Fact No. 307. (Published on 11/20/2005)


"The process of pricking molten glass with a tool that leaves small, air-filled hollows. When the glass is covered with a second gather, the hollows become air traps."

- The Corning Museum of Glass Glass Glossary

(The term probably originated with the first glass blower who learned they could achieve his technique using a cobbler's pegging awl.)

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