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Ok, 1) I'll try a few lines of non-biocompatible bare ink, on a sheet of pig skin (often used for tattoo training and practice due to similarity with human skin), 2)"passing an audio signal/ multimeter over it", 3)magnet. I'll try 5cm long lines at 2mm, 4mm and 8mm in width.
But, I don't think we'll get much out of it until I can do this with bio-c ink... Will get bare paint and report back with results:::::::
"Many conductive ink applications incorporate silver nanospheres or nanowires to induce conductivity, although unfortunately we currently have limited measurement data on our particles’ conductivity. As far as a bio-safe application for tattoos, I should note that silver particles are known to have some toxicological effects when ingested or applied topically. This is currently a very active topic for research, so we’re not in a position to evaluate or make any claims on safety for use in humans at this time."