US2000353A - Process of treating photographic layers in a bath containing a wetting agent and new preparations intended for acting on photographic layers - Google Patents
Process of treating photographic layers in a bath containing a wetting agent and new preparations intended for acting on photographic layers Download PDFInfo
- Publication number
- US2000353A US2000353A US506838A US50683831A US2000353A US 2000353 A US2000353 A US 2000353A US 506838 A US506838 A US 506838A US 50683831 A US50683831 A US 50683831A US 2000353 A US2000353 A US 2000353A
- Authority
- US
- United States
- Prior art keywords
- photographic layers
- acting
- wetting agent
- photographic
- bath containing
- 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
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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
- G03C5/3053—Tensio-active agents or sequestering agents, e.g. water-softening or wetting agents
Definitions
- the present invention relates to a process of treating photographic layers in a bath containing a wetting agent and to new preparations intended for acting on photographic layers, the photographic layers being such as contain a silverhalide emulsion.
- the formation of air bubbles and the consequent undesired spots are entirely avoided by introducing the photographic material such, for instance, as the plate, film, paper or the like, before developing it, into a bath containing a small quantity of an organic wetting agent, such as, for instance, pyridine, mcnopol soap i. e. castor oil sulfonic acid, an aromatic sulphonic acid which is alkylated or aralkylated in the nucleus or a salt thereof, or the like.
- an organic wetting agent such as, for instance, pyridine, mcnopol soap i. e. castor oil sulfonic acid, an aromatic sulphonic acid which is alkylated or aralkylated in the nucleus or a salt thereof, or the like.
- the wetting agent may be added directly to the developing bath or to another photographic bath, such, for instance, as a desensitizing bath.
- a developer is prepared from 50 grams of cystallized sodium sulfite, 10 grams of glycine, 50 grams of potassium carbonate, 3 grams of sodium dibutylnaphthalene-a-sulfonate and 200 cc. of water. This developer is to be diluted with 4-5 times its weight of water and the exposed plate, film or the like is developed therein in the usual mannen
- alkylated aromatic compound is intended to include likewise the corresponding aralkylated compounds.
- Photographic developers for silver-halide emulsions containing sodium benzylnaphthalene sulfonate 1.
- Photographic developers for silver-halide emulsions containing a sulfonic acid of an alkylated aromatic hydrocarbon 1.
- Photographic developers for silver-halide emulsions containing an alkali metal salt of a sulfonic acid of an alkylated aromatic hydrocarbon 3.
- Photographic developers for silver-halide emulsions containing sodium dibutyl-naphthalene-a-sulfonate 4.
Description
Patented May 7, 1935 PROCESS OF TREATING PHOTOGRAPHIC LAYERS IN A BATH CONTAINING A WET- TING AGENT AND NEW PREPARATIONS INTENDED FOR ACTING ON PHOTO- GBAPIIIC LAYERS Albert Schaefl'er, Marxlieim in Taunua, Germany,
aasignor to Agfa Anaco Corporation, Binghamton, N. Y., a corporation of New York No Drawing. Application January 5, 1931, Serial No. 506,838. In Germany January 13, 1930 a 8 Claims.
The present invention relates to a process of treating photographic layers in a bath containing a wetting agent and to new preparations intended for acting on photographic layers, the photographic layers being such as contain a silverhalide emulsion.
It is known .that in developing photographic materials, such as plates, films'and papers, undesired bright spots often occur on the layer side of the material (of. Agfa-Photobliitter 1929, page 125). These spots are generally caused by air bubbles which adhere to the layer when the plate, film or paper is brought into the developer and prevent the developer from acting upon the silver bromide covered by the bubbles, and this unattacked silver bromide subsequently dissolves in the fixing bath. Hitherto, this drawback could be avoided only by stroking over the layer side of the photographic material with a piece of wadding directly after the plate or the like was brought into the developer and before any trace of the picture was to be seen. By this inconvenient operation the air bubbles were removed, but often the layer was entirely spoiled by scratchmg.
