Mica as backing for plique

How do you get it off? I’ve tried stoning, etc. It seems to leave a
dull finish.

I always used sheets of mica as backing for firing plaque de jour. 

It’s “plique-a-jour.”

“Plaque de jour” would be something the dentist scrapes off your

Elliot Nesterman

Belinda- If you are enameling in a kiln, it should just peel off. If
it’s dull after stoning just wet polish it with tin or zinc oxide.
You can also just fire polish it.

Jo Haemer