| 摘要 |
PURPOSE:To provide the easily visible printing image part after dyeing and to substantially prevent the generation of fogging in spite of the conduction of an exposing operation under a white fluorescent lamp by providing a primer layer, a photosensitive layer and a silicone rubber layer in this order on a base and incorporating a 1, 2- naphthoquinone-2-diazide-4-sulfonate compd. into the photosensitive layer. CONSTITUTION:The primer layer, the photosensitive layer and the silicone rubber layer are provided in this order on the base and the 1, 2-naphthoquinone-2-diazide-4- sulfonate compd. is incorporated into this photosensitive layer. The photosensitive layer contg. the 1, 2-naphthoquinone-2-diazide-4-sulfonate compd. is less yellowish, i.e., the appearance of the plate material itself is less yellowish. The blue color of the printing image part is, therefore, easily visible in the relation with the appearance of the plate material itself when the printing image part is dyed blue. Since the absorption wavelength of the plate material is on the short wavelength side, the plate material is hardly sensitive to the light of the white fluorescent lamp. The image after dyeing is easily visible in this way and is hardly sensitive to the light of the white fluorescent lamp. The generation of the fogging is substantially prevented. |
