US3532497A - Nuclei for use in solvent transfer systems - Google Patents
Nuclei for use in solvent transfer systems Download PDFInfo
- Publication number
- US3532497A US3532497A US300088A US3532497DA US3532497A US 3532497 A US3532497 A US 3532497A US 300088 A US300088 A US 300088A US 3532497D A US3532497D A US 3532497DA US 3532497 A US3532497 A US 3532497A
- Authority
- US
- United States
- Prior art keywords
- nuclei
- silver
- salt
- sulfide
- metal
- 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
- 239000002904 solvent Substances 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 description 32
- 239000002184 metal Substances 0.000 description 32
- 229910052709 silver Inorganic materials 0.000 description 28
- 239000004332 silver Substances 0.000 description 28
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 24
- 150000003839 salts Chemical class 0.000 description 23
- 238000000034 method Methods 0.000 description 22
- 150000003346 selenoethers Chemical class 0.000 description 17
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 15
- 238000009792 diffusion process Methods 0.000 description 15
- -1 silver halide Chemical class 0.000 description 15
- 108010010803 Gelatin Proteins 0.000 description 13
- 229920000159 gelatin Polymers 0.000 description 13
- 239000008273 gelatin Substances 0.000 description 13
- 235000019322 gelatine Nutrition 0.000 description 13
- 235000011852 gelatine desserts Nutrition 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 239000000084 colloidal system Substances 0.000 description 10
- 229910052976 metal sulfide Inorganic materials 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 9
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 8
- 229910021612 Silver iodide Inorganic materials 0.000 description 8
- 229940045105 silver iodide Drugs 0.000 description 8
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 8
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910017052 cobalt Inorganic materials 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 6
- 238000001556 precipitation Methods 0.000 description 6
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229910052759 nickel Inorganic materials 0.000 description 5
- 230000000737 periodic effect Effects 0.000 description 5
- 239000012736 aqueous medium Substances 0.000 description 4
- 239000007900 aqueous suspension Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910001961 silver nitrate Inorganic materials 0.000 description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 4
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 3
- 238000011534 incubation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 150000004763 sulfides Chemical class 0.000 description 3
- 125000000101 thioether group Chemical group 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 2
- 229910052946 acanthite Inorganic materials 0.000 description 2
- 229920002301 cellulose acetate Polymers 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 2
- 229940056910 silver sulfide Drugs 0.000 description 2
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 2
- AFBBKYQYNPNMAT-UHFFFAOYSA-N 1h-1,2,4-triazol-1-ium-3-thiolate Chemical compound SC=1N=CNN=1 AFBBKYQYNPNMAT-UHFFFAOYSA-N 0.000 description 1
- WMTPKWUDOPDAIS-UHFFFAOYSA-N 5-methyl-1,3,5-triazinane-2-thione Chemical compound CN1CNC(=S)NC1 WMTPKWUDOPDAIS-UHFFFAOYSA-N 0.000 description 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- KDSXXMBJKHQCAA-UHFFFAOYSA-N disilver;selenium(2-) Chemical compound [Se-2].[Ag+].[Ag+] KDSXXMBJKHQCAA-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LVIYYTJTOKJJOC-UHFFFAOYSA-N nickel phthalocyanine Chemical compound [Ni+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 LVIYYTJTOKJJOC-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- 229940054334 silver cation Drugs 0.000 description 1
- JUDUFOKGIZUSFP-UHFFFAOYSA-M silver;4-methylbenzenesulfonate Chemical compound [Ag+].CC1=CC=C(S([O-])(=O)=O)C=C1 JUDUFOKGIZUSFP-UHFFFAOYSA-M 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- This invention concerns nuclei and the preparation of nuclei for use in photographic solvent transfer systems.
- the solvent transfer or diffusion transfer system as described in Rott US. Pat. 2,352,014 is a photographic process in which an exposed silver halide emulsion is developed in the presence of a silver halide solvent and contacted against a receiving support having thereon silver precipitating nuclei.
