Homebrew PCBs

Stefan Trethan wrote:

>One thing that stood out is that this paint did coat the copper very well  
>indeed. No beading up or pulling together at all, and i only did my usual  
>prep (brief sand with 1000grit and wipe with alcohol).
>
>  
>

  This part really begs the question for what about the yellow is making 
it work.  The gallon looks tremendously cheap in comparison to the small 
amounts too, if everything works out I may get one and split it up.  
Even if it's the pigment itself, and the pigment properties are hard to 
find in something else, the pigment may be far cheaper once we locate a 
source.  Should work fine to add it to another ink or simply make our own..

Alan