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In 1775, Swedish chemist Karl Scheele developed an emerald green pigment which became known as 'Scheele's Green'. In the nineteenth century, paint manufacturers aimed to improve on this pigment, and 'Paris Green' was invented. By the middle of the century, emerald green was the height of fashion, and these pigments were used in a great number of manufactured items, including wallpaper, clothing, children's toys, ornaments, and even confectionery. The problem was that this pigment contained arsenic.
The reason that this is relevant for the DEI, and for historic libraries more generally, is that arsenic was also used in book production, to create emerald green cloth and paper. Through this book display, we explore the dark secret of this vibrant colour, and its use in our book collections.
| Ticket Type | Ticket Tariff |
|---|---|
| Standard | Free |
Note: Prices are a guide only and may change on a daily basis.
| 01/09/2026 - 31/10/2026 (1 Sept 2026 - 31 Oct 2026) |
|---|
* Times vary
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Discover Exeter’s urban nature trail: the Green Circle, a 12-mile circular walking route that connects diverse neighbourhoods, leafy suburbs, and hidden heritage
Summer has well and truly arrived in Exeter, and come rain or shine there's lots going on across our city to keep everyone entertained.
Exeter became the only UK destination in 2019 to be awarded UNESCO City of Literature status, recognised for its 1,000 year unbroken history of making books and popularising reading since the early 13th century.
Read the latest blogs here, including guest articles and top tips from locals!
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