On Saturday, November 8, 2014 11:07:34 AM UTC-5, pltrgyst wrote:
> As Boron said, avoid the older pieces with the smoke rings, intended for
> use on gas burners,

OK, I have to ask, why? As long as the cast iron is close enough to the surface to have the magnetic field induce eddy currents it should work, have you had some problem or is this just some FUD over a newfangled thing? According to everyone 20 years ago when I bought a house with a glass cooktop I would scratch or damage it by using cast iron pans. Well, the separate oven died 6 or 7 years ago, but that glass top is still fine and I use cast iron all the time.

So, what problem would using a cast iron pan with a rim on the bottom cause?

Bill Ranck
Blacksburg, VA