Homebrew PCBs

Hi Adam -

An automated process would take the tedium and time out of it. But do
you know of sensors up to the job? A SG sensor might not be too hard
to improvise. But molarity?

Grant


--- In Homebrew_PCBs@yahoogroups.com, Adam Seychell <a_seychell@y...>
wrote:
> grantfair2001 wrote:
> > 
> > A short PS to my last poat. When I started using this etchant in May
> > 2003 the SG was 1.245; as noted last post it is now 1.262.
> > 
> > Gramt
> 
> Thanks for the info. Its just that I've seen wide variations in etch 
> performance with this etchant, so I'm just trying to nut out what makes 
> it work. It seems S.G > 1.30 and acid > 1M. Might one day do a
series of 
> controlled tests. 20 minutes sounds reasonable, for your setup.