Patent ID: 7029597
Filing Date: 2006-04-18
Classification: C23G,C25D

Abstract:
1. A process for modifying a continuous web of aluminum comprising: providing a continuous, unanodized web of aluminum including a first side and a second side; anodizing the web to create an anodic layer on each of the first side and the second side; sealing the anodic layer; and advancing the web over a roller, the roller at least partially submersed in a composition comprising sodium hydroxide, wherein the roller transfers the composition to and selectively etches the first side, but not the second side, wherein the composition dissolves a first portion of the anodic layer on the first side and thereby roughens a remaining portion of the anodic layer created during said anodizing on the first side, wherein the anodic layer on the second side remains undissolved by the composition.