US2060595A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2060595A US2060595A US20985A US2098535A US2060595A US 2060595 A US2060595 A US 2060595A US 20985 A US20985 A US 20985A US 2098535 A US2098535 A US 2098535A US 2060595 A US2060595 A US 2060595A
- Authority
- US
- United States
- Prior art keywords
- photographic developer
- group
- methylaminophenol
- gram
- developing
- 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
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 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 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- JWDYCNIAQWPBHD-UHFFFAOYSA-N 1-(2-methylphenyl)glycerol Chemical compound CC1=CC=CC=C1OCC(O)CO JWDYCNIAQWPBHD-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-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
- 239000003513 alkali Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- JHKKTXXMAQLGJB-UHFFFAOYSA-N 2-(methylamino)phenol Chemical compound CNC1=CC=CC=C1O JHKKTXXMAQLGJB-UHFFFAOYSA-N 0.000 description 1
- JPVRYZKONHXUBJ-UHFFFAOYSA-N 4-methyl-2-(methylamino)phenol Chemical compound CNC1=CC(C)=CC=C1O JPVRYZKONHXUBJ-UHFFFAOYSA-N 0.000 description 1
- CVUSWMUQVRSJEE-UHFFFAOYSA-N S(=O)(=O)(OC)OC.CC=1OC2=C(N1)C=CC=C2 Chemical class S(=O)(=O)(OC)OC.CC=1OC2=C(N1)C=CC=C2 CVUSWMUQVRSJEE-UHFFFAOYSA-N 0.000 description 1
- 125000000218 acetic acid group Chemical group C(C)(=O)* 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 238000007127 saponification reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 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
- G03C5/30—Developers
- G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
Definitions
- Our present invention relates to a photographic developer.
- One of its objects is a new photographic developer. Another object is a photographic developer which can be used without alkali. Further objects will be seen from the detailed specification following hereafter.
- 2-methylaminopheno1 is a known photographic developing agent. This substance, when compared with Metol and other rapid developing agents, has only a moderate capacity for developing and yields flat pictures lacking clearness. Consequently 2-methylaminophenol has been brought into the trade in admixture with other developing agents of more energetic action, for instance in admixture with hydroquinone under the name Ortol.
- This invention relates to a photographic developer having a considerably enhanced developing capacity as compared with ortol owing to the presence of Z-methylaminophenol in which an alkyl-group, a hydroXy-group or an alkoxy group such as a methoxy group has been introduced as a substituent in the nucleus.
- These substitution products resemble Metol in their behavior, some representatives of the group surpassing it, however, in many properties, particularly in respect of preventing fog.
- the alkoxy-derivatives the reducing capacity is so much enhanced that development without alkali is possible.
- These bodies can be made from substituted 2-methylbenzoxazole-dimethyl sulfates by decomposition with caustic soda lye and saponification of the acetyl product thus obtained by means of hydrochloric acid.
- Example 1 200 cc. of Water 1 gram of 4-methyl-2-methylaminophenol 5 grams of sodium sulfite (anhydrous) 10 grams of potassium carbonate 0.2 gram of potassium bromide.
- Example 2 200 cc. of water 1 gram of 5-methoxy-Z-methylaminophenol 5 grams of sodium sulfite (anhydrous) 0.2 gram of potassium bromide.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Description
Patented Nov. 10, 1936 UNITED STATES PATENT OFFICE PHOTOGRAPHIC DEVELOPER No Drawing. Application May 11, 1935, Serial No. 20,985. In Germany May 19, 1934 2 Claims.
Our present invention relates to a photographic developer.
One of its objects is a new photographic developer. Another object is a photographic developer which can be used without alkali. Further objects will be seen from the detailed specification following hereafter.
2-methylaminopheno1 is a known photographic developing agent. This substance, when compared with Metol and other rapid developing agents, has only a moderate capacity for developing and yields flat pictures lacking clearness. Consequently 2-methylaminophenol has been brought into the trade in admixture with other developing agents of more energetic action, for instance in admixture with hydroquinone under the name Ortol.
This invention relates to a photographic developer having a considerably enhanced developing capacity as compared with ortol owing to the presence of Z-methylaminophenol in which an alkyl-group, a hydroXy-group or an alkoxy group such as a methoxy group has been introduced as a substituent in the nucleus. These substitution products resemble Metol in their behavior, some representatives of the group surpassing it, however, in many properties, particularly in respect of preventing fog. In the case of the alkoxy-derivatives the reducing capacity is so much enhanced that development without alkali is possible. These bodies can be made from substituted 2-methylbenzoxazole-dimethyl sulfates by decomposition with caustic soda lye and saponification of the acetyl product thus obtained by means of hydrochloric acid.
The following are examples of suitable developers which surpass Metol in respect of the production of pictures free from fog:
Example 1 200 cc. of Water 1 gram of 4-methyl-2-methylaminophenol 5 grams of sodium sulfite (anhydrous) 10 grams of potassium carbonate 0.2 gram of potassium bromide.
Example 2 200 cc. of water 1 gram of 5-methoxy-Z-methylaminophenol 5 grams of sodium sulfite (anhydrous) 0.2 gram of potassium bromide.
What we claim is:
WILHELM SCHNEIDER. GUSTAV WILMANNS.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2060595X | 1934-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2060595A true US2060595A (en) | 1936-11-10 |
Family
ID=7983079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US20985A Expired - Lifetime US2060595A (en) | 1934-05-19 | 1935-05-11 | Photographic developer |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2060595A (en) |
| FR (1) | FR789640A (en) |
-
1935
- 1935-05-06 FR FR789640D patent/FR789640A/en not_active Expired
- 1935-05-11 US US20985A patent/US2060595A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR789640A (en) | 1935-11-04 |
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