US2592298A - Photographic reversal process using high-intensity flash exposure - Google Patents
Photographic reversal process using high-intensity flash exposure Download PDFInfo
- Publication number
- US2592298A US2592298A US141833A US14183350A US2592298A US 2592298 A US2592298 A US 2592298A US 141833 A US141833 A US 141833A US 14183350 A US14183350 A US 14183350A US 2592298 A US2592298 A US 2592298A
- Authority
- US
- United States
- Prior art keywords
- intensity
- light
- image
- layer
- developer
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 239000000839 emulsion Substances 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000004332 silver Substances 0.000 claims description 5
- -1 SILVER HALIDE Chemical class 0.000 claims description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Natural products NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- QMJDEXCUIQJLGO-UHFFFAOYSA-N [4-(methylamino)phenyl] hydrogen sulfate Chemical compound CNC1=CC=C(OS(O)(=O)=O)C=C1 QMJDEXCUIQJLGO-UHFFFAOYSA-N 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten 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
- G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
- G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
- G03C7/407—Development processes or agents therefor
- G03C7/413—Developers
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/485—Direct positive emulsions
- G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
Definitions
- This invention relates to photographic processes and especially to photographic reversal processes.
- the method of producing a reversed photographic image which comprises exposing to a lighted object or image, for a period not exceeding 0.001 second, with a high intensity light equal in intensity to a gas discharge lamp, a layer of a light-sensitive silver halide emulsion, a test layer of which, when coated on a support and the layer exposed to a light intensity scale for a fixed time between and one second, gives upon full development at 20 C. in the following developer (II):
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (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)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB657742 | 1942-09-01 | ||
| GB402849A GB665682A (en) | 1942-09-01 | 1949-02-14 | Improvements in photographic processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2592298A true US2592298A (en) | 1952-04-08 |
Family
ID=32232342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US141833A Expired - Lifetime US2592298A (en) | 1942-09-01 | 1950-02-01 | Photographic reversal process using high-intensity flash exposure |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2592298A (en)) |
| BE (2) | BE468653A (en)) |
| CH (1) | CH281461A (en)) |
| FR (3) | FR942478A (en)) |
| GB (2) | GB581789A (en)) |
| NL (1) | NL69460C (en)) |
-
0
- BE BE493810D patent/BE493810A/xx unknown
- BE BE468653D patent/BE468653A/xx unknown
- NL NL69460D patent/NL69460C/xx active
-
1942
- 1942-09-01 GB GB6577/44A patent/GB581789A/en not_active Expired
- 1942-09-02 GB GB12423/42A patent/GB581773A/en not_active Expired
-
1946
- 1946-08-28 FR FR942478D patent/FR942478A/fr not_active Expired
-
1947
- 1947-09-08 CH CH281461D patent/CH281461A/fr unknown
-
1949
- 1949-05-27 FR FR58875D patent/FR58875E/fr not_active Expired
-
1950
- 1950-02-01 US US141833A patent/US2592298A/en not_active Expired - Lifetime
- 1950-02-13 FR FR60059D patent/FR60059E/fr not_active Expired
Non-Patent Citations (1)
| Title |
|---|
| None * |
Also Published As
| Publication number | Publication date |
|---|---|
| BE493810A (en)) | |
| BE468653A (en)) | |
| GB581773A (en) | 1946-10-24 |
| GB581789A (en) | 1946-10-24 |
| FR58875E (fr) | 1954-04-06 |
| FR942478A (fr) | 1949-02-09 |
| NL69460C (en)) | |
| FR60059E (fr) | 1954-09-22 |
| CH281461A (fr) | 1952-03-15 |
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