I have a small sample of anodized aluminum extruded profile, 40 mm wide, used for flooring, with the visible upper convex surface decorated with mixed colours and pattern, wheras the lower surface is matt anodized. What I would like to know is how that special anodized finish is obtained. Any advise highly appreciated. You can see the photos of the sample at:
http://www.angelfire.com/al/aluminum...anodizing.html
Thanks in advance...