EP0772081B1 - Colorants corrigeant la densité pour films négatifs couleur comprenant des couches d'enregistrement magnétiques - Google Patents

Colorants corrigeant la densité pour films négatifs couleur comprenant des couches d'enregistrement magnétiques Download PDF

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Publication number
EP0772081B1
EP0772081B1 EP19960420318 EP96420318A EP0772081B1 EP 0772081 B1 EP0772081 B1 EP 0772081B1 EP 19960420318 EP19960420318 EP 19960420318 EP 96420318 A EP96420318 A EP 96420318A EP 0772081 B1 EP0772081 B1 EP 0772081B1
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Prior art keywords
group
density correction
hydrogen
color negative
alkyl group
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German (de)
English (en)
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EP0772081A2 (fr
EP0772081A3 (fr
Inventor
Paul Barrett Merkel
Melvin Michael Kestner
David Hoke
Jeffrey Walter Schmoeger
Paul Leo Zengerle
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Eastman Kodak Co
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Eastman Kodak Co
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Priority claimed from US08/574,510 external-priority patent/US5725999A/en
Priority claimed from US08/583,394 external-priority patent/US5800971A/en
Priority claimed from US08/584,762 external-priority patent/US5811228A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of EP0772081A2 publication Critical patent/EP0772081A2/fr
Publication of EP0772081A3 publication Critical patent/EP0772081A3/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
    • 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
    • G03C7/392—Additives
    • G03C7/39208—Organic compounds
    • G03C7/39212—Carbocyclic
    • G03C7/39216—Carbocyclic with OH groups
    • 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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/02—Marking or applying text

Definitions

  • This invention relates to color negative photographic materials or elements comprising yellow density correction dyes and transparent magnetic recording layers.
  • Modern color negative films usually contain dyes coated in one or more layers for a variety of purposes.
  • dyes may be used for filtration of specific wavelengths of exposing light (either as intergrain absorbers or in separate layers containing no silver halide), for antihalation and to adjust the background density (Dmin) of color negative films for printing purposes.
  • Dmin background density
  • Dyes that are used to adjust Dmin of color negative films to produce prints of proper color balance may be referred to as density correction dyes.
  • density correction dyes may also be used for filtration and/or antihalation purposes.
  • a recent advance in the structure of color negative films comprises use of magnetic recording layers to encode useful information for printing and other purposes.
  • the magnetic recording layers can contain magnetic particles of a variety of types, sizes and shapes, but are generally designed to be transparent to visible light. Additional descriptions of such magnetic layers may be found, for example, in Research Disclosure, November 1992, Item 34390, p 869 and in U.S. Patent 5,395,743 of Brick et al.
  • the magnetic recording layers are essentially transparent, the magnetic particles and/or the polymeric supports used for color negative films with magnetic recording layers can lead to higher absorption in the far blue region of the visible spectrum (ca 400-440 nm) than is typical for conventional color negative films.
  • the differences in the far blue absorption of conventional films and films containing magnetic recording layers can lead to differences in print color balance when these films are printed together on certain printers.
  • a printer such as the AGFA MSP printer may see different blue densities for a conventional color negative film and a film with a magnetic recording layer, even if the films have the same blue densities in the region of color paper sensitivity, it may expose such films differently leading to unacceptable differences in color balance.
  • One approach for avoiding color balance problems and maintaining printer compatibility for films containing magnetic recording layers is to incorporate one or more density correction dyes that spectrally compensate for the differences in the far blue absorption of the magnetic film and conventional color negative films. Since films containing magnetic recording layers generally have greater far blue absorption than conventional films, this compensation is most suitably achieved by replacing conventional yellow or orange density correction dyes with one or more yellow dyes having reduced absorption in the region of approximately 400-440 nm.
  • yellow density correction dyes such as C1 below, that absorb strongly in the region of 480 nm
  • the yellow density correction dyes utilized in color negative films with magnetic recording layers be inexpensive, readily dispersible and stable toward heat, moisture and photographic processing chemicals.
  • a problem to be solved is to provide a color negative photographic element containing a magnetic layer, which is capable of being processed at the same time as conventional films which do not contain a magnetic layer, without introducing a yellow coloration into the prints produced form the magnetic layer containing film.
  • the invention provides a multilayer color negative photographic element comprising a support, at least one light-sensitive silver halide emulsion layer sensitive to each of the blue, green and red regions of the visible spectrum, a magnetic recording layer, and a permanent density correction dye, wherein:
  • the element exhibits improved color balance permitting it to be satisfactorily processed together with conventional photographic elements to produce viewable color images which do not have undesired yellow coloration in some printers.
  • This invention relates to color negative photographic materials or elements comprising one or more yellow or orange-yellow density correction dyes having the spectral properties described in the SUMMARY OF THE INVENTION and one or more magnetic recording layer(s).
  • the density correction dyes of the invention may also function as filter dyes and/or antihalation dyes and may be coated in various layers including a filtration layer between blue and green sensitive layers and in an antihalation layer under (further from the exposing light) the light sensitive silver halide layers.
  • the invention provides color negative films with magnetic recording layers that provide viewable media such as prints having the proper color balance when printed together with conventional (nonmagnetic) color negative films. This means that separate settings or separate processing for the film having the magnetic layer is not required in order to obtain satisfactory prints.
  • the invention also provides thinner color negative films with reduced chemical laydown through the use of high extinction density correction dyes of the proper hue. Further, the density correction dyes of the invention may also serve as filter dyes or antihalation dyes. Moreover, the density correction dyes are easily and inexpensively manufactured and readily dispersible.
