EP0782045B1 - Filmphotographique en couleur à l'halogénure d'argent ayant un support en plastique capable d'être marqué par un laser - Google Patents

Filmphotographique en couleur à l'halogénure d'argent ayant un support en plastique capable d'être marqué par un laser Download PDF

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Publication number
EP0782045B1
EP0782045B1 EP19960120156 EP96120156A EP0782045B1 EP 0782045 B1 EP0782045 B1 EP 0782045B1 EP 19960120156 EP19960120156 EP 19960120156 EP 96120156 A EP96120156 A EP 96120156A EP 0782045 B1 EP0782045 B1 EP 0782045B1
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EP
European Patent Office
Prior art keywords
layer
compounds
silver halide
film element
light
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EP19960120156
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German (de)
English (en)
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EP0782045A1 (fr
Inventor
Geert Vercruysse
Jean Burtin
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Agfa Gevaert NV
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Agfa Gevaert NV
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Priority to EP19960120156 priority Critical patent/EP0782045B1/fr
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    • 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
    • G03C1/815—Photosensitive materials characterised by the base or auxiliary layers characterised by means for filtering or absorbing ultraviolet light, e.g. optical bleaching
    • G03C1/8155—Organic compounds therefor
    • 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
    • G03C1/91—Photosensitive materials characterised by the base or auxiliary layers characterised by subbing layers or subbing means
    • 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
    • G03C1/91—Photosensitive materials characterised by the base or auxiliary layers characterised by subbing layers or subbing means
    • G03C1/93—Macromolecular substances therefor
    • 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
    • G03C11/02—Marking or applying text
    • 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/22—Subtractive cinematographic processes; Materials therefor; Preparing or processing such materials
    • 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
    • G03C2200/00—Details
    • G03C2200/23—Filter dye
    • 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
    • G03C2200/00—Details
    • G03C2200/35—Intermediate layer
    • 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
    • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
    • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
    • G03C7/3029—Materials characterised by a specific arrangement of layers, e.g. unit layers, or layers having a specific function

