GB629656A - Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor - Google Patents
Process for positive diazo-type and negative metal reproduction images and light-sensitive material thereforInfo
- Publication number
- GB629656A GB629656A GB2745446A GB2745446A GB629656A GB 629656 A GB629656 A GB 629656A GB 2745446 A GB2745446 A GB 2745446A GB 2745446 A GB2745446 A GB 2745446A GB 629656 A GB629656 A GB 629656A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- amino
- hydroxy
- acid
- diazo
- 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
- G03C1/52—Compositions containing diazo compounds as photosensitive substances
- G03C1/62—Metal compounds reducible to metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
629,656. Photographic diazotype processes. FAIRWEATHER, H. G. C. (General Aniline & Film Corporation). Sept. 12, 1946, No. 27454. [Class 98 (ii)] A light-sensitive diazotype layer comprises a diazo compound capable of decomposing under the action of actinic light to produce a reducing agent, a coupling component which will form with the diazo compound an azo dye having high ultraviolet transmission characteristics, and a reducible non-light-sensitive salt of silver, mercury or thallium, the diazo compound being in such form that it will not react to convert the salt to a light-sensitive form. On exposure of this layer to ultra-violet light under a negative pattern and development with ammonia, an azo dye is produced in the parts protected from light and a metallic deposit in the parts exposed to the light, and the print as made is used as a transition print for production of positives on ordinary diazotype layers by exposure with ultra-violet light and ammonia development; thus a number of positives can be made from a negative without the necessity of wet-developing, washing or fixing operations. A list of diazo compounds which may be used includes 4-amino-N-ethyl- 1 - cyclohexylaminobenzene, 2.5 - diethoxy - 4 - phenylmercaptoacetylamino - 1 - aminobenzene, 4.4<SP>1</SP>-diamino-2.2<SP>1</SP>-5.5<SP>1</SP>-tetraethoxy triphenylmethane, N -benzene 1.2.3.4 - tetrahydroxy - 6 - aminoquinoline, 5 - amino - 2-methyl -N benzyl - 2.3-dihydroindole, 6 - amino - 9 - ethylhexahydro - carbazole, N-p-(aminophenyl)-morpholine, N- p - aminophenyl piperidine, N - ethyl - N - (4 - amino - 3 - methyl phenyl) - glycineamide, and 1-(p-aminophenyl)-pyrrolidene. Coupling components include 2.3-dihydroxynaphthalene, 1- amino - 8 -hydroxy - 3.6 -naphthalene disulphonic acid, 6-hydroxy naphthimidazole, R-salt, 2.3- dihydroxynaphthalene - 6 - sulphonic acid, H- acid, 2.4-dihydroxybenzaldehyde and dimethyldihydroresorcinol. Of the metal salts, silver, mercurous and thallous nitrates and sulphamates are particularly suitable. Paper, cellulose acetate foil or gelatin coated cellulose acetate foil may be used as ultra-violet light transmissive support for the layers. In eight examples the diazo compounds used are the fluoboric acid salts of diazotized p-aminodiethylaniline, p-amino-N.N-diethyl-metatoluidine or p-amino-diphenylamine; the coupling components 2.3 - dihydroxynaphthalene, 1- amino - 8 -hydroxy- 3.6-dihydroxynapbthalene, or 6-hydroxy-naphthimidazole; and the metal salts silver nitrate or sulphamate: these substances being added in various specified proportions, together with citric acid, to form the necessary coating solutions. Specification 391,677 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2745446A GB629656A (en) | 1946-09-12 | 1946-09-12 | Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2745446A GB629656A (en) | 1946-09-12 | 1946-09-12 | Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB629656A true GB629656A (en) | 1949-09-26 |
Family
ID=10259846
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2745446A Expired GB629656A (en) | 1946-09-12 | 1946-09-12 | Process for positive diazo-type and negative metal reproduction images and light-sensitive material therefor |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB629656A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2750292A (en) * | 1950-05-26 | 1956-06-12 | Hartford Nat Bank & Trust Co | Process for producing colored photographic contrasts |
US3007795A (en) * | 1955-02-11 | 1961-11-07 | Agfa Ag | Process for the production of laterally non-reversed positive copies by heat development |
US3081166A (en) * | 1957-02-05 | 1963-03-12 | Grinten Chem L V D | Process for making positive diazotype copies by exposure to light of a mercury vaporlamp and light-sensitive material suited for this process |
-
1946
- 1946-09-12 GB GB2745446A patent/GB629656A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2750292A (en) * | 1950-05-26 | 1956-06-12 | Hartford Nat Bank & Trust Co | Process for producing colored photographic contrasts |
US3007795A (en) * | 1955-02-11 | 1961-11-07 | Agfa Ag | Process for the production of laterally non-reversed positive copies by heat development |
US3081166A (en) * | 1957-02-05 | 1963-03-12 | Grinten Chem L V D | Process for making positive diazotype copies by exposure to light of a mercury vaporlamp and light-sensitive material suited for this process |
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