today on Hackaday:
http://hackaday.com/2012/02/24/diy-conductive-ink-lets-you-freehand-circuits-on-the-cheap/..
[Jordan] likes the flexibility that conductive inks offer when putting
together electronic circuits, but says that they are often too
expensive to purchase in decent quantities, and that they usually
require substrate-damaging temperatures to cure. After reading a UIUC
Materials Research Lab article about making conductive ink that
anneals at relatively low temperatures, he decided to give it a shot.
...