On Jan 6, 6:52*am, Wayne Boatwright >
wrote:
> Can a Pyrex double boiler be used in direct contact with a ceramic
> glass cooktop without the use of a wire diffuser?
>
> TIA

Judging by this article on eHow, the answer is No.

http://www.ehow.com/info_12045341_ca...c-cooktop.html

I hope that helps
Boris
http://www.stuffwereviewed.com