EP0548124A1 - Agents stabilisants pour revelateurs a oxydoreduction. - Google Patents

Agents stabilisants pour revelateurs a oxydoreduction.

Info

Publication number
EP0548124A1
EP0548124A1 EP91915628A EP91915628A EP0548124A1 EP 0548124 A1 EP0548124 A1 EP 0548124A1 EP 91915628 A EP91915628 A EP 91915628A EP 91915628 A EP91915628 A EP 91915628A EP 0548124 A1 EP0548124 A1 EP 0548124A1
Authority
EP
European Patent Office
Prior art keywords
stabiliser
developer
agent
oxidising agent
redox amplification
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.)
Granted
Application number
EP91915628A
Other languages
German (de)
English (en)
Other versions
EP0548124B1 (fr
Inventor
Amanda Audrey Kodak Tannahill
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 EP0548124A1 publication Critical patent/EP0548124A1/fr
Application granted granted Critical
Publication of EP0548124B1 publication Critical patent/EP0548124B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • G03C7/302—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials with intensification of the image by oxido-reduction using peroxides

Definitions

  • This invention relates to stabilisers for RX developers.
  • Particularly the invention relates to the processing of photographic materials by redox amplification developer systems in order to ameliorate the inherent instability of such solutions.
  • these acids and their functional salts will stabilise oxidants such as peroxide even in the presence of the normal components of a redox amplification developer system, and that the presence of such acids and/or their functional salts has not only the effect of inhibiting the interaction between the colour developer and the stabiliser, thereby to increase the useful life of the developer solutions, but also beneficially effects the development process to enhance the developed quality of the image by markedly reducing the so of such systems to produce fogged products.
  • uric acid, phosphoric acid or its functional salts may be included in a coating on a photographic paper thereby to give improved fogging levels by inhibiting oxidant/colour developer interaction in situ.
  • a colour developer composition comprising an oxidising agent and a colour developing component, wherein the composition additionally comprises a stabiliser such as uric acid for the oxidising agent.
  • a stabiliser such as uric acid for the oxidising agent.
  • such composition includes at least one nitro-substituted nitrogen containing hetrocyclic anti-fogging compound.
  • a redox amplification colour developer composition comprising an oxidizing agent and a colour developing component, characterised in that said composition comprises a combined stabiliser and anti-fogging agent selected from uric or phosphoric acids. It is thus possible to dispense with separate anti-fogging agent per se.
  • the composition has a ratio of oxidizing agent to combine stabiliser in the range of 1 ml to 2 to 50 mg of the combined stabiliser, and preferably 1 ml of the agent to 5 - 20 mg of the acid.
  • a photographic paper having coated thereupon a stabiliser as set forth above for a redox amplification colour developer, thereby to inhibit fogging due to interaction between the stabiliser and the developer.
  • the figure annexed hereto shows the graph of the effect of uric acid in amplifying developers.
  • a multilayer colour paper, suitable for an "RX” process was prepared.
  • the paper was of a similar construction to current 2001 paper products with respect to the dispersions used, and the gel laydown.
  • "All chloride" emulsions were used and the silver concentrations for each layer were as follows - red sensitive layer 3.0mg/sqft., green sensitive layer 4.0mg/sqft., blue sensitive layer 6.4mg/sqft, giving a total weight of silver 13.4mg/sqft.
  • An initial developer was prepared using a potassium carbonate buffer, to which the required photographic reagents were added. Final developer composition is shown below.
  • the pH was adjusted to 10.3, with dilute NaOH, or H-SO. as required.
  • Blue D min is improved by the incorporation of uric acid in the amplifying developer, the improvement is best at the higher concentrations and is maintained over the test period.
  • Contrasts for the layers show variation, but the magnitude of the uric acid containing samples are reduced compared to the control which is an advantage.

Landscapes

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

Abstract

L'invention se rapporte à une composition de développement couleur par amplification redox, comprenant un agent oxydant et un constituant de développement couleur; la composition comprend un agent stabilisant destiné au constituant oxydant, qui est également efficace comme agent anti-voile. L'agent oxydant peut être du peroxyde d'hydrogène et l'agent stabilisant combiné peut être de l'acide urique ou phosphorique ou un de ses sels fonctionnels. L'invention se rapporte également à un papier photographique recouvert avec ledit agent stabilisant de révélateur couleur par amplification redox évitant, de ce fait, la formation d'un voile.
EP91915628A 1990-09-13 1991-08-30 Agents stabilisants pour revelateurs a oxydoreduction Expired - Lifetime EP0548124B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909020000A GB9020000D0 (en) 1990-09-13 1990-09-13 Stabilisers for rx developers
GB9020000 1990-09-13
PCT/EP1991/001655 WO1992005471A1 (fr) 1990-09-13 1991-08-30 Agents stabilisants pour revelateurs a oxydoreduction

Publications (2)

Publication Number Publication Date
EP0548124A1 true EP0548124A1 (fr) 1993-06-30
EP0548124B1 EP0548124B1 (fr) 1995-02-08

Family

ID=10682130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91915628A Expired - Lifetime EP0548124B1 (fr) 1990-09-13 1991-08-30 Agents stabilisants pour revelateurs a oxydoreduction

Country Status (5)

Country Link
EP (1) EP0548124B1 (fr)
JP (1) JPH06500863A (fr)
DE (1) DE69107307T2 (fr)
GB (1) GB9020000D0 (fr)
WO (1) WO1992005471A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707786A (en) * 1995-07-17 1998-01-13 Agfa-Gevaert Processing of color photographic silver halide materials

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5213336A (en) * 1975-07-23 1977-02-01 Fuji Photo Film Co Ltd Photographic image formation method
JPS613137A (ja) * 1984-06-15 1986-01-09 Fuji Photo Film Co Ltd 内部潜像型コア／シエル直接ポジハロゲン化銀乳剤及びその製造法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9205471A1 *

Also Published As

Publication number Publication date
DE69107307T2 (de) 1995-06-01
GB9020000D0 (en) 1990-10-24
WO1992005471A1 (fr) 1992-04-02
JPH06500863A (ja) 1994-01-27
DE69107307D1 (de) 1995-03-23
EP0548124B1 (fr) 1995-02-08

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