The lampworking group I am a member of, Silicon Valley Fireflies, recently traveled to Public Glass in San Francisco to see glassblower David Patchen at work. He made some murrine and a vase. It was fascinating to watch.
David’s first step in making murrine was to make a variety of glass cane. Cane are colored lengths of glass made by stretching molten glass into a long rod (15 to 50 feet). Cane can be a simple stripe of color or fine woven-looking threads. According to David: “Murrine is made by precisely layering molten colored glass, then stretching the mass into a long rod. Once cooled overnight, the rod is cut into slices, exposing the pattern in cross section, kind of like a glass sushi roll. ”
Here is David making murrine.
David’s assistant, Ian, has the cane ready to be rolled around the murrine.
He rolls and tapers it to get out all the air bubbles.
The murrine is being pulled.
Once it has been pulled enough David inserts it into a wooden box, cutting it into pieces.
The murrine is slice with a saw. Here is an example:
According to David, “Pieces are designed by creating a mosaic of murrine & cane (cold). Once complete it’s then heated for blowing.”
David’s pieces are very beautiful and fetch high prices in galleries.