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madder
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madder
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Dyers had used some natural dyes, such as madder and indigo, for thousands of years.
Although the pigments were the same, ranging from costly exotic ultramarine to local vegetable dyes such as madder and indigo, a radical change of technique was needed when they were mixed with egg-white or plant-gum rather than oil.
The same options were available for dyeing the wool or cotton, which could be accomplished by professionals or achieved at home using dyes such as madder , cochineal, and indigo.
In 1868 the German chemists Carl Graebe and Carl Liebermann synthesized the alizarin molecule, which is responsible for the red colour of the dye extracted from the root of the madder plant.
Threads for the work have been dyed in authentic colours of the period, using natural dyes some of which have been derived from plants like cow parsley, madder and walnut tree, picked locally by society volunteers.
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