Definitions

  • the present invention relates to silver halide colour photographic film elements having a thermoplastic support that are capable of being marked by means of a laser.
  • Well-known transparent film supports used for silver halide photographic projection film elements or photographic film sheets to be examined as for e.g. colour print film applications can be e.g. cellulose triacetate, a polyester like a polyalkylene terephthalate or naphthalate e.g. polyethylene terephthalate or polyethylene napthalate, or polycarbonate.
  • marking of such elements, before or after exposure to heat or radiation can be performed by means of mechanical or chemical methods, by heat or radiation, wherein said technique of radiation may be performed by means of a laser beam, travelling over the zone of film that should be marked.
  • Marks added to a photographic film element may be e.g. graphic elements, characters, bar codes or text.
  • the quality of the result depends on the nature of the emulsion(s) and on the background density of the images on which the subtitles are to be etched.
  • Working parameters in particular the power of the laser beam radiation applied to the film and the displacement speed of the laser beam, are determining the sharpness of the subtitles to a large extent.
  • the power, the exposure time and the wavelength are selected so as to destroy the photographic image forming emulsion elements completely at points where the laser beam strikes the film. Due to the nonuniform release of gelatinous residues, gelatin present as a main protective hydrophilic colloid in the coated photographic layers, or to the damage of the support and as a result thereof leaving dark spots and coloured spots, an unquiet and unpleasant enlarged view is projected on the screen in the cinema.
  • EP-A 0 201 391 A method and apparatus for subtitling colour multilayer motion pictures or photographic plates by means of continuous or broken lines with a laser have been described in EP-A 0 201 391. Another method and apparatus makes use of a mask to produce subtitles and has been described in EP-A 0 282 611. Further EP-A 0 464 270 describes the application of a protective layer over at least portions of a film or tape, whereupon characters should be written by means of a laser beam.
  • Said method essentially comprises the steps of travelling the laser beam over the film at a speed of displacement V lying in the range from about 1 to about 200 cm/s with a power of the laser P lying in the range of about 100 mW to about 20 W, in order to have a ratio V/P lying in the range from 10 to 30, followed by a washing step in order to remove particles that have been heated and disclocated from the zones of the film that have previously been marked by the low power laser beam.
  • the method is well adapted to subtitle motion picture films on a support constituted by a cellulose derivative such as cellulose triacetate, but is equally applicable to film supports based on a thermoplastic polymer material, such as polyester.
  • a transparant polyester support such as e.g. polyethylene terephthalate
  • lowering of the power of the laser results in grayish or slightly yellow coloured zones.
  • a silver halide colour photographic film element wherein said element is a colour photographic motion picture projection film element comprising a transparent thermoplastic film support having a subbing layer unit and coated thereon in succession, a blue-sensitive silver halide emulsion layer comprising a yellow-forming coupler, an intermediate layer, a red-sensitised silver halide emulsion layer comprising a cyan-forming coupler, an intermediate layer, a green-sensitised silver halide emulsion layer comprising a magenta-forming coupler, and an antistress layer characterised in that
  • Thermoplastic polyesters are substantially composed of linear saturated polyester.
  • Preferred are homopolymers or copolymers having one recurring unit or at least two different recurring units such as polyalkylene terephthalate or polyalkylene naphthalate.
  • Typical examples are butylene terephthalate, ethylene terephthalate, butylene naphthalene dicarboxylate and ethylene naphthalene dicarboxylate, or mixtures of these.
  • Examples of the homopolymers are polybutylene terephthalate, polyethylene terephthalate, polybutylene napthalene dicarboxylate, polyethylene napthalene dicarboxylate and mixtures thereof.
  • the transparent polyester film support with a primer coating or a subbing layer before the application of further silver halide photographic emulsion layers.
  • An interesting primer coating for application between e.g. a polyethylene terephthalate support and the said hydrophilic layers has been described e.g. in US-A 4,132,552.
  • Said primer coating, also called “subbing layer” is substantially composed of at least one hydrophobic layer directly contacting the transparant film support and at least one hydrophilic layer coated thereupon.
