Its not new, but for those who like to know what I did....
I put a small amount of glass on the rod allow the glow to go off slightly, dip in the baking soda, "burn" off most of it until it seems none is left.
Next encase one layer of glass and you see how it creates a reaction, don't let all the bubbles pop, but try and get a smooth ball again.
Allow the bead to cool a bit and encase with another layer of glass. You can heat it quite a lot and see more developement of the bubbles, but don't allow them to come to the surface.
Have fun
Astrid
