maybe the aluminum protects itself, like it does on air?
I don't know how does it affect copper, but it does. copper gets kind
of dull and some colors appear. The cleaner smells like pool water,
and it's supposedly "ecological", that is, it can go down the drain.
For what I have found out, it's made in USA. I don't have the bottle
here, I'll check the label tomorrow.
--- In Homebrew_PCBs@yahoogroups.com, "Bob_xyz" <bob_barr@h...> wrote:
> Thanks for the clarification. I had misunderstood what you were
> saying. I'm a bit surprised that screen cleaner attacks copper since
> it's used to clean aluminimum-framed screens. I suppose that it
> could weaken the bond between the copper and the laminate though.
>
>
> Regards, Bob
>
> --- In Homebrew_PCBs@yahoogroups.com, "hjf2k2" <drgenio@h...> wrote:
> > sorry, I didn't express myself clearly. the residue is there after
> > developing but before going into ferric chloride.
> >
> > to finally remove the emulsion, i do use screen cleaner. but it
> seems
> > to attack copper. i was told to use bleach or sodium hydroxide
> which
> > can remove the emulsion and won't attack copper... but I'm not so
> sure
> > about that. I use paint thinner and a little more work, and it goes
> > away, and thinner surely doesn't attack copper.
> >
> > regards,
> > hernan
> >