  • the log P of the dye (calculated by the program Medchem, version 3.54, as described in "Exploring QSAR", C. Hansch and A. Leo, American Chemical Society, Washington, D.C. 1995) should be at least 4.0 and preferably 5.0 or greater.
  • the absorbance maximum is between 455 and 480 nm
  • the ratio of absorbance at 480 nm relative to 420 nm is between 1.3 and 3.0
  • the ratio of absorbance at 440 nm relative to 420 nm is between 1.35 and 2.2
  • the ratio of absorbance at 510 nm relative to 480 nm is less than or equal to 0.55.
  • Useful coated levels of the density correction dyes of this invention depend upon molecular weight and extinction coefficient, but typically range from 0.005 to 0.16 g/sq m , with levels of 0.011 to 0.11 g/sq m being more typical.
  • the density correction dyes of this invention may, for example, be incorporated in the photographic materials by first dispersing a dye- containing oil phase in an aqueous phase containing a binder, such as gelatin, and one or more surfactants.
  • the dye-containing dispersion is then coated in the appropriate layer of a multilayer film on a suitable support.
  • the oil phase usually consists of the dye dissolved in one or more high-boiling solvents. This is typically added to an aqueous solution of gelatin and surfactant, which is followed by milling or homogenization of the mixture to disperse the oil phase in the aqueous phase as small particles.
  • Auxiliary solvents such as ethyl acetate or cyclohexanone may also be used in the preparation of such dispersions to facilitate dissolution of the dye in the oil phase.
  • ethyl acetate or cyclohexanone may also be used in the preparation of such dispersions to facilitate dissolution of the dye in the oil phase.
  • some yellow dyes of this invention do not require the use of a removable auxiliary solvent for dispersion preparation.
  • the yellow dyes of this invention may also be dispersed as solid particle dispersions via ball milling.
  • Hues of the density correction dyes of this invention can be shifted to optimize the spectral properties by choice of high-boiling solvent.
  • High-boiling solvents useful for the practice of this invention include aryl phosphates (e.g. tricresyl phosphate), alkyl phosphates (e.g. trioctyl phosphate), mixed aryl alkyl phosphates (e.g. diphenyl 2-ethylhexyl phosphate), aryl, alkyl or mixed aryl-alkyl phosphonates, phosphine oxides (e.g. trioctylphosphine oxide), esters of aromatic acids (e.g.
  • dibutyl phthalate dibutyl phthalate
  • esters of aliphatic acids e.g. dibutyl sebacate
  • alcohols e.g. 2-hexyl-1-decanol
  • phenols e.g. p-dodecylphenol
  • carbonamides e.g. N,N-dibutyldodecanamide or N-butylacetanalide
  • sulfoxides e.g. bis(2-ethylhexyl)sulfoxide
  • sulfonamides e.g. N,N-dibutyl-p-toluenesulfonamide
  • hydrocarbons e.g. dodecylbenzene
  • Useful dye:high-boiling solvent weight ratios range from about 1:0.1 to 1:10, with 1:0.2 to 1:5.0 being typical.
  • the yellow dyes of this invention may also be dispersed without the use of a permanent high-boiling solvent.
  • the color negative films of this invention can comprise one or more transparent magnetic recording layers, comprising ferromagnetic particles having a size of at least 20 sq m/g and coated at a level of from 1x104 to 2x105 g/m3.
  • the ferromagnetic particles comprise iron oxides such as gamma-Fe2O3, Fe3O4, or iron oxides such as gamma-Fe2O3 or Fe3O4 surface treated with Co, Zn, Ni or other metals.
  • the ferromagnetic particles of this invention also comprise chromium dioxides, such as CrO2 or CrO2 with metallic elements such as Li, Na, Sn, Pb, Fe, Co, Ni or Zn in solid solution.
  • the ferromagnetic particles of this invention may also comprise barium ferrites. Ferromagnetic metal particles with a surface oxide coating to improve stability may also be used in accordance with this invention. In addition magnetic oxides with a thicker layer of lower refractive oxide or other material having a lower optical scattering cross-section, as taught in U.S. 5,217,804 and 5,252,444, may also be used. Cobalt surface-treated gamma iron oxide is a very suitable ferromagnetic recording material for use in accordance with this invention.
  • useful coated magnetic particle concentrations are between about 0.01 and 0.25 g/sq m, with a range of 0.02 to 0.08 g/sq m being typical for the color negative films of this invention.
  • the magnetic layer(s) of this invention may also contain abrasive particles comprising nonmagnetic inorganic powders with a Mohs scale hardness of at least 6.
  • abrasive particles comprising nonmagnetic inorganic powders with a Mohs scale hardness of at least 6.
  • specific examples include, aluminum oxides (such as alpha alumina), tin oxides, Cr2O3, alpha-Fe2O3, silicon dioxide, titanium dioxide and silicon carbide.
  • Alpha alumina, tin oxides and mixtures thereof are the preferred abrasives.
  • the tin oxides may be undoped or doped and in the nonconductive or conductive forms.
  • binders may be used in the magnetic recording layers of this invention, including polyurethane resins and cellulose derivatives.
  • Cellulose esters such as cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate propionate and cellulose acetate butyrate are particularly preferred binders.
  • Mixtures of cellulose diacetate and cellulose triacetate serve as particularly useful binders in the magnetic recording layers of this invention.
  • the photographic materials of this invention can be provided with a protective or lubricating layer comprising materials such as silicone oil or carnauba wax over the magnetic recording layer.
