RADIATION-SENSITIVE COMPOSITIONS AND ELEMENTS WITH SOLVENT RESISTANT POLY(VINYL ACETAL)S

摘要

A radiation-sensitive composition can be used to prepare positive-working imageable elements having improved solvent resistance and is useful for making lithographic printing plates. The composition includes an alkaline soluble polymeric binder that is a specific poly(vinyl acetal) that exhibits improved resistance to press chemicals, and a radiation absorbing compound.