http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-162140-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cde433df25f388a41905bfe6fe70d8d3 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B44F11-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B44F11-02 |
| filingDate | 1920-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1921-04-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-162140-A |
| titleOfInvention | Improvements in or in connection with the production of imitation oil paintings |
| abstract | 162,140. Steedman, H. P. G. Feb. 26, 1920. Embossing; embossing-surfaces.-Oil paintings are reproduced by exposing to light a sensitized sheet of gelatine or other suitable material under a photographic negative, or a positive therefrom, prepared from the original painting or a painted copy, developing the exposed sheet to remove the unaffected parts, washing, drying, and hardening the sheet, as by applying formaldehyde, so as to form a matrix having variations in surface level corresponding to the canvas grain, brush markings, and variations in surface level of the painted parts of the original. From this matrix a die is prepared, preferably from plastic casein, wherewith printed copies of the original may be embossed so as to resemble the original. The gelatine &c. sheet is incorporated with sodium chloride and a mucilage of linseed oil, to which is added chrome alum and a sensitizing material such as bichromate of potash and ammonia. The plastic casein is introduced into a frame enclosing the matrix, is rolled and pressed therein, and is subsequently dried and hardened to form the embossing die, which is applied to the face or back of the print, corresponding respectively to the use of a photographic negative or positive; or both a male and a femael die may be used between which the prints are embossed. The following methods of preparing the plastic casein are described, viz. :-(1) Casein mixed with lime or other alkaline material is converted into a plastic mass by the action of water. (ii) Sulphonated rape oil is mixed with dried powdered casein and kneaded into a homogenenous mass, to which resin or caoutchouc and chalk or lime may be added, the product being hardened by vulcanizing with sulphur or by applying formaldehyde. (iii) Milk is heated to 140‹ F., borax is added, and the temperature raised to 190‹ F. in the presence of barium chloride or other mineral precipitant of casein, the precipitate pressed and ground with an addition of acetic acid, soda or other solvent and the resulting mass steam heated. (iv) Casein is made into a plastic mass with an aqueous solution of borax, the excess water removed and nitrocellulose added, the whole being then kneaded into a homogeneous mass. Specification 15108/11 is referred to. |
| priorityDate | 1920-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.