How do I date an 18th century wine glass?

Dating relies on the changing fashions of bowl shapes, stem formations and foot styles across the Georgian period. Early heavy balusters give way to lighter air twists and opaque twists as the decades progress. Changes in glass chemistry, such as the introduction of dense lead crystal, also help narrow down the decade of production when combined with stylistic evidence.

What is the difference between air twist and opaque twist?

Air twists contain spiralling threads of trapped air inside the clear glass stem. Opaque twists incorporate fine threads of white enamel glass drawn into the stem structure. Both techniques required immense skill from the glassblower to maintain an even, regular spiral from top to bottom.

Why do some glasses have folded feet?

Makers folded the edge of the foot underneath to add structural strength to a vulnerable part of the drinking vessel. This practice was especially common on heavier early baluster forms. Finding a folded foot often indicates an earlier production date within the eighteenth century.

Can I use these antique glasses for drinking?

These glasses are delicate historic artefacts that require careful handling and hand washing. While they were originally made for dining, most collectors choose to display them rather than use them daily. Thermal shock and modern dishwashers will damage the fragile historic lead glass beyond repair.