FR1136718A - Process for the production of direct positive photographic emulsions - Google Patents

Process for the production of direct positive photographic emulsions

Info

Publication number
FR1136718A
FR1136718A FR1136718DA FR1136718A FR 1136718 A FR1136718 A FR 1136718A FR 1136718D A FR1136718D A FR 1136718DA FR 1136718 A FR1136718 A FR 1136718A
Authority
FR
France
Prior art keywords
production
photographic emulsions
direct positive
positive photographic
emulsions
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
Other languages
French (fr)
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Application granted granted Critical
Publication of FR1136718A publication Critical patent/FR1136718A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/20—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
    • C07D239/22—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with hetero atoms directly attached to ring carbon atoms
    • 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
    • G03C1/48592—Positive image obtained by various effects other than photohole bleaching or internal image desensitisation, e.g. Sabatier, Clayden effect

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
FR1136718D 1954-12-10 1955-12-09 Process for the production of direct positive photographic emulsions Expired FR1136718A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35797/54A GB796873A (en) 1954-12-10 1954-12-10 Improvements in or relating to photographic emulsions

Publications (1)

Publication Number Publication Date
FR1136718A true FR1136718A (en) 1957-05-17

Family

ID=10381638

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1136718D Expired FR1136718A (en) 1954-12-10 1955-12-09 Process for the production of direct positive photographic emulsions

Country Status (5)

Country Link
US (1) US2901351A (en)
BE (1) BE543288A (en)
DE (1) DE1019171B (en)
FR (1) FR1136718A (en)
GB (1) GB796873A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE576568A (en) * 1958-03-11
BE608384A (en) * 1960-09-24
US3148066A (en) * 1961-06-29 1964-09-08 Eastman Kodak Co Nitramino and nitrosamino compounds as antifoggants for photographic emulsions
US3367779A (en) * 1965-01-21 1968-02-06 Fuji Photo Film Co Ltd Direct positive silver halide photographic materials
US3519428A (en) * 1965-05-21 1970-07-07 Keuffel & Esser Co Direct-positive light-sensitive photographic material
GB1260710A (en) * 1968-07-23 1972-01-19 Fuji Photo Film Co Ltd Developing photographic silver halide light-sensitive elements
GB1323111A (en) * 1970-04-01 1973-07-11 Agfa Gevaert Photographic direct positive silver halide material
BE785847A (en) * 1971-07-30 1973-01-05 Agfa Gevaert Nv DIRECT-POSITIVE SILVER HALOGENIDE EMULSIONS WITH DYE FORMERS
JPS4984639A (en) * 1972-12-19 1974-08-14

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB601824A (en) * 1945-10-04 1948-05-13 Elliott & Sons Ltd Improvements in photographic light sensitive emulsions
DE685901C (en) * 1935-08-31 1939-12-28 I G Farbenindustrie Akt Ges Process for fine grain development
US2173628A (en) * 1936-11-07 1939-09-19 Ilford Ltd Stabilization of photographic sensitive materials
GB508073A (en) * 1937-12-22 1939-06-22 John David Kendall Improvements in or relating to the stabilisation of photographic emulsions
GB707704A (en) * 1952-03-20 1954-04-21 Ilford Ltd Improvements in or relating to direct positive photographic emulsions

Also Published As

Publication number Publication date
BE543288A (en)
GB796873A (en) 1958-06-18
US2901351A (en) 1959-08-25
DE1019171B (en) 1957-11-07

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