Sheffield replicates Roman colour-changing glass — SkimNews
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- University of Sheffield scientists replicated the Lycurgus Cup’s dichroic glass using an ancient recipe and modern analysis, embedding gold and silver nanoparticles into molten glass to achieve its color-shifting effect.
- Dr Lisa Hollands described the replication process as a 'labour of love' and demonstrated how the nanoparticles block blue and green light when lit from behind, allowing only reds and oranges to pass through.
- Elliot Walker, a glass artist commissioned by Sheffield, created a contemporary sculpture inspired by the Lycurgus Cup and the Farnese Atlas, which will be displayed at the Millennium Gallery and later at the Turner Museum of Glass.
- Ian Freestone, emeritus professor at University College London, confirmed the project’s precision surpasses a 1960s attempt, noting the color’s sensitivity to furnace conditions suggests the Romans may have 'hit the jackpot' in their original creation.
- The Lycurgus Cup, a 4th-century Roman artifact in the British Museum, changes from jade green to ruby red depending on light direction and depicts King Lycurgus entangled in a vine, symbolizing Dionysus’s triumph.
- A letter attributed to Emperor Hadrian mentions sending 'parti-coloured cups that change colour' as gifts for use in banquets, suggesting such glass had ceremonial significance tied to wine and ritual.
Why it matters: This precise replication reveals how sensitive the Roman glassmaking process was to furnace conditions, suggesting the original Lycurgus Cup may have been a rare success amid inconsistent results—offering archaeologists and materials scientists a tangible model to study ancient craftsmanship and nanoparticle control in pre-industrial contexts.
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