EP0620487B1 - Photographische Verarbeitungsverfahren - Google Patents

Photographische Verarbeitungsverfahren Download PDF

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Publication number
EP0620487B1
EP0620487B1 EP19940201047 EP94201047A EP0620487B1 EP 0620487 B1 EP0620487 B1 EP 0620487B1 EP 19940201047 EP19940201047 EP 19940201047 EP 94201047 A EP94201047 A EP 94201047A EP 0620487 B1 EP0620487 B1 EP 0620487B1
Authority
EP
European Patent Office
Prior art keywords
dev
developer
amplifier
forming
colour
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 - Lifetime
Application number
EP19940201047
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English (en)
French (fr)
Other versions
EP0620487A3 (de
EP0620487A2 (de
Inventor
Peter Jeffery C/O Kodak Limited Twist
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.)
Kodak Ltd
Eastman Kodak Co
Original Assignee
Kodak Ltd
Eastman Kodak Co
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 Kodak Ltd, Eastman Kodak Co filed Critical Kodak Ltd
Publication of EP0620487A2 publication Critical patent/EP0620487A2/de
Publication of EP0620487A3 publication Critical patent/EP0620487A3/de
Application granted granted Critical
Publication of EP0620487B1 publication Critical patent/EP0620487B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/3017—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction

Definitions

  • the present invention relates to photographic processes and is more particularly concerned with the processing of colour photographic paper using redox amplification chemistry.
  • Redox amplification processes have been described, for example in British Specification Nos. 1,268,126, 1,399,481, 1,403,418 and 1,560,572.
  • colour materials are developed to produce a silver image (which may contain only small amounts of silver) and then treated with a redox amplifying solution (or a combined developer-amplifier) to form a dye image.
  • the developer-amplifier solution contains a colour developing agent and an oxidising agent which will oxidise the colour developing agent in the presence of the silver image which acts as a catalyst.
  • Oxidised colour developer reacts with a colour coupler to form the image dye.
  • the amount of dye formed depends on the time of treatment or the availability of colour coupler and is less dependent on the amount of silver in the image as is the case in conventional colour development processes.
  • Suitable oxidising agents include peroxy compounds including hydrogen peroxide and compounds which provide hydrogen peroxide, eg addition compounds of hydrogen peroxide; cobalt (III) complexes including cobalt hexammine complexes; and periodates. Mixtures of such compounds can also be used.
  • a particular application of this technology is in the processing of silver chloride colour paper, especially such paper with low silver levels.
  • Redox amplification processes can be carried out in one a number of ways, for example, in a single developer/amplifier (DEV/AMP), in a developer followed by a peroxide (or other amplification agent) amplifier (DEV, AMP) containing no developing agent, in an amplifier followed by a developer or developer/amplifier (AMP, DEV or AMP, DEV/AMP) or in a developer followed by a developer/amplifier (DEV, DEV/AMP).
  • DEV/AMP peroxide (or other amplification agent) amplifier
  • a method of forming a photographic colour image by a redox amplification method from an imagewise exposed photographic silver halide material containing at least one dye image-forming colour coupler which comprises treating the material with one of the processing sequences:
  • the method of the present invention provides an improved Dmax when processing in a developer followed by either a peroxide amplifier containing no developing agent or a developer/amplifier.
  • the high concentration of colour developing agent needed for the single application process can be reduced in the first developer making it easier to replenish, less likely to crystallise-out and more resistant to discolouration from oxidised developing agent.
  • the material is treated in a developer as the first processing step.
  • the second processing step comprises treatment in an amplifier or developer/amplifier.
  • a wash step may be introduced between any of the processing steps defined above.
  • the material is treated in a developer and then an amplification bath and this sequence is repeated one or more times.
  • the sequence developer followed by developer/amplifier may be repeated or any combination of these steps may be employed as long as at least one step is repeated.
  • a particular application of this technology is in the processing of silver chloride colour paper, for example paper comprising at least 85 mole percent silver chloride, especially such paper with low silver levels, for example levels below 300 mg/m 2 , preferably below 200 mg/m 2 and especially below 150 mg/m 2 .
  • the photographic materials can be single colour elements or multicolour elements.
  • Multicolour elements contain dye image-forming units sensitive to each of the three primary regions of the spectrum.
  • Each unit can be comprised of a single emulsion layer or of multiple emulsion layers sensitive to a given region of the spectrum.
  • the layers of the element, including the layers of the image-forming units, can be arranged in various orders as known in the art.
  • the emulsions sensitive to each of the three primary regions of the spectrum can be disposed as a single segmented layer.
  • a typical multicolour photographic element comprises a support bearing a cyan dye image-forming unit comprised of at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, and a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler.
  • the element can contain additional layers, such as filter layers, interlayers, overcoat layers and subbing layers.
  • Preferred colour developing agents are p-phenylenediamines. Especially preferred are:
  • negative working silver halide a negative image can be formed.
  • positive (or reversal) image can be formed.
  • a developer and amplifier of the composition shown in Table 1 were made up and used to generate sensitometric strips.
  • the photographic colour paper used was currently available silver chloride-based colour paper hahving a total silver coverage of 670 mg/m 2 as the control and a similar paper having a total silver coverage of 145 mg/m 2 as the paper for the redox amplification process of the invention.
  • Component Developer Amplifier solution 1 1.2g/l 1.2g/l potassium carbonate 20.0g/l 20.0g/l potassium bromide 1.2mg/l - potassium chloride 0.35g/l - potassium sulphate 2.3g/l - solution 2 2.0ml/l - CD3 10.8g/l - pH 10.3 10.3 hydrogen peroxide (30% solution) - 5.0ml/l time 20.0s 10.0s temperature 35°C 35°C
  • Figure 2 illustrates an improvement in the Dmax values but the Dmax value obtainable for the red record is still below aim even though the CD3 level in the developer is higher than acceptable.
  • sensitometry can be achieved with full Dmax using the multiple application of the developer and amplifier in the same total process time as for a single application of the developer and amplifier.
  • the high concentration of colour developing agent needed for the single application process can be reduced in the developer making it easier to replenish, less likely to crystallize out and more resistant to discolouration from oxidised developing agent.