  • Any suitable photographic film support may be employed in the practice of this invention, such as cellulose derivatives (including cellulose diacetate, cellulose triacetate, cellulose acetate propionate and cellulose acetate butyrate), polyamides, polycarbonates, polyesters (such as polyethylene terephthalate and polyethylene naphthalate), polystyrene, polyethylene and polypropylene.
  • Suitable exemplary supports for the practice of this invention are polyethylene naphthalate, polyethylene terephthalate and cellulose triacetate.
  • the yellow density correction dyes of this invention may be coated in the color negative photographic materials of this invention either alone in one or more layers or together with other dyes or addenda in the same layers or layer.
  • the yellow dyes of this invention can be coated in any layer on either side of the support.
  • the yellow density correction dyes are coated in an antihalation layer under (i.e. furthest from the direction of exposure) the light-sensitive silver halide layers.
  • the antihalation layer is often adjacent to a transparent support.
  • the yellow dyes of this invention may also be coated between the green-sensitive and red-sensitive layers of the color negative films of this invention.
  • the yellow dyes of this invention are coated in a filtration layer under the blue-sensitive layer(s) and over the green sensitive layer(s) of the color negative film. This reduces unwanted blue exposure of the green-sensitive layers and can allow elimination of some or all of normally used filtration materials, such as bleachable yellow dyes or Carey-Lea silver thus enabling layer thinning.
  • the yellow dyes of this invention may also be coated above the blue sensitive layer(s) of the color negative films for adjustment of blue speed.
  • the yellow dyes of this invention may also be coated in an emulsion-containing layer such as the least-sensitive magenta dye forming layer.
  • One useful embodiment of this invention comprises yellow or orange-yellow arylidine methine-type density correction dyes of structure I, or II below wherein:
  • the density correction dye is of structure II, R6, R7 and R9 are alkyl groups and R8 is an alkoxy group.
  • the alkyl groups of R1-R10 may be straight chain, branched or cyclic and may be unsubstituted or substituted with any group that does not adversely affect the performance of the invention.
  • the aryl groups of R2 or R7, the alkoxy groups of R3, R4, R8 or R9, and the aryloxy groups of R3 or R8 may also be unsubstituted or substituted with any group that does not adversely affect the performance of the invention.
  • An alkoxy group of R3 may form a ring with the alkyl group of R2 or the alkoxy group of R8 may form a ring with the alkyl group of R7.
  • yellow methine density correction dyes of this invention include, but are not limited to, the following (D1-D26):
  • a multilayer color negative photographic element comprising a support, at least one light-sensitive silver halide layer sensitive to each of the blue, green and red regions of the visible spectrum, a magnetic recording layer and a yellow or orange-yellow methine density correction dye of structure III, wherein:
  • R 1 is hydrogen.
  • R 2 is an alkyl group.
  • n is 0, 1 or 2.
  • R 4 is hydrogen.
  • X is oxygen.
  • R 5 is an alkyl group.
  • R 3 is an alkoxy group.
  • R 6 is hydrogen.
  • R 1 is hydrogen
  • R 2 is alkyl
  • R 3 is hydrogen or alkyl
  • R 4 is hydrogen
  • R 5 is alkyl
  • R 6 is hydrogen
  • X is oxygen
  • n is 0 or 1
  • R 7 is an alkyl group, a sulfonamido group or a halogen atom, such as chlorine, in the para position relative to the oxygen of the benzofuran ring.
  • R 1 and R 2 are alkyl groups
  • R 3 , R 4 and R 6 are hydrogen
  • R 5 is an alkyl group
  • n is 0 or 1
  • R 7 is an alky group, a sulfonamido group or a halogen in the para position relative to X, which is oxygen.
  • the alkyl substituents comprising R 1 through R 7 may be unbranched, branched or cyclic and may be unsubstituted or substituted.
  • the alkoxy groups comprising R 3 or R 7 may be unbranched or branched and may be substituted or unsubstituted.
  • the aryl groups comprising R 2 or R 7 and the aryloxy groups comprising R 3 or R 7 may be unsubstituted or substituted.
  • the carbonamido, sulfonamido, carbamoyl, acyloxy, alkoxycarbonyl and aryloxycarbonyl, acyl, sulfamoyl, sulfonyl, sulfoxyl, alkylthio and arylthio groups comprising R 7 may also be further substituted. Any substituent may be chosen for the alkyl, aryl, alkoxy, aryloxy and R 7 groups that does not adversely affect the performance of the yellow methine density correction dyes of this invention.
  • Suitable substituents include halogen atoms, such as chlorine, alkenyl groups, alkynyl groups, aryl groups, hydroxy groups, alkoxy groups, aryloxy groups, acyl groups, acyloxy groups, alkoxycarbonyl groups, aryloxycarbonyl groups, carbonamido groups (including alkyl-, aryl-, alkoxy-, aryloxy- and alkylamino-carbonamido groups), carbamoyl groups, carbamoyloxy groups, sulfonamido groups, sulfamoyl groups, alkylthio groups, arylthio groups, sulfoxide groups, sulfonyl groups, sulfonyloxy groups, alkoxysulfonyl groups, aryloxysulfonyl groups, trifluoromethyl groups, cyano groups, imido groups and heterocyclic groups, such as 2-furyl, 3-furyl, 2-thieny
  • nondiffusible yellow methine density correction dyes of this preferred embodiment A include, but are not limited to, the following (DA1-DA35):
  • This embodiment provides a multilayer color negative photographic element as in Embodiment A, at least one light-sensitive silver halide emulsion layer sensitive to each of the blue, green and red regions of the visible spectrum, one or more yellow or orange-yellow cyano benzoxazolyl or cyano benzothiazolyl arylidene type methine filter or density correction dyes of structure III, codispersed with one or more hydroquinone, catechol or sulfonamidophenol reducing agents.
