ALUMINUM ALLOYS FOR LONG RUN PRINTING PLATES

摘要

The present invention consists of an aluminum alloy having a high fatigue strength which is particularly suited for use in the fabrication of printing plates for offset lithography. The alloy contains form 0.2 to 0,75 wt.% magnesium, from 0.45 to 0.7 wt.% copper, from 0.1 to 0.7 wt.% iron and up to 0.3 wt.% silicon. The alloy, when processed according to the process of the present invention possesses a uniquely high fatigue strength.