US2192891A - Photographic developer and process of development - Google Patents
Photographic developer and process of development Download PDFInfo
- Publication number
- US2192891A US2192891A US184037A US18403738A US2192891A US 2192891 A US2192891 A US 2192891A US 184037 A US184037 A US 184037A US 18403738 A US18403738 A US 18403738A US 2192891 A US2192891 A US 2192891A
- Authority
- US
- United States
- Prior art keywords
- aminopyridine
- development
- developer
- photographic developer
- halogen
- 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 description 11
- 150000003927 aminopyridines Chemical class 0.000 description 7
- -1 5-iodo-2-amino- 3.5-dichloro-2-aminopyridine hydrochloride Chemical compound 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Inorganic materials [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 3
- 230000000979 retarding effect Effects 0.000 description 3
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical class [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 3
- 150000003930 2-aminopyridines Chemical class 0.000 description 2
- KRTDQDCPEZRVGC-UHFFFAOYSA-N 2-nitro-1h-benzimidazole Chemical compound C1=CC=C2NC([N+](=O)[O-])=NC2=C1 KRTDQDCPEZRVGC-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- HOPRXXXSABQWAV-UHFFFAOYSA-N anhydrous collidine Natural products CC1=CC=NC(C)=C1C HOPRXXXSABQWAV-UHFFFAOYSA-N 0.000 description 2
- UTBIMNXEDGNJFE-UHFFFAOYSA-N collidine Natural products CC1=CC=C(C)C(C)=N1 UTBIMNXEDGNJFE-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 2
- GFYHSKONPJXCDE-UHFFFAOYSA-N sym-collidine Natural products CC1=CN=C(C)C(C)=C1 GFYHSKONPJXCDE-UHFFFAOYSA-N 0.000 description 2
- OCWBGKZFOYMCCN-UHFFFAOYSA-N 3,5-dichloropyridin-2-amine Chemical compound NC1=NC=C(Cl)C=C1Cl OCWBGKZFOYMCCN-UHFFFAOYSA-N 0.000 description 1
- WGOLHUGPTDEKCF-UHFFFAOYSA-N 5-bromopyridin-2-amine Chemical compound NC1=CC=C(Br)C=N1 WGOLHUGPTDEKCF-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- ICSNLGPSRYBMBD-UHFFFAOYSA-N alpha-aminopyridine Natural products NC1=CC=CC=N1 ICSNLGPSRYBMBD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- MCCVKQDZALWIQD-UHFFFAOYSA-N n-(5-chloropyridin-2-yl)acetamide Chemical compound CC(=O)NC1=CC=C(Cl)C=N1 MCCVKQDZALWIQD-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Definitions
- This invention relates to improvements in voperates up to 10 minutes unobjectionably withphotographic developers and processes of deout fogging, whereas a corresponding developer *velopment; 1 withthe addition of collidine after a time of de-'
- a corresponding developer *velopment; 1 withthe addition of collidine after a time of de-'
- collidine after a time of de-'
- For the production of the pleasant blue-black velopment of 10 minutes produces considerable 5 shades of developed silver inphotographic emulfogging, which moreover is produce'd'before the 6 sions, a series of blue-black developing sub end of that period.
- a i 1 stances is known. These substances have, howi In the case of 2.4.6-trimeth'ylpyridine there is ever, certain disadvantages.
- developers according to the invention 30 in solid orliquid form contain the specified sub- Monomethyl-p-aminophenol hydrochloa stance.
- g 2 As particularly suitable substances may be Hydroquinoneuu j 6 mentioned the salts of the halogen-substituted Anhydrous sodium sulphite g 30 2-aminopyr idines, for example 5-iodo-2-amino- Anhydrous sodium carbonate g 30 a pyridine, 5-bromo-2-aminopyridine, 5-chloro-2- Potassium bromide 1 ..g L 0.7 aminopyridine, 5-chloro-2-acetylaminopyridine, Water ccf 1000 354mm?z"ammpyridine and (1) Addition of 0.1 gbor 3.5-dichloro-2-aminopyridine hydrochloride tothis developer base.
- An article of manufacture comprising a photographic developer containing a silver halide developing agent and a halogen-substituted aminopyridine.
- An article of manufacture comprising a photographic developer containing a silver halide developing agent and a 5-halogen-2-amino- Pyridine.
- An article of manufacture comprising a photographic developer containing a silver halide developing agent and 3.5-dichloro-2-aminopyridine.
- An article of manufacture comprising a photographic developer containing a silver halide developing agent and 3.5-dichloro-2-aminopyridine-hydrochloride.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pyridine Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE494468X | 1936-12-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2192891A true US2192891A (en) | 1940-03-12 |
Family
ID=6544720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US184037A Expired - Lifetime US2192891A (en) | 1936-12-21 | 1938-01-08 | Photographic developer and process of development |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2192891A (en:Method) |
| BE (1) | BE425342A (en:Method) |
| FR (1) | FR830985A (en:Method) |
| GB (1) | GB494468A (en:Method) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2465678A (en) * | 1947-03-19 | 1949-03-29 | Donald B Ellig | Machine for sharpening knife blades |
| US2476541A (en) * | 1947-11-18 | 1949-07-19 | Gen Aniline & Film Corp | Process for producing multilayer color negatives containing masking images for colorcorrection purposes |
| US2983605A (en) * | 1955-01-31 | 1961-05-09 | Polaroid Corp | Photographic products, processes, and compositions |
-
0
- BE BE425342D patent/BE425342A/xx unknown
-
1937
- 1937-12-20 FR FR830985D patent/FR830985A/fr not_active Expired
- 1937-12-21 GB GB35430/37A patent/GB494468A/en not_active Expired
-
1938
- 1938-01-08 US US184037A patent/US2192891A/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2465678A (en) * | 1947-03-19 | 1949-03-29 | Donald B Ellig | Machine for sharpening knife blades |
| US2476541A (en) * | 1947-11-18 | 1949-07-19 | Gen Aniline & Film Corp | Process for producing multilayer color negatives containing masking images for colorcorrection purposes |
| US2983605A (en) * | 1955-01-31 | 1961-05-09 | Polaroid Corp | Photographic products, processes, and compositions |
Also Published As
| Publication number | Publication date |
|---|---|
| GB494468A (en) | 1938-10-26 |
| FR830985A (fr) | 1938-08-16 |
| BE425342A (en:Method) |
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