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

Claims (8)

  1. Verfahren zum Erzeugen eines fotografischen Farbbildes durch ein Redox-Verstärkungsverfahren aus einem bildweise belichteten fotografischen Silberhalogenidmaterial mit mindestens einem farbstoffbilderzeugenden Farbkuppler, welches die Behandlung des Materials mit einer der folgenden Verarbeitungsfolgen umfasst:
    DEV dann AMP,
    DEV dann DEV/AMP,
    AMP dann DEV, oder
    AMP dann DEV/AMP,
    wobei DEV Farbentwickler, AMP Verstärker und DEV/AMP Entwickler/Verstärker bedeutet, dadurch gekennzeichnet, dass das Material in einer Entwicklungs- und Verstärkungsfolge mehr als ein Mal behandelt wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Material in einem ersten Schritt in einem Entwickler behandelt wird.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der zweite Schritt das Behandeln in einem Verstärker oder Entwickler/Verstärker umfasst.
  4. Verfahren nach einen der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass Peroxid durch Wässern in Wasser oder in einer Sulfitlösung entfernt wird, welche zwischen der Behandlung in einer peroxidhaltigen Mischung und der Behandlung in einer entwicklungsmittelhaltigen Mischung erfolgt.
  5. Verfahren nach einen der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Verarbeitungsfolge in der genannten Reihenfolge folgende Schritte umfasst: entwickeln, verstärken, wässern (in Wasser oder Sulfitlösung), entwickeln und verstärken.
  6. Verfahren nach einen der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das fotografische Material Emulsionen mit mindestens 85% Silberchlorid umfasst.
  7. Verfahren nach einen der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das fotografische Material ein gesamtes Silberbeschichtungsgewicht von unter 300 mg/m2 aufweist (als Silber).
  8. Verfahren nach einen der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das fotografische Material ein mehrfarbiges fotografisches Material ist, welches einen Träger umfasst, der mindestens eine gelbfarbstoffbildende Einheit trägt, welche mindestens eine blauempfindliche Silberhalogenidemulsionsschicht umfasst, der mindestens ein gelbfarbstoffbildender Kuppler zugeordnet ist, weiterhin mindestens eine magentafarbstoffbildende Einheit, die mindestens eine grünempfindliche Silberhalogenidemulsionsschicht umfasst, der mindestens ein magentafarbstoffbildender Kuppler zugeordnet ist, und weiterhin mindestens eine zyanfarbstoffbildende Einheit, die mindestens eine rotempfindliche Silberhalogenidemulsionsschicht umfasst, der mindestens ein zyanfarbstoffbildender Kuppler zugeordnet ist.
EP19940201047 1993-04-13 1994-04-09 Photographische Verarbeitungsverfahren Expired - Lifetime EP0620487B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9307501 1993-04-13
GB939307501A GB9307501D0 (en) 1993-04-13 1993-04-13 Photographic processes

Publications (3)

Publication Number Publication Date
EP0620487A2 EP0620487A2 (de) 1994-10-19
EP0620487A3 EP0620487A3 (de) 1995-08-02
EP0620487B1 true EP0620487B1 (de) 2000-06-21

Family

ID=10733658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940201047 Expired - Lifetime EP0620487B1 (de) 1993-04-13 1994-04-09 Photographische Verarbeitungsverfahren

Country Status (4)

Country Link
EP (1) EP0620487B1 (de)
JP (1) JPH06313954A (de)
DE (1) DE69424965T2 (de)
GB (1) GB9307501D0 (de)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9114933D0 (en) * 1991-07-11 1991-08-28 Kodak Ltd Method for forming a photographic colour image

Also Published As

Publication number Publication date
DE69424965D1 (de) 2000-07-27
DE69424965T2 (de) 2001-01-11
EP0620487A3 (de) 1995-08-02
GB9307501D0 (en) 1993-06-02
JPH06313954A (ja) 1994-11-08
EP0620487A2 (de) 1994-10-19

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