Mechanism of traditional Bogolan dyeing technique with clay on cotton fabric

• Bogolan is a traditional dyeing technique deeply rooted in Mali It uses local clays from Niger River region and a leave extract from N galama trees (Anogeissus leiocarpa) The clay contains a significant amount of iron (hydr)oxides mainly akaganeite It reacts with N galama coating onto cotton to form black or brown colors UV/Vis and IR spectroscopy indicated very similar behavior of N galama leaves extract and carboxylic aromatic acids mainly ellagic or gallic acids which form dark colored complexes with iron Since iron (hydr) oxides are coated on clay mineral particles they contribute to the fixation of the Clay mineral particles and also cause the dark color X-ray diffraction of oriented tissue and SEM observations confirmed the presence of clay particles attached on the fiber surface.

Nyckelord

Clay

Dye

Coton

Bogolan

Mali

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