  • hydroquinone, catechol and sulfonamidophenol reducing agents that are codispersed in the same oil phase with the yellow methine dyes of structure III are preferably of structures IV, V and VI, respectively, wherein:
  • the reducing agent is of structure IV, m is 2 and the R 8 groups are alkyl groups in the 2- and 5-positions of the benzene ring.
  • the color negative elements of this invention may be color print films used for making color prints on color photographic paper or they may be motion picture color negative films.
  • the alkyl substituents comprising R 8 through R 11 may unbranched, branched or cyclic and may be unsubstituted or substituted.
  • the alkoxy groups comprising R 8 or R 9 may be branched or unbranched and substituted or unsubstituted.
  • the aryl groups comprising R 10 and R 11 and the aryloxy groups comprising R 8 and R 9 may be unsubstituted or substituted.
  • the carbonamido and carbamoyl groups comprising R 8 and R 9 may also be unsubstituted or substituted.
  • the carbonamido, sulfonamido, carbamoyl, acyloxy, acyl, alkoxycarbonyl, aryloxycarbonyl, sulfamoyl, sulfonyl, sulfoxyl, sulfonyloxy, alkylthio and arylthio groups comprising R 7 may also be further substituted. Any substituent may be chosen for the alkyl, aryl, alkoxy, aryloxy, R 7 R 8 and R 9 groups that does not adversely affect the performance of the yellow methine dye formulations of this invention.
  • Suitable substituents include halogen atoms, such as chlorine, alkenyl groups, alkynyl groups, aryl groups, hydroxy groups, alkoxy groups, aryloxy groups, acyl groups, acyloxy groups, alkoxycarbonyl groups, aryloxycarbonyl groups, carbonamido groups (including alkyl-, aryl-, alkoxy-, aryloxy- and alkylamino-carbonamido groups), carbamoyl groups, carbamoyloxy groups, sulfonamido groups, sulfamoyl groups, alkylthio groups, arylthio groups, sulfoxyl groups, sulfonyl groups, sulfonyloxy groups, alkoxysulfonyl groups, aryloxysulfonyl groups, trifluoromethyl groups, cyano groups, imido groups and heterocyclic groups, such as 2-furyl, 3-furyl, 2-thien
  • nondiffusible reducing agents (IV, V and VI) of this invention include, but are not limited to, the following (R1-R12) :
  • the invention has further advantages in that it provides color negatives that after long term storage continue to provide prints of the proper color balance due to use of methine dye formulations having improved thermal stability.
  • the invention provides color negative films in which some or all the conventional yellow dye(s) or Carey-Lea silver used for filtration of blue light is replaced by one or more permanent yellow filter dyes. Additionally, it provides color negative films comprising yellow methine dyes that are used both for filtration of blue light during exposure and for density correction to provide proper color balance in printing. The provided yellow methine dyes may be used both for density correction and antihalation.
  • Thinner color negative films are made possible by using a single yellow dye for both filtration of blue light and density correction and reduced chemical laydown can be achieved by the use of high covering power density correction dyes of the proper hue.
  • substituent groups which may be substituted on molecules herein include any groups, whether substituted or unsubstituted, which do not destroy properties necessary for photographic utility.
  • group When the term "group" is applied to the identification of a substituent containing a substitutable hydrogen, it is intended to encompass not only the substituent's unsubstituted form, but also its form further substituted with any group or groups as herein mentioned.
  • the group may be halogen or may be bonded to the remainder of the molecule by an atom of carbon, silicon, oxygen, nitrogen, phosphorous, or sulfur.
  • the substituent may be, for example, halogen, such as chlorine, bromine or fluorine; nitro; hydroxyl; cyano; carboxyl; or groups which may be further substituted, such as alkyl, including straight or branched chain alkyl, such as methyl, trifluoromethyl, ethyl, t -butyl, 3-(2,4-di-t-pentylphenoxy) propyl, and tetradecyl; alkenyl, such as ethylene, 2-butene; alkoxy, such as methoxy, ethoxy, propoxy, butoxy, 2-methoxyethoxy, sec -butoxy, hexyloxy, 2-ethylhexyloxy, tetradecyloxy, 2- (2, 4-di- t -pentylphenoxy) ethoxy, and 2-dodecyloxyethoxy; aryl such as phenyl, 4-t-butylphenyl, 2,
  • substituents may themselves be further substituted one or more times with the described substituent groups.
  • the particular substituents used may be selected by those skilled in the art to attain the desired photographic properties for a specific application and can include, for example, hydrophobic groups, solubilizing groups, blocking groups, releasing or releasable groups, etc.
  • the above groups and substituents thereof may include those having up to 48 carbon atoms, typically 1 to 36 carbon atoms and usually less than 24 carbon atoms, but greater numbers are possible depending on the particular substituents selected.
  • the photographic element can be used in conjunction with an applied magnetic layer as described in Research Disclosure, November 1992, Item 34390 published by Kenneth Mason Publications, Ltd., Dudley Annex, 12a North Street, Emsworth, Hampshire P010 7DQ, ENGLAND, and as described in Hatsumi Kyoukai Koukai Gihou No. 94-6023, published March 15, 1994, available from the Japanese Patent Office, the contents of which are incorporated herein by reference.
  • inventive materials in a small format film, Research Disclosure, June 1994, Item 36230, provides suitable embodiments.
  • the silver halide emulsion containing elements employed in this invention can be either negative-working or positive-working as indicated by the type of processing instructions (i.e. color negative, reversal, or direct positive processing) provided with the element.
