| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy plate for a printing plate which has high electrolytic efficiency, and in which reactivity, the fineness of pits and the uniformity of the roughened face can be improved in electrolytic roughening treatment at a high current density and in a short time, and a production method therefor. SOLUTION: An aluminum alloy ingot having a composition containing, by mass, 0.25 to 0.45% Fe, 0.02 to 0.08% Si and <=0.04% Cu, and the balance Al with inevitable impurities, and in which the content of Ni in the inevitable impurities is controlled to <=0.005% is subjected to homogenizing treatment at >=550 deg.C, and is thereafter hot-rolled at a starting temperature of 400 to 450 deg.C. Subsequently, the plate is subjected to annealing treatment of rising its temperature at the average temperature rising rate of 10 to 60 deg.C/hr for at least one time, and performing holding at 450 to 500 deg.C for 1 to 20 hr, so that the aluminum alloy plate is produced. |
