Fact No. 238. (Published on 9/11/2005)

Air twists

A glass blowing technique in which "ribbons" of air spiral through the glass -- most often in the stem of a goblet.

The technique is achieved by pressing small metal spikes into the base of the parison so that when the glass is pulled the voids – thus bubbles – created by the spikes are elongated. Twisting the glass as it is pulled causes these "ribbons" to spiral around each other.

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