http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-386365-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3b98ef44ab9f0a8a30f4f26e51a95bdf http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_aa98af0804fa69408812d0fe1a05b382 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_df96cc4e73209aa9097fab5c3a348a24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_72795f5d0290ea89b726ac0cbee9ff7b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06P5-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06P5-12 |
| filingDate | 1931-09-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1933-01-19^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-386365-A |
| titleOfInvention | Improvements in dyeing with vat dyestuffs |
| abstract | Printing with vat dyes. A composition containing a vat dye, an alkali and a hydrosulphite is applied to selected areas of a fabric to resist a composition subsequently applied containing a vat dye and a ferrous reducing agent. Alternatively, a composition containing a vat dye, a ferrous reducing agent and an excess of free acid, e.g. lactic or tartaric acid, is applied to selected areas to resist a composition subsequently applied containing a vat dye, an alkali and a hydrosulphite. In each case the second composition may be applied to selected areas or otherwise. Advantageously a membrane may be formed between the first and second compositions, e.g. by adding manganous chloride to the acid-containing composition or by using a thickening readily dispersed by alkali, e.g. gum senegal or locust bean thickening. The following examples are specified : (1) A mercerized cotton fabric is printed with a mixture containing Indanthrene golden yellow RK, British gum, caustic soda solution and sodium formaldehyde hydrosulphite, aged for 3 mins., padded with a preparation containing Alizanthrene blue RS, locust bean thickening, ferrous sulphate, lactic acid, stannous chloride and manganous chloride, dried, aged for 3 mins. in formic acid vapour, treated for \ba1/2\be min. in a solution at 190 DEG F. containing manganese dioxide and caustic soda, washed in hot water, soured, rinsed and soaped. (2) A mercerized cotton fabric is printed with a mixture containing Indanthrene, golden yellow RK, British gum, caustic soda solution, sodium formaldehyde-hydrosulphite and sodium chlorate, aged for 3 mins. and then aged for a further 3 mins. in formic acid vapour, padded as in (1), dried, treated in a solution at 190 DEG F. containing manganese dioxide and caustic soda, washed in hot water, soured, rinsed and soaped. (3) A cotton fabric is printed with a mixture containing Indanthrene red FBB, alcohol, British gum, caustic soda solution and rongalite C, aged, cover printed with an Alizanthrene blue RS preparation made up as in (1) and further treated as in (1) to obtain a fast blue cover on a fast red resist. (4) A cotton fabric is printed with a mixture containing Caledon blue R, starch tragacanth thickening, ferrous sulphate, lactic acid, stannous chloride and manganous chloride, dried and padded in a liquor containing Indanthrene golden yellow RK, thin British gum, potassium carbonate and sodium formaldehyde sulphoxylate, aged, developed in caustic soda solution at 200 DEG F., washed in cold dilute caustic soda, treated with sulphuric acid, oxidized with sodium perborate and washed in soap and soda. |
| priorityDate | 1931-09-19^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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