LITHOGRAPHIC PRINTING PLATE PRECURSOR AND PROCESS FOR PRODUCING LITHOGRAPHIC PRINTING PLATE

摘要

Provided is a lithographic printing plate precursor which shows satisfactory developability by a developing solution having a pH of 12 or less and which comes to have high printing durability and satisfactory scratch resistance and have improved ink receptibility. The lithographic printing plate precursor is a positive type precursor that comprises a base and, formed on the base, an image-forming layer comprising a resin which is insoluble in water and is soluble or dispersible in alkaline aqueous solutions, and that is characterized in that the image-forming layer comprises a lower layer and an upper layer and the resin in the lower layer and/or in the upper layer comprises a polyurethane including a unit which contains a substituent having an acidic hydrogen atom and a unit represented by general formula (I). (In the formula, Rf is an alkyl or polyether group in which at least 50% of the hydrogen atoms have been fluorinated, R1 is a hydrogen atom or an (un)substituted alkyl group, m is 0 or is 1-10, n is 1-30, and x is 1-4.)