According to this invention the formation of air bubbles and the consequent undesired spots are entirely avoided by introducing the photographic material such, for instance, as the plate, film, paper or the like, before developing it, into a bath containing a small quantity of an organic wetting agent, such as, for instance, pyridine, mcnopol soap i. e. castor oil sulfonic acid, an aromatic sulphonic acid which is alkylated or aralkylated in the nucleus or a salt thereof, or the like. With the same result the wetting agent may be added directly to the developing bath or to another photographic bath, such, for instance, as a desensitizing bath.
The following examples serve to illustrate the invention, but they are not intended to limit it thereto:
(1) 2 grams of para-aminophenol are dissolved in 100 cc. of water. 6 grams of dry sodium sulphite, 12 grams of potassium carbonate, 0.3 gram of sodium dibutyl-naphthalene-a-sulphonate are dissolved in 200 cc. of water. The solutions are mixedtogether and the plate, film or the like is developed in the mixture as usual at about 18 C.
(2) 300 cc. of a solution of a commercial desensitizing agent are mixed with 1 cc. of pyridine. The plate, film or the like is placed in the solution for.2 minutes in a dark red light and then developed in an orange colored light in one of the 5 usual developers.
(3) 0.5 gram oi monopol soap is added to 300 cc. of water. The exposed plate, film or the like is wetted in the liquid for -l minute and then developed in one of the usual developers.
(4) 1 gram of hydroxy-phenyl-glycine is dissolved in cc. of water which contains 5 grams of crystallized sodium sulfite. 5 grams of potassium carbonate and 0.2 gram of sodium benzylnaphthalene-sulfonate are added to the solution. The film, plate or the like is developed in this solution in the usual manner.
(5) A developer is prepared from 50 grams of cystallized sodium sulfite, 10 grams of glycine, 50 grams of potassium carbonate, 3 grams of sodium dibutylnaphthalene-a-sulfonate and 200 cc. of water. This developer is to be diluted with 4-5 times its weight of water and the exposed plate, film or the like is developed therein in the usual mannen In the following claims, the term alkylated aromatic compound is intended to include likewise the corresponding aralkylated compounds.
I claim:
1. Photographic developers for silver-halide emulsions containing sodium benzylnaphthalene sulfonate.
2. Photographic developers for silver-halide emulsions containing a sulfonic acid of an alkylated aromatic hydrocarbon.
3. Photographic developers for silver-halide emulsions containing an alkali metal salt of a sulfonic acid of an alkylated aromatic hydrocarbon.
4. Photographic developers for silver-halide emulsions containing sodium dibutyl-naphthalene-a-sulfonate.
5. In the process of preparing pictures from photographic silver-halide preparations the modification which consists in efifecting the developing process in the presence of a sulfonic acid of an alkylated aromatic compound.
6. In the process of preparing pictures from photographic silver-halide preparations the modification which consists in eflecting the developing process in the presence of an alkali metal salt of a suitonic acid or an alkylated aromatic 5 compound.
7. In the process of preparing pictures from photographic silver-halide preparations the modification which consists in eflecting the developing process in the presence 01 sodium dibutyl-naphthalene-a-sultonate.
8. In the process of preparing pictures from photographic silver-halide preparations the modification which consists in effecting the developing process in the presence of sodium benzylnaphthalene sulfonate.
