Hackaday (unofficial) August 1, 2024 9:00am Secret Messages On Plastic, Just Add Tesla Coil #highvoltage #science #coronatreatment #hydroglyphics #hydrophilic #hydrophobic #teslacoil #hackaday posted by pod_feeder_v2 Secret Messages On Plastic, Just Add Tesla Coil Here’s a short research paper from 2013 that explains how to create “hydroglyphics”, or writing with selecting surface wetting. In it, an apparently normal-looking petri dish is t…