  • the said subbing layer comprising at least one hydrophobic polymer together with the adjacent hydrophilic layer coated thereupon forms the "subbing layer unit" as set forth in the statement of this invention.
  • Preferred hydrophobic polymers used as subbing layers are styrene-butadiene copolymers, vinylidene chloride copolymers, water-soluble polyesters and polyacrylic esters. From these hydrophobic polymers styrene-butadiene copolymers and vinylidene chloride copolymers are the most preferred. However it has been established that, according to this invention, styrene-butadiene copolymers are the most preferred in order to find a solution for the problem of getting laser marked zones on the film showing the fewest optical failures.
  • the hydrophilic layer coated adjacent to the subbing layer may be in the form of an aqueous dispersion e.g. a latex, optionally containing a cross-linking agent, a swelling agent, a matting agent or an antistatic agent.
  • a cross-linking agent examples include triazine compounds as described e.g.
  • hydrophilic colloids such as dextran, polyacrylamide, polyvinylalcohol and polyvinyl pyrrolidone may be used, but particularly preferred is gelatin, optionally in combination with at least one of the other hydrophilic colloids cited.
  • hydrophilic layers are gelatinous layers.
  • the gelatin used therein can be lime-treated or acid-treated gelatin. The preparation of such gelatin types has been described in e.g. "The Science and Technology of Gelatin", edited by A.G. Ward and A. Courts, Academic Press 1977, page 295 and next pages.
  • the gelatin can also be an enzyme-treated gelatin as described in Bull. Soc. Sci. Phot.
  • Gelatine derivatives may be useful. Said derivatives have e.g. been described in US-Patents 4,978,607; 5,378,598; 5,395,748 and 5,439,791 and in EP-A's 0 628 860 and 0 666 498.
  • a matting agent present in the "subbing layer unit” use can be made of fine particles of organic compounds such as polymethyl methacrylate homopolymer, copolymer of methyl methacrylate with acrylic acid, starch and/or fine particles of inorganic compounds such as colloidal silica, synthetic clay and titanium dioxide.
  • organic compounds such as polymethyl methacrylate homopolymer, copolymer of methyl methacrylate with acrylic acid, starch and/or fine particles of inorganic compounds such as colloidal silica, synthetic clay and titanium dioxide.
  • an antistatic agent present in the "subbing layer unit” use can be made of metal oxides, as described, e.g., in US-A's 4,394,441 and 5,439,785; of conductive polymers, as described e.g. in US-A's 3,437,484 and 4,898,808; of fluoro-substuted compounds as described e.g. in US-A's 4,407,937 and 4,366,238 or a combination thereof.
  • At least said "subbing layer unit” defined above comprises a chemical compound having reducing properties and a light-stabilising agent, also called light-stabiliser, absorbing ultraviolet radiation. Both types of compounds are mentioned as they compensate for or neutralise both an oxidation reaction which takes place as a pure thermal process at a locally elevated temperature or with the assistance of (laser) light respectively. In a preferred embodiment both types of compounds are coated in the hydrophilic layer of the "subbing layer unit", coated adjacent to the hydrophobic subbing layer which is in direct adhesive contact with the support.
  • the film element according to the present invention thus preferably comprises said light-stabiliser and said chemical compound having reducing properties in the said hydrophilic colloid layer: the other hydrophilic layers may simultaneously contain one or more light-stabiliser(s) (which may e.g. also be present in the blue-sensitive layer) and one or more chemical compound(s) having reducing properties (which is preferably not present in light-sensitive emulsion layers comprising silver halide crystals, as fog and instability may form a problem) or may contain one of more light-stabilizer or one or more chemical compound(s) having reducing properties.
  • the other hydrophilic layers may simultaneously contain one or more light-stabiliser(s) (which may e.g. also be present in the blue-sensitive layer) and one or more chemical compound(s) having reducing properties (which is preferably not present in light-sensitive emulsion layers comprising silver halide crystals, as fog and instability may form a problem) or may contain one of more light-stabilizer or one or more chemical compound(s) having reducing properties
  • Reducing properties of the corresponding chemical compound having reducing properties are derived from the sum of its polarographically determined anodic and cathodic potentials which should be positive.
  • anti-oxidants To retard the thermal oxidation addition of anti-oxidants is the most commonly used method of stabilisation.
  • Especially preventive oxidants also called secondary antioxidants, that are responsible for the destruction of e.g. oxygen radicals, hydroxyl-radicals and peroxy radicals generated rapidly in the presence of a sufficient amount of oxygen at high temperatures, are particularly preferred.
