Method of hardening photopolymeric printing material using warm air
US4264712A · kind A · utility
3Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Sep 26, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/40
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photopolymeric printing plates that have been imaged and etched are hardened by drying to remove surface moisture and are slowly and evenly heated while circulating warm air over the plate to prevent hot spots and remove vaporized material. Letter press type plates are heated up to 120.degree. C. to 150.degree. C., and intaglio type plates are heated to 200.degree. C. to 220.degree. C. Intaglio plates are also preferably coated with a thin layer of a fluorotelomer material before the heating is completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.