The one question I would like to know is: where can I get my hands on this kind of ink and what kind of printer does it require? Unfortunately, journalists don't think to delve into this kind of information.
Just google "conductive ink". I don't know of any printers that use conductive ink, but there is a variety of available pens with conductive ink that you can use to draw the circuits.
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The one question I would like to know is: where can I get my hands on this kind of ink and what kind of printer does it require? Unfortunately, journalists don't think to delve into this kind of information.
Try the Mitsubishi NBSIJ–MU01 conductive ink for inkjet printers. Available here: http://www.k-mpm.com/agnano/agnano_ink.html
MSR published a paper where they tried using this ink and wrote about their results: http://research.microsoft.com/pubs/201273/ubi1415-instant%20...
If you have access to a chem lab this video will show you how to make your own:
http://www.youtube.com/watch?v=dfNByi-rrO4
If you'd rather not make your own, you can purchase a pen full of that ink on their kickstarter page for $20 here (11 days left):
http://www.kickstarter.com/projects/electroninks/circuit-scr...
To answer the “what kind of printer does it require?” part of the question; Here's the Circuit Scribe pen being used in a pen plotter, in this case to draw an arduino-compatible circuit: http://www.instructables.com/id/Paperduino-20-with-Circuit-S...
Looks like you might be able to accomplish that with something like this
https://www.kickstarter.com/projects/electroninks/circuit-sc...
Just google "conductive ink". I don't know of any printers that use conductive ink, but there is a variety of available pens with conductive ink that you can use to draw the circuits.