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Subject: Re: [Homebrew_PCBs] Re: Etch safe materials for etch tank

From: Philip Pemberton <philpem@...>
Date: 2004-12-13

In message <opsir6p1wrmg0lsf@...>
"Stefan Trethan" <stefan_trethan@...> wrote:

> I have solutions for both problems:
> Mist: put the inlet of your pump in the tank too. Make sure the pump is
> made completely of plastic/rubber.
> This causes the mist to be recycled and not expelled.

Not gonna happen - it's an aquarium air pump.
That and the mist doesn't seem to be mist at all - it's more like droplets of
FeCl3 condensing on the inside of the tank lid.

> Losses: Don't empty your tank. i leave the etchant in all the time, but i
> have a homebrew tank.

Probably not a good idea around here. Things tend to get tipped and bumped
quite a lot and the idea of having to clean up the mess caused by three
litres of heated, concentrated FeCl doesn't appeal to me.

Later.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem@... | ViewFinder, 10BaseT Ethernet, 2-slice,
http://www.philpem.me.uk/ | 48xCD, ARCINv6c IDE, SCSI
... James Dean taught Marc Bolan to drive.