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
  • G03C8/56—Mordant layers
• • 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

• Another object of this invention is to provide novel color diffusion transfer processes utilizing said imagereceiving elements.
• the invention accordingly comprises the several steps and the relation and order of one or more of such steps with respect to each of the others, and the products possessing the features, properties and the relation of elements which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.
• the present invention is particularly related to color diffusion transfer processes.
• a sheet of photosensitive material is exposed to create therein a latent image. image is developed and,
• imagetransfer terials is transferred by processing liquid to a superposed image-receiving layer to form a colored positive image thereon.
• dye developers i.e., dyes containing a
• the image-receiving elements used in such processes generally comprise an opaque or transparent support coated with an image-receiving layer of a dyeable material which is permeable to the alkaline aqueous processing
• the image-receiving elements of this invention are particularly useful in color diffusion transfer processes which employ dye developers.
• the improvements have been developing function. They may be further defined dyes which are silver halide developers.
• a silver halide developing function is meant a radical capable of developing an exposed silver halide image.
• a benzenoid developing radical in such compounds is a hydroquinonyl radical.
• oxidized dye developer dissolved in'the liquid processing as a function of the point-to-point degree At least part of this imagewise distribution of unoxidized is transferred, by imbibition, to a superposed imagereceiving layer or element, said transfer substantially exeluding oxidized dye developer.
• the image-receiving ele ment receives a depthwise diffusion, from the developed emulsion, of unoxidized dye developer without appreciably disturbing the imagewise distribution thereof to provide a reversed or positive color image of the developed image.
• novel image-receiving elements within the scope of this invention may be prepared by coating a sheet of a suitable film support such as cellulose acetate, cellulose acetate-coated baryta paper, etc., which may be suitably subcoated for proper adhesion, with a solution, preferably a 3 to solution, comprising the polyvinylpyridine polymer.
• a solution preferably a 3 to solution, comprising the polyvinylpyridine polymer.
• Such polymers are generally not soluble in water; however, by using a small amount of acid the image-receiving layers may be cast from aqueous solutions.
• volatile acids such, for example, as formic, acetic, etc., are used in applying the coatings.
• the coating and drying operations involved may be carried out by methods commonly employed in the art.
• the polyvinylpyridine polymer may comprise the sole dyeable film-forming material in the image-receiving layer or it may be added to other image receiving materials, e.g., gelatin, polyvinyl alcohol, etc.
• image receiving materials e.g., gelatin, polyvinyl alcohol, etc.
• Especially useful results have been obtained when the polyvinylpyridine polymers are used in combination with polyvinyl alcohol.
• the ratio of the polyvinylpyridine polymer to the other image-receiving materials may be varied to suit particular needs.
• the polyvinylpyridine polymers comprise 10 to 100% of the dyeable film-forming materials, with the broadest range being suitable, where polyvinyl alcohol is used.
• polyvinylpyridine polymers refers to polymers which comprise a major portion of vinylpyridine segments and more preferably to homopolymers of a vinylpyridine. As mentioned above, vinylpyridine polymers have been found particularly useful. Such 4-vinylpyridine polymers provide transfer images which are substantially denser than those produced on poly-Z-vinylpyridine image-receiving layers.
• polyvinylpyridine polymers for use in the imagereceiving layers of this invention may be prepared by polymerization techniques well known to the art.
• the following example illustrates the preparation of a polyvinylpyridine polymer for use in the image-receiving layers of this invention.
