| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet for planographic printing plate, excellent in stain resistance of an image part and uniformity of appearance after a roughening treatment, especially an aluminum alloy sheet useful for an on-board developing type printing sheet, and to provide a manufacturing method therefor.SOLUTION: An aluminum alloy sheet for planographic printing plate contains Fe:0.05 to 0.30 mass%, Si:0.05 to 0.20 mass%, Cu:0.001 to 0.05 mass%, Ti:0.005 to 0.05 mass% and the balance of Al with inevitable impurities and AlFe is 0 to 500 pieces/mmof intermetallic compounds having a circle-equivalent diameter of 1.0 μm or more on the aluminum alloy sheet surface. A manufacturing method therefor is also provided. |