- the soluble silver halide diffuses imagewise from the undeveloped areas of the silver halide emulsion to the nuclei where silver is precipitated to form a positive image.
- Metal sulfide or selenide nuclei have been found to be particularly suitable for use in the diffusion transfer process when prepared in very fine particle size. However, it has been customary for these nuclei to be prepared fresh prior to coating, since they have often had poor stability on standing. For instance, when a dispersion of the nuclei was permitted to stand, the dispersion would appear to lose density, possibly due to a bleaching effect, so that the nuclei would no longer be of practical use.
- nuclei obtained by mixing a metal (other than silver) sulfide or selenide with a silver salt possess improved photographic qualities over nuclei previously known in the art when used in the diffusion transfer system.
- One object of this invention is to provide improved nuclei for use in the diffusion transfer system. Another object is to provide nuclei which result in higher maximum density, more neutral tones, improved tonal reproduction, and longer stability over previously known nuclei. A further object is to provide a process of making nuclei for use in the diffusion transfer system. An additional object is to provide nuclei by blending a metal sulfide or selenide and a silver salt to provide a synergistic effect.
- the above objects are attained by blending a metal sulfide or selenide (with the exception of these containing a silver cation) and a silver salt in a molar ratio of silver salt to metal sulfide or selenide of about 1:20 to 5:1, with particularly good results being obtained between about 1:10 and 1:1.
- the nuclei have an average particle size of from about 7 A. to 2,500 A.
- nickel sulfide nuclei When nickel sulfide nuclei are to be precipitated, a particularly suitable method is to prepare a dilute gelatin solution or similar colloid solution in which one of the 3,532,497 Patented Oct. 6, 1970 reactants is then dissolved, such as sodium sulfide. A solution of nickelous nitrate is then dumped into the mixture and activated rapidly to provide a rapid reaction between the two reactants and to prepare finely-divided nuclei. Silver iodide can then be precipitated in a similar manner by mixing aqueous potassium iodide and silver nitrate solution. The silver iodide can then be mixed with the nickelous sulfide.
- metal sulfides or selenides which can be used are those of nickel, copper, iron, cobalt and the metals of groups II-B and IV-B of the Periodic Table, e.g., cadmium, zinc, cobalt, lead, and the like.
- the silver salts which can be used include silver iodide, silver bromide, silver chloride, silver nitrate, p-toluenesulfonic acid silver salt, etc., provided the silver salt is more soluble in an aqueous hydrophilic colloid emulsion than the metal sulfide or selenide. Both the silver salt and the metal sulfide or selenide will, of course, be more water-soluble than silver sulfide or silver selenide.
- Nickel sulfide nuclei are produced by adding 19 ccs. of 1.0 N sodium sulfide to a precipitation vessel containing 50 grams of 10 percent gelatin solution and 1435 ccs. of water at a pH of about 5.7 and a temperature of about 104 F. About 5 seconds after the addition of the sodium sulfide solution, a solution containing 20.8 ccs. of 1.0 N nickelous nitrate and 535 ccs. of water is dumped into the reaction mixture over a period of 10 seconds with rapid mechanical agitation. At the end of the addition, the nuclei are stirred for 30 seconds at 104 F. Four hundred fifty grams of a 10 percent gelatin solution are then added and the nuclei stirred at 104 F. for an additional 15 minutes.
- EXAMPLE 2 Silver iodide nuclei are prepared as in Example 1 by substituting potassium iodide for sodium sulfide and substituting silver nitrate for nickelous nitrate.
- a receiving sheet is prepared as follows:
- a dispersion is prepared with 500 grams of the nickel sulfide nuclei dispersion of Example 1, 100 grams of the silver iodide nuclei dispersion of Example 2, 380 grams of a 10 percent gelatin solution and 1783 ccs. distilled water. To this dispersion, while stirring at 104 F., are added 30 ccs. as a 1 percent solution in methanol of 1- methyl-1,2,3,6-tetrahydro-1,3,5-triazine-4-thiol, 60 ccs. as a 1 percent solution in methanol of 3-mercapto-1,2,4- triazole, and 44 ccs.
