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Expired
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GB1295060A
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Individual
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Individual
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Publication of GB988221ApublicationCriticalpatent/GB988221A/en
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
G03C1/54—Diazonium salts or diazo anhydrides
Landscapes
Chemical & Material Sciences
(AREA)
Engineering & Computer Science
(AREA)
Materials Engineering
(AREA)
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Pyrrole Compounds
(AREA)
Abstract
3 - Diazo - 2,4,5 - triphenyl pyrrole is prepared by adding dilute hydrochloric acid to a mixture of 2,4,5-triphenyl pyrrole and sodium nitrite in acetone and water, and, after standing, making the solution alkaline.
GB1295060A1961-02-081960-04-12Diazotype photocopying composition and process
ExpiredGB988221A
(en)