http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-898328-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9799ffcda2dbb45041a5ab0fd08dd5fe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-383 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-38 |
| filingDate | 1958-09-26^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1962-06-06^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-898328-A |
| titleOfInvention | Improvements in photographic processing baths |
| abstract | 898,328. Photographic developing and stabilizing compositions. KODAK Ltd. Sept. 26, 1958 [Sept. 30, 1957], No. 30769/58. Class 98(2). A photographic developing composition producing stable silver images without fixing and washing, especially for print-out and direct positive materials, comprises an aqueous alkaline solution of a hydroxylamine or a 3-pyrazolidone developing agent and one of the compounds monothioglycerol, thioglycol, B-mercaptoethylamine, N: N-diethyl-B-mercaptoethylamine and 2-thiobarbituric acid. In Example 1 specified proportions of 1-phenyl-3-pyrazolidone, sodium sulphite, sodium carbonate, sodium hydroxide, 1-ascorbic acid and monothioglycerol provide a formula for processing time of 30 to 90 seconds with direct positive paper to give prints unaffected on exposure to ultraviolet radiation. Example 2 specifies hydroxylamine hydrochloride, monothioglycerol, sodium hydroxide and 5-methyl benzotriazole for similar use, and this composition may be applied to an unexposed emulsion layer for a few seconds immediately before exposure for stable print production without subsequent treatment. Examples 3-7 are generally similar. 26 of the pyrazolidones are listed. Specifications 631,184 and 693,632 are referred to. Reference has been directed by the Comptroller to Specification 542,502. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9875904-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015340241-A1 |
| priorityDate | 1957-09-30^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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