- a silver bromoiodide emulsion is coated on a white pigmented cellulose acetate support at a coverage to yield 59.3 mg. silver and 550 mg. gelatin per square foot.
- a gelatin overcoat is applied over this layer at a coverage to yield 146 mg. gelatin per square foot.
- This negative element is exposed to light of daylight quality in an intensity scale sensitometer containing an 0.6 neutral density filter for 0.1 second. After exposure, the negative is soaked for 6 seconds in the following developer solution.
- the negative is then immediately brought in contact with the receiver sheet of Example 3. After 2 minutes, the negative element is separated from the receiver sheet to yield a high quality continuous tone black-and-whit'e print on the receiver sheet.
- EXAMPLE 5 Dispersions were prepared with nuclei as described in Example 3 as shown in the following table, except that for the control nuclei wherein only the metal sulfide was used without the addition of the silver halide, 500 ccs. of the dispersion prepared as described in Example 1 was used. Nuclei which had been prepared according to Examples 1 and 2, were tested for stability: fresh, after one week incubation, and after four weeks incubation. At the end of these incubation periods, the coating mixtures were prepared as in Example 3 and were tested for photographic properties by coating on a receiving support as described in Example 3 and processed as in Example 4. The resulting densities are shown in the following table.
- nuclei in a photographic diffusion transfer process.
- the improved nuclei of this invention can be used in the conventional binders and substrates and in any of the known embodiments of the diffusion transfer process and may be used with the photographic silver halide emulsions known in the art. These nuclei may also be used in layers in conjunction with other components such as those disclosed in the art.
- noble metals may be used in place of silver such as gold, platinum, etc.
- a mixture may be used of the metal nuclei blended with at least one noble metal salt.
- Silver precipitation nuclei useful in the silver salt diffusion transfer process obtained by admixing in the absence of a silver halide complexing agent 4 (a) at least one salt selected from the class consisting of sulfides and selenides of a metal other than silver, selected from the class consisting of nickel, copper, iron, cobalt and the metals of Groups II-B and IV-B of the Periodic Table with (b) at least one silver salt which is more water soluble than the said metal selenide or metal sulfide.
- a silver halide complexing agent 4 (a) at least one salt selected from the class consisting of sulfides and selenides of a metal other than silver, selected from the class consisting of nickel, copper, iron, cobalt and the metals of Groups II-B and IV-B of the Periodic Table with (b) at least one silver salt which is more water soluble than the said metal selenide or metal sulfide.
- nuclei of claim 1 wherein the said silver salt and the said metal salt are admixed in an aqueous medium containing a water permeable, hydrophilic colloid.
- a receiving sheet for use in the diffusion transfer photographic process comprising a support having thereon a layer containing the nuclei of claim 1.
- a receiving sheet for use in the diffusion transfer process comprising a paper support having coated thereon a layer containing a water permeable, hydrophilic colloid and nuclei of claim 1.
- Silver precipitation nuclei useful in the silver salt diffusion transfer process obtained by admixing (a) at least one salt selected from the class consisting of sulfides and selenides of a metal other than silver, selected from the class consisting of nickel, copper, iron, cobalt and the metals of Groups II-B and IV-B of the Periodic Table with (b) at least one silver salt selected from the class consisting of silver iodide, silver bromide, silver chloride and silver nitrate.
- Nuclei of claim 14 which have an average particle size of 7 A. to 2500A.
- a receiving sheet for use in the diffusion transfer photographic process comprising a support having thereon a layer containing the nuclei of claim 14.
- a receiving sheet for use in the diffusion transfer process comprising a paper support having coated thereon a layer containing a water permeable, hydrophilic colloid and nuclei of claim 14.
- a method of making positive photographic images comprising developing an exposed photographic silver halide element with a photographic silver halide developing solution, dissolving unexposed silver halide in a silver halide solvent, diffusing imagewise the unexposed silver halide from said photographic element in contiguity with silver precipitation nuclei to a receiving surface placed in close contiguity to said silver halide element, the step of employing a receiving sheet having thereon silver precipitation nuclei obtained by admixing, in the absence of a silver halide complexing agent.
