how to promote very tiny bubbles in glaze?

updated thu 1 apr 04

Marianne Lombardo on wed 31 mar 04

I saw a glaze once, that had lovely tiny, tiny bubbles under the =
surface. The surface was glossy and very smooth, no pinholes. But =
beautiful very tiny bubbles were underneath.

I would like to do some experimenting to try and achieve this. Can =
anyone point me in the right direction and suggest what ingredient might =
cause the bubbles to form?

Thanks!

Marianne