The goal of this experiment was to try to find an alternative to commercially available conductive paint. It is incredible stuff but expensive. I've read other Instructables like Makerboat's $1 Conductive Ink and IceCats' Paper Electronics. They helped me arrive at my own recipe, which uses only two ingredients but I think my testing is more reliable.
To make the winning recipe you need:
To complete every test you need:
*Be careful with graphite powder because inhalation can lead to respiratory problems.
For the first recipe graphite powder was mixed with Elmer's Glue-All until the consistency was spreadable. Be careful when adding the glue because squeezing the bottle will shoot a blast of air into the jar and graphite powder will blow everywhere. The third picture illustrates this.
The ratio was:
The result was fluid but very thick. It could still be used as an adhesive.
Two lines were drawn with the toothpick. One thin line and one thick line. The toothpick was wiped off on the side of the jar and allowed to dry next to the lines.