Rummer with raven seal [electronic resource] / Corning Museum of Glass.

Rummer with raven seal [electronic resource] / Corning Museum of Glass.
Corning, N.Y. : Corning Museum of Glass, 2011.
1 streaming video file (2 min.) : digital, sd., col.
Other Authors: 
Kerssenbrock-Krosigk, Dedo von.
Corning Museum of Glass.
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Streaming Video
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Mode of access: internet.
Narrator, Dedo von Kerssenbrock-Krosigk, former curator, The Corning Museum of Glass.
Former curator Dedo von Kerssenbrock-Krosigk describes this George Ravenscroft piece. In March 1674, the English glassmaker George Ravenscroft applied for a patent to make colorless lead glass. Unfortunately, this glass was prone to crizzling, a chemical instability that results in an attack by atmospheric moisture, producing a network of cracks in the surface. Ravenscroft revised his formula, adding more and more lead glass. This new lead formula was used to make this rare Ravenscroft goblet. The goblet is decorated with mold-blown ribbing that is pinched to form a mesh design on the bowl. This pattern is called "nipt-diamond-waies." One of the prunts at the bottom of the stem is stamped with a raven's head, taken from the Ravenscroft family's coat of arms.
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Object/Material Note: 
Related to CMoG object: 50.2.2.