mordant


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Related to mordant: Mordant Dye

mordant

(môr`dənt) [Fr.,=biting], substance used in dyeing to fix certain dyes (mordant dyes) in cloth. Either the mordant (if it is colloidal) or a colloid produced by the mordant adheres to the fiber, attracting and fixing the colloidal mordant dye (see colloidcolloid
[Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also called a colloidal system, colloidal solution, or colloidal dispersion.
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); the insoluble, colored precipitate that is formed is called a lakelake,
in dyeing, an insoluble pigment formed by the reaction between an organic dye and a mordant. The color of a lake depends upon the mordant as well as the dye used. Generally, lakes are not as colorfast as many inorganic dyes, but their colors are more brilliant.
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. The chemical compounds used as mordants are either acidic or basic. Acid mordants (e.g., tannic acid) are employed with basic dyes; basic mordants (e.g., alum, chrome alum, and certain salts of aluminum, chromium, copper, iron, potassium, and tin) are employed with acid dyes. Cloth to be dyed may be treated first with the mordant and then with the dye, or the mordant and dye may be applied together. The vividness of certain dyes that ordinarily do not require the use of a mordant may be markedly increased when one is employed.

mordant

[′mȯrd·ənt]
(chemistry)
An agent, such as alum, phenol, or aniline, that fixes dyes to tissues, cells, textiles, and other materials by combining with the dye to form an insoluble compound. Also known as dye mordant.
References in periodicals archive ?
Dyeing is such a beautiful way to see nature and chemistry in action--the difference the nature of fibers makes; the difference a bit of metal mordant makes; the way some dyes strike enthusiastically but others need overnight soaking.
Moyo, "Mango bark mordant for dyeing cotton with natural dye: fully eco-friendly natural dyeing," International Journal of Textile Science, vol.
After fermentation madder roots and mordant are added to the suspension at ambient conditions.
Employing similar natural dye and mordant, the comparatively higher values of K/S in the present study (1.92) clearly indicate that dyeing procedure was the only factor responsible for this greater colour yield.
Lastly, and most importantly, neither M Mordant nor anyone else ever need remind me of the great sacrifices made by my countrymen and women in two world wars.
Myrobalan is also used for dyeing; its yellow colour is due to the tannins but also to flavonoid colorants (mostly 3'-methoxy quercetin and 3',4'-dimethoxy quercetin), (6) and its hydrolysable tannins combine with iron mordant to give black.
A mon avis, cette circonstance s'explique exclusivement, par la facon que le mordant s'applique a la plaque de metal.
If the ngar is not a mordant, then what is it and what is it for?
Gary Lutz, chronicler of unwonderful and morosely moored persons, continues to tickle darkly in Divorcer ("Friends don't let friends stay friends"), which concerns the supreme act of breaking off: "Divorce, I kept forgetting, is not the opposite of marriage; it's the opposite of wedding." This collection features four long stories and three shorter, with the titles of the four serving as the perfect settee for his mordant gnosis: "Divorcer," "To Whom Might I Have Concerned?", "I Have to Feel Halved," and "Womanesque." In each of these stories the unnamed narrator is wounded, balling himself into the bland efficiencies he shares with a flighty, sexually etiolated female (in one case male).
Based on Joe Dunthorne's novel and laced with mordant wit, Submarine is a hysterical coming of age story set in windswept Swansea.
Mikael Hafstrom's plodding film is enlivened sporadically by scenerychewing from Sir Anthony Hopkins, embracing his dark side with flashes of mordant humour in scenes that recall his signature role as Hannibal Lecter.
The Victorian Lady was Elinor Mordant although for her book On The Wallaby she used the name E.M Clowes (Clowes being her maiden name).