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==Procedure==
[[File:Anodisation.jpg|right|thumb|350px|SchematicIdealised depiction of an anodized layer and schematic of the anodising process.]]Prepare the aluminum for anodizing by cleaning thoroughly using a fine steel wool to remove the surface contaminants and reduce imperfections. Take care not to cause micro metal contamination by pressing too hard. Note that the finish that goes into the tank is what comes out of the tank. Follow by a wash with a plastic scouring pad and washing up detergent (or 99.9% isopropyl alcohol). Rinse well and either proceed to the sodium hydroxide etch for 2 to 3 minutes and rinse again, or go directly to the anodizing solution. The etch step provides some bite for the solution and allows for slightly larger cell size. Aluminum alloys are highly variable so if possible experiment with scrap pieces.<ref name="obs"/>
Attach the negative battery lead to the cathode which should be at least as large as the piece being anodized. Attach the positive lead to the piece to be anodized. Ideally use an aluminum connector and relocate it during the process to make sure that all of the item is anodized.
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