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Subject: Re: [Homebrew_PCBs] CuCl etchant - an update

From: Sam Rod <mail4sam@...>
Date: 2013-09-07

Andy,
Their was no for me to know un less I did a stress test. 
I was hoping i would no have to build some elaborate heater so I chose
to submerge the heater un powered for an hour and then check the plastic fittings.

the fittings showed abso no wear or degradation. the final test was to test with heat. 
which I did several times. I will report though for me the heat did'nt seem to make 
any noticeable difference. That being said any further etches I have run with no heater installed 
less parts less chance of error.

Had it made some difference I might have even just bubbled the parts outdoors in the sun light.
Still not using the heater.
I mentioned earlier Im in Fl. their is no shortage of free heat here.


Last thing. In previous test I had many failures with alot of the plastic fittings. even wire ties.
they would dissolve 100%. I ended up redesigning so no wire ties are even needed 
and for the fittings I special ordered some PVDC based ones. All the other ones I tried failed.
including my drain elbow. 

Having a chem spill is the 2nd from the last thing one needs/wants.  In all of my research I find
it amazing not many people mention the incompatible plastic factor.
 
Ill add a close up video of the bubbler in action with some water and dye it truly works magnificent .

Sam



On Sep 6, 2013, at 9:24 PM, Andrew Volk <amvweb@...> wrote:

 

Sam –

 

Everything looks quite straightforward, except the heater.  It looks like it is completely immersed, cord and all, in the tank.  Am I seeing this right?  The heater is that water/etchant proof?

 

Andy

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of thesn1per
Sent: Friday, September 06, 2013 12:36 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: CuCl etchant - an update

 

 

All,
I posted up some pics of my tank broken down and assembled with and with out boards.
their are quite a few pics hard to take pics of clear plastic.

http://thesn1per.blogspot.com/2012/11/etching-tank-update-110812.html

Feel free to ask away but it should be pretty self evident.

Sam