyan, purple and yellow will be used in a layer package.
  • an additional separating layer d) must be arranged between two layer packets in this case.
  • the method is also suitable for producing monochromatic negative images, an important application relating to the production of negative black / white images, as can be obtained by using a bleachable black dye.
  • the dye of the negative images according to the invention takes on the role of the light-absorbing silver halide of normal photographic materials.
  • Bleachable dyes which are suitable for the process according to the invention are described, for example, in US Pat. Nos. 3,454,402, 3,443,933, 3,804,630, 3,716,368, 3,877,949, 3,623,874, 3,931,142 and 4,051,123 described.
  • the intermediate layers d) (barrier and separating layers) generally contain only pure binder, e.g. B. gelatin, but no dye and no silver halide. If it is favorable for the overall layer sequence, an already existing emulsion layer or a filter layer can optionally also serve as a separating layer.
  • the separating layer can contain further additives, such as substances which inhibit color bleaching, additional binders, such as, for example B. contain water-soluble colloids or water-insoluble dispersion polymers, also the usual additives for the construction of the other photographic layers such as plasticizers, wetting agents, light stabilizers, filter dyes, optical brighteners, UV absorbers or curing agents.
  • the highly sensitive silver haloiodide emulsions are normally those which contain silver chloride and / or bromide and silver iodide.
  • the iodide content is normally between 0.1 and 10, preferably 1 and 5 mol percent, the rest consists of silver chloride and / or bromide (e.g. 0 to 99.9 mol percent silver bromide).
  • Gelatin is usually used as a protective colloid to prepare these emulsions; It Kings - but NEN other water-soluble protective colloids such as polyvinyl alcohol or polyvinyl etc. are used; furthermore, part of the gelatin can be replaced by dispersions of non-water-soluble high-molecular substances. Common is z. B. the use of dispersion polymers of a ,, 8-unsaturated compounds such as acrylic acid esters, vinyl esters and vinyl ethers, vinyl chloride, vinylidene chloride and other mixtures and copolymers.
  • 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 exposed silver color bleaching materials are processed in the customary manner and include silver development, color bleaching, silver bleaching and fixing and subsequent rinsing and, if appropriate, also between the individual steps (see, for example, DE-A-2448443). Color bleaching and silver bleaching, and possibly also fixation, can be combined in a single treatment step. It is also possible to incorporate developer compounds or developer precursors into the emulsion layers. Suitable buffering ensures that these substances remain inactive in the dry layer during storage. In this case, all that is required to start development is an activator bath with a high pH, which can be free of developer substances.
  • Baths of conventional composition can be used for silver development, e.g. B. those that contain hydroquinone as developer or additionally 1-phenyl-3-pyrazolidinone, but do not contain silver complexing agents. It may also be advantageous if the silver developing bath, as described in Swiss Patent 405 929, additionally contains a color bleaching catalyst. Activator baths contain only strong alkalis and possibly other additives such as buffer substances, wetting agents etc. as active substances.
  • Combined color and silver color bleaching baths generally contain a water-soluble oxidizing agent in addition to the specified components.
  • Suitable color bleaching catalysts are primarily diazine compounds, e.g. B. in DE-B-2 010 280, 2 144 298 and 2 144 297, in FR-A-1 489 460, in US-A-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 it can.
  • 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, such as. B. p-nitrosodimethylaniline, nitro compounds such as. B. aromatic nitro compounds and preferably aromatic mono- or dinitrobenzenesulfonic acids, e.g. B. m-nitrobenzenesulfonic acid.
  • Reductones or water-soluble mercapto compounds are used in particular as antioxidants.
  • Suitable reductones are especially 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, cycloalphatic, 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, 423 819).
  • the silver fixing bath can be composed in a known and customary manner.
  • Suitable as a fixative is, for. B. sodium thiosulfate or preferably 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. B. contain hardening agents, wetting agents, optical retainers or UV protection agents.
  • a sample of the material coated in this way is exposed to green light under a gradient wedge and processed as follows: After processing has been completed, a negative, ie counter-rotating, black and white image of very high contrast (y ⁇ 5) is obtained.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Claims (11)

