GB1283218A - Direct positive silver halide photographic material and process - Google Patents

Direct positive silver halide photographic material and process

Info

Publication number
GB1283218A
GB1283218A GB44082/69A GB4408269A GB1283218A GB 1283218 A GB1283218 A GB 1283218A GB 44082/69 A GB44082/69 A GB 44082/69A GB 4408269 A GB4408269 A GB 4408269A GB 1283218 A GB1283218 A GB 1283218A
Authority
GB
United Kingdom
Prior art keywords
polymer
silver halide
derivative
contain
positive silver
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
GB44082/69A
Inventor
Kirby Mitchell Milton
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 GB1283218A publication Critical patent/GB1283218A/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
    • G03C1/00—Photosensitive materials
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
    • G03C1/043—Polyalkylene oxides; Polyalkylene sulfides; Polyalkylene selenides; Polyalkylene tellurides
    • 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
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged

Landscapes

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

Abstract

1283218 Direct-positive silver halide material and process EASTMAN KODAK CO 5 Sept 1969 [9 Sept 1968] 44082/69 Heading G2C A sensitive photographic material comprising a layer of a blue-sensitive direct-positive silver halide composition of which the silver halide comprises at least 50 mole per cent of silver chloride is exposed and treated with a 'lith' developer (i.e. one that contains a polyhydroxybenzene developing agent) in the presence of an alkylene oxide polymer or derivative thereof. The invention also comprises a material as defined above wherein an alkylene oxide polymer or derivative thereof is incorporated in the emulsion layer or an adjacent water-permeable layer. The polymer is preferably derived from ethylene, propylene or butylene oxide, most preferably ethylene oxide and may contain at least 4 ethylene oxide units. The ethylene oxide moiety may have an average molecular weight of 300 to 4000. The polymer may be a block copolymer of polyoxyethylene and polyoxypropylene containing from 10 to 70 per cent by weight of the polyoxyethylene units, the average molecular weight of the polyoxypropylene moiety being between 800 and 3000 or a water soluble organosilicone polyalkylene oxide polymer. The emulsion may contain an electron accepter e.g. a sensitizing dye, and/or a BSI compound (defined in Specification 1186718) e.g. a merocyanine dye. The material may contain an anium salt or a 3-pyrazolidone which increases the development rate. The use of the alkylene oxide polymer or derivative thereof increases the contrast of the images produced.
GB44082/69A 1968-09-09 1969-09-05 Direct positive silver halide photographic material and process Expired GB1283218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75858268A 1968-09-09 1968-09-09

Publications (1)

Publication Number Publication Date
GB1283218A true GB1283218A (en) 1972-07-26

Family

ID=25052265

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44082/69A Expired GB1283218A (en) 1968-09-09 1969-09-05 Direct positive silver halide photographic material and process

Country Status (6)

Country Link
US (1) US3615519A (en)
BE (1) BE738619A (en)
CH (1) CH522241A (en)
DE (1) DE1945450C3 (en)
FR (1) FR2017655A1 (en)
GB (1) GB1283218A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5141055B2 (en) * 1972-02-24 1976-11-08
JPS496918A (en) * 1972-05-09 1974-01-22
GB1463659A (en) * 1973-06-01 1977-02-02 Agfa Gevaert Development of exposed silver halide material in the presence of polyoxyalkylenes
US4009041A (en) * 1974-10-03 1977-02-22 Polaroid Corporation Fogged, direct-positive silver halide emulsion containing a gallium sulfide semiconductor
US4273862A (en) * 1977-06-11 1981-06-16 Mitsubishi Paper Mills, Ltd. Direct-positive silver halide photographic sensitive materials
DE2802016C2 (en) * 1978-01-18 1985-05-09 Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf Lith type photographic material
US5550013A (en) * 1994-12-22 1996-08-27 Eastman Kodak Company High chloride emulsions having high sensitivity and low fog and improved photographic responses of HIRF, higher gamma, and shoulder density
US6303284B1 (en) 2000-08-24 2001-10-16 Eastman Kodak Company Process for manufacture of photographic emulsion
US6326134B1 (en) 2000-08-24 2001-12-04 Eastman Kodak Company Process for manufacture of photographic emulsion
CN114509926A (en) * 2021-11-24 2022-05-17 福建中安高新材料研究院有限公司 Developing solution, preparation method thereof and developing method of photoresist

Also Published As

Publication number Publication date
DE1945450A1 (en) 1970-04-02
US3615519A (en) 1971-10-26
CH522241A (en) 1972-06-15
DE1945450B2 (en) 1978-10-12
BE738619A (en) 1970-02-16
FR2017655A1 (en) 1970-05-22
DE1945450C3 (en) 1979-07-05

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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