Penn State engineers have developed a paint-on electronic tattoo made from conductive ink. How the paint-on electronic tattoo worksResearchers created the ink by mixing several polymers and acidic additives into a water-based solution. Could an electronic tattoo spot a heart attack? The paint-on electronic tattoo gives the wearer more control over its appearance. What this means to youYou will not find a bottle of electronic tattoo ink at your pharmacy anytime soon.