View source for Project talk:Deactivating a ferric chloride solution

Ferric Chloride is convenient for small projects, but it is used up and disposal is a pain. An alternative is an etchant that can be regenerated by adding HCl and bubbling air through it.

*[http://www.xertech.net/Tech/CuCl_ech.html CuCl etch]
*[http://members.optusnet.com.au/eseychell/PCB/etching_CuCl/index.html#sg_control etching CuCl]
*[http://tech.groups.yahoo.com/group/Homebrew_PCBs/ Yahoo - Homebrew PCBs]

I understand from some sources that adding HCl to Ferric Chloride will also regenerate it and eventually the etchant changes to CuCl as above. I don't know how carefully that procedure needs to be managed, or whether it's better to start directly with the CuCl bath.