Tower of dye bottles, 1999.
© Science Museum / Science & Society Picture Library
A tower of late 19th-century and early 20th-century synthetic dye bottles on display in the Chemical Industry Gallery at the Science Museum, London, in September 1999. Organic colours made from plants and insects are commonly used in dying and staining proceses. First the dyestuff must be extracted from the plant, and then fixed to a material.