US2017167A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2017167A US2017167A US737958A US73795834A US2017167A US 2017167 A US2017167 A US 2017167A US 737958 A US737958 A US 737958A US 73795834 A US73795834 A US 73795834A US 2017167 A US2017167 A US 2017167A
- Authority
- US
- United States
- Prior art keywords
- sodium
- triethanolamine
- developer
- salt
- alkali
- 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
Definitions
- This invention relates to photographic de- Bath No.2 I velopers, and more particularly to developers in Sodium sumte 10 grams 3 1 3 ifi m replaced a Sodium salt or triethanolamine 50''. do.
- Alkaline developers have been known and used water to H H e 1 mar 6 for many years. These developers usually con- The film 01' Plate first immersed in Bath N tain developing agents, a so-called preservative, 2 t0 3 minutes n then in Bath N 2 until such as sodium sulfite, and an alkali, such as v pm i mpl sodium or potassium carbonate, or sodium or EXAM-91,33
- sqdium Salt is to provide developers containing a milder al- Pmassmm bromide 5 9- 15 kali. Another.
- object is to provide developers Piltassium' Mme which will givesatisfactory results without the water r-" 1 liter objectionable features of those containing the 1 LE 4 alkalies previously used, such as the formation El I 5 of gas blisters when a film developed in a deum 10 s 20 veloper containing carbonate is immersed in an Hy one ""7 fixing th 4 I have discovered by using a Sodium Of triethah0 1amine go.
- a photographic developer comprising a deis: veloping agent and an alkali, at least 25%, ap- 1.
- a photographic developer comprising a deproximately, of the alkali consisting of an alkali veloping agent and, as an essential alkaline-remetal salt of triethanolamine.
- a photographic developer comprising a de- 5 metal salt. of triethanoiamine. veioping agent and an alkali, at least 25%, ap-
- a photographic developer comprising a deproximately, of the alkali consisting of a sodium veloping agent and, as an essential alkaline-resalt of triethanolamine. acting. component of the developer, a sodium salt 10 01 triethanolamine.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Description
Patented Oct. o I
UNITED STATES PA-TENT OFFICE rnorocimrmc nnvnnorsa Harold DQBussell, Rochester, N. Y., asiignor to Eastman Kodak Company, Rochester, N. Y., a
corporation of New York No Drawing. Application August 1,1934, Serial No. 137,958
4 Claims. (01. 95-88) I This invention relates to photographic de- Bath No.2 I velopers, and more particularly to developers in Sodium sumte 10 grams 3 1 3 ifi m replaced a Sodium salt or triethanolamine 50''. do.
5 Alkaline developers have been known and used water to H H e 1 mar 6 for many years. These developers usually con- The film 01' Plate first immersed in Bath N tain developing agents, a so-called preservative, 2 t0 3 minutes n then in Bath N 2 until such as sodium sulfite, and an alkali, such as v pm i mpl sodium or potassium carbonate, or sodium or EXAM-91,33
10 potassium hydroxide. In recent years various p 10 sensitive materials and photographic processes E1011 5 have appeared with which the use of these relanydrpqumone 10 tively strong alkalies is objectionable for one sodium sumte: 75 reason or another. One object of this invention sqdium Salt is to provide developers containing a milder al- Pmassmm bromide 5 9- 15 kali. Another. object is to provide developers Piltassium' Mme which will givesatisfactory results without the water r-" 1 liter objectionable features of those containing the 1 LE 4 alkalies previously used, such as the formation El I 5 of gas blisters when a film developed in a deum 10 s 20 veloper containing carbonate is immersed in an Hy one ""7 fixing th 4 I have discovered by using a Sodium Of triethah0 1amine go. of triethanolamine as the alkaline component, 5:22:33 :Jggg '7 o 01 g-v 2- I a a ggg' g e a be p ed w h ulfi all these, water to make 1 um The odi m slalts f h lam may be The above exampies'show the sodium salt of I P p y; dissolving powdered Sodium triethanolamine as the