GB436576A - Improved manufacture of gelatine for photographic purposes - Google Patents

Improved manufacture of gelatine for photographic purposes

Info

Publication number
GB436576A
GB436576A GB55134A GB55134A GB436576A GB 436576 A GB436576 A GB 436576A GB 55134 A GB55134 A GB 55134A GB 55134 A GB55134 A GB 55134A GB 436576 A GB436576 A GB 436576A
Authority
GB
United Kingdom
Prior art keywords
gelatine
ripening
bodies
treated
acid
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
GB55134A
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
Application filed by Individual filed Critical Individual
Priority to GB55134A priority Critical patent/GB436576A/en
Priority to FR768015D priority patent/FR768015A/en
Priority to BE400763D priority patent/BE400763A/xx
Publication of GB436576A publication Critical patent/GB436576A/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
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
    • G03C1/047—Proteins, e.g. gelatine derivatives; Hydrolysis or extraction products of proteins

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

Gelatines from various sources, e.g. bones, calves' heads, skins or tendons, are treated, particularly for photographic purposes, to remove anti-ripening bodies, which are stated to be non-glutinous albuminous substances, with active carbon, silicic acid, or other adsorptive substances, or with dicalcium phosphate, followed by treatment with hydrogen peroxide for several hours, the hydrogen peroxide being rendered inactive with sulphur dioxide. An inert basic gelatine capable of extreme ripening is obtained, to which any desired amount of the extracted anti-ripening bodies or artificial bodies having the same effect may be added, together with sensitizers, e.g. cystin or arsenobenzenes, if desired. The anti-ripening bodies are recovered by treating the extracting agents with alkalis, and then neutralizing, e.g. with a suitable acid, e.g. nitric acid, which is employed in slight excess, followed by rapid concentration, preferably in vacuo. According to an example, 100 kg. gelatine in a 5-10 per cent solution is treated at 60 DEG C. with 15-40 kg. of active carbon. After one hour, the carbon is filtered off and treated with N/10 caustic soda solution at 20-30 DEG C. The solution is then made slightly acid with ZN nitric acid and rapidly concentrated, and then added as desired to the basic gelatine.
GB55134A 1934-01-06 1934-01-06 Improved manufacture of gelatine for photographic purposes Expired GB436576A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB55134A GB436576A (en) 1934-01-06 1934-01-06 Improved manufacture of gelatine for photographic purposes
FR768015D FR768015A (en) 1934-01-06 1934-01-06 Process for preparing gelatins for photochemical operations
BE400763D BE400763A (en) 1934-01-06 1934-01-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB55134A GB436576A (en) 1934-01-06 1934-01-06 Improved manufacture of gelatine for photographic purposes

Publications (1)

Publication Number Publication Date
GB436576A true GB436576A (en) 1935-10-14

Family

ID=9706362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55134A Expired GB436576A (en) 1934-01-06 1934-01-06 Improved manufacture of gelatine for photographic purposes

Country Status (3)

Country Link
BE (1) BE400763A (en)
FR (1) FR768015A (en)
GB (1) GB436576A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534599A (en) * 1946-07-25 1950-12-19 Elliott & Sons Ltd Stabilized gelatino silver halide photographic emulsion
US2852380A (en) * 1955-06-21 1958-09-16 Eastman Kodak Co Photographic emulsions and solutions containing silver salts of thioglycolic derivatives
US3086863A (en) * 1959-01-21 1963-04-23 Du Pont Photographic emulsions containing imidazoles

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449153A (en) * 1944-04-03 1948-09-14 Urbach Franz Photographic silver bromide emulsion sensitized with cysteine
DE966018C (en) * 1948-10-16 1958-10-02 Johann Garnweidner Process for preparing a photographic emulsion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2534599A (en) * 1946-07-25 1950-12-19 Elliott & Sons Ltd Stabilized gelatino silver halide photographic emulsion
US2852380A (en) * 1955-06-21 1958-09-16 Eastman Kodak Co Photographic emulsions and solutions containing silver salts of thioglycolic derivatives
US3086863A (en) * 1959-01-21 1963-04-23 Du Pont Photographic emulsions containing imidazoles

Also Published As

Publication number Publication date
BE400763A (en) 1934-02-28
FR768015A (en) 1934-07-30

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