Patent ID: 7682775
Filing Date: 2010-03-23
Classification: G03F

Abstract:
1. A process for preparing a flexographic printing plate comprising in order: a) providing a photosensitive element comprising a support, and at least one photopolymerizable layer comprising at least one elastomeric binder, at least one ethylenically unsaturated compound photopolymerizable by actinic radiation, and at least one photoinitiator or photoinitiator system; b) providing a photomask adjacent the photopolymerizable layer opposite the support; c) exposing the photosensitive element with ultraviolet radiation between 200 and 300 nm through the photomask; d) exposing the photosensitive element with ultraviolet radiation between 310 and 400 nm through the photomask to photopolymerize areas of the photopolymerizable layer exposed to ultraviolet radiation; and e) treating the exposed photosensitive element to remove unpolymerized areas of the photopolymerizable layer not exposed to ultraviolet radiation, thereby forming a relief surface suitable for printing.