  • Suitable emulsions and their preparation as well as methods of chemical and spectral sensitization are described in Sections I through V.
  • Various additives such as UV dyes, brighteners, antifoggants, stabilizers, light absorbing and scattering materials, and physical property modifying addenda such as hardeners, coating aids, plasticizers, lubricants and matting agents are described, for example, in Sections II and VI through VIII. Color materials are described in Sections X through XIII.
  • Scan facilitating is described in Section XIV.
  • Supports, exposure, development systems, and processing methods and agents are described in Sections XV to XX.
  • Desirable photographic elements and processing steps including other components suitable for use in photographic elements of the invention are also described in Research Disclosure, Item 37038, February 1995.
  • the processing step described above provides a negative image.
  • the described elements can be processed in the known Kodak C-41 color process as described in The British Journal of Photography Annual of 1988, pages 191-198. Where applicable, the element may be processed in accordance with color print processes such as the RA-4 process of Eastman Kodak Company as described in the British Journal of Photography Annual of 1988, Pp 198-199.
  • Such negative working emulsions are typically sold with instructions to process using a color negative method such as the mentioned C-41 or RA-4 process.
  • the color development step can be preceded by development with a non-chromogenic developing agent to develop exposed silver halide, but not form dye, and followed by uniformly fogging the element to render unexposed silver halide developable.
  • a non-chromogenic developing agent to develop exposed silver halide, but not form dye
  • uniformly fogging the element to render unexposed silver halide developable Such reversal emulsions are typically sold with instructions to process using a color reversal process such as E-6.
  • a direct positive emulsion can be employed to obtain a positive image.
  • Preferred color developing agents are p-phenylenediamines such as:
  • Development is usually followed by the conventional steps of bleaching, fixing, or bleach-fixing, to remove silver or silver halide, washing, and drying.
  • Dmin spectra were obtained for C-41 processed color negative films coated on a conventional cellulose acetate support and on a polyethylene naphthalate support with a layer of magnetic particles.
  • Dmin refers to the density areas of processed film samples that received no light exposure.
  • Dmin densities at 420 nm, 440 nm and 480 nm are compared in Table I for a conventional 200 speed film and a similar film (referred to as Magnetic Film) on polyethylene naphthalate containing magnetic particles.
  • the density differences between the two films are also listed in Table I. It is evident that, while the Dmin densities for the two films are well matched at 480 nm and reasonably well matched at 440 nm, the Magnetic Film has much more density at 420 nm.
  • the Magnetic Film in this example contains 0.135 g/sq m of the density correction dye C2, having the structure shown below. As shown by the spectral data below, C2 has high absorption at 420 nm relative to the density correction dyes of this invention. Replacing C2 in films such as the Magnetic Film with the dyes of this invention can reduce D min densities at 420 nm relative to 480 nm. This will render the density differences between films with magnetic recording layers and conventional film more similar at 420 and 480 nm. The net result is that prints made from the films with magnetic recording layers will have color balance more similar to prints made from conventional color negatives, even using printers with high sensitivity in the region of 420 nm.
  • An oil phase consisting of 8.0 g of D1, 16.0 g of S-1 and 24.0 g of ethyl acetate was added to an aqueous phase consisting of 24.0 g of gelatin 2.4 g of a surfactant (sodium triisopropylnaphthalene sulfonate) in 350 ml of water.
  • the oil phase was dispersed in the aqueous phase in the form of small particles by passing the mixture through a colloid mill in a manner known in the art.
  • the ethyl acetate auxiliary solvent was removed by evaporation resulting in a dispersion that contained 2.0% by weight of dye D1.
  • a sample of the dispersion of D1 was coated on a transparent cellulose acetate support together with additional gelatin, a spreading agent and formaldehyde hardener at a D1 laydown of about 0.11 g/sq m to provide a transmission optical density at the absorption maximum of about 0.7.
  • Dispersions of the other density correction dyes were prepared similarly, and these dyes were similarly coated at levels sufficient to provide optical densities of approximately 0.7.
  • Table II provides spectral data for the coating of comparative dye C2 with S-1 as well as for dyes D1, D2, D3 and D26 of this invention coated with S-1. Absorption maxima in nm are listed in Table II as well as density ratios at 480:420nm, 440:420 nm and 510:480 nm. It is evident from the data in Table II that the dyes of this invention have higher 480 : 420nm density ratios than dye C2.
  • density correction dyes used with color negative films comprising magnetic recording layers have somewhat higher 440 : 420nm density ratios than previously used dyes such as C2, since there is typically only a small density mismatch in the region of 440 nm between conventional color negative Dmin values and Dmin values obtained for color negative films comprising magnetic recording layers (see Table I).
  • the density correction dyes of this invention have larger 440 :420nm density ratios, as is evident from the data in Table II.
  • yellow density correction dyes not have strong absorption at wavelengths longer than about 510 nm, particularly if they are coated above the green and red sensitive layers to filter unwanted blue light.
  • the low 510 : 480nm density ratios for preferred density correction dyes of this invention permit their use for filtration of blue light in some instances.
  • An additional advantage of the density correction dyes of this invention is their relatively high covering power, which allows relatively low levels to be coated. This can reduce film cost and provide thinner films.
  • the covering power of comparative dye C2 in the coating composition of this example is only about 2.8 sq m/g, whereas the covering power values of dyes D1, D2, D3 and D26 of this invention are about 6.4, 9.6, 8.3 and 6.3 sq m/g, respectively, as coated in this example. This means that less than half as much D1, D2, D3 or D26 need be coated to achieve the same density as C2.
