| 摘要 |
PROBLEM TO BE SOLVED: To provide an original plate for a lithographic printing plate permitting the direct depiction of digital image information from a computer by the use of high energy light, and a manufacture of the printing plate employing this. SOLUTION: The heat-sensitive component contains anion type self-water dispersive resin particles having an acid number of 10-300 and an average of particle diameter of 0.005-15 micrometers, and a fluorine interfacial active agent. The composition is coated on an ordinary negative PS plate or positive PS plate in order to obtain an original plate for a lithographic printing plate, and further to obtain a lithographic printing plate by implementing image exposure by high energy light on the basis of digital image information from a computer, the first development by an alkali solution, the entire exposition by active rays, the second development by a negative or positive developing solution, and a process of the post treatment. |
