POSITIVE-WORKING IMAGEABLE MEMBERS WITH BRANCHED HYDROXYSTYRENE POLYMERS

摘要

Both single-layer and multi-layer positive-working imageable compositions can be used in positive-working elements having a substrate and at least one imageable layer. These elements can be used to prepare lithographic printing plates. The imageable elements include a radiation absorbing compound and a hydroxystyrene polymer having repeating branched hydroxystyrene units.