  • antioxidants should not decompose during different thermal attacks of a polymer. Nevertheless at temperatures of up to 300°C and more parts of the oxidants are consumed as a consequence of its protective function. Moreover it is important to match the required amounts of antioxidants thereupon.
  • antioxidants are alkylphenols, hydroxyphenylpropionates, hydroxybenzyl compounds, alkylidene bisphenols, secondary aromatic amines, thiobisphenols, aminophenols, thioethers, phosphites and phosphonites, sterically hindered amines, etc.. Said products are sold under well-known trade names as e.g. AGE RITE and VANOW, both from R.T.
  • a further type of useful compounds which may additionally be added in order to reach the objects of this invention is a so-called "flame retarding" agent.
  • the layer unit adjacent to the thermoplastic support comprises one or more flame retarding agents
  • its action is based on the formation of a "microshield" upon the support in order to separate the combustible materials from oxygen, necessary for the combustion process, which process is accelerated by heat, generated e.g. by laser marking.
  • Typical useful compounds to reach that goal are phosphorous compounds.
  • the range of effectively working products containing phosphor is extremely versatile and extends over several oxidation states: phosphines; phosphine oxides, phosphonium compounds, phosphonates, elemental red phosphor, phosphites and phosphates.
  • Phosphorous compounds containing halogen, particularly bromine have an increased effectiveness as a flame retardant.
  • chlorinated flame retardants are cycloaliphatic chlorinated flame retardants like "dechlorane plus” and “HET-acid” and its anhydride. Aromatic chlorinated compounds are not useful due to their limited flame retardancy.
  • Light-stabilising agents and more particularly those absorbing ultraviolet radiation for linear or thermoplastic polyesters like polyethylene or polybutylene terephthalate, show an absorption spectrum, which going from larger to smaller wavelengths begins at 360 nm, significantly increases below 320 nm and becomes most pronounced below 300 nm.
  • Suitable light-stabilising agents absorbing ultraviolet radiation are selected from the group of organic compounds consisting of 2-hydroxybenzophenones and 2-hydroxophenyl benzotriazoles, sterically hindered amines (nitroxyl radicals as effectively absorbing agent) and organic nickel compounds (like n-butylamine-nickel-2,2'-thio-bis-(4-t-octylphenolate)).
  • benzotriazole type UV absorbers are generally chosen because they inhibit low initial color and good color stability. Recently the effectiveness of sterically hindered amines has been taken in consideration as opening new horizons.
  • HOSTAVIN from HOECHST, Frankfurt, Germany
  • IRGASTAB CHIMASSORB and TINUVIN from Ciba Geigy, Basel, Switzerland
  • UVINIL and SICOSTAB from BASF, Ludwigshafen, Germany
  • UC-CHEK AM from Ferro Corp., Cleveland, USA
  • UV-ABSORBER BAYER from Bayer AG, Leverkusen, Germany
  • SANDUVOR from Sandoz AG, Basel, Switzerland
  • GOODRITE UV from BF Goodrich, Cleveland, USA
  • CYASORB UV from American Cyanamid Co., Wayne, USA
  • EASTMAN INHIBITOR from Eastman Chemical Products Inc., Kingsport, USA
  • RYLEX from Du Pont de Nemours, WILMINGTON, USA
  • SALOL from Dow Chemical Co., Midland, USA; etc., without however being limited thereto.
  • Especially preferred concentrations of light stabilisers are in the range from 0.05 to 2 % by weight with respect to the layer or material to be protected.
  • UV-absorbers known from patent literature are e.g. aryl-substituted benzotriazole compounds as described in US-A 3,533,794, 4-thiazolidone compounds as described in US-A 3,314,794 and 3,352,681, benzophenone compounds as described in JP-A 2784/71 and US-A 3,503,330, cinnamic ester compounds as described in US-A 3,705,805 and 3,707,375, butadiene compounds as described in US-A 4,045,229, butadiene compounds having a pyrrolidine nucleus as has been disclosed in RD No. 18032 (April 1979), p. 139-140; benzoxazole compounds as described in US-P 3,700,455 and polymeric stilbene-triazine compounds as in US-P 3,615,547.
  • At least said subbing layer unit comprises a chemical compound having reducing properties and/or a light-stabilising chemical compound absorbing ultraviolet radiation.
  • gelatin is the most preferred colloid.
  • colour photographic motion picture projection film elements as multilayer colour print film elements intended for making colour release prints are subtitled after colour processing.
  • Said elements basically consist of a transparent polyester film support carrying in the given order a blue-sensitive silver halide emulsion layer, a red-sensitised silver halide emulsion layer, and a green-sensitised silver halide emulsion layer. Between the emulsion layers intermediate layers of a hydrophilic colloid, mostly gelatin, are provided for better colour separation.
