The incalmo technique was developed by Venetian master glassblowers approximately 500 years ago and has traditionally been used to create horizontal bands of color in blown glass. It involves making "cups" of colored glass which are connected together. Steps 1 through 5 of the sketch below illustrate the process of making and assembling the cups. Step 6 shows a variation of the technique, known as reverse incalmo. It involves piercing a hole on the side of the assembled cups and attaching them to another blow pipe. The artist then gathers more glass and forms the piece into the desired shape. Incalmo is a technically complex and physically demanding technique to use. An artist must be a proficient glass blower and dedicated to the process in order to master it.
Chiarizia has adapted the reverse incalmo technique
to create vertical and diagonal bands of color in his work. His innovative
use of a traditional process results in designs that are quite unique.
With the addition of vibrant colors, the artist creates a body of work
with strong visual impact.