ALBERT SCHAEFFER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE552434T | 1930-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2000353A true US2000353A (en) | 1935-05-07 |
Family
ID=34484623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US506838A Expired - Lifetime US2000353A (en) | 1930-01-14 | 1931-01-05 | Process of treating photographic layers in a bath containing a wetting agent and new preparations intended for acting on photographic layers |
Country Status (3)
Country | Link |
---|---|
US (1) | US2000353A (en) |
DE (1) | DE552434C (en) |
GB (1) | GB365317A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2428208A (en) * | 1945-06-20 | 1947-09-30 | Eastman Kodak Co | Dichromate bleach bath containing a wetting agent and method of bleaching therewith |
US2494765A (en) * | 1944-11-10 | 1950-01-17 | Keuffel & Esser Co | Chemical erasing of photographic silver images |
US2578075A (en) * | 1949-06-18 | 1951-12-11 | Keuffel & Esser Co | Brownprint fixing composition containing alkali thiosulfate, alkali oxalate, and a surface active wetting agent |
US2618558A (en) * | 1949-04-12 | 1952-11-18 | Eastman Kodak Co | Photographic developers comprising an n,n - dialkyl-p-phenylenediamine and a benzenesulfonate |
US2663641A (en) * | 1946-10-07 | 1953-12-22 | Gevaert Photo Prod Nv | Production of reversal images |
US2860977A (en) * | 1953-08-26 | 1958-11-18 | Eastman Kodak Co | Photographic foam processing |
US3157502A (en) * | 1958-10-11 | 1964-11-17 | Philips Corp | Stabilized physical developers containing ionogenic surfactants |
US4778748A (en) * | 1984-07-13 | 1988-10-18 | Konishiroku Photo Industries, Co., Ltd. | Method for processing light-sensitive silver halide color photographic material |
DE3938573A1 (en) * | 1989-11-21 | 1991-05-23 | Du Pont Deutschland | METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS |
US5215873A (en) * | 1989-11-21 | 1993-06-01 | E. I. Du Pont De Nemours And Company | Process for developing silver halide recording materials |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL232192A (en) * | 1958-10-11 |
-
1930
- 1930-01-14 DE DE1930552434D patent/DE552434C/en not_active Expired
-
1931
- 1931-01-05 US US506838A patent/US2000353A/en not_active Expired - Lifetime
- 1931-01-13 GB GB1173/31A patent/GB365317A/en not_active Expired
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2494765A (en) * | 1944-11-10 | 1950-01-17 | Keuffel & Esser Co | Chemical erasing of photographic silver images |
US2428208A (en) * | 1945-06-20 | 1947-09-30 | Eastman Kodak Co | Dichromate bleach bath containing a wetting agent and method of bleaching therewith |
US2663641A (en) * | 1946-10-07 | 1953-12-22 | Gevaert Photo Prod Nv | Production of reversal images |
US2618558A (en) * | 1949-04-12 | 1952-11-18 | Eastman Kodak Co | Photographic developers comprising an n,n - dialkyl-p-phenylenediamine and a benzenesulfonate |
US2578075A (en) * | 1949-06-18 | 1951-12-11 | Keuffel & Esser Co | Brownprint fixing composition containing alkali thiosulfate, alkali oxalate, and a surface active wetting agent |
US2860977A (en) * | 1953-08-26 | 1958-11-18 | Eastman Kodak Co | Photographic foam processing |
US3157502A (en) * | 1958-10-11 | 1964-11-17 | Philips Corp | Stabilized physical developers containing ionogenic surfactants |
US4778748A (en) * | 1984-07-13 | 1988-10-18 | Konishiroku Photo Industries, Co., Ltd. | Method for processing light-sensitive silver halide color photographic material |
DE3938573A1 (en) * | 1989-11-21 | 1991-05-23 | Du Pont Deutschland | METHOD FOR DEVELOPING PHOTOGRAPHIC SILVER HALOGENIDE RECORDING MATERIALS |
EP0429973A1 (en) * | 1989-11-21 | 1991-06-05 | Du Pont De Nemours (Deutschland) Gmbh | Method for developing photographic silver halide recording materials |
US5215873A (en) * | 1989-11-21 | 1993-06-01 | E. I. Du Pont De Nemours And Company | Process for developing silver halide recording materials |
Also Published As
Publication number | Publication date |
---|---|
DE552434C (en) | 1932-06-13 |
GB365317A (en) | 1932-01-21 |
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