Well the clay bowl's are already acceptable for use, as well they have the coal currently directly placed onto a metal grate on top of the bowl, so heat transmission is not an issue.
Although you're right about the food grade info for the wire, the wire itself isn't going into the bowl, it's...
thanks, basically what we're trying to do is create a coal-free hookah. We're looking at ways of creating a simple heating system for our tobacco. To see what we're talking about go to www.hookah-shisha.com and you'll see what kind of set up we're looking to build.
Basically, what we're looking to construct is a very small heating apparatus.
We need to find an appropriate material to heat 28.26 cm sq., to roughly 150C or 423 K. We would prefer to use a battery mounted system but are equally ok with making some sort of plug-in system.
We're not...