GB721639A - Improvements in silver dispersion - Google Patents
Improvements in silver dispersionInfo
- Publication number
- GB721639A GB721639A GB24179/52A GB2417952A GB721639A GB 721639 A GB721639 A GB 721639A GB 24179/52 A GB24179/52 A GB 24179/52A GB 2417952 A GB2417952 A GB 2417952A GB 721639 A GB721639 A GB 721639A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gelatin
- calcium compound
- reducing agent
- water soluble
- silver dispersion
- 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
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
- G03C1/00—Photosensitive materials
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
- G03C1/8255—Silver or silver compounds therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Colloid Chemistry (AREA)
Abstract
A silver salt reducing agent such as hydroquinone is added to a freshly formed mixture of a water soluble silver salt and an alkali metal sulphite in an aqueous solution containing dissolved gelatin and a water soluble calcium compound to make a silver dispersion suitable for the purpose of forming (see Group XX) a blue, neutral or dark-coloured photographic antihalation layer. The calcium compound may be that normally present in gelatin, or if delimed gelatin is used an addition as of calcium acetate is necessary. In absence of the calcium compound, or if addition of the reducing agent is delayed, the ordinary yellow silver dispersion is formed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US248637A US2688601A (en) | 1951-09-27 | 1951-09-27 | Preparation of silver dispersions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB721639A true GB721639A (en) | 1955-01-12 |
Family
ID=22939982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB24179/52A Expired GB721639A (en) | 1951-09-27 | 1952-09-26 | Improvements in silver dispersion |
Country Status (3)
Country | Link |
---|---|
US (1) | US2688601A (en) |
FR (1) | FR1078954A (en) |
GB (1) | GB721639A (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE557693A (en) * | 1956-05-23 | |||
BE562967A (en) * | 1957-02-13 | |||
US3450536A (en) * | 1961-03-24 | 1969-06-17 | Eg & G Inc | Silver halide photographic film having increased exposure-response characteristics |
US3334995A (en) * | 1961-07-31 | 1967-08-08 | Minnesota Mining & Mfg | Process of precipitating silver |
BE630385A (en) * | 1962-03-30 | 1900-01-01 | ||
CH433969A (en) * | 1962-11-29 | 1967-04-15 | Agfa Ag | Panchromatic photographic material |
US3392021A (en) * | 1965-05-25 | 1968-07-09 | Eastman Kodak Co | Photographic anti-halation layers |
US3434839A (en) * | 1965-06-01 | 1969-03-25 | Eastman Kodak Co | Photographic antihalation layers |
BE756067A (en) * | 1969-09-29 | 1971-02-15 | Eastman Kodak Co | ANTI-HALO ENHANCED PHOTOGRAPHIC PRODUCT |
DE2559191C2 (en) * | 1975-12-30 | 1982-11-25 | Agfa-Gevaert Ag, 5090 Leverkusen | Process for the production of silver dispersions for filter and antihalation layers |
US4880727A (en) * | 1986-09-26 | 1989-11-14 | Fuji Photo Film Co., Ltd. | Direct positive photographic material |
JP2777949B2 (en) | 1992-04-03 | 1998-07-23 | 富士写真フイルム株式会社 | Silver halide color photographic materials |
JPH0675343A (en) | 1992-07-06 | 1994-03-18 | Fuji Photo Film Co Ltd | Silver halide color photographic sensitive material and color image forming method |
EP1914594A3 (en) | 2004-01-30 | 2008-07-02 | FUJIFILM Corporation | Silver halide color photographic light-sensitive material and color image-forming method |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2098710A (en) * | 1935-08-16 | 1937-11-09 | Gen Motors Corp | Process of making colloidal lead |
US2406428A (en) * | 1943-07-16 | 1946-08-27 | Augustus R Southworth | Metal containing plastic composition |
US2571688A (en) * | 1946-11-29 | 1951-10-16 | Ilford Ltd | Production of colloidal silver |
US2524357A (en) * | 1947-02-12 | 1950-10-03 | Socony Vacuum Oil Co Inc | Heat-resistant paint |
-
1951
- 1951-09-27 US US248637A patent/US2688601A/en not_active Expired - Lifetime
-
1952
- 1952-09-26 GB GB24179/52A patent/GB721639A/en not_active Expired
- 1952-09-27 FR FR1078954D patent/FR1078954A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2688601A (en) | 1954-09-07 |
FR1078954A (en) | 1954-11-24 |
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