| 摘要 |
<p>1. Offset printing plates with a metallic hydrophilic surface and an ink-accepting surfaces obtained from a photosensitive printing layer, comprising a steel support having a shiny and smooth hydrophilic surface, charactrized in that said shiny hydrophilic surface is at least partly coated with a dull and porous layer of chromium, said layer having a thickness less than one micrometer.</p> |
