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WO1992004659A1 - Procede de blanchiment d'images argentiques - Google Patents

Procede de blanchiment d'images argentiques Download PDF

Info

Publication number
WO1992004659A1
WO1992004659A1 PCT/EP1991/001659 EP9101659W WO9204659A1 WO 1992004659 A1 WO1992004659 A1 WO 1992004659A1 EP 9101659 W EP9101659 W EP 9101659W WO 9204659 A1 WO9204659 A1 WO 9204659A1
Authority
WO
WIPO (PCT)
Prior art keywords
solution
silver
image
iodine
silver image
Prior art date
Application number
PCT/EP1991/001659
Other languages
English (en)
Inventor
Anthony Malcolm Barnett
David Alan Hallbery
Original Assignee
Kodak Limited
Eastman Kodak Company
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 Limited, Eastman Kodak Company filed Critical Kodak Limited
Priority to EP91915056A priority Critical patent/EP0547084B1/fr
Priority to DE69103424T priority patent/DE69103424T2/de
Publication of WO1992004659A1 publication Critical patent/WO1992004659A1/fr

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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/04—Retouching
    • 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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/40—Chemically transforming developed images
    • G03C5/42—Reducing; Intensifying

Definitions

  • This invention relates to a method of bleaching silver images and to solutions therefor.
  • the photographic silver halide image forming process is well known. Sometimes it is desirable to retouch the silver image formed thereby and, specifically, it is sometimes desired to remove parts of the image such as unwanted spots. It is known, for example from British specification 2 107 889 that a thickened solution containing, for example, iodine and an iodide can achieve the desired result. A problem with this approach is that a brown stain is produced which is unsightly. In addition the compositions of 2 107 889 are only suitable for printing plates which do not have any gelatin layers. It is therefore desirable to be able to delete the silver image without causing any stain and to delete the silver image in a gelatin- containing layer.
  • the present invention provides a method of removing silver images without causing any stain.
  • a method for bleaching a silver image wherein the image is treated with a first solution comprising iodine and an iodide salt and then the iodine stain is ..emoved by treating it with a second solution comprising ascorbic acid and sulphite ions.
  • the image is bleached rapidly and permanently, there is no stain and the solutions have a long life.
  • the silver image to be treated may be on an imagewise exposed and fully processed photographic film or paper or on a printing plate made by the photographic silver salt diffusion transfer process. Such materials are described in Research Disclosure Item 308119, December 1989 published by Kenneth Mason Publications, Emsworth, Hants, United Kingdom.
  • the solutions are applied to the silver image using "felt tipped" pens, preferably ones with a fine tip to ensure accurate application.
  • the first solution, used to delete the silver image preferably contains a mixture of water and butyrolactone.
  • the ratio of aqueous to organic solvent is optimised to provide sufficient water for rapid penetration of the solute into the gelatin layer on the image-bearing material, together with sufficient butyrolactone to obtain high complexing power for silver iodide so that the image is removed in a conveniently quick time.
  • the first may also contain other solvents used alone or in combination including alcohols eg ethyl or butyl alcohol.
  • the iodide may be provided by an ammonium or alkali metal iodide, eg sodium or potassium iodide.
  • the first solution preferably contains from 2 to 50g, especially from 20g to 45g, of iodine and from 50g to 250 g, especially from 150g to 200g, of iodide ions per litre.
  • the solvent preferably comprises from 10 to 60% by weight of water, the exact figures being dependent on the considerations outlined above.
  • the first solution also contains a wetting agent and an acid.
  • the second solution preferably contains from 10 to lOOg, especially from 40 to 80g, ascorbic acid and from 10 to lOOg, especially from 30 to 70g, of potasium sulphite per litre.
  • the solution is preferably aqueous.
  • the invention further provides a deletion fluid kit comprising the first and second solutions as defined above.
  • the solutions are each contained in a felt tip pen.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

Procédé de blanchiment d'une image argentique, selon lequel on trite l'image avec une première solution contenant de l'iode et un sel d'iodure, puis on enlève la tache d'iode en la traitant avec une seconde solution contenant de l'acide ascorbique et des ions de sulfite. Ce procédé est tout particulièrement adapté aux images argentiques formées par le processus de diffusion par transfert de sels d'argent.
PCT/EP1991/001659 1990-09-07 1991-09-03 Procede de blanchiment d'images argentiques WO1992004659A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91915056A EP0547084B1 (fr) 1990-09-07 1991-09-03 Procede de blanchiment d'images argentiques
DE69103424T DE69103424T2 (de) 1990-09-07 1991-09-03 Silberbildbleichverfahren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9019604.9 1990-09-07
GB909019604A GB9019604D0 (en) 1990-09-07 1990-09-07 Silver image bleaching process

