US1850162A - Fixing bleaching-out pictures - Google Patents
Fixing bleaching-out pictures Download PDFInfo
- Publication number
- US1850162A US1850162A US447420A US44742030A US1850162A US 1850162 A US1850162 A US 1850162A US 447420 A US447420 A US 447420A US 44742030 A US44742030 A US 44742030A US 1850162 A US1850162 A US 1850162A
- Authority
- US
- United States
- Prior art keywords
- bleaching
- sensitizer
- fixing
- fixing bleaching
- out pictures
- 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 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- 239000000975 dye Substances 0.000 description 4
- 150000003585 thioureas Chemical class 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 2
- HTKFORQRBXIQHD-UHFFFAOYSA-N allylthiourea Chemical compound NC(=S)NCC=C HTKFORQRBXIQHD-UHFFFAOYSA-N 0.000 description 2
- 229960001748 allylthiourea Drugs 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 2
- 241001479434 Agfa Species 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- -1 for instance Substances 0.000 description 1
- 230000000266 injurious effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000243 solution 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
- G03C7/02—Direct bleach-out processes; Materials therefor; Preparing or processing such materials
Definitions
- Our present invention relates to a process 5 dimin shed by removing the sensitizer from the picture. This operation has, however,
- sulfurous acid for fixing such bleaching-out layers sulfurous acid is used with good result. It acts upon the derivative of thiourea serving as sensitizer without'exerting any injurious influence on the dye.
- the sulfurous acid may be used either in aqueous solution or dissolved in an organic solvent.
- the solvent selected for this purpose must be one which does not act upon the binding agent in the layer to be fixed in each of bleaching out dyes constituting the picture a mechanical way or by means of an indifferent liquid, for instance, benzene.
- the invention is not limited to the foregoing example or to the specific details given therein.
- a solution of sulfurous acid in a suitable solvent evolving gaseous sulfur dioxide may be used.
- the unfixed icture may be treated in a bath containing in the case of nitrocellulose used as a binding agent for the dye a mixture of benezene and methyl alcoholin the ratio 4: 1 and sulfurous acid in a quantity up to saturation.
- the fixing process is finished in about 20 minutes.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Adhesive Tapes (AREA)
- Detergent Compositions (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI0038035 | 1929-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1850162A true US1850162A (en) | 1932-03-22 |
Family
ID=7189676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US447420A Expired - Lifetime US1850162A (en) | 1929-05-11 | 1930-04-25 | Fixing bleaching-out pictures |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1850162A (enrdf_load_stackoverflow) |
| FR (1) | FR695364A (enrdf_load_stackoverflow) |
| GB (1) | GB341371A (enrdf_load_stackoverflow) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2437412A (en) * | 1944-11-08 | 1948-03-09 | Eastman Kodak Co | Latent image intensification with sulfur dioxide |
| US3285744A (en) * | 1963-04-04 | 1966-11-15 | Horizons Inc | Photography |
| US3892569A (en) * | 1972-12-04 | 1975-07-01 | Gen Film Dev Corp | Photosensitive sheets comprising organic dyes and sensitizers |
-
1930
- 1930-04-25 US US447420A patent/US1850162A/en not_active Expired - Lifetime
- 1930-05-09 FR FR695364D patent/FR695364A/fr not_active Expired
- 1930-05-12 GB GB14568/30A patent/GB341371A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2437412A (en) * | 1944-11-08 | 1948-03-09 | Eastman Kodak Co | Latent image intensification with sulfur dioxide |
| US3285744A (en) * | 1963-04-04 | 1966-11-15 | Horizons Inc | Photography |
| US3892569A (en) * | 1972-12-04 | 1975-07-01 | Gen Film Dev Corp | Photosensitive sheets comprising organic dyes and sensitizers |
Also Published As
| Publication number | Publication date |
|---|---|
| GB341371A (enrdf_load_stackoverflow) | 1931-01-15 |
| FR695364A (fr) | 1930-12-16 |
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