US2346065A - Production of neutral tones in photographic emulsions - Google Patents
Production of neutral tones in photographic emulsions Download PDFInfo
- Publication number
- US2346065A US2346065A US411976A US41197641A US2346065A US 2346065 A US2346065 A US 2346065A US 411976 A US411976 A US 411976A US 41197641 A US41197641 A US 41197641A US 2346065 A US2346065 A US 2346065A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- emulsions
- production
- neutral
- neutral tones
- 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
- 239000000839 emulsion Substances 0.000 title description 30
- 230000007935 neutral effect Effects 0.000 title description 13
- 238000004519 manufacturing process Methods 0.000 title description 6
- 150000001875 compounds Chemical class 0.000 description 9
- UGWULZWUXSCWPX-UHFFFAOYSA-N 2-sulfanylideneimidazolidin-4-one Chemical compound O=C1CNC(=S)N1 UGWULZWUXSCWPX-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000005070 ripening Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- YMOIBWVYBBDZSD-UHFFFAOYSA-N 1,3-diphenyl-2-sulfanylideneimidazolidin-4-one Chemical compound O=C1CN(C=2C=CC=CC=2)C(=S)N1C1=CC=CC=C1 YMOIBWVYBBDZSD-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- -1 silver halide Chemical class 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229910052946 acanthite Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- WJRBRSLFGCUECM-UHFFFAOYSA-N hydantoin Chemical compound O=C1CNC(=O)N1 WJRBRSLFGCUECM-UHFFFAOYSA-N 0.000 description 1
- 229940091173 hydantoin Drugs 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- CBEQRNSPHCCXSH-UHFFFAOYSA-N iodine monobromide Chemical compound IBr CBEQRNSPHCCXSH-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 description 1
- 229940056910 silver sulfide Drugs 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than 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
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/35—Antiplumming agents, i.e. antibronzing agents; Toners
Definitions
- This invention relates to photographic emul- I sions and particularly to a method for the formation of neutral tones in such emulsions.
- a further object is to' provide a method for the production of neutral tones in line grain emulsions.
- a still further object is to I provide novel compounds for producing neutral tones in bromide or bromoiodide emulsions.
- the aryl substituted thiohydantoins used according to our invention may be added to the developer or introduced into the emulsion before the development.
- the introduction of the material into the emulsion may be carried out by adding' it to the emulsion at any stage after the ripening process. Since the compounds are capable of reacting with silver salts to form silver sulfide, they should not be added to the emulsion before or during the ripening process. They may a be added to the emulsion at any subsequent stage in its manufacture such as by mixing a solution of the, agent with the emulsion before coating.
- the amount of arylated thiohydantoin to be added to the emulsion may vary considerably depending upon the composition of the compound and of the emulsion and the degree to'which the tone is to be changed.
- the compound are preferably added to the finished emulsions in small amounts. of the order of milligrams per liter of emulsion containing 40 grams of silver bromide per liter.
- Compounds suitable for use according to our invention include arylated thiohydantoins such as 1-,B-diphenyl-Z-thiohydantoin.
- a gelatin silver bromide emulsion was prepared in a normal manner, as described in the literature, a non-ammonia type being used.
- the emulsion in which the example was obtained was a fine-grain, moderate contrast material of low speed.
- the 1,3-diphenyl-2-thiohydantoin was effective in emulsions of the. type described above, containing somewhat higher iodide content than is frequently used in the preparation of fine grain materials.
- gelatino silver bromide emulsions which comprises ripening the emulsion and adding to it a N-diphenyl-2-thiohydantoin.
- the method for producing neutral tones in sion capable of producing neutral tones on gelatino-silver halide emulsions which comprises development, containing a N-diphenyl-Z-thiohyripening-the emulsion and adding to it 1,3-didantoin added after ripening. phenyl-z-thiohydantoin. 8. A ripened silver halide photographic emul- 6.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Plural Heterocyclic Compounds (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR956678D FR956678A (en:Method) | 1941-09-23 | ||
| US411976A US2346065A (en) | 1941-09-23 | 1941-09-23 | Production of neutral tones in photographic emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US411976A US2346065A (en) | 1941-09-23 | 1941-09-23 | Production of neutral tones in photographic emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2346065A true US2346065A (en) | 1944-04-04 |
Family
ID=23631046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US411976A Expired - Lifetime US2346065A (en) | 1941-09-23 | 1941-09-23 | Production of neutral tones in photographic emulsions |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2346065A (en:Method) |
| FR (1) | FR956678A (en:Method) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2423767A (en) * | 1944-02-03 | 1947-07-08 | Ilford Ltd | Tone-control agents for silver halide emulsions |
| US2432506A (en) * | 1943-11-26 | 1947-12-16 | Ilford Ltd | Treatment of developed silver images with mercapto-tetrazole and triazole compounds |
| US4047953A (en) * | 1975-05-02 | 1977-09-13 | Eastman Kodak Company | Color diffusion transfer employing silver salt transfer reversal and 4-thiohydantoine |
-
0
- FR FR956678D patent/FR956678A/fr not_active Expired
-
1941
- 1941-09-23 US US411976A patent/US2346065A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2432506A (en) * | 1943-11-26 | 1947-12-16 | Ilford Ltd | Treatment of developed silver images with mercapto-tetrazole and triazole compounds |
| US2423767A (en) * | 1944-02-03 | 1947-07-08 | Ilford Ltd | Tone-control agents for silver halide emulsions |
| US4047953A (en) * | 1975-05-02 | 1977-09-13 | Eastman Kodak Company | Color diffusion transfer employing silver salt transfer reversal and 4-thiohydantoine |
Also Published As
| Publication number | Publication date |
|---|---|
| FR956678A (en:Method) | 1950-02-02 |
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