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
  • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
  • G03C1/83—Organic dyestuffs therefor
  • G03C1/832—Methine or polymethine dyes
• • 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
  • G03C1/795—Photosensitive materials characterised by the base or auxiliary layers the base being of macromolecular 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
  • G03C11/00—Auxiliary processes in photography
  • G03C11/14—Pasting; Mounting

Definitions

• the photographic material employed requires higher image density than that of ordinary color paper.
• such a material inevitably requires much increased coating amounts of silver halide and coupler than ordinary color paper, which results in requiring as double processing time as ordinary color paper and therefore, makes it necessary to process the photographic material more rapidly.
• a dye is added to a hydrophilic colloid layer in order to absorb light of a specific wavelength for controlling a sensitivity of a photographic emulsion. Also, a dye is added to inhibit halation or irradiation for improving sharpness of a photographic material.
• the dyes used for these applications are requested to have prescribed spectral absorption characteristics for the respective applications; to be thoroughly decolored, readily eluted from a photographic material and thereby prevent stain on the material after processing; to exert no adverse effects to a photographic emulsion such as sensitization, desensitization and fogging; and to have good stability in a coating solution and a photographic material.
• the photographic material for display is requested to more strictly satisfy the above requirements since it contains a larger amount of dye in order to attain higher sharpness.
• oxonol dyes having two pyrazolone skeletons have been used as a useful dye that least adversely affect a photographic emulsion since they are decolored in a processing solution and readily eluted from a photographic material.
• the sensitization to an undesirable spectral range is liable to result in worse image quality because of color imbalance in a printing process. Fog is caused most likely by an eluted or decolored dye or its decomposed product activated in a processing solution.
• the larger sensitivity fluctuation by temperature or humidity variation results in lack of stable image quality depending on storage conditions such as temperature/humidity at a laboratory.
• the object of the present invention is to provide a rapidly processable silver halide light-sensitive photographic material containing a dye that is inert in an emulsion and capable of providing an image of high sharpness.
• a backlighting type silver halide light-sensitive photographic material for photodisplay having on one side of a support at least one silver halide emulsion layer, wherein the silver halide emulsion layer contains silver halide grains of 80 mole% or more silver chloride and a compound represented by following Formula I: wherein R1 to R6 independently represent a hydrogen atom, an alkyl group, an aryl group, an alkenyl group and a heterocyclic group, provided that one of R1 and R2 and one of R3 and R4 each represent the groups other than a hydrogen atom and that at least one of R1 to R6 has a water-soluble group or a substituent having a water-soluble group; L1 to L5 independently represent a methyne group; and m and n independently represent 0 or 1.
• At least one of the silver halide emulsion layers constituting the silver halide light-sensitive photographic material of the invention contains silver halide grains having 80 mole% or more silver chloride content.
• the photographic material comprises preferably a plurality of silver halide emulsion layers of different spectral sensitivities each having a 80 mole% or more silver chloride content.
• the silver halide grains comprise silver chloride of 99.9 to 99.5 mole%, preferably 99.8 to 99.9 mole%, silver bromide of 0.1 to 1.5 mole%, preferably 0.2 to 1.0 mole%, and silver iodide of 0 to 0.02 mole, preferably 0 mole%.
• the silver halide grains may be mixed with silver halide grains of different compositions.
• the silver halide grains of the high chloride content share not less than 80 mole%, preferably not less than 90 mole% in the total silver halide grains contained in the same layer.
• the size of the silver halide grains used for the invention is preferably 0.1 to 1.5 ⁇ m, more preferably 0.3 to 1.0 ⁇ m.
• the grain size can be measured by conventional methods used in the art.
• the size distribution of the silver halide grains may be either polydispersed or monodispersed.
• the monodispersed silver halide grains are preferable, in which a variation coefficient is not more than 0.22, preferably not more than 0.15.
• the silver halide grains can be prepared by the ammonia method, and neutral or the acid method.
• the silver salts and halides solutions are added by the double-jet method, and single-jet method, the reverse-precipitation method, and the conversion method.
• the silver halide grains prepared by the neutral method or the acid method are preferable since they are highly sensitive while they have low fog and excellent pressure resistance and safelight property.
• the silver halide grains of high chloride content used for the invention may be either a surface latent image type or an internal latent image type.
