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
  • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
  • G03C8/42—Structural details
  • G03C8/52—Bases or auxiliary layers; Substances therefor
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
  • Y10S430/142—Dye mordant

Definitions

• dye developers i.e., dyes containing a silver halide developing function and capable of developing a latent silver halide image
• the image-receiving elements employed in such processes generally comprise a support carrying thereon an image-receiving layer of a dyeable material which is permeable to the alkaline aqueous processing solution.
• Filmforming materials such as polyvinyl alcohol, mixtures of polyvinyl alcohol and poly-N-vinylpyrrolidone or a copolymer of vinyl alcohol and N-vinylpyrrolidone such as those disclosed and claimed in U.S. Pat. No. 3,003,872 are particularly suitable for use in such processes.
• nylons such as N-methoxymethylpolyhexamethylene adipamide; partially hydrolyzed polyvinyl acetate; cellulose acetate; gelatin; nitrocarboxymethyl cellulose as disclosed in U.S. Pat. No. 2,992,104; and acylamidobenzene sulfo ester of a partial sulfobenzal of polyvinyl alcohol, as disclosed in U.S. Pat. No. 3,043,692; polymers of N-alkyl-a,B-unsaturated carboxamides and copolymers thereof with N-alkyl-a,fl-carboxamides as disclosed in U.S. Pat.
• Image-receiving elements of the type herein contemplated preferably contain, in addition to the above-described layer adapted to receive an image by diifusion transfer, a layer of a polymeric acid positioned between said image-receiving layer and the support.
• a timing layer of an inert polymer is positioned between said image-receiving layer and said polymeric acid layer in order to provide a timed control for the alkali neutralizing action of said polymeric acid.
• the support for the image-receiving layer may comprise any suitable dimensionally stable layers including conventional rigid or flexible materials such as paper, metal, and polymeric films of both synthetic types and those derived from naturally occurring products.
• suitable dimensionally stable layers including conventional rigid or flexible materials such as paper, metal, and polymeric films of both synthetic types and those derived from naturally occurring products.
• Such materials include alkaline solution impermeable materials such as paper, polymethacrylate acid, methyl and ethyl esters; vinyl chloride polymers, polyvinyl acetal; polyamides such as nylon; polyesters such as polymeric films derived from ethylene glycol terephthalic acid; and cellulose derivatives such as cellulose acetate, triacetate, nitrate, propionate, butyrate, acetate-propionate, or acetate-butyrate.
• the preferred material is paper and more particularly baryta paper.
• U.S. Pat. No. 3,080,805 describes film units for forming diffusion transfer images wherein said film units, after being exposed Within a camera, are designed to be removed from the camera to complete the processing.
• the diffusion transfer process is initiated by the application of a processing composition as the film unit is withdrawn from the camera.
• the photosensitive element remains light-sensitive during the processing operation, the photosensitive element and the image-receiving element have been provided with opaque layers which are generally employed as coatings on or incorporated into the above-described support layers.
• a suitable opaque layer may be formed of dispersed carbon black; the particular composition of this opaque layer is not critical and may be varied among many available materials capable of providing the desired opacity.
• the photosensitive element may be provided with a suitable opaque layer by dispersing carbon black or some other opacifying material in or on the support at the time it is cast.
• the present invention is directed to an image-receiving element, particularly suited for use in diffusion transfer processing wherein development and image formation on an image-receiving layer of said image-receiving element is carried out outside of the camera and wherein said image-receiving element is adapted to be removed from superposed relationship with the photosensitive element subsequent to transfer image formation on said image receiving element.
• the novel image-receiving element of the present invention is composed of a base carrying on a first side a layer adapted to receive a diffusion transfer image and on a second side a first and second polymeric layer adapted to provide opacity, anticurl properties and water impermeability to the image-receiving element structure.
• the present invention is directed to an image-receiving element suitable for use in diffusion transfer photography, particularly color diffusion transfer photography, wherein the base or support carries on one side a layer adapted to receive the diffusion transfer image, preferably a hydrophilic polymer, and on the opposite side carries at least a first and second polymeric layer adapted to provide anticurl properties, opacity and water impermeability.
• the polymeric composition applied to the support is a watersoluble, i.e., hydratable, polymeric composition and is generally referred to for convenience as the anticurl coat.
• the outermost polymeric composition which is applied over the above-mentioned anticurl coat and which is thus located furthest from the support layer is composed of a water-insoluble, water vapor permeable polymeric material and is designated as the seal coat.
• the function of the combined anticurl coat and seal coat also includes opacification, that is, the prevention of actinic radiation from passing through the image-receiving element to interfere with the image formation and image transfer from the photosensitive element during processing.
