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
• • 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
  • G03C8/02—Photosensitive materials characterised by the image-forming section
  • G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
  • G03C8/06—Silver salt diffusion transfer

Definitions

• images of very good quality can be obtained by contacting an image-wise exposed light-sensitive material comprising a silver halide emulsion layer and a top layer of a water-permeable colloid in the presence of a developing substance, a complexing agent for silver halide and a treating liquid comprising developing nuclei and/ or substances capable of forming such nuclei with an image-receiving material which is not specially pretreated with developing nuclei and by separating the both materials from each other.
• the top layer of a water-permeable colloid may be a top layer of a gelatin-free, water-permeable colloid and the complexing agent for silver halide may be present in the treating liquid.
• a suitable image-receiving material may be selected from the group consisting of paper, film, textile, ceramic, metal, etc.
• an image-receiving material comprising a support and at least one auxiliary layer by wetting an image-wise exposed light-sensitive material, comprising a support and a light-sensitive silver halide emulsion layer coated with a layer wherein a diffusion transfer image can be formed, with treating liquid, pressing said light-sensitive material against said image-receiving material and then separating both materials, the layer wherein the diffusion transfer image can be formed and the top layer of the image-receiving material being chosen in such a way that, when separating the lightsensitive material from the image-receiving material, the layer wherein the diffusion transfer image can be formed is at least partially transferred to the image-receiving ma- Ice terial, wherein the development nuclei for the complexed silver halide or the substances which may form development nuclei are incorporated into the treating liquid.
• the image-wise exposed light-sensitive material can be passed through the treating liquid together with the image-receiving material or both materials can be wetted on one side with treating liquid and then brought into contact with each other for instance by pressing both materials together between two rubber rollers whereupon both materials are separated.
• the layer present on the light-sensitive silver halide emulsion layer comprising the positive image is transferred hereby at least partially to the imagereceiving material.
• the image-receiving material for use in the process according to the present invention may consist of a support for instance of paper, film, textile, ceramics, metal etc. or may consist of such a support on which at least one layer is present, the top layer being of such a nature that the layer present on the light-sensitive silver halide emulsion layer is at least partially transferred thereto When'separ'ating the light-sensitive and image-receiving material which were brought into contact with each other;
• the image-receiving material consists of a support coated for instance with a so-called baryta-coated layer having as binding agent a protein as gelatin or casein.
• baryta-coated layer having as binding agent a protein as gelatin or casein.
• barium sulfate still other pigments may be applied such as kaolin titanium dioxide and the protein binding agent may also be wholly or partially replaced by polymerisation products such as for instance copolymers of butadiene and styrene, poly(styrene), copolymers of vinyl chloride and vinylidene chloride, copolymers of vinyl alkyl ethers and maleic anhydride or by mixtures of said products.
• one or more layers of the image-receiving material substances may be incorporated which play a prominent part in the formation of the diffusion transfer image such as black-toning agents among others those described in British patent specification 561,875 and in Belgian patent specification 502,525, complexing agents for the silver halide such as sodium thiosulfate, developing substances, anti-yellowing agents, optical bleaching agents, alkalis, softening agents etc.
• the light-sensitive material comprises a support for instance of paper coated with a light-sensitive silver halide emulsion layer and with a top layer mostly of a gelatin-free, water-permeable colloid.
• the top layer is of such a nature that a diffusion transfer image can be formed therein and that it can be transferred to the imagereceiving material in the way described above.
• the emulsion composition is that of a conventionally used emulsion in the art of diffusion transfer.
• the emulsion composition is not critical provided its silver salt(s) is(are) capable of development and diffusion in the exposed and non-exposed areas respectively with the rapidly required in diffusion transfer processes.
• Silver chloride emulsions which may contain silver bromide or silver iodide, and to which other ingredients have been added so as to impart the desired emulsion characteristics are referably used.
• the light-sensitive emulsion is usually applied in such a way that per sq. m. of light-sensitive material an amount of silver halide is present equivalent to from 0.2 to 2 g. of silver. Any such emulsion can be hardened or slightly hardened.
