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
  • G03C1/52—Compositions containing diazo compounds as photosensitive substances
• • 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
  • G03C1/043—Polyalkylene oxides; Polyalkylene sulfides; Polyalkylene selenides; Polyalkylene tellurides
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/135—Cine film

Definitions

• the present invention relates to light-sensitive material and more particularly to light-sensitive material based upon light-sensitive compounds such as diazo compounds and to a process of producing such a material.
• Light-sensitive material which utilizes the light-sensitivity of diazo compounds for producing photographic pictures are prepared according to the following two basically different processes:
• Both the diazo compound and the coupling agent are applied to or incorporated into the picture carrier or support. Development after exposure is mainly carried out by means of gaseous ammonia.
• the diazo compound is applied to or incorporated into the picture carrier. After exposure, of said light-sensitive carrier or support, the picture is developed by a treatment with an aqueous solution which contains the coupling agent.
• the diazo compound is directly incorporated into the picture carrier or support.
• the diazo compound is incorporated into a separate layer which is applied to the picture carrier or support.
• gelatin and other water-swellable substances such as polyvinyl alcohol, carboxy methyl cellulose, and others, have been suggested as layer-forming material. Polymers, which are soluble in organic solvents may also be used for this purpose.
• the diazo copying process has been used for cinematographic purposes by means of the so-called ozaphan film.
• the diazo compound is incorporated into the picture carrier or support itself. Due thereto it is necessary to keep the carrier or support extremely thin. This excludes the general usefulness of this type of film.
• (l) Layers containin the light-sensitive diazo compound and consisting of water-swellable colloids or polymers have a relatively low melting point when swollen and, therefore, will not permit processing with developers at a higher temperature.
• an especially inexpensive coupling agent namely fl-naphthol, is sufficiently soluble in hot water only, i.e., in water of a temperature above C.
• Another object of the present. invention is to provide a simple and effective process of making such a light-sensitive material.
• a further object of the present invention is to provide a process of using such a new and valuable light-sensitive copying material.
• the light-sensitive material according to the present invention comprises a picture carrier or support provided with a light-sensitive layer which combines the good properties of gelatin, such as its high absorptive power for aqueous solutions, with those of lacquer coatings, such as their high mechanical strength properties, their insensitivity to high temperatures, and their shortened drying time.
• a mixture of said two components is prepared and is used as binding agent for the light-sensitive compound, such as the diazo compound.
• a mixture of gelatin and lacquer forming substances is prepared by using said lacquer-forming substances in the form of their aqueous dispersions.
• Suitable aqueous dispersions are, for instance, the commercial latex-like preparations.
• the following components are mixed with each other in a suitable proportion in order to produce highly resistant layers, which permit rapid development at a high temperature:
• Hydrophilic, water-soluble or at least water-swellable, film-forming colloids such as gelatin, polyvinyl alcohol, polyacrylate, polyvinyl pyrrolidone, carboxy methyl cellulose, and the like.
• Hydrophobic, substantially water-insoluble materials serving as supporting framework for said hydrophilic colloids such as butadiene copolymers, or other copolymers with acrylonitrile, polyvinyl acetate, polyvinyl propionate, polyvinyl chloride and other lacquer-forming substances. These materials are-used in the form of their aqueous latex-like dispersions which are miscible with said hydrophilic colloids and, after drying, yield a film meeting the requirements of light-sensitive layers, namely transparency, homogeneous surface, castability.
• the mechanical strength properties and the perme ability for aqueous solutions of light-sensitive layers prepared from such mixtures is dependent upon the respective proportion of the components in the mixture. By selecting suitable proportions it is possible to adjust to the specific requirements in any desired manner the mechanical properties as well as the permeability of the layer to aqueous solutions and to control the speed of development.
• diazo compounds Since the purpose of the present invention is primarily the production of an inexpensive material for making film copies, it is the preferred procedure to use diazo compounds as light-sensitive substances.
