Incalmo

This is an ancient glass-making technique to make objects, consisiting of distinct parts joined after heat. Two or more elements of different colours are prepared by modelling them into the overall shape. They are then joined together very accurately and finished as desired. If necessary, the operation can be repeated over and over. This system requires uncommon technical mastery on the part of the glassblower, but outstandingly beautiful objects have been created, such as those by Thomas Stearns for Venini & C. in the early 60s.