GB1292359A - Photographic dye developer diffusion transfer process - Google Patents

Photographic dye developer diffusion transfer process

Info

Publication number
GB1292359A
GB1292359A GB5771/70A GB577170A GB1292359A GB 1292359 A GB1292359 A GB 1292359A GB 5771/70 A GB5771/70 A GB 5771/70A GB 577170 A GB577170 A GB 577170A GB 1292359 A GB1292359 A GB 1292359A
Authority
GB
United Kingdom
Prior art keywords
silver halide
light
dye developer
emulsion layer
dye
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
GB5771/70A
Inventor
Paul Harold Stewart
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.)
Eastman Kodak Co
Original Assignee
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of GB1292359A publication Critical patent/GB1292359A/en
Expired 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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/02—Photosensitive materials characterised by the image-forming section
    • G03C8/08—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of organic compounds
    • G03C8/10—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of organic compounds of dyes or their precursors
    • G03C8/12—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of organic compounds of dyes or their precursors characterised by the releasing mechanism
    • G03C8/14—Oxidation of the chromogenic substances
    • G03C8/16—Oxidation of the chromogenic substances initially diffusible in alkaline environment

Landscapes

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

Abstract

1292359 Photographic dye developer diffusion transfer process EASTMAN KODAK CO 6 Feb 1970 [6 Feb 1969] 5771/70 Heading G2C A dye developer diffusion transfer process wherein a photographic material comprising a support bearing at least two dye image-forming units each comprising a light-sensitive silver halide emulsion layer and a dye developer in the emulsion layer or in a layer below (i.e. nearer the support) the silver halide emulsion layer, the silver halide in each emulsion layer being sensitive to a different region of the spectrum, and between the two units a stratum permeable to alkaline aqueous solution and composed of a water-insoluble polyvalent metal salt of a polymer, the polymer itself being film-forming, water-soluble and permeable to alkaline aqueous solution and containing free carboxylic acid groups, the stratum being less permeable to a dye developer in alkaline aqueous solution than a layer of the polymer itself, is exposed to a light image and developed and residual dye developers allowed to diffuse in register to a receiving layer, and wherein a catechol which is a silver halide developing agent and which has a chelating action on the polyvalent metal that is destroyed imagewise by oxidation as a function of the reduction of the light-struck silver halide to silver is present in the material during development, whereby the stratum is rendered more permeable to dye developer in the areas above the non-light-struck areas of the emulsion layer in the lower of said two dye image-forming units than in the areas above the light-struck areas thereof. The catechol may have the formula:- wherein R 1 , R 2 , R 3 and R 4 are each H, OH, halogen, carboxy, aryloxy, alkyl or aryl or wherein R 2 and R 3 or R 3 and R 4 taken together with the carbon atoms to which they are attached, and if these carbon atoms were joined by a single bond, represent the atoms necessary to form a cycloalkyl group. Preferred catechols are 4-phenyl,-3- isopropyl-, 4-t-butyl-, p-chloro- and 4-phenoxycatechol and catechol itself. The polyvalent metal salt of the polymer may be calcium alginate. The catechol may be in the sensitive material, receiving sheet or contained in an aqueous alkaline processing composition. The material may contain an auxiliary silver halide developing agent which is not a chelating agent for the polyvalent metal. Reference is made to Specification 1096343 and 1198150.
GB5771/70A 1969-02-06 1970-02-06 Photographic dye developer diffusion transfer process Expired GB1292359A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79728369A 1969-02-06 1969-02-06

Publications (1)

Publication Number Publication Date
GB1292359A true GB1292359A (en) 1972-10-11

Family

ID=25170397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5771/70A Expired GB1292359A (en) 1969-02-06 1970-02-06 Photographic dye developer diffusion transfer process

Country Status (8)

Country Link
US (1) US3617272A (en)
JP (1) JPS494330B1 (en)
BE (1) BE745489A (en)
CA (1) CA934207A (en)
CH (1) CH526797A (en)
DE (1) DE2005281C3 (en)
FR (1) FR2033882A5 (en)
GB (1) GB1292359A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299991A (en) * 1995-04-20 1996-10-23 Ag Technology Corp Chemical strengthening of glass

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4417064A (en) * 1981-01-05 1983-11-22 Polaroid Corporation Biphenyl compounds and method of preparing same
US4365072A (en) * 1981-10-22 1982-12-21 Polaroid Corporation Biphenyl aldehydes
JPS62185647U (en) * 1986-05-19 1987-11-26

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL214522A (en) * 1956-02-13 1900-01-01
BE627760A (en) * 1962-01-31
US3262781A (en) * 1962-07-05 1966-07-26 Polaroid Corp Photographic products
US3477849A (en) * 1964-03-23 1969-11-11 Eastman Kodak Co Multi-color dye developer systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2299991A (en) * 1995-04-20 1996-10-23 Ag Technology Corp Chemical strengthening of glass
US5900296A (en) * 1995-04-20 1999-05-04 Ag Technology Co., Ltd. Glass substrate for magnetic disk

Also Published As

Publication number Publication date
DE2005281A1 (en) 1970-08-27
US3617272A (en) 1971-11-02
BE745489A (en) 1970-07-16
CA934207A (en) 1973-09-25
CH526797A (en) 1972-08-15
FR2033882A5 (en) 1970-12-04
JPS494330B1 (en) 1974-01-31
DE2005281C3 (en) 1974-02-14
DE2005281B2 (en) 1973-07-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee