etching aluminum

Does anyone know of a procedure for etching aluminum. I've heard (3rd hand
or so) of someone who discolored aluminum then etched it with a laser
etcher. The discoloration is presumably to add contrast. The aluminum is for
large 3' X 6' panels which would mount on the outside of a building.
Thanks for any help,
James Deckert
Reply to
James Deckert
Loading thread data ...
If you only need a light etch (eg; for surface finish), sodium-hydroxide (AKA caustic soda, as used in drain cleaners) is cheap, fast & easy. You can mask with paint, tape, etc for patterning, or paint on the solution for artistic effects.
ObSafety: As with acids use lots of water in a non-metal, heat-resistant container, wear rubber gloves & safety goggles, always add small amounts of the crystals at a time, watch the temperature of the solution, & avoid splashing.
Reply to

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.