| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy sheet in which the damage of fine decorativeness is reduced in a state of being a worked and coated can even in an environment where light is relatively easy to pass through the aluminum surface. SOLUTION: In a cross-sectional curve parallel to the LT direction in the length of 500μm measured at optional positions by a method according to JIS-B0601, provided that the LT direction is taken as the x axis, the depth direction is taken as the y axis, and the coordinates of optional two points are taken as P1(x<SB>1</SB>, y<SB>1</SB>), and P2(x<SB>2</SB>, y<SB>2</SB>), the pair of the two points (P1, P2) satisfying ¾(y<SB>2</SB>-y<SB>1</SB>)¾≥2.0μm, and ¾(y<SB>2</SB>-y<SB>1</SB>)/(x<SB>2</SB>-x<SB>1</SB>)¾≥0.07 are not present by≥6 pairs in the range of the length 500μm. It is more preferably that the region in the length 500μm satisfying the above conditions being≥90% linear density in the length 50 nm in the LT direction. COPYRIGHT: (C)2006,JPO&NCIPI
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