GB556360A - Improvements in or relating to photographic processes - Google Patents

Improvements in or relating to photographic processes

Info

Publication number
GB556360A
GB556360A GB121342A GB121342A GB556360A GB 556360 A GB556360 A GB 556360A GB 121342 A GB121342 A GB 121342A GB 121342 A GB121342 A GB 121342A GB 556360 A GB556360 A GB 556360A
Authority
GB
United Kingdom
Prior art keywords
emulsion
added
gelatin
sprayed
alcohol
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
GB121342A
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 GB121342A priority Critical patent/GB556360A/en
Publication of GB556360A publication Critical patent/GB556360A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Preparation (AREA)

Abstract

556,360. Photographic processes. BAKER, T. T. Jan. 28, 1942, No. 1213. [Class 98 (ii)] In a process wherein a sensitive emulsion is sprayed on to a surface and wherein the emulsion may be exposed and even developed and fixed while still in a wet gel state, the gelatin used for the production of the emulsion contains the optimum or maximum practicable proportion of gelatin B, i.e. that constituent of gelatin responsible for the gelling power. The support, which may be of metal, wood, plaster, concrete, or other smooth structural material, may be given a preparatory coating of a solution of synthetic resin or cellulose ester containing a white or coloured pigment, e.g. extended titanium dioxide. The gelatin may have a high melting point and low viscosity, and the emulsion may be sprayed at 30‹ C. A wetting agent, e.g. saponin, "Alborit," or " Lissapol" (Registered Trade Mark), may be added to the emulsion and to the preparatory coating. Alcohol, acetone, or suitable metallic salts may be added to the emulsion to produce low viscosity. The rate of development may be increased by adding to the emulsion cane sugar or similar material. In an example, the emulsion is prepared by adding silver nitrate solution containing sufficient ammonia to dissolve the silver hydroxide first precipitated in a fine stream at 27‹ C. to water containing soft gelatin, ammonium bromide, and potassium iodide. After 1 minute, an aqueous solution of silver nitrate at 50‹ C. is added, and after 15 minutes hard gelatin is added and dissolved. The emulsion is set in ice-water and the gel is shredded, washed, melted and digested. Alcohol and chrome alum are added. The emulsion may be stabilized by the addition of hydrobomic acid, and either sodium nitrate and citric acid or sodium biborate and boric acid. A wetting agent may also be added. The wet emulsion is exposed and sprayed with developing and fixing solutions. The emulsion may be colour developed. Specification 429,173 is referred to.
GB121342A 1942-01-28 1942-01-28 Improvements in or relating to photographic processes Expired GB556360A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB121342A GB556360A (en) 1942-01-28 1942-01-28 Improvements in or relating to photographic processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB121342A GB556360A (en) 1942-01-28 1942-01-28 Improvements in or relating to photographic processes

Publications (1)

Publication Number Publication Date
GB556360A true GB556360A (en) 1943-10-01

Family

ID=9718101

Family Applications (1)

Application Number Title Priority Date Filing Date
GB121342A Expired GB556360A (en) 1942-01-28 1942-01-28 Improvements in or relating to photographic processes

Country Status (1)

Country Link
GB (1) GB556360A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527267A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-sulfonic acid complexes, and their preparation
US2527263A (en) * 1945-11-19 1950-10-24 Ilford Ltd Photographic transfer materials bearing gelating anion soap complex silver halide layer
US2527261A (en) * 1944-10-30 1950-10-24 Ilflord Ltd Production of photographic silver halide emulsions from gelatinanion soap complexes
US2527268A (en) * 1944-10-30 1950-10-24 Ilford Ltd Production of photographic emulsions
US2527260A (en) * 1944-07-19 1950-10-24 Ilford Ltd Gelatino-silver halide emulsions having low setting temperatures and method of coating same
US2527262A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-anion soap complexes and their preparation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527260A (en) * 1944-07-19 1950-10-24 Ilford Ltd Gelatino-silver halide emulsions having low setting temperatures and method of coating same
US2527267A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-sulfonic acid complexes, and their preparation
US2527261A (en) * 1944-10-30 1950-10-24 Ilflord Ltd Production of photographic silver halide emulsions from gelatinanion soap complexes
US2527268A (en) * 1944-10-30 1950-10-24 Ilford Ltd Production of photographic emulsions
US2527262A (en) * 1944-10-30 1950-10-24 Ilford Ltd Photographic layers containing gelatin-anion soap complexes and their preparation
US2527263A (en) * 1945-11-19 1950-10-24 Ilford Ltd Photographic transfer materials bearing gelating anion soap complex silver halide layer

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