  • the side of the transparent film support opposite to that carrying the emulsion layers is coated with a carbon black antihalation back layer.
  • a carbon black antihalation back layer indeed provides excellent halation protection and has excellent antistatic properties.
  • a colour photographic motion picture projection film element comprising a transparent film support and coated thereon in succession, a blue-sensitive silver halide emulsion layer comprising a yellow-forming coupler, an intermediate layer, a red-sensitised silver halide emulsion layer comprising a cyan-forming coupler, an intermediate layer, a green-sensitised silver halide emulsion layer comprising a magenta-forming coupler, and an antistress layer, characterised in that between said support and said blue-sensitive silver halide emulsion layer a yellow antihalation undercoat is provided, which comprises at least one yellow non-diffusing dye that absorbs blue light and is removable and/or decolourisable in a processing bath and that between said blue-sensitive silver halide emulsion layer and said red-sensitised silver
  • Suitable amounts of both the ultraviolet light-absorbing compound and the reducing agent are comprised between 25 and 250 mg/m 2 and more preferably between 50 and 150 mg/m 2 .
  • the said yellow antihalation undercoat contains said at least one reducing agent and at least one light-stabiliser, preferably in amounts as set forth hereinbefore.
  • Dispersions of said reducing agent and of said light-stabiliser in this hydrophilic yellow antihalation layer are preferably prepared in the presence of oil-formers as e.g. tricresyl-phosphate, dibutylphthalate, diethyllaurate, myristol, di-pentylphenol and the like.
  • oil-formers as e.g. tricresyl-phosphate, dibutylphthalate, diethyllaurate, myristol, di-pentylphenol and the like.
  • the type and the amounts of oil-former used in the dispersion and coated therefrom in the "subbing layer unit" preferably in the hydrophilic uppermost layer thereof, are decisive for the adhesion characteristics of "subbing layer unit" and support.
  • bromine-containing agents are much better flame-retardant or flame-resistant agents than chloride-containing agents.
  • the use of silver halide emulsions rich in chloride leads to a much larger extent to a laser marking optical failure than the use of silver bromide or silver bromoiodide emulsions, used preferably in e.g. colour negative films, microfilms, X-ray films and the like.
  • Materials in which silver halide emulsions rich in chloride are used as e.g. colour print films, films for graphic applications and for diffusion transfer are expected to be more sensitive to the phenomenon of flame-sensitivity, which causes problems when laser engraving methods are applied to mark such films before processing.
  • the power of the laser is one of the factors determining the quality of the marks, obtained by laser engraving techniques.
  • Suitable lasers to be used, depending on the application are gas-, dye- or semiconductor lasers emitting light in the wavelength ranges from ultraviolet to infrared as well as a plasma light source. Said light sources are known as suitable light sources for recording but in order to get subtitling action a "green-blue" YAG-laser having a well-defined power and subtitling velocity, as e.g. described in US-A 5,367,348 is preferred.
  • Another laser used in the Examples hereinafter is an Ar-laser, emitting green-blue (488 nm) or, preferably, green (515 nm) light.
  • Other lasers having a typical emission in the longer (red) wavelength region are He-Ne and Kr-lasers.
  • Samples of colour photographic motion picture projection film elements A, B, C ....to K were made. Each sample had a transparent film support, a subbing layer, a blue-sensitive silver halide emulsion layer comprising a yellow-forming coupler, an intermediate gelatin layer, a red-sensitised silver halide emulsion layer comprising a cyan-forming coupler, an intermediate gelatin layer, a green-sensitised silver halide emulsion layer comprising a magenta-forming coupler, and an antistress layer as has also been described in EP-Specification 0 252 550. All samples were identical except for the composition of the combination of reducing agent and light-stabiliser, as summarised in Table 1.
  • Element A had a yellow antihalation undercoat between the support and the blue-sensitive emulsion layer, the yellow antihalation undercoat having a thickness of 1 ⁇ m and comprising 290 mg of a yellow dye and 0.6 g of gelatin per m2.
  • Elements B, C .. to K had an identical yellow antihalation undercoat as in Element A and in addition thereto the corresponding ultraviolet (UV) absorber compound in an amount of 100 mg per m 2 and as a reducing agent in an amount of 100 mg per m 2 , both UV-absorber and reducing agent as summarised in Table 1.
  • UV absorber compound in an amount of 100 mg per m 2
  • reducing agent in an amount of 100 mg per m 2
  • the print film was subtitled by means of a laser having a power of 6 W, 5 W and 4 W.

