http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4987060-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b73bb5b611ad02b686a7967bc6ca3412 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-266 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-29 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-29 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-26 |
| filingDate | 1990-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1991-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1343ad2dd606a9327b72ed1798c41941 |
| publicationDate | 1991-01-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4987060-A |
| titleOfInvention | Concentrated photographic developer composition and method of making it |
| abstract | A concentrated alkaline photographic developer composition, packaged in a single part to be diluted with water to form a ready to use developing solution for silver halide photographic materials, which comprises dihydroxybenzene developing agents, inorganic alkali agnets, inorganic antioxidant agents, sequestering agents and antifoggants, wherein said inorganic antioxidant agents comprise Na 2 SO 3 (sodium sulfite) and K 2 SO 3 (potassium sulfite) in a molecular ratio of 1:1 to 1:3 in an amount of from 1.6 to 4 moles per liter, the molecular ratio between said inorganic antioxidant agents and the developing agents is from 1.50 and 4.00, and said concentrated developer composition has a specific gravity higher than 1.300 at 20° C., and n a method of making a concentrated alkaline photographic developer composition, packaged in a single part to be diluted with water to form a ready to use developing solution for silver halide photographic materials, which comprises dihydroxybenzene developing agents, inorganic alkali agents, inorganic antioxidant agents, sequestering agents and antifoggants, characterized in that comprises the following steps: n (a) preparing an aqueous KOH concentrated solution having a specific gravity not higher than 1.110 at 20° C., n (b) adding to the resulting solution inorganic antioxidant agents which form sulfite anions (SO 3 -- ) in aqueous solution, at least half in moles of which being NA 2 S 2 O 5 (sodium metabisulfite), in a quantity of from 0.8 to 2 moles per liter, n (c) adding to the resulting solution further aqueous KOH concentrated solution until the specific gravity of the resulting solution is ≧1.175 at 20° C., n (d) adding to the resulting solution developing agents in such a quantity that the molecular ratio between said inorganic antioxidant agents and the developing agents is from 1.5 to 4.00, and n (e) adding the other components of the developer composition in such a quantity to obtain a concentrated developer composition having a specific gravity higher than 1.300 at 20° C. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6664036-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5891609-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5478706-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0753793-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5376510-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2004058283-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5998110-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6387607-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6077653-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5258268-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2002010963-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5534389-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0848287-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5869226-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6602655-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5210010-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6228567-B1 |
| priorityDate | 1989-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 128.