1. Procédé pour la formation d'images négatives en couleur selon la procédé de blachiment des couleurs à l'argent, par exposition d'un matériau photographique pour blanchiment des couleurs à l'argent, développement de l'argent, blanchiment de la couleur, blanchiment de l'argent et fixage, où le blanchiment de l'argent peut être éventuellement combiné au blanchiment de la couleur et/ou au fixage dans un bain de traitement unique, où le matériau photographique pour blanchiment des couleurs à l'argent est constitué d'un support ayant au moins un empilement de couches, dont chacun possède trois couches, caractérisé en ce que chaque empilement de couches, vu du côté entrée de la lumière
a) contient une première couche, qui contient une émulsion à l'halogéno-iodure d'argent, à haute sensibilité, ayant éventuellement subi une sensibilisation spectrale,
b) une couche intermédiaire ne contenant ni halogénure d'argent, ni colorant d'image,
c) une troisième couche, qui contient un colorant d'image blanchissable et une émulsion »Core-shell« (cristaux gainés), exempte d'iodure ou à faible teneur en iodure, dont les particules sont constituées d'un noyau d'halogénure d'argent, ayant subi un voilage superficiel et traité éventuellement par un retardateur de développement, et d'une enveloppe d'halogénure d'argent entourant ce noyau, cette émulsion pouvant être développée spontanément jusqu'à une densité maximale sous l'effet d'un révélateur,

que le matériau photographique, s'il est constitué de plusieurs empilements de couches, contient éventuellement entre les empilements de couches des couches intermédiaires d), et
que le développement a lieu dans une solution de développement exempte de complexants de l'argent.
2. Procédé selon la revendication 1, caractérisé en ce que le noyau et l'enveloppe d'une particule »Core-shell« sont constitués de bromure d'argent ou de chlorobromure d'argent, avec une teneur taximale de 20%-molaire de chlorure d'argent et 1,0%-molaire d'iodure d'argent.
3. Procédé selon les revendications 1 et 2, caractérisé en ce que le noyau d'une particule »Core-shell« est voilé par exposition préalable ou traitement chimique avant application de l'enveloppe, et est éventuellement traité par un retardateur de développement.
4. Procédé selon les revendications 1 à 3, caractérisé en ce que le noyau voilé d'une particule »Core-shell« est entouré d'une enveloppe d'halogénure d'argent non voilée ayant une épaisseur comprise entre 5 et 100 nm, de préférence entre 10 et 25 nm.
5. Procédé selon les revendications 1 à 4, caractérisé en ce qu'on utilise un matériau trichromatique constitué de trois empilements de couches constitués chacun de trois couches, ayant chacun un colorant d'image cyan, un colorant d'image magenta et un colorant d'image jaune dans les couches c), avec éventuellement des couches intermédiaires d) disposées entre les empilements de couches.
6. Procédé selon les revendications 1 à 5, caractérisé en ce que les émulsions à l'halogéno-iodure d'argent contiennent 0 à 99,9%-molaire de chlorure d'argent, 0 à 99,9%-molaire de bromure d'argent et 0,1 à 10, de préférence 1 à 5%-molaire d'iodure d'argent.
7. Procédé selon les revendications 1 à 6, caractérisé en ce qu'au moins l'une des couches intermédiaires b) se trouvant à l'intérieur des empilements de couches, et/ou des couches intermédiaires d) se trouvant entre les empilements de couches contient, outre le liant, d'autres substances comme des inhibiteurs de blanchiment, des colorants filtres, des agents de protection contre la lumière, des azurants optiques, des plastifiants, des absorbants UV ou des mouillants.
8. Procédé selon les revendications 1 à 7, caractérisé en ce qu'une substance révélatrice ou un précurseur de développement est incorporé dans au moins l'une des couches du matériau photographique et que, dans ce cas, on utilise pour le développement, à la place d'un bain de développement, un bain activateur fortement alcalin.
9. Procédé selon les revendications 1 à 8, caractérisé en ce qu'on utilise une solution de développement qui, pour assurer la régulation de la cinétique du développement spontané, contient 2 à 100 g/I d'un sulfite de métal alcalin ou d'ammonium.
10. Matériau photographique pour le blanchiment des couleurs à l'argent, pour la formation d'images négatives en couleur, constitué d'un support avec au moins un empilement de couches, constitué de trois couches par empilement, caractérisé en ce que chaque empilement de couches, vu du côté entrée de la lumière,
a) contient une première couche, qui contient une émulsion à l'halogéno-iodure d'argent, hautement sensible, ayant éventuellement subi une sensibilisation spectrale,
b) une couche intermédiaire ne contenant ni halogénure d'argent ni colorant d'image, et
c) une troisième couche, qui contient un colorant d'image blanchissable et une émulsion Core-shell (à cristaux gainés) exempte d'iodure ou à faible teneur en iodure, dont les particules sont constituées d'un noyau d'halogénure d'argent ayant subi un voilage de surface et éventuellement traité par un retardateur de développement, et d'une enveloppe d'halogénure d'argent entourant ce noyau et, si le matériau contient plusieurs empilements de couches, contient éventuellement des couches intermédiaires d) entre les empilements de couches.
EP81810291A 1980-07-22 1981-07-16 Procédé pour la formation d'images négatives en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé Expired EP0044813B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5589/80 1980-07-22
CH558980 1980-07-22

