(03-17-2015, 08:06 PM)Eeoorr Wrote: ... Radio Shack no longer supplies Ferric acid, so went with sulfuric acid. ...
The stuff from Radio Shack is ferric chloride and is pretty easy to find. I have a gallon of it down stairs for etching printed circuit boards. While googling a vendor for ferric chloride also google citric acid as an enhancement to ... not a replacement for ... the ferric chloride etching process.
Ferric chloride seems to be safe to use but be careful as it will permanently stain most everything it comes in contact with.
Arvid