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(Halloween) Hackerspace Happenings

(Halloween) Hackerspace Happenings

Are you a hackerspace member with an event you’d like to publicize? Send it to johnb@makezine.com or tweet me at @johnbaichtal and I’ll post it. Also feel free to subscribe to my hackerspaces Twitter list. Hackerspace Happenings runs weekly(ish) Tuesday(i)s(h). Mad Engineer’s Ball at Toronto’s Site 3 CoLabatory Site 3 will be throwing a Halloween […]

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How-To:  Anodize Aluminum Without Strong Acid

How-To: Anodize Aluminum Without Strong Acid

If you’ve ever wanted to experiment with aluminum anodizing but were put off by the conventional requirement for concentrated sulfuric acid, you will be very interested to read of Ken’s successes with an alternate process using the acidic sodium salt of sulfuric acid. This salt, sodium bisulfate (NaHSO4) is much safer to transport, handle, and dispose of than the strong acid, and appears to give anodizing results that are just as good or better.

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