• the layers composed according to the present invention as described hereinabove may also be used as carrier or support for other light-sensitive materials such as light-sensitive silver, iron, chromium salts and the like light-sensitive inorganic and organic compounds, provided their properties are adapted to the desired purpose.
• light-sensitive materials such as light-sensitive silver, iron, chromium salts and the like light-sensitive inorganic and organic compounds, provided their properties are adapted to the desired purpose.
• a further advantage of the layers according to the present invention which swell in aqueous solutions only to a slight extent, is to be seen in the fact that, in contrast to conventional gelatin layers, the drying process, after processing the light-sensitive material, is shortened considerably.
• the high mechanical resistance of the lightsensitive layers permits to remove most of the adhering water by mechanically wiping it off.
• the small amounts of water which are contained in the only slightly swollen layer are evaporated within a very short period of time, especially since the high temperature resistance of the layer permits drying at a very considerably higher temperture than heretofore possible with gelatin layers.
• a latex containing a styrene-butadiene copolymer as it is sold, for instance, as Latex GRS III by the firm B. F. Goodrich Chemical Co., is adjusted to a solids content by diluting it with water (Solution B).
• 250 cc. of Solution A, 250 cc. of Solution B, and 250 cc. of Solution C are processed at a temperature of about 35 C. to a homogeneous mixture. After filtration to eliminate impurities and air bubbles, the resulting filtered solution is cast upon a support of cellulose triacetate provided with the conventional subbing coating. Conventional emulsion casting machines are used for this purpose. After drying, a film of high mechanical strength at a processing temperature between 70 C. and 80 C. is obtained. Such a light-sensitive material, after exposure,
• diazo compound used in the preceding example there may be employed other light-sensitive diazo compounds, such as the 4-diazonium dialkyl anilines, N-acyl derivatives of mono-diazotized p-phenylene diamine, 4-diazonium-2,5-dialkoxy diphenyls, 4-diazonium-2,5-dialkoxy diphenyl sulfides, and others as they are conventionally used in light-sensitive materials of the diazo type.
• diazo compounds such as the 4-diazonium dialkyl anilines, N-acyl derivatives of mono-diazotized p-phenylene diamine, 4-diazonium-2,5-dialkoxy diphenyls, 4-diazonium-2,5-dialkoxy diphenyl sulfides, and others as they are conventionally used in light-sensitive materials of the diazo type.
• light-sensitive compounds which have proved to be useful in the claimed light-sensitive material are, for instance, silver halogenides, and iron salts.
• Compounds which are sensitive to other types of irradiation than to light are, for instance, silver halogenides which are sensitive to X-rays and also to ultraviolet rays. They may also be used for the purpose of the present invention.
• Water-swellable film-forming colloids in place of gelatin, polyvinyl alcohol, carboxy methyl cellulose, and others.
• Water insoluble polymers which are soluble in suitable organic solvents and which are useful as supporting framework for the water-swellable colloid are not only the styrene-butadiene polymer latex but also polyethylene, polypropylene, chlorinated rubber, alkyd resins.
• coupling agents there are used the known coupling agents such as all phenols capable of coupling with diazo compounds such as p-naphthol, phloroglucinol, resorcinol, either along or in mixture with each other.
• the supporting layer may not only consist of cellulose acetate but also of other film-forming materials as they are known in photographic films.
• the proportion of water-swellable material and waterinsoluble framework material used as carrier for the light-sensitive compound may be between about 1:0.2 and 1:4 and preferably between 120.3 and 120.7 depending upon the desired properties of the resulting lightsensitive material.
• Irradiation-sensitive material adapted for development by aqueous developer solutions, said material consisting of a supporting water-insoluble film base and a layer sensitive to irradiation on said film base, said irradiation-sensitive layer consisting of an intimate mixture of (a) gelatin, and
• An irradiation-sensitive casting solution for providing an irradiation-sensitive layer which, on casting upon a supporting film base, forms therewith an irradiation-sensitive material adapted for development by aqueous developer solutions, said casting solution consisting of an intimate mixture of (a) an aqueous gelatin solution,

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• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• General Physics & Mathematics (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

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Cited By (3)

Citations (3)

• 1965
  • 1965-08-10 DE DE19651572155 patent/DE1572155A1/de active Pending
• 1966
  • 1966-06-20 BE BE682763D patent/BE682763A/xx unknown
  • 1966-08-05 US US570407A patent/US3529965A/en not_active Expired - Lifetime

Patent Citations (3)

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