Homebrew PCBs

Where is the video located where he uses the white ink?  Is the white ink
conductive?  


Jeff

>Malcolm wrote:

> does not answer the question as to how to protect the copper in the
> holes from the etch solution, 

He just repeat the same ink filling process (and surface scrubbing) with
is acrylic ink. There was another video with it, the ink was white (no
graphite in it). And he actually used toner transfer afterwards!! 





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