| 摘要 |
<p>The method for treating the surface of printing plates which are partially coated with amphiphilic substances comprises treating them with an acid and a complex-former. An independent claim is included for aqueous compositions for treating printing plates which are partially coated with amphiphilic substances, the composition containing citric acid and ammonia in a molar ratio of 1:2 and being free from abrasives, solvents and surfactants.</p> |
