Honeycomb, implosion, Reticello and more! this class is for experienced boro artists who want to take their art to the next level. Prerequisite: experience with boro beyond beginner level. Glass beads, marbles and sculptures are annealed in a kiln for long life. Finished pieces may be picked up the following day.If you are sensitive to dust and fumes, or if you have asthma or may be pregnant, check with your doctor and contact the studio for more information.