Water developable positive acting lithographic printing plate
US4507382A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1983 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Mar 3, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/117
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Water-developable positive acting lithographic printing plate. The plate is prepared by first coating a substrate with an oleophilic composition, drying and curing the composition to form an insoluble adhering oleophilic layer and then overcoating said oleophilic layer with a water soluble photopolymerizable composition. Upon imagewise exposure of the plate, the photopolymerizable composition polymerizes in the non-image areas. Upon development with ordinary tap water, the unpolymerized image areas of the photopolymerizable composition are washed away, leaving an oleophilic surface in the image areas and a hydrophilic surface in the background.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.