Homebrew PCBs

I bought some white ABS sheet and ABS #2354 solvent from Tap Plastics and made a small ~12x10x2" tank, partly heat formed and partly
solvent glued. I use, and have stored CuCl in it for about 3 months so far, with no issues.

Roger

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of Stefan Trethan
Sent: Sunday, April 25, 2010 11:46
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] CuCl Tank and silicone

 

  

Slowly but surely I get the impression silicone is just not suitable
to make CuCl tanks with.
The current one has held some years, but finally sprung a leak as well.

I was quite pleased when, after not making a board for many months, I
held a perfect toner transfer in hand within 5 minutes.
However I was less pleased when I lifted the dust cover off my tank,
and discovered it had leaked. Luckily it is positioned in a large
plastic box which contained the etchant just fine. Must have been a
while too, since the tank holds over 2 liters and I recovered well
less than one.

I've had a number of tank leaks now, which leads me to believe that no
matter how wide the seams are the CuCl will eventually crawl out under
the silicone.

I need homemade boards so infrequently now I'm not sure if I will even
make a new tank just yet, but it would not be sealed with silicone.

Are there any alternatives to welded plastic if one wants a narrow
shape and dimensions that can't be found in any existing tank?
Anyone tried two component epoxy? On glass? Some other glue?

ST





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