Process for the electrochemical graining of aluminum for use as printing plate supports

摘要

The present invention relates to a process for the electrochemical graining of aluminum or aluminum alloys useful for printing plate supports, in which process an acid electrolyte containing beta -diketo compounds is employed; preferred are hydrochloric or nitric acid with an acetylacetone admixture. The printing plate supports grained by the process possess a particularly uniform, pit-free and overall graining structure.