Sundour unfadable colours advertisment, early 20th century.
© Science Museum / Science & Society Picture Library
Page from a leaflet advertising Sundour unfadable colours. Shown on the left are a selection of standard colours which have faded after three weeks of exposure. Shown on the right are a selection of Sundour colours which have not faded after 28 weeks of exposure. Sundour colours were based on BASF's Indanthrene dyes and were introduced by Scottish textile industrialist James Morton in 1905.