GB440448A - Improvements in processes of photographic reproduction - Google Patents

Improvements in processes of photographic reproduction

Info

Publication number
GB440448A
GB440448A GB26973/34A GB2697334A GB440448A GB 440448 A GB440448 A GB 440448A GB 26973/34 A GB26973/34 A GB 26973/34A GB 2697334 A GB2697334 A GB 2697334A GB 440448 A GB440448 A GB 440448A
Authority
GB
United Kingdom
Prior art keywords
sensitizing
gelatin
bath
sept
dye
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
GB26973/34A
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.)
MARCEL GEORGES MARIE GASTON BI
Original Assignee
MARCEL GEORGES MARIE GASTON BI
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 MARCEL GEORGES MARIE GASTON BI filed Critical MARCEL GEORGES MARIE GASTON BI
Publication of GB440448A publication Critical patent/GB440448A/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
    • G03C1/66—Compositions containing chromates as photosensitive substances

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paints Or Removers (AREA)

Abstract

440,448. Chromated-colloid processes. BIZOT, M. G. M. G., 6, Chemin de la Croix, Champigny-sur-Marne, France. Sept. 19, 1934, No. 26973. Convention date, Sept. 19, 1933. [Class 98 (ii)] Unpigmented gelatin is sensitized, before or after application to a support, with a bath containing chromic acid and also, if desired, bichromate or other soluble chromium salt. After exposure to light, the gelatin is treated with a pigment or dye-bath which colours it in a inverse proportion to the exposure. A tanning agent such as alum or formaldehyde may be added to the sensitizing bath, or may be applied to the gelatin before sensitizing. Examples are given in the Specification of sensitizing baths, and of dye-baths containing aniline black or nigrosine with or without sodium sulphite, bisulphite, or carbonate. Reference is made to the sensitizing of pigmented gelatin with chromic acid.
GB26973/34A 1933-09-19 1934-09-19 Improvements in processes of photographic reproduction Expired GB440448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR440448X 1933-09-19

Publications (1)

Publication Number Publication Date
GB440448A true GB440448A (en) 1935-12-31

Family

ID=8900041

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26973/34A Expired GB440448A (en) 1933-09-19 1934-09-19 Improvements in processes of photographic reproduction

Country Status (1)

Country Link
GB (1) GB440448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102030A (en) * 1959-03-23 1963-08-27 Hoerner Hans Light sensitized polyamide body and method of making the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102030A (en) * 1959-03-23 1963-08-27 Hoerner Hans Light sensitized polyamide body and method of making the same

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