| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an original lithographic printing plate which is excellent in resistance to plate wear/print smear and resistance to micro-corrosion stain and can develop an image aboard the machine. <P>SOLUTION: The original plate of lithographic printing plate has a photosensitive layer comprising a sensitizing dye (A), a polymerization initiator (B), a polymerizable compound (C) and a binder polymer (D), and a protective layer in this order on a support, wherein the substrate is made by using an aluminum alloy plate wherein the density, on the surface, of an inter-metallic compound having a circle-equivalent diameter of 0.2 μm or more is 35,000 pieces/mm<SP>2</SP>or more, and the number of aluminum carbide having the maximum length of 1 μm or more is 30,000 pieces/g or less. <P>COPYRIGHT: (C)2011,JPO&INPIT |
