US2611716A - Method of making a photographic sensitive element - Google Patents

Method of making a photographic sensitive element Download PDF

Info

Publication number
US2611716A
US2611716A US735528A US73552847A US2611716A US 2611716 A US2611716 A US 2611716A US 735528 A US735528 A US 735528A US 73552847 A US73552847 A US 73552847A US 2611716 A US2611716 A US 2611716A
Authority
US
United States
Prior art keywords
photographic
emulsion
making
sensitive element
photographic sensitive
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 - Lifetime
Application number
US735528A
Other languages
English (en)
Inventor
Robijns Willem
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.)
Gevaert Photo Producten NV
Original Assignee
Gevaert Photo Producten NV
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 Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Application granted granted Critical
Publication of US2611716A publication Critical patent/US2611716A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/95—Photosensitive materials characterised by the base or auxiliary layers rendered opaque or writable, e.g. with inert particulate additives

Definitions

  • the invention relates to'a photographic material, especially photographic paper, and to a method of manufacturing same.
  • the primary object of the present invention is I to generally improve photographic materials used toobta'in images with pastel-like appearance.
  • the silver halide is formed directly on the fibers of the velvety support by spraying aqueous solutions of silver nitrate and alkali halide thereupon.
  • the silver halide being precipitated directly on the fibers of the base, the solutions of the silver salt and alkali halide cannot be used in the most favorable proportions.
  • An important object of my invention is to provide a method of making photographic materials for images with pastel-like appearance whereby the emulsion is prepared before it is applied to the base. A more specific object is to prepare the emulsion in the presence of a protecting colloid.
  • the photographic material prepared according to the prior processes does not possess the desired properties, such as regularity, stability and high sensitivity.
  • the invention aims, therefore, at a photographic material which will not have the disadvantages of the prior art materials, but instead will embody more specific objects which will hereinafter ap- 2 I v pear, my invention resides in the photographic material and method of -making the same, as are more particularly described hereinafter.
  • the emulsion is completely prepared before it is applied to the velvety support.
  • the emulsion may be ripened, washed, digested, provided with the usual addition substances, and is finally coated upon a velvety support in the same way as other photographic emulsions.
  • I use an emulsion which in relation to the binder possesses a high content of silver.
  • gelatine silver halides are employed, the ratio of silver nitrate to gelatine must be at least 1.5 to 1. This ratio is also applicable to other light-sensitive substances.
  • the emulsion of the invention has a very low viscosity.
  • the viscosity of the finished emulsion shall not exceed the viscosity of a four percent aqueous solution of usual photographic gelatine.
  • each fibre will be completely surrounded by a thin coating of the light-sensitive layer. It has also been found that this lightsensitive colloid penetrates into the depth of the cavities formed by the loose fibres, thus giving the image an optimum appearance of depth.
  • the Solutions A and B are added to Solution 0 within 20 seconds at a temperature of 15 C. The
  • Method of manufacturing photographic material for obtaining photographic images with pastel-like appearance which comprises app y- Number WILLEM ROBIJ NS.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper (AREA)
US735528A 1946-06-28 1947-03-18 Method of making a photographic sensitive element Expired - Lifetime US2611716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE271386X 1946-06-28

Publications (1)

Publication Number Publication Date
US2611716A true US2611716A (en) 1952-09-23

Family

ID=3866896

Family Applications (1)

Application Number Title Priority Date Filing Date
US735528A Expired - Lifetime US2611716A (en) 1946-06-28 1947-03-18 Method of making a photographic sensitive element

Country Status (5)

Country Link
US (1) US2611716A (no)
BE (1) BE466293A (no)
CH (1) CH271386A (no)
DE (1) DE813229C (no)
GB (1) GB646140A (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936306A (en) * 1969-05-07 1976-02-03 Fuji Photo Film Co., Ltd. Process for producing gelatino-silver halide photographic light-sensitive materials having a high silver halide content

