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Dyes

References for the investigation of mild extraction techniques

Traditional extraction methods of paint samples or textile samples for chromatographic analysis are often too aggressive. Often, not only fragile colours (dyestuffs) like carrotenoids (present in for example; annatto seeds and safflower floss) are destroyed during the extraction. Likewise coloured sugars could be lost or even transformed into another new molecule. Preserving these sugars by using a soft extraction technique could be extremely useful as the sugars could provide information about the original botanical or biological source, also provide information about how the dye or pigment was prepared or something about the environment in which the plant or insect/mollusk source existed.

DHA 29 | Lisbon

      This year the 29th ‘Dyes in History and Archeology Meeting‘ was organized by the department of Conservation and Restoration Centre for …