| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an original plate for a lithographic printing plate which has satisfactory sensitivity in scanning exposure with a laser light source having a wavelength shorter than 450 nm, such as InGaN, can be handled even under bright safelight, and is excellent in printing durability, stain resistance, stability and economical efficiency. <P>SOLUTION: This original plate has a photosensitive layer containing (A) an optical whitening agent, (B) an activator compound, (C) an addition polymerizable compound and (D) a polyurethane resin binder, wherein the polyurethane resin binder (D) is synthesized from (i) a diisocyanate compound, (ii) a diol compound having a carboxyl group, (iii) a diol compound whose logP value is <0 and (iv) a diol compound whose logP value is >0. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
