Bubble powder is used between glass sheets to make bubbles during the glass fusing process.
Available in a range of colors it is simply sprinkled or spooned in between fusing glass and then fused to create bubbles.
It comes in a fine and coarse grade; the fine grade will make larger bubbles than the coarser grade. The grades can be mixed together to produce varying design elements.
This material is compatible with float, Bullseye and Spectrum glasses.
The results can vary quite markedly; sometimes a large blister will form and may actually weaken the strength of the item if it is too near the surface. The reverse can occur and you will find many small bubbles and areas where no bubbles have formed.