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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)

Claims (9)

  1. Elément en forme de film, dans lequel ledit élément est un élément en forme de film de projection cinématographique en couleurs comprenant un support de film thermoplastique transparent possédant une unité de couche adhésive et, coulées sur cette dernière dans l'ordre indiqué, une couche d'émulsion à l'halogénure d'argent sensible au bleu comprenant un copulant formateur de jaune, une couche intermédiaire, une couche d'émulsion à halogénure d'argent sensibilisée au rouge comprenant un copulant formateur de bleu-vert, une couche intermédiaire, une couche d'émulsion à l'halogénure d'argent sensibilisée au vert comprenant un copulant formateur de magenta, et une couche de protection, caractérisé en ce qu'au moins une desdites unités de couches adhésives comprend au moins un stabilisateur contre l'effet de la lumière et au moins un composé chimique possédant des propriétés de réduction, dans lequel ledit composé chimique possédant des propriétés de réduction est caractérisé par la propriété que la somme de ses potentiels anodique et cathodique déterminée par voie polarographique est positive, et dans lequel ledit stabilisateur contre l'effet de la lumière est un composé absorbant le rayonnement ultraviolet.
  2. Elément en forme de film selon la revendication 1, dans lequel, entre la couche d'émulsion à l'halogénure d'argent sensible au bleu et le support transparent, est présente une sous-couche antihalo de couleur jaune qui comprend au moins un colorant jaune non diffusible qui absorbe la lumière bleue et qui peut être éliminée et/ou décolorée dans un bain de traitement.
  3. Elément en forme de film selon la revendication 1 ou 2, dans lequel, entre ladite couche d'émulsion à l'halogénure d'argent sensible au bleu et ladite couche d'émulsion à l'halogénure d'argent sensibilisée au rouge, on prévoit une couche intermédiaire antihalo de couleur bleue qui comprend au moins un colorant bleu non diffusible qui absorbe la lumière rouge et qui peut être éliminée et/ou décolorée dans un bain de traitement.
  4. Elément en forme de film selon l'une quelconque des revendications 1 à 3, dans lequel ledit support de film thermoplastique transparent possède un support de polyéthylène téréphtalate.
  5. Elément en forme de film selon l'une quelconque des revendications 1 à 4, dans lequel ledit composé chimique est un antioxydant choisi parmi le groupe de composés constitué par un composé de phosphite, un composé d'aminophénol, un composé d'alkylphénol, un composé de diester de t-butylphénol et un composé d'hydroquinone substitué par un groupe d'ester 2,5-dialkylique.
  6. Elément en forme de film selon l'une quelconque des revendications 1 à 5, dans lequel ledit agent stabilisateur contre l'effet de la lumière absorbant le rayonnement ultraviolet est choisi parmi le groupe des agents constitué par des composés de benzotriazole substitués par un groupe aryle, des composés de 4-thiazolidone, des composés de benzophénone, des composés d'ester cinnamique, des composés de butadiène, des composés de benzoxazole et des composés polymères de stilbène - triazine.
  7. Elément en forme de film selon l'une quelconque des revendications 1 à 5, dans lequel ledit agent stabilisateur contre l'effet de la lumière absorbant le rayonnement ultraviolet est choisi parmi le groupe de composés de benzophénone constitué par la 2-hydroxy-4-méthoxybenzophénone et la 2,4-dihydroxybenzophénone.
  8. Elément en forme de film selon l'une quelconque des revendications 1 à 7, dans lequel ladite unité de couche adhésive est composée essentiellement d'au moins une couche polymère hydrophobe mise directement en contact avec le support de film transparent et une couche colloïdale hydrophile coulée sur la première citée.
  9. Elément en forme de film selon la revendication 8, dans lequel ladite couche hydrophobe possède une composition choisie parmi le groupe constitué par le chlorure de vinylidène et par des copolymères de styrène/butadiène.
EP19960120156 1995-12-27 1996-12-16 Filmphotographique en couleur à l'halogénure d'argent ayant un support en plastique capable d'être marqué par un laser Expired - Lifetime EP0782045B1 (fr)

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EP19960120156 EP0782045B1 (fr) 1995-12-27 1996-12-16 Filmphotographique en couleur à l'halogénure d'argent ayant un support en plastique capable d'être marqué par un laser

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EP95203633 1995-12-27
EP95203633 1995-12-27
EP19960120156 EP0782045B1 (fr) 1995-12-27 1996-12-16 Filmphotographique en couleur à l'halogénure d'argent ayant un support en plastique capable d'être marqué par un laser

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EP0782045A1 EP0782045A1 (fr) 1997-07-02
EP0782045B1 true EP0782045B1 (fr) 2001-10-24

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