IMPROVED ORIGINAL PLATE FOR THERMOSENSITIVE DIRECT LITHOGRAPHY

摘要

PROBLEM TO BE SOLVED: To stably and simply provide an original lithographic plate from which a lithographic plate with high plate wear and high dimensional accuracy is obtained. SOLUTION: This improved original plate for thermosensitive direct lithography consists of an image forming layer containing a microcapsulated lipophilic content which is thermally convertible to an image part and a three- dimensionally hydrophilic binder polymer and an anchor layer which has a three-dimensional crosslinking structure present in a base material and its intermediate layer and at least the 0.5mm equivalent/g of a primary amino group or its mineral acid salt bonded to an aliphatic or an alicyclic compound, in the solid content. Thus, it is possible to obtain the original plate for thermosensitive direct lithography which constitutes the image forming layer under a wide range of combinations and also simply and stably form a non- image part on the base material to maintain the image forming part as it is by forming the anchor layer which is appropriately hydrophilic and strongly water-resistant as an intermediate layer between the image forming layer and the base material.