FERRIC CHLORIDE ETCHING CHEMISTRY

[ladyada] has republished an fascinating snippet from the synthDIY mailing list. [David Dixon] talks about the actual chemistry behind ferric chloride based house circuit card etching. He concludes that ferric chloride is essentially a ‘one-shot’ oxidant. It can’t be regenerated as well as can be challenging to dispose of properly. The utilize of acidified copper chloride is a much much better path as well as becomes much more efficient with each use, as long as you keep it aerated as well as top up the acidity from time to time. This etchant service is really the result of at first utilizing hydrogen peroxide as an oxidant together with muriatic acid. You can see us utilizing this service in our etching how-to as well as while producing the board for our RGB lock. For much more info on utilizing hydrogen peroxide, inspect out [Adam Seychell]’s guide as well as this Instructable.

Aside: [ladyada] has added the receiver code to the Wattcher job page.