US3552971A - Positive sheet for diffusion transfer - Google Patents

Positive sheet for diffusion transfer Download PDF

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Publication number
US3552971A
US3552971A US688029A US3552971DA US3552971A US 3552971 A US3552971 A US 3552971A US 688029 A US688029 A US 688029A US 3552971D A US3552971D A US 3552971DA US 3552971 A US3552971 A US 3552971A
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US
United States
Prior art keywords
surface layer
diffusion transfer
positive
layer
positive sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US688029A
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English (en)
Inventor
Haruo Takenaka
Tadahiro Fujiwara
Akiyasu Shiozawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US3552971A publication Critical patent/US3552971A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
    • G03C8/24—Photosensitive materials characterised by the image-receiving section
    • G03C8/26—Image-receiving layers
    • G03C8/28—Image-receiving layers containing development nuclei or compounds forming such nuclei

Definitions

  • a positive sheet for diffusion transfer comprising a support, a subbing layer, an image-receiving layer and. a surface layer, said surface layer comprising a polymer insoluble in water and soluble in an alkaline aqueous solution and an organic solvent.
  • the present invention relates to an image receiving paper or film (hereinafter, it is called positive sheet in this specification) for photographic silver halide transfer process (diffusion transfer process).
  • a conventional positive sheet for diffusion transfer is usually composed of, as shown in the accompanying drawing, a support 1 such as a film or a paper, a subbing layer 2 formed thereon, a diffusion transfer emulsion layer 3 or positive print layer (hereinafter the layer is simply called the image-receiving layer) and a surface layer 4 having the property of easily peeling an imagebearing silver halide photosensitive negative paper therefrom, after images are transferred from the negative paper to the positive sheet.
  • the surface layer is usually formed by applying to the image-receiving layer a coating composition or an aqueous solution of a water-soluble polymer, such as carboxymethylcellulose, polyvinyl alcohol, hydroxyethylcellulose and the like.
  • such a conventional surface layer has the disadvantages that the difiusion transfer nuclei are denatured and decomposed due to the hygroscopic property of the surface layer, whereby the color tone and the density of the transferred image are degraded and thus the transferred image becomes unstable. Also, since the main solvent for forming the surface layer on the positive film is water, it takes a very long period of time to dry the surface layer thus formed, which makes the production of the positive films inefficient.
  • an object of this invention is to provide a positive sheet for diffusion transfer without having the aforesaid disadvantages and capable of providing stable and excellent images.
  • Another object of this invention is to provide a positive sheet for diffusion transfer having an improved surface layer which can be formed on the image-receiving layer thereof in a short period of time.
  • Still another object of this invention is to provide a method of preparing a positive sheet for diffusion transfer quickly and efficiently.
  • the polymer or copolymer used in this invention as a material for the surface layer, there are illustrated a copolymer of vinyl acetate and maleic anhydride, a coice polymer of methyl methacrylate and acrylic acid, a copolymer of acrylic acid and styrene, a carboxyvinyl poly mer sold under the trade name of Carbopol (Goodrich-Gulf Chemicals Co.) which is understood to be a copolymer of carboxymethylcellulose and vinyl acetate, and the like.
  • Carbopol Goodrich-Gulf Chemicals Co.
  • At least one of these polymers or copolymers may be applied to the image-receiving layer as a solution thereof in an organic solvent, such as acetone, methanol, ethanol, or a mixture thereof by a conventional coating method.
  • an organic solvent such as acetone, methanol, ethanol, or a mixture thereof.
  • the surface layer of the positive sheet of this invention formed by using the aforesaid polymer or copolymer is insoluble in water and soluble in an aqueous alkaline solution and an organic solvent, the positive diffusion transfer sheet of this invention shows low hygroscopicity and hence provides stable and excellent images thereon transferred from a negative paper. Further, since the copolymer or polymer for the surface layer is soluble in an organic solvent, the copolymer or polymer is applied to the emulsion layer as a solution in an organic solvent in the case of preparing the positive sheet, which shortens the drying time for the surface layer.
  • the surface layer is easily swelled when the positive sheet is wetted with an alkaline developer (which is generally highly alkaline), which makes fast the transfer procedure of images from a negative paper.
  • the reproductions obtained by using the positive dilfusion transfer sheet of this invention have a high transfer density as well as a high gradient.
  • EXAMPLE 1 Parts Maleic anhydride-vinyl acetate copolymer 3 Acetone v 60 Methanol 40
  • the drying time for the surface layer was about 5 of the drying time in a conventional case, where an aqueous solution was employed.
  • An image-bearing negative paper was superimposed on the positive diffusion transfer sheet thus prepared and they were processed in an alkaline developer to transfer images from the negative paper to the positive sheet.
  • the transfer density of the image thus obtained was about 30% higher than that obtained by using a conventional positive diffusion transfer sheet.
  • the stability of the images thus transferred was about twice as high as that in a conventional case.
  • EXAMPLE 2 The same procedure as in Example 1 was repeated while using a coating liquid having the following composition, as a coating liquid for the surface layer:
  • the positive diffusion transfer sheet had the same efceiving layer is the dried residue from a solution of the fects as those'of the'positive sheet in'Example l. polymer in'an organic-solvent? l were? What is claimed is: 1.
  • a positive sheet for diffusion transfer comprising- References Cited ing, in sequence, a support, a subbing layer, an image- 5 UNITED STATESPATENTS receiving layer and a surface layer, the improvement I 7 which comprises the surface layer consisting essentially 2719791 10/1955 Land of a polymer insoluble in Water and soluble in an akaline 3265505 8/1966 Yudelson T 9%7 aqueous solution and an organic solvent, said polymer WILLIAM M ARTIN, PrimaryEXaminer being selected from the group conslsting of a copolymer 1O 7 i of maleic anhydride and vinyl acetate and a copolymer HUSACK, ASSlStaIlt EXaIIllHer of methylmethacrylate and acrylic acid. r

