Patent ID: 7125650
Filing Date: 2006-10-24
Classification: G03F,Y10S

Abstract:
1. A process of producing a relief image printing plate, the process comprising the steps of: a) providing a photosensitive printing element comprising: b) quenching dissolved oxygen in the photosensitive layer by pre-exposing the photosensitive layer to one or more sources of actinic radiation, wherein the range of wavelengths spanned by the one or more sources of actinic radiation is no more than about 20 nm; and c) imagewise exposing the photosensitive layer to actinic radiation to crosslink and cure the photosensitive layer; wherein the at least one photoinitiator is effective at the pre-exposure radiation wavelength and is present in the photosensitive composition in an amount sufficient to provide an optical density through the thickness of the photosensitive composition of between about 0.05 and 0.43 at a wavelength used to pre-expose the photosensitive composition.