JPS5796331A - Production of silver halide emulsion for direct positive - Google Patents

Production of silver halide emulsion for direct positive

Info

Publication number
JPS5796331A
JPS5796331A JP17282680A JP17282680A JPS5796331A JP S5796331 A JPS5796331 A JP S5796331A JP 17282680 A JP17282680 A JP 17282680A JP 17282680 A JP17282680 A JP 17282680A JP S5796331 A JPS5796331 A JP S5796331A
Authority
JP
Japan
Prior art keywords
silver halide
halide emulsion
emulsion
water soluble
direct positive
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.)
Pending
Application number
JP17282680A
Other languages
Japanese (ja)
Inventor
Isao Kawamura
Akio Yoshida
Motoshige Yamada
Tamotsu Iwata
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.)
Mitsubishi Paper Mills Ltd
Original Assignee
Mitsubishi Paper Mills Ltd
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 Mitsubishi Paper Mills Ltd filed Critical Mitsubishi Paper Mills Ltd
Priority to JP17282680A priority Critical patent/JPS5796331A/en
Publication of JPS5796331A publication Critical patent/JPS5796331A/en
Pending 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
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To improve age stability by adding specific mercaptotriazoles to a silver halide emulsion after the end of physical maturation in producing a titled emulsion of high sensitivity by adding an electron acceptor, water soluble bromide, etc. to said emulsion. CONSTITUTION:After a fogging process of a silver halide emulsion for direct positive contg. >=50mol% silver chloride, an electron acceptor (e.g.; indole cyanine dye) or a halogen acceptor and the 1, 2, 4-triazoline-3-thion expressed by the formulaI(R1 is H, COR3, SO2R4; R2 is H, an aliphatic group, an aromatic group; R3, R4 are aliphatic groups, aromatic groups) or its deriv. are added thereto. Further, in order to increase sensitivity, required amts. of water soluble bromide and water soluble iodide are added, whereby a titled silver halide emulsion is obtained. The compound of the formulaIis embodied by compounds of the formulaI, formula III, etc.
JP17282680A 1980-12-08 1980-12-08 Production of silver halide emulsion for direct positive Pending JPS5796331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17282680A JPS5796331A (en) 1980-12-08 1980-12-08 Production of silver halide emulsion for direct positive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17282680A JPS5796331A (en) 1980-12-08 1980-12-08 Production of silver halide emulsion for direct positive

Publications (1)

Publication Number Publication Date
JPS5796331A true JPS5796331A (en) 1982-06-15

Family

ID=15949073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17282680A Pending JPS5796331A (en) 1980-12-08 1980-12-08 Production of silver halide emulsion for direct positive

Country Status (1)

Country Link
JP (1) JPS5796331A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6375738A (en) * 1986-09-19 1988-04-06 Fuji Photo Film Co Ltd Direct positive type silver halide photographic sensitive material
JPH02146035A (en) * 1988-11-28 1990-06-05 Fuji Photo Film Co Ltd Black and white silver halide photographic sensitive material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6375738A (en) * 1986-09-19 1988-04-06 Fuji Photo Film Co Ltd Direct positive type silver halide photographic sensitive material
JPH02146035A (en) * 1988-11-28 1990-06-05 Fuji Photo Film Co Ltd Black and white silver halide photographic sensitive material

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