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
Application number
GB3063036A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IndividualfiledCriticalIndividual
Priority to GB3063036ApriorityCriticalpatent/GB481681A/en
Publication of GB481681ApublicationCriticalpatent/GB481681A/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
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
G03C5/30—Developers
G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
Abstract
Paraphenylenediglycocoll is prepared by digesting p-phenylenediamine with monochloracetic acid in water at 60 DEG C. The hydrochloric acid formed is neutralized with sodium bicarbonate and the diglycocoll crystallized.
GB3063036A1936-11-101936-11-10Improved process of photographic development
ExpiredGB481681A
(en)