| abstract |
A presensitized printing plate suitable for waterless planographic printing is disclosed which comprises a layer support, a radiation-sensitive layer containing n (a) a compound possessing at least one C--O--C bond, which can be split by acid n (b) a compound forming a strong acid upon irradiation, and n (c) a water-insoluble binder, an outer, ink-repellent, crosslinked silicone elastomer layer, and an intermediate layer comprising amorphous silicic acid by which the adhesion of the silicone elastomer layer to the radiation-sensitive layer is improved. The photosensitivity of this printing plate is considerably improved, as compared to known negative-working printing plates that can be used for waterless offset printing. The processes of making and using the presensitized printing plate are also disclosed. |