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Comment by natch | Hacker News Reader

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.

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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.

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