I’ve been looking into the capabilities of clay, power of which are of interest to me. Firstly the water in clay can make it conductive to electricity, and over time as the clay dries the current tapers off.
Also certain materials can be mixed into clay to make it magnetic. I found an few artist and blog who are working in this manner.
Compatable handbuilding body
H.M.E Casting Slip 6-10
Neph Sy 23
Silica 325m 22
Sodium Silicate 100 grams
5-6 gallons of water
(I mix ½ a bag ½ a bag whole bag, I heart easy)
Add 10% Iron Oxide Should result in a gray clay body once fired to Cone 04