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.)
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.)
Philip A Hunt Chemical Corp
Original Assignee
Philip A Hunt Chemical Corp
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 Philip A Hunt Chemical CorpfiledCriticalPhilip A Hunt Chemical Corp
Priority to FR7203131ApriorityCriticalpatent/FR2169743A1/fr
Publication of FR2169743A1publicationCriticalpatent/FR2169743A1/fr
Application grantedgrantedCritical
Publication of FR2169743B1publicationCriticalpatent/FR2169743B1/fr
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
Landscapes
Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
Silver Salt Photography Or Processing Solution Therefor
(AREA)
FR7203131A1972-01-311972-01-31Developer preservatives - quaternary ammonium sulphite cpds not giving side reactions eg with hardeners,nor making concentra
GrantedFR2169743A1
(en)