| 摘要 |
<p>A description is given of a metal plate which is suitable, in particular, for the manufacture of an gravure printing sleeve. Said metal plate comprises a mechanically engravable metal layer on which there is at least one mechanically engravable a harder top layer, which top layer is wear-resistant, has a material stretch of 0.1-5%, and has a Vickers hardness of 400-1050. The mechanically engravable metal layer has a material stretch of less than 3% and a Vickers hardness of approximately 80-350. The top layer can be chosen from the metals or metal alloys which can be electrolessly or electrolytically deposited, or it may be composed of ceramic material. Expediently, the top layer can be hardened so that, after engraving, the metal plate has an engraved top layer having a still higher Vickers hardness. A method for manufacturing the present composite metal plate comprises applying, moreover, at least one top layer having a hardness which is greater than the hardness of the engravable metal layer and a thickness of not more than 10 mu m to the mechanically engravable metal layer. Further, a process for mechanically engraving a pattern into an engravable metal basic layer is described.</p> |
