Lithographic master base material.

摘要

A lithographic printing plate comprising a polymeric base having one water or alcohol receptive surface forming the non-printing areas of said printing plate, and ink receptive printing areas bonded to said water or alcohol receptive surface of said polymeric base, said water or alcohol receptive surface being produced by graining or forming a water receptive reaction product on the base by reacting phenol, sodium hydroxide and sodium formaldehyde-sulfoxylate thereon, or laminating to said base a water or alcohol receptive polymeric material.