GB1097999A - Photographic emulsions - Google Patents

Photographic emulsions

Info

Publication number
GB1097999A
GB1097999A GB30575/66A GB3057566A GB1097999A GB 1097999 A GB1097999 A GB 1097999A GB 30575/66 A GB30575/66 A GB 30575/66A GB 3057566 A GB3057566 A GB 3057566A GB 1097999 A GB1097999 A GB 1097999A
Authority
GB
United Kingdom
Prior art keywords
silver halide
salt
boranes
amine
agno
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
GB30575/66A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and 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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1097999A publication Critical patent/GB1097999A/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
    • G03C5/315—Tanning development
    • 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
    • G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser

Landscapes

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

Abstract

1,097,999. Direct positive photographic emulsions. E.I. DU PONT DE NEMOURS & CO. July 7, 1966 [July 15, 1965], No. 30575/66. Heading G2C. A direct-positive photographic emulsion comprises a water-permeable binder, light-sensitive silver halide, 0À00033-12g. of an amine borane per mole of silver halide, and 1À5-325 mg. of a salt of a metal of Group VIII of the Periodic Table per mole of AgNO 3 used to prepare the silver halide. The metal salts may be RhCl 3 . 3H 2 O, Rh(NO 3 ) 3 or IrCl 4 . The amine boranes may have the general formula (R 1 )(R 2 )(R 3 )N:BH 3 , where R 1 , R 2 and R 3 and H or alkyl of 1-20 C atoms; or may be heterocyclic amine boranes e.g. pyridine-, picoline- or morpholine-boranes. The usual binders and supports are specified. The emulsion may be prepared by forming the silver halide from AgNO 3 and a soluble halide salt in a gelatine solution in the presence of the group VIII metal salt, and adding the amine borane at some stage during the preparation e. g. just before or after the digestion period.
GB30575/66A 1965-07-15 1966-07-07 Photographic emulsions Expired GB1097999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US47231365A 1965-07-15 1965-07-15

Publications (1)

Publication Number Publication Date
GB1097999A true GB1097999A (en) 1968-01-03

Family

ID=23875001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30575/66A Expired GB1097999A (en) 1965-07-15 1966-07-07 Photographic emulsions

Country Status (2)

Country Link
US (1) US3445235A (en)
GB (1) GB1097999A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756627A (en) * 1969-09-26 1971-03-01 Du Pont DIRECT POSITIVE EMULSIONS CONTAINING AMINO-BORANS AND BISMUTH DESALTS
BE757384A (en) * 1969-10-13 1971-04-13 Du Pont DIRECT POSITIVE PHOTOGRAPHIC EMULSIONS
US3637392A (en) * 1970-08-10 1972-01-25 Du Pont Direct-positive silver halide emulsions containing boron hydrides
JPS5140980B1 (en) * 1971-04-20 1976-11-06
DE2224837C3 (en) * 1972-05-20 1986-05-07 Agfa-Gevaert Ag, 5090 Leverkusen Direct positive photographic recording material
JPS5548292B2 (en) * 1972-06-17 1980-12-05
US4126472A (en) * 1974-02-24 1978-11-21 Fuji Photo Film Co., Ltd. Process of making a lithographic photosensitive silver halide emulsion having reduced susceptibility to pressure containing an iridium compound, a hydroxytetrazaindene and a polyoxyethylene
JPS5833543B2 (en) * 1979-06-28 1983-07-20 コニカ株式会社 photographic material
JPS62283328A (en) * 1986-04-19 1987-12-09 Konica Corp Silver halide emulsion and its production and silver halide photosensitive material using the same
US5192650A (en) * 1990-01-25 1993-03-09 Fuji Photo Film Co., Ltd. Silver halide color photographic material containing a color image stabilizer
US5411855A (en) * 1993-12-16 1995-05-02 Eastman Kodak Company Photographic element exhibiting improved speed and stability

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717833A (en) * 1952-05-12 1955-09-13 Sperry Rand Corp Direct positive emulsions
US3361564A (en) * 1964-08-27 1968-01-02 Du Pont Amine borane as fogging agent in direct positive

Also Published As

Publication number Publication date
DE1572140A1 (en) 1970-02-26
DE1572140B2 (en) 1975-08-07
US3445235A (en) 1969-05-20

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