Homebrew PCBs

DJ Delorie wrote:
> Russell Shaw <rjshaw@...> writes:
>>> Are the chemicals rather tame these days too?
>> Dilute Na2CO3 (from pool shop), and dilute NaOH.
> 
> But are they tame?  I mean, do they outgas during use, do I need vent
> fans, special cleanup rules, etc?  FeCl is messy, but not "dangerous"
> that way, and it doesn't go bad if I don't use it for a while.

10% Na2CO3 is used for negative developer and doesn't gas, even
when i heat it to 25-30degC in the microwave.

10% NaOH is used for negative resist stripping and doesn't gas, even
when i heat it to 80degC in the microwave.

>>> I wouldn't mind trying out photoetch, but I'm not a big fan of
>>> having lots of chemicals in the house.
>> Then stop eating and cleaning;)
> 
> :-)
> 
> That reminds me, I still have some sulfuric acid kicking around from
> many years ago.  Is that at all useful in pcb making?

I can't recall it being useful for any pcb stuff. It might be useful
for electroplating.