I came across this link via Boing Boing, Conductive Silver Ink from a Ballpoint Pen http://www.youtube.com/watch?feature=player_detailpage&v=dfNByi-rrO4 showing the ingredients and how to make it. The ingredients look to be commonly available, http://www.youtube.com/watch?feature=player_detailpage&v=dfNByi-rrO4#t=95s Baxter
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Conductive Silver Ink from a Ballpoint Pen
2011-10-20 by bebx2000