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190517303A (en) * 1905-08-26 1905-10-05 Ignaz Hoffsuemmer Improvements in and in the Manufacture of Photographic Papers.
US1593652A (en) * 1922-10-20 1926-07-27 Frank M Slough Photographic positive material
GB274075A (en) * 1926-07-07 1928-01-26 Aalrik Hooite Meursing Improvements in light sensitive paper or the like
US1752665A (en) * 1926-07-07 1930-04-01 Messrs A Meursing Process for the manufacture of sensitized velvet paper for photographical uses
US2006002A (en) * 1932-11-29 1935-06-25 Agfa Ansco Corp Manufacture of photographic silver halide emulsion layers
GB486252A (en) * 1936-05-02 1938-06-01 Gevaert Photo Prod Nv Improved photographic material
GB531243A (en) * 1939-03-27 1941-01-01 Kodak Ltd Improvements in gelatino silver halide photographic elements
GB555785A (en) * 1941-06-27 1943-09-08 Glenn L Martin Co Apparatus for photographic printing
US2384857A (en) * 1941-04-30 1945-09-18 Bennett F Terry Printing apparatus and method of preparing and using the same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB190517303A (en) * 1905-08-26 1905-10-05 Ignaz Hoffsuemmer Improvements in and in the Manufacture of Photographic Papers.
US1593652A (en) * 1922-10-20 1926-07-27 Frank M Slough Photographic positive material
GB274075A (en) * 1926-07-07 1928-01-26 Aalrik Hooite Meursing Improvements in light sensitive paper or the like
US1752665A (en) * 1926-07-07 1930-04-01 Messrs A Meursing Process for the manufacture of sensitized velvet paper for photographical uses
US2006002A (en) * 1932-11-29 1935-06-25 Agfa Ansco Corp Manufacture of photographic silver halide emulsion layers
GB486252A (en) * 1936-05-02 1938-06-01 Gevaert Photo Prod Nv Improved photographic material
US2192241A (en) * 1936-05-02 1940-03-05 Gevaert Photo Prod Nv Photographic layer and process of producing same
GB531243A (en) * 1939-03-27 1941-01-01 Kodak Ltd Improvements in gelatino silver halide photographic elements
US2384857A (en) * 1941-04-30 1945-09-18 Bennett F Terry Printing apparatus and method of preparing and using the same
GB555785A (en) * 1941-06-27 1943-09-08 Glenn L Martin Co Apparatus for photographic printing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936306A (en) * 1969-05-07 1976-02-03 Fuji Photo Film Co., Ltd. Process for producing gelatino-silver halide photographic light-sensitive materials having a high silver halide content

Also Published As

Publication number Publication date
BE466293A (no)
GB646140A (en) 1950-11-15
DE813229C (de) 1951-09-10
CH271386A (fr) 1950-10-31

Similar Documents

Publication Publication Date Title
US1600736A (en) Art of light-sensitive photographic materials
US2399083A (en) Photographic materials
US3109737A (en) Silver halide print-out emulsions combining cadmium iodide
US2305693A (en) Process of making photographs
US3482982A (en) Process for producing silver iodobromide photographic emulsion
US2725296A (en) Two-layer integral negative positive photographic material
US3477852A (en) Direct-positive silver halide emulsion resistant to kink-marking desensitization
US3849146A (en) Direct-print light-developable silver halide emulsion containing cyclic dioxide or selenone as sensitizer
US2364017A (en) Production of blue-black toned silver images
US2474700A (en) Diazotype sensitized papers having cellulose ether sizing
US2611716A (en) Method of making a photographic sensitive element
US3047392A (en) Photographic hydroxyethyl starch silver halide print-out composition
US2950972A (en) Photographic emulsions having increased sensitivity to x-ray and gamma ray radiation
US2585596A (en) Photographic emulsions containing 2, 5-dimethoxytetrahydrofuran
US2831766A (en) Gelatin coating compositions
US2377375A (en) Thiosalicylic acid antifoggant
US2129242A (en) Heat sensitive compositions
US2617727A (en) Alginate sized diazotype sensitized material
US2334215A (en) Photographic tracing cloth
US2517541A (en) Sensitive photographic emulsions
US2350124A (en) Photographic tracing cloth
US3520694A (en) Gelatin-silver halide compositions containing trihydric alcohols
US3305365A (en) Photosensitive material
US3173790A (en) Silver halide emusions containing polyoxyalkylene sensitizers
US2379373A (en) Photographic elements