http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-678599-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ea12ff7733b44dd4c2f4899af26cf39e |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F7-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F7-0125 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F7-012 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F7-40 |
| filingDate | 1950-10-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1952-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-678599-A |
| titleOfInvention | Improvements relating to the production of colloid photo-images for use in photomechanical printing |
| abstract | 678,599. Photographic processes and photomechanical printing plates. KALLE & CO. AKT.-GES. Oct. 2, 1950 [Oct. 10, 1949], No. 24075/50. Class 98 (ii). A layer comprising a water-soluble colloid and an aromatic azido compound on a base as of aluminium, zinc or glass is exposed under a negative, washed with water to remove unexposed parts of the layer, and heated as in an oven to between 200‹ C. and 400‹ C. to tan the remaining colloid and convert it to a mechanically resistant and fatty ink receptive form. The colloid may be polyvinyl pyrrolidone, polyvinyl alcohol, polyacrylic acid or its salts, polyacrylic acid amide and its N-substitution products, gum arabic glue, casein, albumin gluten, cellulose ethers, carboxy alkyl cellulose or tragacanth. The azido compound may be sodium 4 : 4-diazidostilbene-2 : 2<SP>1</SP>-disulphonate, sodium 1 : 5 - diazido - naphthalene - 3 : 7 - disulphonate, or the sodium salts of 4-azido-naphthaiene-1 : 8-dicarboxylic acid, 4 : 4-diazidodiphenylmethane-3 : 5-dicarboxylic acid or 4- azido-benzalacetone-2-sulphonic acid. Sensitizing agents such as eosin, or non-sensitizing dyestuffs such as methylene blue which impart visibility to the tanned areas after washing may be added to the coating solutions. Four examples describe coating solutions, coating of plates, exposing and processing to printing plates; and eight further examples describe additional coating solutions only, all of the examples using the materials listed above. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4250096-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2778735-A |
| priorityDate | 1949-10-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 38.