• the silver halide grains contain preferably 0.1 to 1.5 mole% of silver bromide. This silver bromide may be added at any step during formation of the silver halide grains and desalination, and during or after chemical ripening.
• bromide is incorporated into the photographic material after the desalination, it may be simply added in the form of water-soluble bromide, or by adding water soluble bromide and water soluble silver salt simultaneously or separately.
• Bromide may be localized either on the surface or inside of the grains, or otherwise, uniformly distributed from the core to the surface of the grains.
• Unnecessary salts may be removed from the emulsion preferably after the formation of the grains, and the emulsion may be subjected to chemical ripening and then to conventional chemical sensitization with sulfur compounds.
• the silver halide grains may be also subjected to noble metal sensitization, sulfur sensitization with active gelatin, selenium sensitization and reduction sensitization.
• the silver halide grains may be sensitized by various sensitizing dyes in order to provide the grains with a sensitivity to a prescribed spectral range.
• the preferred sensitizing dyes are cyanine dyes, merocyanine dyes and complex cyanine dyes.
• the alkyl groups represented by R1 through R6 are methyl, ethyl, propyl, isopropyl, butyl and t-butyl, each of which may have a substituent such as a hydroxy group, a sulfo group, a carboxyl group, a halogen atom, an alkoxy group, an aryl group, an aryloxy group, an alkoxycarbonyl group, and an aryloxycarbonyl group.
• the heterocyclic groups represented by R1 through R6 are a pyridyl group such as 2-pyridyl, 3-pyridyl, 4-pyridyl, 5-sulfo-pyridyl, 5-carboxy-2-pyridyl, 3,5-dichloro-2-pyridyl, 4,6-dimethyl-2-pyridyl, 6-hydroxy-2-pyridyl, 2,3,5,6-tetrafluoro-4-pyridyl, and 3-nitro-2-pyridyl; an oxazolyl group such as 5-sulfo-2-benzooxazolyl, 2-benzooxazolyl, and 2-oxazolyl, a thiazolyl group (e.g.
• R1, R2 and R3 independently represent an alkyl group, an alkenyl group, an aryl group and a heterocyclic group; R2 and R3 are preferably alkyl groups.
• the photographic material used in the invention may contain the dye represented by Formula I in the silver halide emulsion layers as an antiirradiation dye, or in the non-light sensitive hydrophilic colloid layers as a filter dye or an antihalation dye.
• the dye is usually incorporated into the photographic component layers by dissolving it in water or organic solvent such as alcohol, glycol, cellosolve, dimethylformaldehyde, dibutylphthalate and tricresylphosphate, if necessary, emulsifying, and then adding to a coating solution.
• organic solvent such as alcohol, glycol, cellosolve, dimethylformaldehyde, dibutylphthalate and tricresylphosphate
• An addition amount of the dye is 0.01 to 10 mg/dm2, preferably, 0.03 to 5.0 mg/dm2.
• the support used in the invention is preferably transparent or translucent.
• a translucent support containing white pigment is preferably used.
• a support of the invention is arbitrarily selected from those having an oxygen permeation rate of not more than 2.0 ml/m2.hr.atm.
• the support has preferably the oxygen permeation rate of not more than 1.0 ml/m2.hr.atm, and a plastic film can satisfy this requirement.
• the oxygen permeation rate is measured by a known method such as that specified in ASTM D-1434 Recommended Practice. This measurement method is also applicable to the present invention.
• the especially preferable is polyester since the oxygen permeation rate thereof is independent of humidity and, therefore it has the same oxygen permeation rate in a humid atmosphere as in a dry atmosphere.
• the thickness of the support is 150 to 250 ⁇ m, preferably 160 to 200 ⁇ m.
• an antihalation layer containing a material capable of absorbing light. This material has a function to prevent halation on the support by absorbing the light transmitted from the emulsion layers.
• the light-absorbing material is selected from various inorganic materials and dyes having this action.
• Example of the inorganic material is colloidal metal.
• Examples of the organic material for this purpose are dyes coupled with polymers for fixation (so-called mordant dye) so that the dye is not eluted into a color developer.
• the color developer may contain various conventional additives in addition to the above color developing agent.
• the photographic material is subjected to bleaching after color developing, and then to fixing. Bleaching and fixing may be carried out simultaneously in the same bath.
• the added amounts in the table are represented in g/m2, and the amounts of silver halide emulsion and colloidal silver are values converted to silver.
• Solutions A and B were added to 1000 ml of a 2% aqueous gelatin solution at 40°C in 30 minutes according to the double-jet method while keeping pAg at 6.5 and pH at 3.0, and then Solutions C and B were added in 180 minutes according to the double jet method while keeping pAg at 7.3 and pH at 5.5.
• DBP Dibutyl phthalate TOP : Trioctyl phosphate
• THP Trihexyl phosphate
• TCP Tricresyl phosphate
• TEHP Tri(2-ethylhexyl)phosphate
• TINP Triisononyl phosphate
• DCPP Dicresyl phenylphosphate

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Spectroscopy & Molecular Physics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)

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• 1990
  • 1990-03-21 EP EP90105288A patent/EP0388908B1/de not_active Expired - Lifetime

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