In message <5.1.1.5.2.20050531171753.01e95428@mail.interlog.com>
          Spehro Pefhany <speff@interlog.com> wrote:

> I don't think the ferric chloride is all that bad for you (tastes terrible)
> unless you ingest enough to get iron poisoning (liver damage, death etc.).

"A fatal case of acute ferric chloride poisoning"
Tinyurl: <http://tinyurl.com/dhyur>
(<http://toxnet.nlm.nih.gov/cgi-bin/sis/search/f?./temp/~V8m6v1:5>)

One other thing worth noting is that most premixed etching-grade FeCl has
hydrochloric acid added - it's used as an anti-sludging agent IIRC.
  
Anyway, I'm using a 3-litre (IIRC) polypropylene cereal container as an etch
tank. There's a bubbler Araldited into the bottom and an aquarium heater
fitted to one side. I had loads of trouble with "Combi Heater" branded
heaters breaking - three DOA, 100% failure rate. I've got a Visi-Therm now,
which seems to be OK. It's only 25W though; in hindsight I should probably
have bought something a bit bigger.
  
Word of warning: test the heater in water first. I doubt you'd get a
replacement heater if you tried to take back a dead heater that was covered
in FeCl stains :)
  
Later.
-- 
Phil.                              | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
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... A closed mouth gathers no feet
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