Lithographic printing plates having a hydrophilic barrier layer overlying an aluminum support.

摘要

Improved lithographic printing plates are comprised of an aluminum support, a hydrophilic barrier layer comprised of a copolymer of 40 to 90 mole percent vinylphosphonic acid and 10 to 60 mole percent acrylamide overlying said support, and an image-forming layer capable of providing a lithographic printing surface overlying said barrier layer.