[hackerspaces] Fwd: Copper Through hole plating

[Andrew Frazer]

Begin forwarded message:

> From: Andrew Frazer <andrew.frazer at stellascapes.com>
> Subject: Re: [hackerspaces] Copper Through hole plating
> Date: 11 December 2012 8:33:10 PM NZDT
> To: Hackerspaces General Discussion List <discuss at lists.hackerspaces.org>
> 
> 
> Thanks for the quick response!
>> 
>> Its a very small amount.. in the neighborhood of 10~50ppm.
>> 
>>> (b) Can anyone make a suggestion as to where i can purchase Janus Green B
>>> 
>> 
>> Its normally very expensive.. but it seems to be on sale at our local supplier.
>> https://www.spectrumchemical.com/OA_HTML/chemical-products_Janus-Green-B_JA110.jsp?minisite=10020&respid=22372
> 
> I've found another  supplier on line, 5g is about $22, so, that sounds pretty good.   I don't' need much, so a little bit is going to go a long way.
> 
>> 
>> The solution works very well the first couple of times, but I had
>> issues with trying to keep the solution working properly over an
>> extended period.  I should probably have taken a pH reading when I
>> started and tried to get the solution to stay at that level.
> 
> Do you have any idea of what might cause the system to stop working?    I'm going to be operating with about 30L of solution, so, hopefully thats going to help me in terms of getting a bit more life out of it.    If there was some PH variation how would you go about adjusting it?  
> 
> 
> 
> I'm in LA quite regularly ( was there two weeks ago ) and if the chance comes up i'd love to come and visit NSL,   we sort of have something similar, though it seems you're a whole lot more organised than us!
> 

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