Publications (1)

Publication Number Publication Date
WO1992004659A1 true WO1992004659A1 (fr) 1992-03-19

Family

ID=10681852

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001659 WO1992004659A1 (fr) 1990-09-07 1991-09-03 Procede de blanchiment d'images argentiques

Country Status (5)

Country Link
EP (1) EP0547084B1 (fr)
JP (1) JPH06500865A (fr)
DE (1) DE69103424T2 (fr)
GB (1) GB9019604D0 (fr)
WO (1) WO1992004659A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556357B1 (fr) * 1991-08-21 1998-02-11 Kodak Limited Solution et procede de lavage d'image argentique
FR2807171A1 (fr) * 2000-03-30 2001-10-05 Denise Marie Claude Tennerel Technique de decoloration sur support de collage photographique applicable dans le domaine graphique et pictural, creation de tableaux d'art
EP1431418A1 (fr) * 2002-12-19 2004-06-23 Wieland Dental + Technik GmbH & Co. KG Procédé d'enlèvement d'argent conducteur des pièces obtenues par électrodéposition
US20150257999A1 (en) * 2014-03-14 2015-09-17 Basil Michaels Ascorbic acid-based iodine stain remover and method of use

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE590919C (de) * 1931-10-28 1934-01-12 I G Farbenindustrie Akt Ges Verfahren zur Herstellung von optisch gut durchlaessigen Silberbildern
US2108261A (en) * 1934-09-19 1938-02-15 Paul H Jamieson Method of pictorial control and material for use therein
US2141354A (en) * 1937-04-23 1938-12-27 Cinecolor Inc Method of treating photographic film
US2206190A (en) * 1937-09-27 1940-07-02 Paul H Jamieson Method of pictorial control and material for use therein
US3423441A (en) * 1965-07-24 1969-01-21 Daiichi Yakuhin Sangyo Kk Process for preparation of iodinated lecithin
BE1002506A6 (nl) * 1988-09-05 1991-03-05 Drukinkten Arets Bv Met Beperk Korrektiemiddel voor fotografische emulsies.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE590919C (de) * 1931-10-28 1934-01-12 I G Farbenindustrie Akt Ges Verfahren zur Herstellung von optisch gut durchlaessigen Silberbildern
US2108261A (en) * 1934-09-19 1938-02-15 Paul H Jamieson Method of pictorial control and material for use therein
US2141354A (en) * 1937-04-23 1938-12-27 Cinecolor Inc Method of treating photographic film
US2206190A (en) * 1937-09-27 1940-07-02 Paul H Jamieson Method of pictorial control and material for use therein
US3423441A (en) * 1965-07-24 1969-01-21 Daiichi Yakuhin Sangyo Kk Process for preparation of iodinated lecithin
BE1002506A6 (nl) * 1988-09-05 1991-03-05 Drukinkten Arets Bv Met Beperk Korrektiemiddel voor fotografische emulsies.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WORLD PATENTS INDEX Week 8040, Derwent Publications Ltd., London, GB; AN 80-70519C & JP,A,55 109 210 (KURITA WATER IND KK) 23 August 1980 see abstract *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0556357B1 (fr) * 1991-08-21 1998-02-11 Kodak Limited Solution et procede de lavage d'image argentique
FR2807171A1 (fr) * 2000-03-30 2001-10-05 Denise Marie Claude Tennerel Technique de decoloration sur support de collage photographique applicable dans le domaine graphique et pictural, creation de tableaux d'art
EP1431418A1 (fr) * 2002-12-19 2004-06-23 Wieland Dental + Technik GmbH & Co. KG Procédé d'enlèvement d'argent conducteur des pièces obtenues par électrodéposition
US20150257999A1 (en) * 2014-03-14 2015-09-17 Basil Michaels Ascorbic acid-based iodine stain remover and method of use
US9364415B2 (en) * 2014-03-14 2016-06-14 Basil Michaels Ascorbic acid-based iodine stain remover and method of use

Also Published As

Publication number Publication date
DE69103424D1 (de) 1994-09-15
JPH06500865A (ja) 1994-01-27
DE69103424T2 (de) 1995-03-30
EP0547084B1 (fr) 1994-08-10
EP0547084A1 (fr) 1993-06-23
GB9019604D0 (en) 1990-10-24

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