• EXAMPLE 1 50 grns. of 4-vinylpyridine, 0.63 gm. of benzoyl peroxide and 0.5 gm. of a 25% aqueous solution comprising 0.912 gm. of hide glue and 0.034 gm. of Nekal BA-75 (trade name of General Dyestufi Corporation, N,Y., N.Y., for a sodium alkyl naphthalene sulfonate), were placed in 100 cc. of distilled water and polymerized for 2 hours at 50 C. under nitrogen, using a high speed stirrer. The resulting mixture was poured into 3 liters of Water and the polymeric precipitate was filtered and washed with an excess of water. The polymer was dried under vacuum at 30 C.
• EXAMPLE 2 A sheet of subcoated baryta paper was coated with an aqueous solution containing a small amount of acetic acid and comprising:
• Percent Elvanol 72-60 (trade name of E. I. du Pont de Nemours & Co., Wilmington, Delaware for high viscosity, 100% hydrolyzed polyvinyl alcohol) 2.4 Poly-4-vinylpyridine 2.4 l-phenyl-S-mercaptotetrazole 0.08
• EXAMPLE 3 An image-receiving element was prepared as in Example 2 except that the aqueous coating solution comprised acetic acid and:
• Percent Elvanol 72-60 3.6 Poly-4-vinylpyridine 1.2 1-phenyl-S-mercaptotetrazole 0.08
• Example 6 An image-receiving element was made up as in Example A control image-receiving sheet was prepared by coating a subcoated baryta paper with an aqueous solution comprising:
• the photosensitive elements comprised a support carrying a red-sensitive silver halide emulsion stratum, a green-sensitive silver halide emulsion stratum and a blue-sensitive silver halide emulsion stratum; said emulsion having disposed in separate alkali-permeable layers behind them, respectively, a cyan dye developer, a magneta dye developer and a yellow dye developer.
• the particular dye developers employed in the photosensitive elements were (1) 1,4-bis-[a-methyl-B-(2,5'-dihydroxyphenyl) ethylamino]-5,8-dihydroxyanthraquinone (a cyan dye developer), (2) 2-[p-(2',5'-dihydroxyphenethyl)-phenylazo]-4-propoxy-1-napbthol (a magneta dye developer) and (3) l-phenyl-3-n-hexyl carboxarnidoi- [p-(hydroquinonylethyl)-phenylazo1-5-pyrazolone (a yellow dye developer).
• IMAGE RECEIVING ELEMENT OF EXAMPLE 2 Blue and green- Red and blue--. Red and green Total exposure N 0 exposure Ih/IAGE-REOEIVING ELEMENT OF EXAMPLE 3 Blue and green Red and blue Red and green Total exposure... N 0 exposure IMAGE-RECEIVING ELEMENT OF EXAMPLE 4 Blue and green 1 57 0.69 0 Red and blue 0 09 0.98 0 Red and green 0 03 0.28 1 Total exposure 0 08 0. 12 0 IMAGE-RECEIVING ELEMENT OF EXAMPLE 6 Blue and green 0. 73 0. 39 0.29 Red and blue 0. 11 0. 90 0.58 Red and green.-- 0. 04 0. 16 1. 30 Total exposure--. 0. 07 0. 09 0. 12 N 0 exposure 0 66 1. 42 2. 12
• polyvinylpyridines are used in combination with water-sensitive polymers, such, for example, as polyvinyl alcohol, it is preferable to also employ reagents such as hardeners, cross-linking agents, and other reagents which will reduce the water-sensitivity of the resulting layer.
• reagents such as hardeners, cross-linking agents, and other reagents which will reduce the water-sensitivity of the resulting layer.
• the transfer images produced on the image-receiving element of this invention in addition to having improved density, also possess improved brightness and gloss as compared to transfer images produced on polyvinyl alcohol alone.
• the image-receiving elements of this invention are an image-receiving element and a rupturable pod containing an aqueous alkaline processing solution.
• the elements and pod are so associated with each other that, upon processing, the photosensitive element may be superposed on the image-receiving element and the pod may be ruptured to spread the aqueous alkaline
• other materials useful in the diifusion transfer processes may be incorporated into the image-receiving layer. As examples of such materials, mention may be made of dye mordants, antifoggants, oxidizing agents, and acids and alkalies for pH adjustments.
• a process as defined receiving layer comprises 4-vinylpyridine.
• said imagegelatin in addition to said polyreceiving layer comprises said poly-4-vinylpyridine.
• a process as defined in claim 1 developer is an azo dye developer.
• said dye developer is an anthraquinone dye developer.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Optical Filters (AREA)

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Cited By (52)

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Citations (10)

• 0
  • BE BE607372D patent/BE607372A/xx unknown
• 1960
  • 1960-08-22 US US50848A patent/US3148061A/en not_active Expired - Lifetime
• 1961
  • 1961-08-21 GB GB30109/61A patent/GB938866A/en not_active Expired
  • 1961-08-22 DE DEJ20439A patent/DE1138319B/de active Pending

Patent Citations (10)

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