Synthetic scarlet colorant, c 1900.
© Science Museum / Science & Society Picture Library
A jar of CroceInescarlet synthetic dye by Chemische Fabriken vormals Weiler ter Meer, Uerdingen-am-Rhein, Germany. The Croceine Scarlet dyes were azo dyes introduced by Bayer in 1881. Weiler ter Meer was founded by J. W. Weiler in 1861 and taken over by Edmund ter Meer in 1896. It became part of I.G. Farbenindustrie AG in 1925 and part of Farbenfabriken Bayer AG when it was refounded in 1951. Part of a collection of late nineteenth and early twentieth century colorants transferred from the Colour Museum, Bradford, in 1985.