Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Roland F. Harriston"
<rolohar@...> wrote:
>
> 
> 
> Repeat..............
> 
> Don't use metals around Ferric Chloride.........period.
> 
Please let me clarify the HCL and H202

HCL is standard Muriatic Acid (aprox 33%)availible at walmart $4.00/gal
H202 is 3% about a dollar per quart also at walmart the kind used to
treat cuts

I might add neither are temperature sensitive. I store both in a
outside garage with extremes of temperature both summer and winter.
Just make sure you dont store the HCL near anything metal because some
fumes will leak out and corrode it.

Water dilutes the acid and I alway have a full 5 gallon bucket of
water near me when I etch. After the etching is completed I carefully
remove the pcb and rinse it in the bucket. Then I just dump the
etchant into the five gallon bucket. This makes the disposal easier as
the solution is then only mildly acidic.

Be carefull dont get your eyes anywhere close to the etchant.

Dennis Waggoner