• the opacifying materials may be employed in either the anticurl coat or the seal coat but preferably are dis tributed between both of the layers.
• the anticural coat may be employed of any suitable polymeric materials.
• the polymer employed is the same polymer as that employed in the image-receiving layer and is hydrophilic.
• a particularly preferred polymer is polyvinyl alcohol.
• suitable polymers include the cellulosics, i.e., cellulose acetate and cellulose acetate butyrate, polyethylene oxide polymers, hydroxyethyl cellulose, carboxymethyl cellulose and gelatin.
• the anticurl coat may be desired to modify the anticurl coat to impart a fiexibilizing property, for example, by the introduction of plasticizers for the polymer or by modifying the polymer itself; in the case of polyvinyl alcohol by employing partialy hydrolyzed polyvinyl alcohol or substituted polyvinyl alcohol, such as a polyvinyl alcohol internally plasticized with ethylene oxide.
• the opacification be accomplished by distributing between the anticurl coat and the seal coat the means for opacification.
• carbon black is employed in the anticurl coat.
• the composition employed for the anticurl coat may also include other additives such as wetting agents, thickeners, antifoamers, and the like. While the composition may be employed at any solids, it is preferred that solids of approximately 3040% be employed in order to minimize the number of coating layers that have to be applied and to minimize drying problems associated with the casting of the layer.
• the layer is applied from an aqueous medium although solvent solutions and dispersions may also be employed.
• the seal coat comprises a water-insoluble, moisture permeable polymer.
• the water-insoluble polymer employed in a carboxylated vinyl acetate/crotonic acid copolymer employed in a carboxylated vinyl acetate/crotonic acid copolymer.
• Such a polymer is preferably laid down from a water solution employing, for example, ammonium hydroxide, in order to solubilize the polymer. Evaporation of the water and ammonium hydroxide provides an insoluble polymeric layer, resistant to alakli.
• Other suitable materials include vinyl acetate/acrylic acid copolymer and latices of polymers such as acrylics, ethylene/ vinyl acetate copolymers, styrene/butadiene copolymers and other water-insoluble polymers known in the art. It has been found, unexpectedly, that the seal coat minimizes the tendency to embrittlement of the anticurl coat.
• the opacifying agent be incorporated into the seal coat.
• the opacifying agent employed be titanium dioxide for aesthetic purposes, however, silica gel, calcium carbonate, barium sulfate, talc and clays may also be suitably employed.
• opacitying agents will provide an optical reflection density of less than about 1.0 density units with respect to incident radiation.
• Other optional materials may be employed in the seal coat, for example, wetting agents, thickeners and antifoamers.
• the seal coat may be employed at varying levels of solids; preferably, a solids level of 24-36% will be employed.
• the seat coat will prevent rub-off of the polymer or opacifying agent employed in the anticurl coat and will also provide for slippage of the image-receiving element as it passes through the various exposure and developing functions.
• the support and opacifying agents together provide an optical transmission density in excess of 6.0 density units with respect to visible radiation.
• any suitable support may be employed for the novel photographic film unit of the present invention.
• natural and synthetic polymers conventionally employed as supports for positive photographic prints are suitable for use in the present invention.
• Particularly preferred is paper, and more particularly, baryta paper which may possess various degrees of aqueous permeability or sensitivity.
• a paper having a Cobb Size Test Level of 1% or less is preferred in order to minimize the absorption of water by the paper from the aqueous anticurl layer applied thereto.
• the anticurl coat may be cross-linked to provide a greater degree of dimensional stability and to permit the use of a thinner seal coat than would normally be necessary.
• some degree of water insolubility can be provided to the anticurl coat by means of cross-linking.
• Employing a cross-linking agent renders the edges less susceptible to damage by moisture contact at the film edges where the layer is exposed.
• the particular cross-linking agents will be selected with regard to the specific polymer employed and will be well known to the art.
• suitable cross-linking agents include glyoxal, sodium dichromate, zirconium nitrate, stearato chromic chloride, sodium borate, aluminum nitrate, chromium a etate and dimethylol. urea.
• Example I To one side of a cellulose nitrate subcoated baryta paper was applied a layer composed of a mixture of polyvinyl alcohol and poly-4-vinylpyridine. To the opposite side was applied as an anticurl coat, an aqueous solution of a 2:1 ratio of polyvinyl alcohol (99% hydrolyzed) and carbon black at an 18% solids level. The anticurl coat was dried and a seal coat composed of a 2:1 ratio of titanium dioxide and carboxylated vinyl acetate/crotonic acid copolymer in water was coated thereon. Ammonium hydroxide was employed to solubilize the polymer and the composition was applied at a level of 24% solids. The two polymer layers together provide a thickness of about 1.5 mils.
• the thus-prepared photographic element may be contacted with an aqueous alkaline processing composition on the surface containing the polyvinyl alcohol and poly- 4-vinylpyridine layer and pressed into contact with an exposed photosensitive sheet of the type used in Type 108 Polaroid Polacolor film to affect the processing of the latter and the formation of a dye transfer image in the image-receiving sheet.
