CH406841A - Improved black-and-white photographic element, capable of creating, by forming an auxiliary image, an effect equivalent to an increase in the original sensitivity - Google Patents

Improved black-and-white photographic element, capable of creating, by forming an auxiliary image, an effect equivalent to an increase in the original sensitivity

Info

Publication number
CH406841A
CH406841A CH1184861A CH1184861A CH406841A CH 406841 A CH406841 A CH 406841A CH 1184861 A CH1184861 A CH 1184861A CH 1184861 A CH1184861 A CH 1184861A CH 406841 A CH406841 A CH 406841A
Authority
CH
Switzerland
Prior art keywords
creating
increase
forming
photographic element
auxiliary image
Prior art date
Application number
CH1184861A
Other languages
Italian (it)
Inventor
Luigi Dr Franchi
Original Assignee
Ferrania Spa
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 Ferrania Spa filed Critical Ferrania Spa
Publication of CH406841A publication Critical patent/CH406841A/en

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
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
CH1184861A 1960-10-31 1961-10-11 Improved black-and-white photographic element, capable of creating, by forming an auxiliary image, an effect equivalent to an increase in the original sensitivity CH406841A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1884260 1960-10-31

Publications (1)

Publication Number Publication Date
CH406841A true CH406841A (en) 1966-01-31

Family

ID=11153587

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1184861A CH406841A (en) 1960-10-31 1961-10-11 Improved black-and-white photographic element, capable of creating, by forming an auxiliary image, an effect equivalent to an increase in the original sensitivity

Country Status (2)

Country Link
CH (1) CH406841A (en)
GB (1) GB1009781A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025775A2 (en) * 1979-09-18 1981-03-25 Ciba-Geigy Ag Process for the production of a monochromatic colour image, and photographic material suited therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0025775A2 (en) * 1979-09-18 1981-03-25 Ciba-Geigy Ag Process for the production of a monochromatic colour image, and photographic material suited therefor
EP0025775A3 (en) * 1979-09-18 1982-05-12 Ciba-Geigy Ag Process for the production of a monochromatic colour image, and photographic material suited therefor

Also Published As

Publication number Publication date
GB1009781A (en) 1965-11-10

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