RADIATION-SENSITIVE COMPOSITIONS

摘要

RADIATION-SENSITIVE COMPOSITIONS Radiation-sensitive elements, e.g. printing plates, comprising a substrate having coated thereon a photosolubilisable composition comprising an alkalisoluble phenolic resin and an onium salt. The onium salt imparts a solvent resistance to the phenolic resin which is removed upon exposure to radiation thereby providing a solubility differential between exposed and unexposed areas of the composition.