Homebrew PCBs

You pretty much got the answers from Stefan and Denny. There 
are other etchants commonly used but are more difficult to 
control and better suited for industry where the process can 
be easily controlled (at the expense of complex and costly 
equipment). Alkaline ammonia type etchants are a common 
industrial PCB etchant.

You will find recipes of old etchants that are no longer 
used because of environmental or safety problems. e.g. 
chromic acid, or sodium chlorite etchants.

Your best to collect much information on available etchants 
and then choose one you think is best for you. Then you will 
waste less time experimenting with etchants and learning how 
to use them since each chemistry behaves differently. Some 
are regeneratable , some are not. So if you do a lot of 
etching a regeneratable etchant may be more suitable.

Adam


Udara Dewamuni wrote:

> Hi guys,
> 
>         I going to do an experiment with Etching
> chemicals.  What is the best etching chemicals u guys
> recomand for PCB etching except Ferric Cloride?
> 
>                                               Cheers,
>                                               Udara
>