| 摘要 |
<p>Disclosed is a method of manufacturing a lithographic printing plate support wherein an aluminum plate is subjected at least to, in order, a mechanical graining treatment in which the aluminum plate is grained to a mean surface roughness R a of 0.25 to 0.40 µm using a brush and a slurry containing an abrasive, an electrochemical graining treatment in which the aluminum plate is grained using an alternating current in an aqueous solution containing nitric acid, and an alkali etching treatment in which the aluminum plate is etched in an aqueous alkali solution, thereby obtaining the lithographic printing plate support having a mean surface roughness R a after the alkali etching treatment of 0.41 to 0.6 µm. By this method, there can be obtained a lithographic printing plate support for use in presensitized plates which, when processed into lithographic printing plates, have a long press life, an excellent scumming resistance, and an excellent cleaner resistance.</p> |
