GB555508A - Improvements in photographic materials and processes, especially processes relating to colour photography - Google Patents

Improvements in photographic materials and processes, especially processes relating to colour photography

Info

Publication number
GB555508A
GB555508A GB993941A GB993941A GB555508A GB 555508 A GB555508 A GB 555508A GB 993941 A GB993941 A GB 993941A GB 993941 A GB993941 A GB 993941A GB 555508 A GB555508 A GB 555508A
Authority
GB
United Kingdom
Prior art keywords
layer
silver iodide
iodide
silver
sensitive
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
GB993941A
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
Priority to GB593443A priority Critical patent/GB555699A/en
Priority to GB993941A priority patent/GB555508A/en
Publication of GB555508A publication Critical patent/GB555508A/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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/8255—Silver or silver compounds therefor
    • 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/26—Silver halide emulsions for subtractive colour processes

Landscapes

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

Abstract

555,508. Photographic sensitive materials ; colour photography. KODAK, Ltd. (Eastman Kodak Co.). Aug. 5, 1941, No. 9939. [Class 98 (ii)] Sensitive material comprises several sensitive emulsion layers and a superimposed filter or antihalation layer coated on the front or on the back and containing a dispersion of silver iodide absorbing ultra-violet rays strongly but substantially transparent to. visible rays. The iodide is in such quantity and of such particle size that the layer transmits not more than 15 per cent (preferably 10 per cent) from 400 to 300 mÁ and not less than 80 per cent from 450 to 700 mÁ The dispersion medium may be gelatin, albumen, casein, a polyvinyl phthalate or polyvinyl acetal resin. The material may be three-layer, for colour photography, with red and green sensitive layers below a blue-sensitive layer, and with an additional silver iodide layer on top of the bluesensitive layer. Preferably, the silver iodide is not fogged, by light or chemically; its sensitivity is so small that when the material is exposed to light and processed, the iodide layer will remain undeveloped when the other layers have been fully developed with an ordinary developer. Lippmann-type silver iodide emulsions are stated to be suitable for use as the silver iodide layer, and two examples are given of the preparation of gelatino-silver emulsions, one wholly silver iodide, and the other containing also a trace of silver bromide. Specifications 500,717 and 505,099, and U.S.A. Specifications 1,905,188 and 2,186,598 are referred to.
GB993941A 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography Expired GB555508A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB593443A GB555699A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography
GB993941A GB555508A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB993941A GB555508A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography

Publications (1)

Publication Number Publication Date
GB555508A true GB555508A (en) 1943-08-26

Family

ID=9881564

Family Applications (2)

Application Number Title Priority Date Filing Date
GB593443A Expired GB555699A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography
GB993941A Expired GB555508A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB593443A Expired GB555699A (en) 1941-08-05 1941-08-05 Improvements in photographic materials and processes, especially processes relating to colour photography

Country Status (1)

Country Link
GB (2) GB555699A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5550010A (en) * 1992-03-16 1996-08-27 Eastman Kodak Company Method for processing photographic products comprising a fine-grain top layer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571698A (en) * 1948-06-02 1951-10-16 Eastman Kodak Co Photographic masking process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5550010A (en) * 1992-03-16 1996-08-27 Eastman Kodak Company Method for processing photographic products comprising a fine-grain top layer

Also Published As

Publication number Publication date
GB555699A (en) 1943-09-02

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