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
>