SURFACTANT-PRETREATED PRINTING PLATE SUBSTRATE, LITHOGRAPHICPRINTING PLATE AND METHOD FOR PRODUCTION THEREOF

摘要

A printing plate precursor for direct receipt of an image-wise applied ink receptive layer, the precursor having a desorbable surfactant adsorbed on at least one surface in an amount effective to improve the resolution of the subsequently image-wise applied ink receptive layer. The printing plate precursor can be used to prepare a printing plate having improved resolution . The printing plate may be prepared by (a) applying a desorbable surfactant t o at least one surface of a printing plate substrate, (b) removing non-adsorbe d surfactant from the surface, (c) applying a fluid composition containing an ink receptive material onto at least a portion of the surface in the from of a desired image, thereby providing an ink receptive image layer; and (d) removing the desorbable surfactant from any area of the surface which does n ot form part of the desired image.