  • the multilayer film structure utilized for this example is shown schematically in Table III. Structures of components not provided previously are given immediately following Table III. Component laydowns are provided in units of g/sq m unless otherwise indicated. Gelatin was used as a binder in the various layers of the multilayer film. Film A contains comparative density correction dye C2 coated at 0.086 g/sq m in the antihalation layer. Film B contains density correction dye D1 of this invention coated at 0.034 g/sq m in the antihalation layer. These films as well as the commercially available 200 speed color negative Film were given neutral exposures and processed using KODAK FLEXICOLOR C-41 processing chemistry.
  • the applied magnetic recording layer comprised a transparent polymeric binder, ferro-magnetic particles and abrasive particles, the magnetic particles having a surface area greater than 30 m2/gm and a coverage of from about 1x10-11 mg/ ⁇ m2 to about 1x10-11 mg/ ⁇ m2.
  • the abrasive particles had a median diameter of from about 0.2 to about 0.4 ⁇ m, specific surface area greater than 5 m2/gm, a Mohs hardness of at least 6 and were present in the transparent magnetic layer in an amount of 30% and upwards by weight based on the weight of the magnetic particles present.
  • the neutral steps of various density were then printed onto a color paper using an AGFA MSP automatic printer that was adjusted to provide optimum color balance for prints made from the 200 speed negatives.
  • the red, green and blue Status A densities of the prints were measured and the densities of the prints made from films A and B of Table III were compared to those of the check prints made from the 200 speed negatives.
  • the Status A density differences are given in Tables IV and V for negatives that were normally exposed and overexposed by three stops, respectively.
  • the density deviations are much lower for prints made from film B of this invention, which results in prints that are much less yellow than prints made from comparative film A and very similar in color balance to the prints made from the 200 speed check negatives.
  • D min spectra were obtained for C-41 processed color negative films coated on a conventional cellulose acetate support and on a polyethylene naphthalate support with a layer of magnetic particles.
  • D min refers to the density areas of processed film samples that received no light exposure.
  • D min densities at 420 nm, 440 nm and 480 nm are compared in Table VI for a conventional 200 speed film and a similar film (referred to as Magnetic Film) on polyethylene naphthalate containing magnetic particles. The density differences between the two films are also listed in Table VI. It is evident that, while the Dmin densities for the two films are well matched at 480 nm and reasonably well matched at 440 nm, the Magnetic Film has much more density at 420 nm.
  • the Magnetic Film in this example contains 0.135 g/sq m of the density correction dye C2 as in Example I.
  • Table VII provides spectral data for the coating of comparative dye C2 with S-1 as well as for dyes DA1, DA2, DA23, DA25 and DA26 of this invention coated with S-1. Absorption maxima in nm are listed in Table VII as well as density ratios at 480:420 nm, 440:420 nm and 510:480 nm. It is evident from the data in Table VII that the dyes of this invention have higher 480:420 nm density ratios than dye C2.
  • yellow methine density correction dyes of this invention Another advantage of the yellow methine density correction dyes of this invention is their excellent stability on storage. For example, dye D1 (coated with S-1 at 1:2) undergoes less than 2% density loss after storage for one week at 70C/50% RH, whereas dye C1 noted earlier looses 50% of its original density (coated with S-1 at 1:2) after storage for one week at 70C/50% RH.
  • the yellow methine density correction dyes of this invention also show improved stability over dye C2 and analogs when coated in the same layer as reducing agents such as 2,5-di-t-octyl hydroquinoine.
  • Film A contains comparative density correction dye C2 at 0.140 g/sq m, of which 0.097 g/sq m is coated in the yellow filter layer between the blue and green sensitive layers and 0.043 g/sq m is coated in the antihalation layer just above the support.
  • Film B contains 0.097 g/sq m of C1 in the yellow filter layer plus 0.011 g/sq m of C2 and 0.027 g/sq m of C1 in the antihalation layer.
  • Film C of this invention contains 0.039 g/sq m of density correction dye DA1 of this invention in the yellow filter layer and no yellow density correction dye in the antihalation layer.
  • the neutral steps of various density were then printed onto color paper using an AGFA MSP automatic printer that was adjusted to provide optimum color balance for prints made from the 200 speed negatives.
  • the red, green and blue Status A densities of the prints were measured and the densities of the prints made from films A, B and C of Table III were compared to those of the check prints made from the 200 speed negatives.
  • the Status A density differences are given in Tables IX and X for negatives that were normally exposed and overexposed by three stops, respectively.
  • the density deviations are much lower for prints made from film C of this invention.
  • the reduction on the blue density differences for film C are particularly significant and result in prints that are much less yellow than prints made from films B or C, and very similar in color balance to the prints made from the 200 speed check negatives.
  • Another set of multilayer films was prepared that included a comparative film and films containing density correction dyes DA1 or DA23 of this invention.
  • the multilayer films were coated on the same support and with the same magnetic recording layer as the films of Example 4.
  • the coating structure of these films is similar to that of Example 4, except that the yellow filter layer (5) is as shown in Table XI, below, and the antihalation layer (14) varies as also shown in Table XI.
  • Comparative film D contains 0.151 g/sq m of density correction dye C2 in the antihalation layer
  • film E of this invention contains 0.038 g/sq m of dye DA1 in the antihalation layer
  • film F of this invention contains 0.037 g/sq m of density correction dye DA23 in the antihalation layer.
  • the neutral steps of various density were then printed onto color paper using an AGFA MSP automatic printer that was adjusted to provide optimum color balance for prints made from the 200 speed negatives.
