[hackerspaces] Copper Through hole plating

B F bakmthiscl at gmail.com
Wed Dec 12 15:40:10 CET 2012

I am a chemist, with limited experience in pickling and etching.  As
such, I don't see what the green dye was for in the formula.  Does it
play any active role?

On Tue, Dec 11, 2012 at 1:54 AM, M <dblmca at gmail.com> wrote:
> On Mon, Dec 10, 2012 at 10:25 PM, Andrew Frazer
> <andrew.frazer at stellascapes.com> wrote:
>> Hi NSL folks from New Zealand..
>> I was interested to see in your wiki, your THrough hole plating project   ( http://wiki.032.la/nsl/Through_hole_plating ).   I was wondering if anyone could help me with two questions?
>> (a) In your project you've Janus Green B as a brightener.  I can't find any reference to how much to use
> 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
> 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.
> A couple of months ago we decided to get a commercial machine.  It
> didnt come with chemicals or anodes... so we will be hackerspacing the
> materials for this new rig pretty soon.
> http://www.flickr.com/photos/nullspacelabs/8096189458/
> Cheers,
>  -M
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