| 摘要 |
PURPOSE:To enable a stuck trace to be erased with an erasing liquid containing no fluoric acid and solve an ink attachment problem due to burning treatment by specifying a photosensitive material. CONSTITUTION:This photosensitive planographic printing plate is formed by coating an aluminum plate grained and anodized on the surface with a positive type photosensitive resin composition containing at least an alkali-soluble resin and at least one kind of photosensitive substance of polyhydroxyl 1,2- or 2,1- naphthoquinonediazido-5- or -4-sulfonate represented by formula I in which each of R1-R27 is, independently, H, OH, halogen, alkyl, alkoxy, nitro, alkenyl, aryl, aralkyl, alkoxycarbonyl, acyl, aryloxy, or aralkoxy. |
