| 摘要 |
PROBLEM TO BE SOLVED: To make a planographic printing plate free of edge staining even in continuous printing on roll paper with a silver salt diffusion transfer type planographic printing original plate. SOLUTION: In a sheet- or roll-shaped silver salt diffusion transfer type planographic printing original plate having an aluminum support, a physical developing nuclei layer and a silver halide emulsion layer in this order, opposite two lateral faces are coated with a protective film. |
