EP0579391A2 - Film pour la réproduction en couleur - Google Patents

Film pour la réproduction en couleur Download PDF

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Publication number
EP0579391A2
EP0579391A2 EP93304860A EP93304860A EP0579391A2 EP 0579391 A2 EP0579391 A2 EP 0579391A2 EP 93304860 A EP93304860 A EP 93304860A EP 93304860 A EP93304860 A EP 93304860A EP 0579391 A2 EP0579391 A2 EP 0579391A2
Authority
EP
European Patent Office
Prior art keywords
film
colour
image
layers
layer
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.)
Withdrawn
Application number
EP93304860A
Other languages
German (de)
English (en)
Other versions
EP0579391A3 (fr
Inventor
Albert Durr Edgar
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of EP0579391A2 publication Critical patent/EP0579391A2/fr
Publication of EP0579391A3 publication Critical patent/EP0579391A3/fr
Withdrawn legal-status Critical Current

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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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/3029—Materials characterised by a specific arrangement of layers, e.g. unit layers, or layers having a specific function

Definitions

  • the chromogenic monochrome films on the market today sandwich three emulsions together that develop chromogenically to three colours in standard colour developer.
  • This film is identical to colour film, except that the three levels have three speeds instead of three colour sensitivities.
  • the photographer selects the high, medium or low speed emulsion by selecting a red, green or blue filter in the enlarger.
  • three pictures are made simultaneously on three films, letting the printer select the optimal one.
  • the selection is made only on the image as a whole.
  • panchromatic paper must be used, which precludes the use of variable contrast paper and a bright safelight in the darkroom.
  • the second is that the technique is not extendable to colour film.
  • the bottom row 540 mixes the high and low curves. In the region where both high and low emulsions are responding, a blending of both images gives a signal to noise ratio superior to either individually.
  • the best weighting ratio for each density is known from statistical mathematics to be, for the lower layer, the S/N of the low divided by the S/N of the sum of both. For the high layer, the S/N of the high is divided by the same sum.
  • the invention employs image capture of a developing film multiple times during the development process.
  • the scans use a colour that does not expose the film and that is not absorbed by the antihalation dye, couplers, or layer separation dyes, normally infrared.
  • the timings of the scans give a normal, an extra long and an extra short development.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Facsimiles In General (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP93304860A 1992-07-17 1993-06-22 Film pour la réproduction en couleur. Withdrawn EP0579391A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91632292A 1992-07-17 1992-07-17
US916322 1992-07-17

Publications (2)

Publication Number Publication Date
EP0579391A2 true EP0579391A2 (fr) 1994-01-19
EP0579391A3 EP0579391A3 (fr) 1995-05-10

Family

ID=25437067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93304860A Withdrawn EP0579391A3 (fr) 1992-07-17 1993-06-22 Film pour la réproduction en couleur.

Country Status (3)

Country Link
EP (1) EP0579391A3 (fr)
JP (1) JP2910966B2 (fr)
CA (1) CA2093841C (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0377910A2 (fr) * 1989-01-12 1990-07-18 Agfa-Gevaert AG Matériau de reproduction photographique couleur négatif

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8506092D0 (en) * 1985-03-08 1985-04-11 Minnesota Mining & Mfg Photographic materials & colour proofing system
GB8609132D0 (en) * 1986-04-15 1986-05-21 Minnesota Mining & Mfg Photographic materials
JPH03155547A (ja) * 1989-11-13 1991-07-03 Konica Corp カラー写真感光材料

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0377910A2 (fr) * 1989-01-12 1990-07-18 Agfa-Gevaert AG Matériau de reproduction photographique couleur négatif

Also Published As

Publication number Publication date
CA2093841A1 (fr) 1994-01-18
EP0579391A3 (fr) 1995-05-10
CA2093841C (fr) 1996-12-03
JPH0695310A (ja) 1994-04-08
JP2910966B2 (ja) 1999-06-23

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