sole alkaline component droxide in triethanolamine, with heating. The of the developer. I have found. however, that amount of sodium hydroxide used is one, two or mixtures of di salt of trie'thanolamine 30 three eqmvalent Weights, depending upon Wham with other alkalies are advantageous for some er the mono-, dior tri-sodium salt of triethapurposes, r example, I ma'y'use a'mixture of nolamine is desired. The three salts, or mixtures caustic soda, bo x, -1 a, sodium salt of, tr ither f. m y be d interchangeflbly in (level-1 ethanolamine. Or I may us'e a mixture of sodmrmulseium metaborate' and a sodium salt of triethanol- 35 suitable developer formula! embodying 5 1 amine. Following is an example of a developer vention are given here, by way of example. in which such a mu at alkaues is used EXAMPLE 1 EXAMPLE 5 40 40 Hydroquinone 10 grams Elm 2 grams Sodium sulflte 10 do, 5 Potassium bromide; 5 do. Sodium sulfite sodium salt of triethanolamine so do. Sodium metabomte-e e water to make 1 -Sodium salt of triethanolamine 10 do. 45
Potassium bromide 2 do. I mm 2 Water to make 1 liter Two.B FQ'BMU'LA will be understood I am not to be Bath 1 by the above examples except as indicated in the appended claims. 50
Eion 5 grams While I have spoken of the sodium salts oi. Hydroq e 10 do. triethanolamine, it will be apparent that I may Sodium sulflte 100 do. also use the potassium or other alkali metal Sodium bisulfite 5 do. salts of .triethanolamine.
- Water to make 1 liter What .I claim as my invention and desire to 55 be secured by Letters Patent of the United States 3. A photographic developer comprising a deis: veloping agent and an alkali, at least 25%, ap- 1. A photographic developer comprising a deproximately, of the alkali consisting of an alkali veloping agent and, as an essential alkaline-remetal salt of triethanolamine.
5 acting component of the developer, an alkali 4. A photographic developer comprising a de- 5 metal salt. of triethanoiamine. veioping agent and an alkali, at least 25%, ap-
2. A photographic developer comprising a deproximately, of the alkali consisting of a sodium veloping agent and, as an essential alkaline-resalt of triethanolamine. acting. component of the developer, a sodium salt 10 01 triethanolamine. HAROLD D. RUSSELL. 1o
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US737958A US2017167A (en) | 1934-08-01 | 1934-08-01 | Photographic developer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US737958A US2017167A (en) | 1934-08-01 | 1934-08-01 | Photographic developer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2017167A true US2017167A (en) | 1935-10-15 |
Family
ID=24965979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US737958A Expired - Lifetime US2017167A (en) | 1934-08-01 | 1934-08-01 | Photographic developer |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2017167A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444803A (en) * | 1945-08-27 | 1948-07-06 | Eastman Kodak Co | Photographic developer containing disodium salts of monohydric phenol monoacids |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| US3394005A (en) * | 1964-10-16 | 1968-07-23 | Du Pont | Increased development rate of photosoluble silver halide emulsions by the action of water-soluble iodide |
| US5340705A (en) * | 1989-05-18 | 1994-08-23 | Agfa-Gevaert, N.V. | Processing liquid for use in silver complex diffusion transfer processing |
-
1934
- 1934-08-01 US US737958A patent/US2017167A/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444803A (en) * | 1945-08-27 | 1948-07-06 | Eastman Kodak Co | Photographic developer containing disodium salts of monohydric phenol monoacids |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| US3394005A (en) * | 1964-10-16 | 1968-07-23 | Du Pont | Increased development rate of photosoluble silver halide emulsions by the action of water-soluble iodide |
| US5340705A (en) * | 1989-05-18 | 1994-08-23 | Agfa-Gevaert, N.V. | Processing liquid for use in silver complex diffusion transfer processing |
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