US3552971A - Positive sheet for diffusion transfer - Google Patents
Positive sheet for diffusion transfer Download PDFInfo
- 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
- Authority
- 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
Links
- 238000009792 diffusion process Methods 0.000 title abstract description 17
- 239000002344 surface layer Substances 0.000 abstract description 23
- 229920000642 polymer Polymers 0.000 abstract description 13
- 239000003960 organic solvent Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007864 aqueous solution Substances 0.000 abstract description 5
- 229920001577 copolymer Polymers 0.000 description 14
- 239000010410 layer Substances 0.000 description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- -1 silver halide Chemical class 0.000 description 2
- 241001076939 Artines Species 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 241001594303 Lepidoscia polymeres Species 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 230000033458 reproduction Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Images
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
- G03C8/24—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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Decoration By Transfer Pictures (AREA)
Abstract
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.
Description
Jan. 5, 197 1 HARUQ TAKENAKA ETAL 3,552,971
POSITIVE SHEET FOR DIFFUSION TRANSFER Filed Dec. 5, 1967 I 'I' -l-"rl 5 -3- I" FT- 55 if 3 R 2 V INVENTORS HARUO TAKENAKA AKIYASU SHIOZAWA TADAHIRO FUJIWARA BY M, WM M ATTORNEYS United States Patent 3,552,971 POSITIVE SHEET FOR DIFFUSION TRANSFER Haruo Takenaka, Akiyasu Shiozawa, and Tadahiro Fujiwara, Kanagawa, Japan, assiguors to Fuji Photo Film Co., Ltd., Kanagawa, Japan Filed Dec. 5, 1967, Ser. No. 688,029 Claims priority, application Japan, Dec. 5, 1966, 41/ 79,680 Int. Cl. G03c 1/48, /54
US. Cl. 96-76 2 Claims ABSTRACT OF THE DISCLOSURE 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.
BACKGROUND OF THE INVENTION (1) Field of the invention 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).
(2) Description of the prior art 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. However, 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.
Therefore, 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.
SUMMAJRY OF THE INVENTION These and other objects of this invention can be at tained by using a polymer or a copolymer insoluble in water but soluble in an alkaline solution and an organic solvent as a material for the surface layer of a positive sheet for diffusion transfer.
DETAILED DESCRIPTION OF THE INVENTION As 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. For forming the surface layer, 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. In this case, it is most preferable to employ as the aforesaid polymer or copolymer one having a viscosity of 0.5-1.0 when measured by dissolving about 0.5 g. of the polymer or copolymer in ml. of a solvent mixture of methanol and acetone (6:4) at 30 C. and testing by means of an Ostwald viscometer.
Since 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. Moreover, 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.
The invention will be described by the following examples, in which part is part by weight.
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. Also, 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:
- 4 v I 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. 'In a positive sheet for diffusion transfer compris- 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
2. The positive sheet for difiusion transfer according CL to claim 1 wherein said surface layer on said image-re-
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 (en) |
| DE (1) | DE1597590C3 (en) |
| FR (1) | FR1548790A (en) |
| GB (1) | GB1150499A (en) |
Cited By (2)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0306561B1 (en) * | 1987-09-08 | 1991-12-11 | Agfa-Gevaert N.V. | Image-receiving material |
-
1967
- 1967-11-29 GB GB54420/67A patent/GB1150499A/en not_active Expired
- 1967-12-04 DE DE1597590A patent/DE1597590C3/en not_active Expired
- 1967-12-05 US US688029A patent/US3552971A/en not_active Expired - Lifetime
- 1967-12-05 FR FR1548790D patent/FR1548790A/fr not_active Expired
Cited By (2)
| 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 (en) | 1970-06-25 |
| DE1597590C3 (en) | 1974-10-24 |
| DE1597590B2 (en) | 1974-04-04 |
| FR1548790A (en) | 1968-12-06 |
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