  • the red, green and blue Status A densities of the prints were measured and the densities of the prints made from films D, E and F of Table VI were compared to those of the check prints made from the 200 speed negatives.
  • the Status A density differences are given in Table XII for negatives given a normal neutral exposure. It is evident that the density deviations are much lower for prints made from film E and F of this invention.
  • the reductions in the blue density differences for prints from films E and F are particularly significant and result in prints that are much less yellow than those made from film D and very similar in color balance to prints made from the 200 speed check negatives.
  • FIG. 1 Another set of multilayer films was prepared that included a comparative film and films containing density correction dye DA23 of this invention.
  • the multilayer films were coated on the same support and with the same magnetic recording layer as the films of Example 4 with a similar coating structure, as shown in Table XIII.
  • Comparative film G contains 0.097 g/sq m of C2 in the yellow filter layer and 0.043 g/sq m of C2 in the antihalation layer (14).
  • Film H of this invention contains dye DA23 in the antihalation layer at 0.0365 g/sq m and film I of this invention contains 0.0365 g/sq m of dye DA23 in the slow magenta layer (8).
  • These films as well as commercially available 200 speed color negative film were given neutral exposures and processed using KODAK FLEXICOLOR C-41 processing chemistry.
  • the neutral steps of various density were then printed onto color print paper using an AGFA MSP automatic printer that was adjusted to provide optimum color balance for prints made from the 200 speed negatives.
  • the red, green and blue Status A densities of the prints were measured and the densities of the prints made from films G, H and I of Table XIII were compared to those of the check prints made from the 200 speed negatives.
  • the Status A density differences are given in Table XIV for negatives given a normal neutral exposure. It is evident that the density deviations are much lower for prints made from films H and I of this invention.
  • the reduction in the blue density differences for prints from films H and I are particularly significant and result in prints that, rather than being yellow like those from film G, are very similar in color balance to the prints made from the 200 speed check negatives.
  • Dispersions of yellow dye DA23 4.0 g of DA23 was dissolved in 8.0g of tricresylphosphate (S-1) and 12.0 g of ethyl acetate at 75°C. This oil phase was then combined with an aqueous phase solution consisting of 8.0 g of gelatin, 6.0 g of a 10% solution of Alkanol-XC (Dupont), and 62.0 g of distilled water. This mixture was then passed through a Gaulin colloid mill five times followed by removal of ethyl acetate by rotary evaporation. Distilled water was then added back to replace the ethyl acetate to form Dispersion A which consisted of 4.0% dye and 8.0% gelatin.
  • Dispersion B was prepared similarly except that 2.0 of 2,5-di-octylhydroquinone (R1) was also dissolved in the oil phase and 60.0 g of distilled water was used in the aqueous phase.
  • Dispersion C was similarly prepared using 4.0 g of R1 in the oil phase and 58.0 g of distilled water in the aqueous phase.
  • Dispersion D was also similarly prepared using 8.0 g of R1 in the oil phase and 54.0 g of distilled water in the aqueous phase.
  • Dispersion Microscopic Appearance (96h/45°C) A (Comparison) Severe crystallization, many long needles B (Invention) Some crystallization, several small needles C (Invention) Very few small needle-shaped crystals D (Invention) Some crystallization, several small plates
  • Dispersions E, F, and G were prepared as Dispersions A, C, and D, respectively, except that tricresylphosphate was replaced with tri-(2-ethylhexyl)phosphate (S-6). These dispersions were held for four hours at 45°C and then examined for dye crystallization. Results are summarized below in Table III. Dispersion Microscopic Appearance (4h/45°C) E (Comparison) Severe crystallization, many small needles F (Invention) Some small needle-shaped crystals G (Invention) Few small plate-like crystals
  • a Multilayer Color Negative Film of This Invention Comprising a Yellow Methine Dye of This Invention Codispersed with a Reducing Agent of This Invention.
  • the multilayer film structure utilized for this example is shown schematically in Table XIX. Structures of components not provided previously are given immediately following Table XIX. Component laydowns are provided in units of g/sq m unless otherwise indicated. Gelatin was used as a binder in the various layers of the multilayer film. These films may be processed using KODAK FLEXICOLOR C-41 processing chemistry. The film was readily manufactured and produced prints of proper color balance.

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Claims (10)

  1. Elément photographique négatif en couleurs multicouche comprenant un support, au moins une couche d'émulsion aux halogénures d'argent sensible à la lumière sensible à chacune des régions bleue, verte et rouge du spectre visible, une couche d'enregistrement magnétique et un colorant permanent corrigeant la densité, dans lequel :
    le maximum d'absorbance spectrale du colorant corrigeant la densité est compris entre 450 et 485 nm ;
    le rapport de l'absorbance du colorant corrigeant la densité à 480 nm par rapport à 420 nm est compris entre 1,2 et 3,5 ;
    le rapport de l'absorbance du colorant corrigeant la densité à 440 nm par rapport à 420 nm est compris entre 1,25 et 2,5 ;
    le rapport de l'absorbance du colorant corrigeant la densité à 510 nm par rapport à 480 nm est inférieur à 0,6 ; et
    le colorant est exempt de groupes chargés, de groupes carboxyle et de groupes sulfonate.
  2. Elément négatif en couleurs selon la revendication 1, dans lequel le log P du ou des colorant(s) corrigeant la densité calculé par la version 3.54 de Medchem est d'au moins 4,0.
