| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of making the surface of aluminum or an aluminum alloy high in decorativeness having metallic luster and a crystal pattern. <P>SOLUTION: A pure aluminum or aluminum alloy material is subjected to pretreatment of crystal precipitation and grinding for one or more times. If required, etching treatment is additionally performed thereto, and next, anode oxidation treatment is performed thereto. Thus, an aluminum material high in decorativeness in such a manner that the difference in crystal orientation is vividly exhibited without losing luster and a metal crystal pattern by the reflection of light is floated up while maintaining its corrosion resistance is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
