I have noticed that nichrome is a common resistance wire used for various heating purposes. I have seen it used inside what seem like glass tubes (like on an electric stove) and just floating in coils (like in hair dryers), but how would it be made in a sheet form?
The problem is that it is not insulated, which means that if it touches another piece of metal, the current would flow through that metal rather than the nichrome.
You would want the material it is wrapped in to be thermally conductive, but not electrically.
I've seen designs like this which put an insulator around the nichrome, but I don't see how that is effective at distributing the heat produced by the nichrome.
I am trying to achieve an even as possible distribution of heat at about 150C. My power supply is going to be a 12V supply that can do up to 15A (so current is not much of an issue here).