Roland F. Harriston wrote:
> Dave:
>
> I personally think that Ferric Chloride is one of the worst compounds to
> have around in a domestic environment, or in any environment that is
> not specifically designed to accommodate this material. Most of the
> technical descriptions that I have seen regarding this material
> describe it as "highly corrosive". It emits fumes even at normal room
> temperature.
>
> Muriatic+Peroxide is also corrosive, but not as bad as Ferric Chloride.
> Employ measures to protect.
I just put a block of wood over the Ferric Chloride etching tank when
i'm not using it. I typically do 30+ PCBs in it and change it once a year
or two. I add a bit of HCl every few months to keep it more active.
Much more economical than Muriatic+Peroxide and doesn't degrade with time.