The Christies Glossary defines Primavera Glass as:
"Glass with a crackled translucent body created by dipping the glass in a specific chemical that produces a delicate netting and random air bubble effect; the glass is then decorated with bold black applications."
Though similar techniques are used today – and often called by the same name – many serious glass historians consider the specific original technique to be lost with the Italian master Ercole Barovier (1889-1974) who invented it circa 1930.