• Sufficient pressure was applied to the combined elements to insure good wet contact between the superposed sheets.
• the image-receiving element may be separated and contain a positive multicolor transfer image.
• the thus-processed image-receiving element was maintained at 0% relative humidity for 72 hours. At the end of the test period, the element was examined and substantially no curl was observed.
• the polymer suitable for the anticurl coat and the seal coat have been described above primarily in terms of employing different polymers for each of said coats. It should be understood, however, that the same polymer may be employed for both coats but possessing differing characteristics in separate layers of the single polymer. For example an anticurl coat may be applied and then a cross-linking agent may be applied to the outer surface to cross-link the layer to a given depth, sufficient to impart the properties desired for the seal coat while at the same time retaining the properties for the anticurl coat.
• any of the suitable anticurl coats may be applied, e.g., a layer 0.5 to 1.5 mils in thickness and dried.
• the thus-formed layer may then be given a wash coat of a cross-linking agent to provide the desired degree and depth of cross-linking to the layer.
• a crosslinking agent may be incorporated therein and activated by, e.g., heat to provide the desired degree and depth f cross-linking. It is essential, however, that the cross-linlo ing be limited to a depth less than the total thickness of the layer. Cross-linking the entire thickness of the layer is detrimental to the anticurl properties.
• Example II To one side of a cellulose nitrate subcoated baryta paper was applied a layer composed of a mixtur eof polyvinyl alcohol and poly-4-vinylpyridine. To the opposite side was applied, as a aqueous solution of a 2:1 ratio of polyvinyl alcohol and carbon black at an 18% solids level to provide a layer 0.8 mil thick. The thus-formed coat was dried and a wash coat of 2% solution of glyoxal in water was applied thereto.
• the thus-prepared photographic element may be contacted with an aqueous alkaline processin composition on the surface containing the polyvinyl alcohol and poly- 4-vinylpyridine layer and pressed into contact with an exposed photosensitive sheet of the type used in Type 108 Polaroid Polacolor film to affect the processing of the latter and the formation of a dye transfer image in the image-receiving sheet.
• Sufiicient pressure was applied to the combined elements to insure good Wet contact between the superposed sheets.
• the image-receiving element may be separated and contain a positive multicolor transfer image.
• the thus-processed image-receiving element was maintained at 0% relative humidity for 72 hours. At the end of the test period, the element was examined and substantially no curl was observed.
• both the anticurl coat and the seal coat may be applied at a relatively wide range of solids.
• the solids may range from 15-45%, preferabl 24%.
• opacifying means may be provided to either or both of the layers. In a preferred embodiment, they are provided to both layers with a light-colored material, such as titanium dioxide, incorporated in the seal coat for aesthetic purposes. It should be understood that in addition to the pigments designated, dyes may be employed either alone or in conjunction with pigments in either one or in both the anticurl and seal coats to provde the desired level of opacification.
• An image-receiving element adapted to be used in processing an exposed photosensitive silver halide element by diffusion transfer processing outside of the camera in which exposure occurs, which comprises a support carryin on a first side a layer of a dyeable hydrophilic polymeric material which is permeable to alkaline processing composition adapted to receive a diffusion transfer image and, on a second side, in order, a first and second polymeric layer, said first layer consisting essentially of a hydrophilic polymeric composition and said second layer consistin essentially of a water-insoluble, moisture vapor permeable, polymeric composition, and a material for providing opacity to said element associated with said first and second layers.
• An element as defined in claim 1 which includes a polymeric acid layer intermediate said support and said layer adapted to receive a difiusion transfer image.
• An element as defined in claim 11 wherein said material for providing opacity comprises carbon black.
• An element as defined in claim 12 wherein said material for providing opacity includes titanium dioxide.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

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Cited By (7)

Family Cites Families (8)

• 1971
  • 1971-03-29 US US00129276A patent/US3752692A/en not_active Expired - Lifetime
• 1972
  • 1972-03-03 AU AU39617/72A patent/AU453081B2/en not_active Expired
  • 1972-03-17 IT IT49084/72A patent/IT952297B/it active
  • 1972-03-21 NL NLAANVRAGE7203745,A patent/NL169235C/nl not_active IP Right Cessation
  • 1972-03-23 FR FR7210217A patent/FR2132054B1/fr not_active Expired
  • 1972-03-27 JP JP3065072A patent/JPS5549299B1/ja active Pending
  • 1972-03-27 CA CA138,247A patent/CA979267A/en not_active Expired
  • 1972-03-28 GB GB1454272A patent/GB1388576A/en not_active Expired
  • 1972-03-28 BE BE781315A patent/BE781315A/xx not_active IP Right Cessation
  • 1972-03-29 DE DE2215392A patent/DE2215392C2/de not_active Expired

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