US2311428A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2311428A US2311428A US307866A US30786639A US2311428A US 2311428 A US2311428 A US 2311428A US 307866 A US307866 A US 307866A US 30786639 A US30786639 A US 30786639A US 2311428 A US2311428 A US 2311428A
- Authority
- US
- United States
- Prior art keywords
- developing
- piperazine
- photographic developer
- alkyl
- soluble
- 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
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
- the invention comprises the features hereinafter fully described, and particu larly pointed out in the claims, the following description setting forth in. detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various. ways in which the principle of the invention may be employed.
- a developing composition is made. up to include piperazine and a silver halide developing agent.
- the piperazine may be in convenient or desired form, either anhydrous or crystalline, the latter form being more generally preferable on account of its very ready solubility, and I especially prefer Piperazine hexahydrate grams 10 Paraphenylenediamine --do 16 Glycine do Sodium sulphite do 90 Potassium bromide do 0.33 Water Y liters 1.2
- the developing is carried out at customary developing temperature, usually around 70 or -75 E, but the composition is not critical as to temperature.
- present compounds are particularly advantageous with one or more of the aminohydroxy compounds described in my co-pendlng application Serial No. 307,865, viz. an alkyl substituted amino-hydroxy aliphatic compound sufliciently soluble for working. concentratiomf Presence of a sulphite radical is also desirable.
- R an aliphatic amino compound of the general formula R -c-cmon in which R is an alkyl radical and R is an alkyl which optionally may have a hydroxyl suiliciently soluble for working concentration, a compound providing a sulphite radical, and a silver halide developing agent of fine grain type.
- a photographic developer oontaininlv p n azine 0.5 to 5.0'per cent snd'a-silvershalide devei opingcgent.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Patented Feb; 16, i943 PATENT OFFICE r'no'rocmrmc nn'vnmrnn William H. Wood, Bcdford, Ohio, assignor to 'Han'is-Scybold-Potter a Company,
Cleveland,
Ohio, a corporation of Ohio No Drawing. Application December 6, 1939, Serial No. 307,863
Claims. =(c1. 95-48) g This invention relates to photography, and more particularly developers; and it is among the objects of the invention to improve developing procedure and compositions, and more particularly facilitate development of the so-called fine grain" character.
To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described, and particu larly pointed out in the claims, the following description setting forth in. detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various. ways in which the principle of the invention may be employed.
In accordance with my invention, a developing composition is made. up to include piperazine and a silver halide developing agent. The piperazine may be in convenient or desired form, either anhydrous or crystalline, the latter form being more generally preferable on account of its very ready solubility, and I especially prefer Piperazine hexahydrate grams 10 Paraphenylenediamine --do 16 Glycine do Sodium sulphite do 90 Potassium bromide do 0.33 Water Y liters 1.2
The developing is carried out at customary developing temperature, usually around 70 or -75 E, but the composition is not critical as to temperature.
Also the present compounds'are particularly advantageous with one or more of the aminohydroxy compounds described in my co-pendlng application Serial No. 307,865, viz. an alkyl substituted amino-hydroxy aliphatic compound sufliciently soluble for working. concentratiomf Presence of a sulphite radical is also desirable.
As an illustrative example, the following is given:
Piperazine hexahydrate grams l0 Paraphenylenediamine do 16 Glycine do 15 Sodium sulphite do 90 Trimethylolaminomethane do 2.5 Potassium bromide do 0.3 Water liters 1.2
Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims,
or the equivalent of such, be employed.
- glycine, paraphenylenediamine, sodium sulphite .tinctly claim as my invention:
I therefore particularly point out and disl. In preparing photographic images, developing the image in the presence of piperazine,
and potassium bromide.
2. In preparing photographic images, developing the image in the presence of piperazine,
an aliphatic amino compound of the general formula R -c-cmon in which R is an alkyl radical and R is an alkyl which optionally may have a hydroxyl suiliciently soluble for working concentration, a compound providing a sulphite radical, and a silver halide developing agent of fine grain type.
