Homebrew PCBs

A couple of thoughts on Ferric Chloride...

Ferric Chloride will slowly dissolve an aquarium air stone.

It is the Ferric Chloride mist that causes problems in the area around
the etching tank. Unlike the HCL, with a much lower vapor pressure,
which also becomes a gas and affects a much larger area.

Yes, Ferric Chloride reacts with most metals, so use plastic.

Ferric Chloride will stain everything.

Overall. Ferric Chloride is less dangerous to work with than the
Muriatic (HCl) Acid..

Be Safe! Use eye protection and rubber gloves.

Myc

(retired Industrial chemist)