• Appropriate binding agents for the layer coated on the light-sensitive silver halide emulsion layer are among others the following water-permeable colloids: methyl cellulose, the sodium salt of carboxy methyl cellulose, hydroxy ethyl cellulose, hydroxy ethyl starch, hydroXy propyl starch, sodium alginate, gum tragacanth, starch, poly(vinyl alcohol), poly(acrylic acid), poly(acry1 amide), poly(vinyl pyrrolidone), poly(oxyethylene), copoly(methyl vinyl ether/maleic acid), etc.
• This water-permeable layer is preferably not hardened.
• some substances may be incorporated for instance developing substances such as 3-pyrazolidone developers and hydroquinone, softening agents, black-toning agents and the like.
• a complexing agent for silver halide may be present, such as sodium thiosulfate, the amount being preferably comprised between 5 and 20 g. per litre of treating liquid, further still other substances playing a part in the diffusion transfer process may be incorporated such as alkalis, developing substances and black-toning agents such as those described in the above cited patent specifications.
• development nuclei for complexed silver halide and/or substances which may form development nuclei for instance by reaction with complexed silver halide are present in the treating liquid in amounts comprised between 0.01 and 1 g. per litre.
• development nuclei for complexed silver halide is understood nuclei for physical development as well as ingredients for chemical image formation.
• Development nuclei for complexed silver halide which are suitable for being used in a process according to the present invention are sulfides, selenides, polysulfides, polyselenides, thioureas, mercaptanes, stannous halides, heavy metals or their salts and fogged silver halide.
• Sulfides of heavy metals such as of antimony, bismuth, cadmium, cobalt, lead, nickel and silver are also suited.
• Lead sulfide and zinc sulfide as well as the complex salts thereof are especially effective either in themselves or mixed with thio-acetamide, dithiobiuret and dithiooxamide.
• the heavy metals silver, gold, platinum, palladium and mercury arc to be mentionad, preferably in colloidal form. The noble metals among them are the most active.
• Example 1 A light-sensitive material is prepared by coating a paper support of g./ sq. m. with a gelatino silver chloride emulsion as usual hardened with formaldehyde. This emulsion is coated in such a way that 1 g. of silver is present per sq. m. Hereupon an after layer of the sodium salt of carboxy methyl cellulose is applied in such a way that 0.5 g. is present per sq. In.
• the light-sensitive material is image-wise exposed and passed through a developing solution in a developing apparatus for diffusion transfer together with a sheet of common paper which is used as image-receiving material and which is pressed against this light-sensitive material.
• the developing solution has the following composition:
• Example 2 Example 1 is repeated adding, however, to the developing solution 0.05 g. of l-phenyl-S-mercapto-l,2,3,4-tetrazole. In this way a positive print is obtained having a more black image tone than that of Example 1.
• Example 3 A light-sensitive material is prepared by coating 21 paper support of 90 g./sq. m. with a gelatino silver chloride emulsion which is hardened as usual with formaldehyde. This emulsion is coated in such a way that 1 g. of silver is present per sq. m.
• an after layer is applied from the following solution:
• PAM 75 (trade name for a polyacrylamide marketed by American Cyanamid Company, New N.Y., U.S.A.) g 10 12.5% aqueous saponine cm. 5
• This solution is coated in such a way that 0.5 g. of dry substance is present per sq. m.
• This light-sensitive material is image-wise exposed to an original and passed through the developing solution described in Example 1.
• This developed material is pressed against a dry sheet of common paper. After a short contact time both materials are separated. An excellent positive image of the original is obtained.
• Example4 The process of Example 3 is repeated, by using however a light sensitive material which instead of being coated over with a polyacrylamide layer is coated over with a top layer from the following solution in a proportion of 1 liter per 20 m Water cm. 1000 Hydroxyethyl starch having a substitution degree of 0.27 of hydroxyethyl groups g 40 10% aqueous saponine cm. l
• Example 5 A light-sensitive material is manufactured by coating .onto a paper support of 90 g./sq. m. a silver chloride emulsion in such a way that 1.33 g. of silver chloride is .present'per sq. m. Then at 45 C. an after layer is applied to said silver halide layer from the following solu- 'tion:
• the solution is coated onto the silver chloride layer in such a way that 1 litre covers 10 sq. In.
