I've always used a mega bubble tank so I have no comparison to make. I
just change the bath when the etch times start to rise. The made up
solution is supposed to have a life of about 1 - 2 months and the
crystals over a year. But I wonder if that is for commercial
manufacturing rather than hobbist?
Grahame
PS Nick, VFDs arrived all safe and sound, thanks, G
On 21/03/2013 07:17, Nick wrote:
I've switched to Sodium Persulfate rather than FeCl for much the same
reason - much cleaner and less toxic.
However, I have a Mega Electronics bubble tank and when I asked their
technical support about its safety in a tank designed for FeCl, they
said that the aeration would shorten the life of the etchant solution...
I'm NOT a chemist, so what's your verdict on that statement?
Cheers
Nick (t'other one)
On Wednesday, 20 March 2013 22:14:00 UTC, Grahame Marsh wrote:
Hey, no offense taken, one of the nice things about this list is
the broad range of interests and skills that exist - not just
electronics
None of the chemicals are particulary hazardous, but I would echo
the suggestion of NOT using FeCl3 - I had an accident once and
SHMBO was, shall we say, unimpressed. If you use FeCl3 then get
some oxalic acid as well to clean up after...
:)
Grahame
On 20/03/2013 22:08, Nicholas Stock wrote:
No offense intended Grahame! I'm an Organic Chemist, so I know a
few things about chemicals too..;-)
Thanks for the link, I'll be sure to check it out, just not
familiar with the whole process and thought I'd ask 'those in the
know'
Cheers,
Nick
On Wed, Mar 20, 2013 at 1:47 PM, Grahame Marsh
<graham...@googlemail.com <javascript:>> wrote:
Well.... I'm a chemical engineer so should I be better with
the process & chemicals?
This is a link to my top dozen home made PCB tips
https://groups.google.com/d/msg/neonixie-l/jUUlqV-avvM/4JgBIFcBBtEJ
<https://groups.google.com/d/msg/neonixie-l/jUUlqV-avvM/4JgBIFcBBtEJ>
You can see my results on my electronics webpages
http://www.sgitheach.org.uk/electronics.html
<http://www.sgitheach.org.uk/electronics.html>
Good luck Grahame
On 20/03/2013 19:05, Nicholas Stock wrote:
I'd like to be able to make some of my own PCB's using
the toner transfer method. Can anyone recommend a good
starting product/kit that they like? Any tips, tricks to
help a newbie get started?
Thanks in advance...
Cheers,
Nick
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