Homebrew PCBs

morriso2002 wrote:
> 
> Thanks to everyone who replied - particularly with the news that Farnell 
> still sells FeCl3. It looks like the hexahydrate, but that's OK. It 
> seems I will be able to continue using my favourite etchant for a while yet.
> 

Any particular reason you want it without water molecules ?
You have to add water for it to etch anyway.

People prefer to buy and sell a near saturated 40% (wt) solution because 
it is easier to store long term.