  3. Élément négatif en couleurs selon la revendication 1, dans lequel :
    le colorant corrigeant la densité a un maximum d'absorbance compris entre 455 et 480 nm ;
    le rapport de l'absorbance à 480 nm par rapport à 420 nm est compris entre 1,3 et 3,0 ;
    le rapport de l'absorbance à 440 nm par rapport à 420 nm est compris entre 1,35 et 2,2 ; et
    le rapport de l'absorbance à 510 nm par rapport à 480 nm est inférieur ou égal à 0,55.
  4. Elément négatif en couleurs selon les revendications 1 à 3, dans lequel le colorant corrigeant la densité jaune ou jaune-orange est représenté par la structure I ci-dessous
    Figure 00870001
    où :
    R1 est l'hydrogène ou un groupe alkyle,
    R2 est un groupe alkyle ou aryle,
    R3 est l'hydrogène, un groupe alkyle, alcoxy ou aryloxy,
    R4 est l'hydrogène, un groupe alkyle ou alcoxy,
    R5 est l'hydrogène ou un groupe alkyle,
    R1 et R2, R2 et R3 ou R1 et R5 peuvent être joints pour former un cycle ; et
    EWG1 et EWG2 sont des groupes attracteurs d'électrons.
  5. Elément négatif en couleurs selon la revendication 4, dans lequel EWG1 est un groupe cyano.
  6. Élément photographique négatif en couleurs multicouche selon les revendications 1 à 5, dans lequel le colorant corrigeant la densité jaune ou jaune-orange est représenté par la structure III
    Figure 00870002
    où :
    R1 est l'hydrogène ou un groupe alkyle,
    R2 est un groupe alkyle ou aryle,
    R3 est l'hydrogène, un atome d'halogène, un groupe alkyle, alcoxy ou aryloxy,
    R4 est l'hydrogène ou un groupe alkyle,
    R5 est l'hydrogène ou un groupe alkyle,
    R6 est l'hydrogène ou un groupe alkyle,
    X est l'oxygène ou le soufre,
    chaque groupe R7 est indépendamment un substituant choisi parmi le groupe comprenant un atome d'halogène et des groupes alkyle, aryle, alcoxy, aryloxy, carbonamido, sulfonamido, carbamoyle, alcoxycarbonyle, aryloxycarbonyle et acyloxy, acyle, sulfamoyle, sulfonyle, sulfoxyle, alkylthio, arylthio et cyano,
    n est 0, 1, 2 ou 3 ; et
    R1 et R2 ou R2 et R3 peuvent être joints pour former un cycle.
  7. Elément négatif en couleurs selon la revendication 6, dans lequel R1 est l'hydrogène, R2 est un groupe alkyle, R3 est l'hydrogène ou un groupe alkyle, R4 est l'hydrogène, R5 est un groupe alkyle, R6 est l'hydrogène, X est l'oxygène, n est 0 ou 1 et, lorsque n est 1, R7 est un groupe alkyle, sulfonamido ou un atome d'halogène en position para par rapport à X.
  8. Elément négatif en couleurs selon les revendications 1 à 7, dans lequel le colorant méthine corrigeant la densité est choisi parmi le groupe comprenant :
    Figure 00890001
    Figure 00890002
    Figure 00890003
    Figure 00890004
    Figure 00890005
    Figure 00900001
    Figure 00900002
    Figure 00900003
    Figure 00900004
    Figure 00900005
    Figure 00910001
    Figure 00910002
    Figure 00910003
       and
    Figure 00910004
  9. Elément selon les revendications 6 à 8, dans lequel les colorants de structure III sont co-dispersés avec un ou plusieurs agents réducteurs hydroquinone, catéchol ou sulfonamidophénol.
  10. Elément photographique négatif en couleurs selon la revendication 9, dans lequel les agents réducteurs hydroquinone, catéchol ou sulfonamidophénol sont représentés par les structures IV, V et VI, respectivement,
    Figure 00920001
    Figure 00920002
    Figure 00920003
    où :
    chaque groupe R8 est indépendamment choisi parmi le groupe comprenant les groupes alkyle, carbonamido, carbamoyle, alcoxy, aryloxy et un atome de chlore et m est de 1 à 4 ;
    chaque groupe R9 est indépendamment choisi parmi le groupe comprenant les groupes alkyle, carbonamido, carbamoyle, alcoxy, aryloxy et un atome de chlore et q est de 1 à 4 ;
    R10 est un groupe aryle ou alkyle ; et
    R11 est un groupe aryle ou alkyle.
EP19960420318 1995-10-31 1996-10-28 Colorants corrigeant la densité pour films négatifs couleur comprenant des couches d'enregistrement magnétiques Expired - Lifetime EP0772081B1 (fr)

Applications Claiming Priority (12)

Application Number Priority Date Filing Date Title
US583394 1990-09-17
US698095P 1995-10-31 1995-10-31
US815795P 1995-10-31 1995-10-31
US829295P 1995-10-31 1995-10-31
US8157 1995-10-31
US6980 1995-10-31
US574510 1995-12-19
US08/574,510 US5725999A (en) 1995-10-31 1995-12-19 Methine yellow density correction dyes for color negative films with magnetic recording layers
US08/583,394 US5800971A (en) 1995-10-31 1996-01-05 Photographic element containing codispersions of yellow methine filter or density correction dyes and reducing agents
US584762 1996-01-11
US08/584,762 US5811228A (en) 1995-10-31 1996-01-11 Density correction dyes for color negative films with magnetic recording layers
US8292 2007-12-20

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US2298732A (en) * 1940-12-16 1942-10-13 Eastman Kodak Co Polymethine base
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US5314792A (en) * 1993-01-29 1994-05-24 Eastman Kodak Company Photographic element and process providing improved color rendition
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