Emulsion for post-treating planographic printing plates prepared by electrophotographic means and process for producing the printing plates
US4748098A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 1987 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | May 21, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N3/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An emulsion for post-treating planographic printing plates prepared by electrographic means can be used to improve the print quality of treated plates. The emulsion comprises (i) about 25% to 60% by weight of an aqueous phase comprising a phosphonic acid compound and a water-soluble hydrophilizing polymer and (ii) about 40% to 75% by weight of an organic solvent phase comprising a hydrocarbon mixture containing at least 20% by weight of aromatic components. A process for the production of planographic printing plates that employs this emulsion is simplified and less costly than conventional processes, and entails fewer environmental hazards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.