Somark Innovations announced biocompatible RFID (Radio Frequency Identification) ink, which can be used to tattoo cattle and laboratory rats and can be read through animal hair.
It might even be used on humans eventually.
This is a passive RFID technology that contains no metals; the tattoos themselves can be colored or invisible.
The Somark ID System creates a "biocompatible ink tatoo with chipless RFID functionality."
The RFID ink tatoo does not require line of sight to be read, as is the case with other RFID devices (making them better than a barcode for some applications).
RFID ink tattoos also solve the annoying problem of ear tag retention. Conventional RFID ear tags sell for about $2.25; about 60-90 percent of them eventually fall off. Also, Somark claims that the biocompatible RFID ink system will improve readability rates as well.
Somark Innovations co-founder Mark Pydynowski noted that the RFID ink is fully biocompatible and was safe for use in humans. He noted that RFID ink tattoos could be used to track and rescue soldiers. "It could help identify friends or foes, prevent friendly fire, and help save soldiers' lives," Pydynowski said.
This technology reminds me of Jack Vance's spray-on conductive wire; it also makes you think about the other possibilities that having an ink that can be used to create a functioning circuit. You don't need to tattoo it; you could print it onto flexible surfaces, like the sleeve watch from the 1981 novel Dream Park.
(This Science Fiction in the News story used with permission from Technovelgy.com - where science meets fiction.)