GB684248A - Improvements relating to colour photography - Google Patents

Improvements relating to colour photography

Info

Publication number
GB684248A
GB684248A GB3344/50A GB334450A GB684248A GB 684248 A GB684248 A GB 684248A GB 3344/50 A GB3344/50 A GB 3344/50A GB 334450 A GB334450 A GB 334450A GB 684248 A GB684248 A GB 684248A
Authority
GB
United Kingdom
Prior art keywords
silver halide
negative
uppermost
image
colour
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
GB3344/50A
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.)
Individual
Original Assignee
Individual
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
Priority to BE501158D priority Critical patent/BE501158A/xx
Application filed by Individual filed Critical Individual
Priority to GB3344/50A priority patent/GB684248A/en
Priority to US209710A priority patent/US2679456A/en
Publication of GB684248A publication Critical patent/GB684248A/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
    • 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
    • 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
    • G03C1/805—Photosensitive materials characterised by the base or auxiliary layers characterised by stripping layers or stripping means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/142—Dye mordant

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

684,248. Colour photography. FRAUNHOFER, H., VON, and BOMBACK, R. H. Feb. 2, 1951 [Feb. 9, 1950], No. 3344/50. Class 98 (ii). A negative comprising a support such as celluloid carrying three superimposed differentially sensitized silver halide emulsion layers of which the two lower layers contain colour formers and the uppermost, which may be blue sensitive and provided with the usual underlying yellow filter, is without colour former, is treated to develop the image in the uppermost layer, after which, without further treatment, the unreduced portions of silver halide of such layer are caused to transfer by diffusion onto another support and be there reduced to form a positive image in the manner described in Specification 614,155; and then the negative is further treated to produce coloured images in the two lower layers and to bleach out silver from all the layers and to bleach out the yellow filter when such is used. The positive image can be used to print off duplicate negatives in the usual way. The uppermost, blue sensitive layer of the negative may consist of a very " thin " or dilute coating of emulsion, possibly containing only 25 per cent of the normal amount of silver halide, since a " ghost " image only need be formed therein, resulting in a greater overall speed of the film, and such is developed in a normal silver halide developer but controlled as regards take-up quantity or controlled by addition of viscosity increasing substances. Specification 682,062 also is referred to.
GB3344/50A 1950-02-09 1950-02-09 Improvements relating to colour photography Expired GB684248A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE501158D BE501158A (en) 1950-02-09
GB3344/50A GB684248A (en) 1950-02-09 1950-02-09 Improvements relating to colour photography
US209710A US2679456A (en) 1950-02-09 1951-02-06 Color photography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3344/50A GB684248A (en) 1950-02-09 1950-02-09 Improvements relating to colour photography

Publications (1)

Publication Number Publication Date
GB684248A true GB684248A (en) 1952-12-17

Family

ID=9756543

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3344/50A Expired GB684248A (en) 1950-02-09 1950-02-09 Improvements relating to colour photography

Country Status (3)

Country Link
US (1) US2679456A (en)
BE (1) BE501158A (en)
GB (1) GB684248A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051637B (en) * 1954-09-15 1959-02-26 Hans Von Fraunhofer Process for the production of negatives from a negative color photographic material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032413A (en) * 1952-03-02 1962-05-01 Fraunhofer Hans Von Colour photographic processes and materials

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE337507A (en) * 1925-10-23
US1956274A (en) * 1930-11-04 1934-04-24 Daniel F Comstock Color photography
GB485862A (en) * 1935-12-07 1938-05-25 Ig Farbenindustrie Ag Improvements in colour photography
GB486107A (en) * 1936-09-28 1938-05-30 Kevin William Caton Webb Improvements relating to colour-photography
US2352014A (en) * 1941-07-21 1944-06-20 Rott Andre Photomechanical printing process and printing material for carrying out the same
US2367335A (en) * 1942-01-18 1945-01-16 Coote Harry Edward Color photography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1051637B (en) * 1954-09-15 1959-02-26 Hans Von Fraunhofer Process for the production of negatives from a negative color photographic material

Also Published As

Publication number Publication date
US2679456A (en) 1954-05-25
BE501158A (en)

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