Mordant

:For the type of musical ornament mordent (note the different spelling), see Ornament

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A mordant is a substance used to set dyes. A mordant is either inherently colloidal or produces colloids and can be either acidic or basic.

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Mordants include tannic acid, alum, chrome alum, and certain salts of aluminum, chromium, copper, iron, iodine, potassium, and tin.

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Dye: A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied. The dye is usually used as an aqueous solution, and may require a mordant to improve the fastness of the dye on the fibre. In contrast, a pigment generally has no affinity fo...

Colloid: In general, a colloid or colloidal dispersion is a two-phase system of matter; a type of mixture intermediate between homogeneous mixtures and heterogeneous mixtures....

Basic: The acronym BASIC, depending on context, may stand for:...