3. In preparing photographic images, developing the image ln the presence ,of piperazine,
an aliphatic amino compound of the general formula lv-c-cnlon l IHr in which R'is an alkyl radical and R is an alkyl which optionally may have a hydroxyl suiilciently soluble for working concentration, and a silver halide developing agent.
4. In preparing photographic images, developing the image in the presence of piperazine which optionally may have a hydroxyl sumclently soluble for working concentration, a. compound providing a aulphite radic'el, and a silver halide developing agent of fine grain ty-pe.
per a'mm silver halide developing:
devel-' sodium- 8. A photographic developer containing piperazine; an aliphatic amino compound d the general" formula in which R is-an'alkyl'mdical and R" is an alkyl which optionally may have a hydroxyl sumcientiy soluble for working concentration; and a silver-1 halide developin a ent;
9. A hotographic "developer-containing iper- .l azine 0.5 to 51) percent and; silver halidedevel opihgsagent of nnegrain t'ype; V
10. A photographic developer oontaininlv p n azine 0.5 to 5.0'per cent snd'a-silvershalide devei opingcgent.
WILLEIAM H. WOOD.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US307866A US2311428A (en) | 1939-12-06 | 1939-12-06 | Photographic developer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US307866A US2311428A (en) | 1939-12-06 | 1939-12-06 | Photographic developer |
Publications (1)
Publication Number | Publication Date |
---|---|
US2311428A true US2311428A (en) | 1943-02-16 |
Family
ID=23191506
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US307866A Expired - Lifetime US2311428A (en) | 1939-12-06 | 1939-12-06 | Photographic developer |
Country Status (1)
Country | Link |
---|---|
US (1) | US2311428A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466423A (en) * | 1945-05-11 | 1949-04-05 | Eastman Kodak Co | Fine-grain developers |
US4075014A (en) * | 1973-03-17 | 1978-02-21 | Tetenal Photowerk Walter Grabig | Color picture development process |
US4170478A (en) * | 1977-06-06 | 1979-10-09 | Eastman Kodak Company | Photographic color developer compositions |
US4186004A (en) * | 1976-10-15 | 1980-01-29 | Eastman Kodak Company | Process of formation of color images, photographic product and treatment solutions useful therein |
US4273863A (en) * | 1977-09-29 | 1981-06-16 | Eastman Kodak Company | Process of formation of color images, photographic product and treating solutions useful for putting the process into practice |
US5821040A (en) * | 1995-06-21 | 1998-10-13 | Fuji Photo Film Co., Ltd. | Method for developing silver haide photographic material |
US5821041A (en) * | 1996-03-05 | 1998-10-13 | Fuji Photo Film Co., Ltd. | Liquid developer for photographic silver halide photosensitive material and development method |
-
1939
- 1939-12-06 US US307866A patent/US2311428A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466423A (en) * | 1945-05-11 | 1949-04-05 | Eastman Kodak Co | Fine-grain developers |
US4075014A (en) * | 1973-03-17 | 1978-02-21 | Tetenal Photowerk Walter Grabig | Color picture development process |
US4186004A (en) * | 1976-10-15 | 1980-01-29 | Eastman Kodak Company | Process of formation of color images, photographic product and treatment solutions useful therein |
US4170478A (en) * | 1977-06-06 | 1979-10-09 | Eastman Kodak Company | Photographic color developer compositions |
US4273863A (en) * | 1977-09-29 | 1981-06-16 | Eastman Kodak Company | Process of formation of color images, photographic product and treating solutions useful for putting the process into practice |
US5821040A (en) * | 1995-06-21 | 1998-10-13 | Fuji Photo Film Co., Ltd. | Method for developing silver haide photographic material |
US5821041A (en) * | 1996-03-05 | 1998-10-13 | Fuji Photo Film Co., Ltd. | Liquid developer for photographic silver halide photosensitive material and development method |
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