The madder or dyer's madder or rubia or dyer's root (Rubia tinctorum) is a plant with strong properties.
Madder was particularly useful in the past because a red dye, suitable for dyeing yarns, is produced from its root. In Ampelakia, Larissa, the first agricultural cooperative was established in the 18th century, which dealt with dyeing yarns from madder, which conquered the European markets. The dye derived from madder has alizarin as its main component.
It is boiled in water and used for dyeing yarns and fabrics. Vinegar and salt are also used in the mixture, as they help fix the dye.