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GB1420205A - Photographic process - Google Patents

Photographic process

Info

Publication number
GB1420205A
GB1420205A GB4764472A GB4764472A GB1420205A GB 1420205 A GB1420205 A GB 1420205A GB 4764472 A GB4764472 A GB 4764472A GB 4764472 A GB4764472 A GB 4764472A GB 1420205 A GB1420205 A GB 1420205A
Authority
GB
United Kingdom
Prior art keywords
complex
iii
silver halide
developer solution
cobalt
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
GB4764472A
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 GB1420205A publication Critical patent/GB1420205A/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
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/29—Development processes or agents therefor
    • G03C5/30—Developers
    • 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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/137—Cobalt complex containing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

1420205 Development processes EASTMAN KODAK CO 160ct 1972 [14 Oct 1971] 47644/72 Heading G2C An imagewise exposed silver halide emulsion is developed in the presence of a complex of trivalent cobalt or chromium. The co-ordination number of the Cr (III) and Co (III) complex is preferably six, the ligands being selected from ethylenediamine, diethylenetriamine, triethylenetetraamine, NH 3 , NO 3 , N 2 , N 3 , Cl, SCN, NCS, H 2 O, CO 3 and EDTA. The complex, which is a development accelerator, is present in either the silver halide material or the developer solution. The developer solution may also contain a nucleating agent e.g. formyl-4-methylphenylhydrazine. One complex, the cobalt hexammine (III) complex, also functions as an anti-foggant.
GB4764472A 1971-10-14 1972-10-16 Photographic process Expired GB1420205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18933171A 1971-10-14 1971-10-14

Publications (1)

Publication Number Publication Date
GB1420205A true GB1420205A (en) 1976-01-07

Family

ID=22696850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4764472A Expired GB1420205A (en) 1971-10-14 1972-10-16 Photographic process

Country Status (2)

Country Link
US (1) US3748138A (en)
GB (1) GB1420205A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923511A (en) * 1971-10-14 1975-12-02 Eastman Kodak Co Photographic process and composition employing CO(III) complexes and silver halide solvents
US3856524A (en) * 1971-10-14 1974-12-24 Eastman Kodak Co Photographic elements and processes for providing tanned image records
US3970458A (en) * 1971-10-14 1976-07-20 Eastman Kodak Company Imagewise hardening with inert transition metal complex oxidizing agents
US3847619A (en) * 1972-11-20 1974-11-12 Eastman Kodak Co Ion-paired cobaltic complexes and photographic elements containing same
US3891442A (en) * 1972-12-04 1975-06-24 Eastman Kodak Co Lithographic materials containing metal complexes
US3841873A (en) * 1973-05-21 1974-10-15 Eastman Kodak Co Cobalt (iii) complex amplifier baths in color photographic processes
US3887375A (en) * 1973-08-24 1975-06-03 Minnesota Mining & Mfg Restrainers for rapid access, air stable, regenerable, metal chelate developer solutions
US4002477A (en) * 1973-11-28 1977-01-11 Eastman Kodak Company Diffusion transfer processes and elements using or containing inert transitional metal complex oxidizing agents
US3901712A (en) * 1974-03-11 1975-08-26 Eastman Kodak Co Low concentration sensitization and development acceleration
US4195998A (en) * 1974-04-15 1980-04-01 Eastman Kodak Company CO(III) Complex containing radiation sensitive element with diazo recording layer
US3964912A (en) * 1974-09-09 1976-06-22 Eastman Kodak Company Ruthenium containing photographic developers
US3938998A (en) * 1975-03-28 1976-02-17 Minnesota Mining And Manufacturing Company Low contrast, rapid access, air stable, regenerable iron chelate developer solutions
CA1064311A (en) * 1975-09-02 1979-10-16 Vernon L. Bissonette Redox amplification process employing cobalt iii complex and peroxide as oxidizing agents
US4433037A (en) * 1982-07-15 1984-02-21 Eastman Kodak Company Heat erasable photographic element and process comprising silver halide
US5360712A (en) * 1993-07-13 1994-11-01 Eastman Kodak Company Internally doped silver halide emulsions and processes for their preparation
DE69423440T2 (en) * 1993-12-14 2000-07-06 Fuji Photo Film Co., Ltd. Surface latent image type photographic material containing silver halide grains doped with a cyano-chromium complex
GB9426275D0 (en) * 1994-12-24 1995-02-22 Kodak Ltd Photographic silver halide material having improved spectral characteristics
US6162599A (en) * 1998-01-30 2000-12-19 Agfa-Gevaert, N.V. Photosensitive image-forming element containing silver halide crystals which are internally modified with a metal ligand complex forming deep electron traps
GB0211049D0 (en) 2002-05-15 2002-06-26 Eastman Kodak Co Protection of photographic material

Also Published As

Publication number Publication date
US3748138A (en) 1973-07-24

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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