As you can see, my technique has not much improved since my last lampwork post. I have only managed to incorporate more colors, which when applied in a not-very-controlled manner, results in swirling messes. They are works of abstract art, of course!
Last week I learned the technique of bubble-trapping. When the bead is hot but allowed to cool just somewhat, use a cold, pointy metal tool to poke at the surface. Then melt clear glass over the holes. A bead in the background (the one with bumps, yes I should have photographed this with that in the foreground, oh well) has been subject to bubble trapping.