- nuclei are present in a layer coated on the surface of said receiving sheet, said layer comprising in addition to said nuclei, a Water permeable, hydrophilic colloid.
- a process of claim 26 in which the molar ratio of said silver salt to said metal salt is within the range of about 1:20 and 5:1.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30008863A | 1963-08-05 | 1963-08-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3532497A true US3532497A (en) | 1970-10-06 |
Family
ID=23157655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US300088A Expired - Lifetime US3532497A (en) | 1963-08-05 | 1963-08-05 | Nuclei for use in solvent transfer systems |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3532497A (de) |
| DE (1) | DE1291997B (de) |
| GB (1) | GB1080781A (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3969541A (en) * | 1971-03-26 | 1976-07-13 | Fuji Photo Film Co., Ltd. | Diffusion transfer image receptive materials |
| US3987221A (en) * | 1970-07-07 | 1976-10-19 | Minnesota Mining And Manufacturing Company | Method for preparing receptor sheet for use in photographic diffusion process |
| US5310629A (en) * | 1991-06-28 | 1994-05-10 | Eastman Kodak Company | Silver recovery element and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2698237A (en) * | 1954-08-16 | 1954-12-28 | Polaroid Corp | Photographic silver halide transfer product and process |
| US2698245A (en) * | 1946-04-13 | 1954-12-28 | Polaroid Corp | Photographic product and process for making a positive transfer image |
| US2765240A (en) * | 1953-01-15 | 1956-10-02 | Polaroid Corp | Process for forming print-receiving elements |
| GB878064A (en) * | 1959-07-20 | 1961-09-27 | Ilford Ltd | Improvements in or relating to photographic reproduction processes |
| US3042514A (en) * | 1959-08-06 | 1962-07-03 | Gen Aniline & Film Corp | Diffusion-transfer reversal process |
| US3313625A (en) * | 1964-01-09 | 1967-04-11 | Polaroid Corp | Novel photographic products and processes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE444702A (de) * | 1941-01-24 | |||
| DE869008C (de) * | 1950-01-13 | 1953-03-02 | Bayer Ag | Verfahren zur direkten Herstellung von Positiven |
| BE574229A (de) * | 1957-12-30 |
-
1963
- 1963-08-05 US US300088A patent/US3532497A/en not_active Expired - Lifetime
-
1964
- 1964-08-04 DE DEE27543A patent/DE1291997B/de active Pending
- 1964-08-05 GB GB31751/64A patent/GB1080781A/en not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2698245A (en) * | 1946-04-13 | 1954-12-28 | Polaroid Corp | Photographic product and process for making a positive transfer image |
| US2765240A (en) * | 1953-01-15 | 1956-10-02 | Polaroid Corp | Process for forming print-receiving elements |
| US2698237A (en) * | 1954-08-16 | 1954-12-28 | Polaroid Corp | Photographic silver halide transfer product and process |
| GB878064A (en) * | 1959-07-20 | 1961-09-27 | Ilford Ltd | Improvements in or relating to photographic reproduction processes |
| US3042514A (en) * | 1959-08-06 | 1962-07-03 | Gen Aniline & Film Corp | Diffusion-transfer reversal process |
| US3313625A (en) * | 1964-01-09 | 1967-04-11 | Polaroid Corp | Novel photographic products and processes |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3987221A (en) * | 1970-07-07 | 1976-10-19 | Minnesota Mining And Manufacturing Company | Method for preparing receptor sheet for use in photographic diffusion process |
| US3969541A (en) * | 1971-03-26 | 1976-07-13 | Fuji Photo Film Co., Ltd. | Diffusion transfer image receptive materials |
| US5310629A (en) * | 1991-06-28 | 1994-05-10 | Eastman Kodak Company | Silver recovery element and method |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1291997B (de) | 1969-04-03 |
| GB1080781A (en) | 1967-08-23 |
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