Homebrew PCBs

YD wrote:
> 
> If you add muriatic (hydrochloric) acid and oxygenate
> it converts to copper chloride. Looking at the
> reactions described in
> 
> http://artmondo.net/printworks/articles/ferric.htm,
> http://www.p-m-services.co.uk/ferric_chloride.htm and
> http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html
> 
> you'll find that with excess acid the iron turns into
> insoluble ferric hydroxide (rust) and falls out as
> sludge. What's left is the regeneratable CuCl2.
> 
> I did this myself for my etch tank so I know it works.
> In the beginning it seems quite messy due to the rust
> depositing on the walls and bottom of the tank but
> careful decanting and a good scrub takes care of it.
> 
> - YD.


How about a bottle of compressed pure chlorine gas ? Just throw a hose 
going from the regulator mounted on the cylinder, to your bubble etcher, 
and let it rip. :)  May not be a good idea to do this in the kitchen.