Publications (3)

Publication Number Publication Date
EP0044813A2 EP0044813A2 (fr) 1982-01-27
EP0044813A3 EP0044813A3 (en) 1982-11-17
EP0044813B1 true EP0044813B1 (fr) 1985-06-19

Family

ID=4296115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81810291A Expired EP0044813B1 (fr) 1980-07-22 1981-07-16 Procédé pour la formation d'images négatives en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé

Country Status (4)

Country Link
US (1) US4374914A (fr)
EP (1) EP0044813B1 (fr)
JP (1) JPH0151180B2 (fr)
DE (1) DE3171015D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0087390B1 (fr) * 1982-02-22 1986-10-08 Ciba-Geigy Ag Matériau photographique convenant pour le procédé de blanchiment des couleurs à l'argent et donnant une image négative
JPS59133542A (ja) * 1983-01-21 1984-07-31 Fuji Photo Film Co Ltd ハロゲン化銀カラー反転写真感光材料の現像方法
JPS6024546A (ja) * 1983-07-20 1985-02-07 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料
US4568189A (en) * 1983-09-26 1986-02-04 The United States Of America As Represented By The Secretary Of The Navy Apparatus and method for aligning a mask and wafer in the fabrication of integrated circuits
JPS60162252A (ja) * 1984-02-02 1985-08-24 Konishiroku Photo Ind Co Ltd ハロゲン化銀カラ−写真感光材料
JPS62261251A (ja) * 1986-05-07 1987-11-13 Matsushita Electric Ind Co Ltd 双方向通信装置の終話方法
US4995185A (en) * 1989-03-02 1991-02-26 Cheng Chiang Ming Picture plate using both transpiercing light and reflection light
JP3427212B2 (ja) * 1992-11-13 2003-07-14 松下電工株式会社 往復式電気かみそり

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH564795A5 (en) * 1970-11-03 1975-07-31 Mitsubishi Paper Mills Ltd Silver dye bleach material - of colour negative type with low-sensitivity prefogged/high sensitivity emulsions
US3708300A (en) * 1970-11-19 1973-01-02 Eastman Kodak Co Silver-dye-bleach photographic materials
JPS5121579A (en) * 1974-08-17 1976-02-20 Freunt Ind Co Ltd Zoryumataha koochinguekitono teiryokyusosochi
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.
DE3066277D1 (en) * 1979-08-01 1984-03-01 Ciba Geigy Ag Process for the production of masked positive colour images by the silver dye bleach process and the photographic silver dye bleach material for use therein