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Decoration By Transfer Pictures (AREA)
US688029A 1966-12-05 1967-12-05 Positive sheet for diffusion transfer Expired - Lifetime US3552971A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7918066 1966-12-05
JP7968066 1966-12-05

Publications (1)

Publication Number Publication Date
US3552971A true US3552971A (en) 1971-01-05

Family

ID=26420232

Family Applications (1)

Application Number Title Priority Date Filing Date
US688029A Expired - Lifetime US3552971A (en) 1966-12-05 1967-12-05 Positive sheet for diffusion transfer

Country Status (4)

Country Link
US (1) US3552971A (de)
DE (1) DE1597590C3 (de)
FR (1) FR1548790A (de)
GB (1) GB1150499A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963495A (en) * 1973-03-20 1976-06-15 Fuji Photo Film Co., Ltd. Image-receiving element for silver salt diffusion transfer with layer of monoacrylates or monomethacrylates of polyhydric alcohols
US4366227A (en) * 1981-06-26 1982-12-28 Polaroid Corporation Diffusion transfer film unit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3775217D1 (de) * 1987-09-08 1992-01-23 Agfa Gevaert Nv Bildempfangsmaterial.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3963495A (en) * 1973-03-20 1976-06-15 Fuji Photo Film Co., Ltd. Image-receiving element for silver salt diffusion transfer with layer of monoacrylates or monomethacrylates of polyhydric alcohols
US4366227A (en) * 1981-06-26 1982-12-28 Polaroid Corporation Diffusion transfer film unit

Also Published As

Publication number Publication date
GB1150499A (en) 1969-04-30
DE1597590A1 (de) 1970-06-25
DE1597590B2 (de) 1974-04-04
FR1548790A (de) 1968-12-06
DE1597590C3 (de) 1974-10-24

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