Dye

A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber.

Both dyes and pigments appear to be coloured because they absorb some wavelengths of light more than others. In contrast with a dye, a pigment generally is insoluble, and has no affinity for the substrate. Some dyes can be precipitated with an inert salt to produce a lake pigment, and based on the salt used they could be aluminum lake, calcium lake or barium lake pigments.

Dyed flax fibers have been found in the Republic of Georgia dated back in a prehistoric cave to 36,000 BP. Archaeological evidence shows that, particularly in India and Phoenicia, dyeing has been widely carried out for over 5,000 years. The dyes were obtained from animal, vegetable or mineral origin, with none to very little processing. By far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale.

Read more about Dye:  Natural Dye, Synthetic Dye, Dye Types, Food Dyes, Other Important Dyes, Chemical Classification

Other articles related to "dye, dyes":

Dye - Chemical Classification
... By the nature of their chromophore, dyes are divided into CategoryAcridine dyes, derivates of acridine CategoryAnthraquinone dyes, derivates of anthraquinone Arylmethane dyes CategoryDiarylmethane dyes ...
Stain Removal - Hair Dye Stains
... Because of the length of time the hair dye must be on the hair to achieve deep, even results, it often seeps or drips down onto the hairline, ears or neck, causing unsightly and ... Dye users are not universally affected—some persons have a tendency to get stains while others do not—most likely due to the variations in lipid or natural ... creates a physical barrier to prevent the dye from running down onto the skin of the forehead and neck, and fills the pits and recesses within the epidermal layer ...
Sidney Dye
... Sidney Dye, JP ( 1900–9 December 1958) was a British Labour Party politician ... Born at Wells-next-the-Sea, Norfolk, Sidney Dye was educated at Wells Elementary School and Ruskin College, Oxford ... In 1955, Dye regained the seat with a majority of 193, securing Labour's only gain of that election ...
List Of Aircraft (D) - D - Dye
... (Elmer F Dye, Encanto CA) Dye Dart Sport. ...
Lipid Bilayer Characterization - Fluorescence Microscopy
... Natural lipids do not fluoresce, so it is always necessary to include a dye molecule in order to study lipid bilayers with fluorescence microscopy ... To some extent, the addition of the dye molecule always changes the system, and in some cases it can be difficult to say whether the observed effect is due to the lipids, the dye or ... The dye is usually attached either to a lipid or a molecule that closely resembles a lipid, but since the dye domain is relatively large it can alter the behavior of this other molecule ...

Famous quotes containing the word dye:

    It will help me nothing
    To plead mine innocence, for that dye is on me
    Which makes my whit’st part black.
    William Shakespeare (1564–1616)