I wanted to add nature through real plant images to my fused glass. I use Bullseye Glass. 90COE. I started by putting ferns between glass and fused the glass. One plate had a 1/4' piece of glass on top. I thought the weight might help eliminate the bubbles. Both had bubbles. The only one that did not used a small plate of two pieces of glass. I like the bubbles but the piece can not be refired so I will think of a way to use them.