Process for preserving planographic printing forms
US4349391A · kind A · utility
7Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 18, 1981 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Feb 18, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N3/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
This invention relates to an improved process for preserving a planographic printing form which is ready for printing. In the process, the planographic printing form is treated with an aqueous solution of a water-soluble, film-forming high-molecular weight organic compound and a hydrophilizing acid and is then dried. The hydrophilizing acid used is an organic phosphonic acid, in particular polyvinyl phosphonic acid, preferably in a concentration from 0.05 to 10 percent by weight. As the water-soluble, high-molecular weight organic compound gum arabic, dextrin or polyvinyl alcohol is appropriately used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.