Dye
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A dye is a colored substance that is soluble in some solvent; by contrast pigments are insoluble or nearly so in all solvents. Because of their solubility, dyes can chemically bind to the material the
Dyes made at De Kat, Zaandam
Dyeing wool cloth, 1482: from a French translation of Bartolomaeus Anglicus
Drying colored cloth
Shelf with various hair dyes in a hairdresser shop
Mordant
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A mordant or dye fixative is a substance used to set dyes on fabrics. It does this by forming a coordination complex with the dye, which then attaches to the fabric. It may be used for dyeing fabrics
Dye
…Because of their solubility, dyes can chemically bind to the material they color. Dye is generally applied in an aqueous solution and may require a mordant to improve the fastness of the dye on the fiber. The majority of natural dyes are derived from non-animal sources such as roots, berries, bark, leaves…
A French Indienne, a printed or painted textile in the manner of Indian productions, which used mordants to fix the dyes
Dye rot from iron mordant
Teinture naturelle Millepertuis 2