Stop using Ferric Chloride etchant! (A better etching solution.)
This instructable shows an alternative to etching PCBs with Ferric Chloride.
Ferric chloride is kinda nasty stuff. Quick to exhaust its etching power, non-reusable, kinda pricey, and ends up full of copper salts that are bad for the environment if you’re pouring them down the drain. (For instance: How to Dispose of Ferric Chloride in this FAQ. )
Wouldn’t it be nice if there were an etchant that you could re-use indefinitely so that you don’t have to worry about disposing of the copper, and that could be made in lifetime supply for like $10.00 with ingredients bought at hardware and drugstores? (And it’s prettier too.)
I got seven words for you: Copper Chloride in Aqueous Hydrochloric Acid Solution! (Exclamation point!)