• An image-receiving material is manufactured by coating at 45 C. a paper support of 90 g./sq. m. with the following composition:
• the light-sensitive material is now image-wise exposed and together with the image-receiving material passed through a ordinary diffusion transfer developing apparatus containing a solution of the following composition:
• Example 6 A light-sensitive material as described in Example 5 is wetted after image-wise exposure at one side with the treating liquid of Example 5 containing, however, no sodium thiosulfate. This negative material is then pressed against a dry image-receiving material manufactured by coating at 45 C. a paper support of 90 g./sq. m. with the following composition:
• Example 7 The process of Example 6 is repeated using:
• Example 5 (2) an image-receiving material manufactured as in Example 5 the coating composition containing, however, also 25 cm. of a 1% solution of l-phenyl-S-mercaptotetrazole in ethanol, and
• the light-sensitive material is once again wetted with treating liquid and pressed against a second dry image receiving material. In this way two positive copies of a same exposed light-sensitive material are obtained.
• Example 8 A light-sensitive material as described in Example 5 is passed after image-wise exposure, together with an imagereceiving material manufactured as described below, through a treating liquid as described in Example 5 containing, however, no sodium thiosulfate and no l-phenyl- S-mercapto-tetrazole.
• the image-receiving material used is manufactured by coating at 45 C. onto a paper-support of g./ sq. m. the following composition:
• Example 9 A light-sensitive material as described in Example 5, the after-layer of which is coated from the coating composition described in Example 5 but containing in addition thereto 10 cm. of a 1% solution of l-phenyl-S-mercaptotetrazole in ethanol, is wetted after image-Wise exposure with the treating liquid of Example 7. Then it is pressed against a dry image-receiving material as described in Example 5 and brought between heated plates. Immediately dry copies of good quality are obtained.
• Example 0 The process described in Example 5 is repeated using, however, an image-receiving material manufactured by coating a paper support of 90 g./sq. m. with the following composition:
• Said composition is applied in such a way that 1 litre covers 40 sq. m. of support.
• Example 11 The process according to Example 10 is repeated using, however, in the manufacture of the image-receiving material the following composition:
• the light-sensitive material is wetted therewith whereupon it is pressed against the dry image-receiving material.
• Example 12 The process of Example 11 is repeated by using, however, a light-sensitive material which instead of being coated over with a polyacrylamide layer is coated over with a top layer from the following solution in a proportion of 1 litre per 20 sq. m.
• a process for producing an image on an image-receiving material which comprises the steps of:
• a light-sensitive material comprising a silver halide emulsion layer and an external water-permeable colloid layer, said colloid layer being adapted to have an image formed therein by diffusion of a complexed silver halide from said emulsion layer, said layer being further adapted to adhesively transfer at least a stratum thereof to said image-receiving material when the materials are brought into contact,
• said image-receiving material comprises a paper support and a layer containing a binding agent comprised essentially of a protein or a synthetic polymer.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Inorganic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Structural Engineering (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)
• Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
• Silver Salt Photography Or Processing Solution Therefor (AREA)
• Thermal Transfer Or Thermal Recording In General (AREA)

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  • GB GB1052022D patent/GB1052022A/en active Active
  • NL NL110905D patent/NL110905C/xx active
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  • NL NL281743D patent/NL281743A/xx unknown
  • BE BE616377D patent/BE616377A/xx unknown
• 1962
  • 1962-04-12 CH CH448362A patent/CH408640A/fr unknown
  • 1962-04-12 DE DEG34709A patent/DE1171740B/de active Pending
  • 1962-04-13 SE SE4166/62A patent/SE305803B/xx unknown
  • 1962-04-13 GB GB14487/62A patent/GB1001558A/en not_active Expired
• 1963
  • 1963-08-03 DE DEG38396A patent/DE1175549B/de active Pending
  • 1963-08-05 US US300100A patent/US3335005A/en not_active Expired - Lifetime
  • 1963-08-05 CH CH965363A patent/CH458062A/fr unknown

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