Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

well, i use the method myself, and as it was already written
it is not dangerous at all if you take care.

I store the bottle of HCL and the bottle of H2O2 (bot 35% 1 liter plastic)
in the same room where my tools are. No corrosion problems.
the ONLY problem i ever had was forgetting a jar filled with some etchant.
This vaporized and when i came back a lot of drills and other nearby tools
were
corroded.

The used Etchant i stored, also for years, in a glass bottle with a lid
which has a 1mm hole in the top.
(because i wanted to release the h2o2 pressure).
My new etching jar will only be a tupperware container and the lid of this
is also enough to prevent
any corrosion.


You see, no problems at all with the stuff on this site...
The bottles i use are the "standard" from my chemists shop,
Poly Ethylene with a red "child safe" cap (the one you need to press
down to unscrew). the cap has such a soft, "foam plastic" seal in it.
They are absolutely airtight.

Only the HCl Bottle shows salt on the outside, which seems to come through
the
PE. it is not much and i have placed it in a sleeve of another bottle
(only because i don't want to touch this salt every time).



I add the H2O2 to the etchant (which seems to be the easiest way)
and never have seen any splashing at all.


If you use the correct concentrations this is a very kind and forgiving
etchant,
and very cheap. I think it will work out for you if you use the right
concentration.


Wear safety googles all the time, old clothing and gloves are suggested.


ST