Also Published As

Publication number Publication date
JPS5753748A (fr) 1982-03-30
JPH0151180B2 (fr) 1989-11-01
DE3171015D1 (en) 1985-07-25
EP0044813A3 (en) 1982-11-17
US4374914A (en) 1983-02-22
EP0044813A2 (fr) 1982-01-27

Similar Documents

Publication Publication Date Title
DE2250050C2 (de) Farbphotographisches Aufzeichnungsmaterial
DE3241638C2 (de) Strahlungsempfindliche photographische Silberhalogenidemulsion und Verfahren zur Herstellung derselben
DE1547675A1 (de) Farbphotographisches Material fuer das Silberfarbbleichverfahren
DE3850221T2 (de) Photographische Elemente, die einen Bleich-Beschleuniger-Vorläufer enthalten.
DE2034064C3 (de) Farbfotografisches Aufzeichnungsmaterial
DE1522374C2 (de) Verfahren zur Herstellung eines direktpositiven photographischen Bildes
EP0044813B1 (fr) Procédé pour la formation d'images négatives en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé
DE3328755A1 (de) Lichtempfindliches photographisches aufzeichnungsmaterial
DE2831814C2 (de) Farbphotographisches Aufzeichnungsmaterial und Verfahren zur Herstellung maskierter positiver Farbbilder nach dem Silberfarbbleichverfahren
EP0044812B1 (fr) Procédé pour la formation d'images positives masquées en couleur selon le procédé de blanchiment des couleurs à l'argent et matériau photographique pour le procédé de blanchiment des couleurs à l'argent utilisé dans ce procédé
DE1472870C3 (de) Photographisches Aufzeichnungsmaterial
DE2157330A1 (de) Photographisches Aufzeichnungsmaterial mit einem Gehalt an mindestens einem in Gegenwart von Silber ausbleichbaren Farbstoff
DE2526091A1 (de) Photographisches aufzeichnungsmaterial fuer radiographische zwecke
DE2302676A1 (de) Photographisches mehrschichten-silberhalogenidmaterial fuer die verwendung in der farbphotographie
DE2243421A1 (de) Farbphotographisches material
EP0023888B1 (fr) 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
DE3231820A1 (de) Photographisches silberhalogenid-material
EP0244356A2 (fr) Méthode de préparation d'émulsions positives directes
DE2453641A1 (de) Mehrschichtiges farbphotographisches aufzeichnungsmaterial sowie verfahren zur herstellung positiver farbphotographischer bilder
DE2112728C3 (de) Farbphotographisches Aufzeichnungsmaterial
DE69205263T2 (de) Photographisches Umkehrelement und dessen Verarbeitungsverfahren.
DE2727090A1 (de) Farbphotographisches entwicklungsverfahren
EP0087390B1 (fr) Matériau photographique convenant pour le procédé de blanchiment des couleurs à l'argent et donnant une image négative
EP0035235A2 (fr) Procédé pour la réalisation d'images photographiques, matériaux photographiques propres à ce procédé et images obtenues au moyen de ce procédé
DE1952253B2 (de) Verfahren zum Entwickeln farbphotographischer Aufzeichnungsmaterialien

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19810718

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): BE CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3171015

Country of ref document: DE

Date of ref document: 19850725

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19890531

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19890615

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19890630

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19890703

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19890718

Year of fee payment: 9

ITTA It: last paid annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ILFORD AG

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19900716

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;ILFORD AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19900731

Ref country code: CH

Effective date: 19900731

Ref country code: BE

Effective date: 19900731

BERE Be: lapsed

Owner name: ILFORD A.G.

Effective date: 19900731

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910329

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19910403

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST