Conductive ink will make paper talk
It would replace wires, circuit boards, batteries
Don't worry. This isn't about getting a shock off a printed page. Rather, its about making electronics cheaper at a fraction of a cent by replacing wires, circuit boards and batteries with ink.
A small, New York-based outfit called T-Ink Inc. is pioneering the use of electrically conductive ink in ordinary printing presses.
"Our goal is a total print medium where your paper is going to talk," says Andrew Ferber, vice chairman at T-Ink and one of the brains behind the technology. He envisions newspapers that include printed loudspeakers, batteries and circuits.
For now, the technology is available in limited form and in somewhat trivial applications.
Conductive ink was used to print circuits on tray mats for Australian McDonald's. A light on a toy that came with meals lit up if it followed a maze-like circuit on the mat. Also out from T-Ink is an inflatable radio with printed controls as well as a Clue game board that senses where the pieces are and plays sound effects such as the sound of feet on gravel for someone near the stables.
Among other projects being considered: diapers with built-in wetness sensors, drug packaging for the elderly that reads the prescription out loud when touched, light switches painted onto walls and clear security sensors painted onto windows.
The company is starting much of its early efforts on toys and promotions "you might call them the low-hanging fruit for us," Ferber said.
Toys are designed and made quickly, while launching an industrial product can take five years. T-Ink also has the connections, formed two years ago by toy design and TV production group Abrams Gentile Group LLC and Ferber's outfit Colortronics. Not surprisingly, the privately held company's office in midtown Manhattan is stacked with enough toys to make any kid giddy.
T-Ink's use of conductive inks is innovative, but the basic idea isn't new. Engineers use pens with silver ink to improvise or repair circuits on circuit boards, for instance. And underneath the keys of computer keyboards are membranes with printed circuits that sense when a key is pressed. Windshield defrosters are also printed.
But those applications are mostly screen-printed, a slow and expensive process used because it leaves a thick layer of ink, much like the ink on an embossed business card. With new inks, offset printing and other faster technologies can be used as well.
Ferber is coy about the composition of the inks but said T-Ink has moved beyond the materials used to make traditional conductive ink particles of silver and carbon. T-Ink's patent applications describe using various mineral powders and some conductive plastics. The inks can come in any color and can be washable, too.
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