mordant

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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 ?
Ware develops his argument contrasting the standard reading of the Tractatus as somehow showing ineffable truths without strictly stating them--the philosopher Frank Ramsey famously remarked mordantly that Wittgenstein was trying to whistle what he officially denied could be said--with the austere or anti-metaphysical reading that has been developed in the past decade and a half by Cora Diamond and James Conant.
A mordantly funny look at outcast suburban kids and at the spiky, unpredictable power of adolescent female sexuality, Ginger Snaps douses its lycanthropic action in buckets of gore, but it's the drops of menstrual blood that feel truly taboo-busting.
has not raised rates as of yet," Merk mordantly notes.
It has the bouncy rhythm of a charabanc, mordantly witty lyrics, and, fittingly, its tempo is perfect for gently cruising past coaches on the M6 motorway.
It says much about his talent as a writer that he makes these years of funk lively, engrossing and on occasion mordantly funny.
This emphasises the lack of boundaries between Nina's identity and those of the other young women in the company, while mordantly suggesting the interchangeability of these young women, who are defined by their youthfulness and appearance.
And, as Mertha mordantly records in a fashion made more striking by its colloquial tone, to the extent there has been awareness of Beijing's involvement with the Khmer Rouge, "China embraced a sucker's payoff in a Faustian bargain: it justifiably received international condemnation for maintaining the viability of the CPK regime while receiving precious little benefit from its Cambodian allies" (p.
He said the instructions for Cooperstown were "like D-Day,'' but noted mordantly, "Anything I do is OK because they'll say, 'He's old.
Lost for Words is an unexpected work for an author known for his mordantly dark, semiautobiographical series of five Patrick Melrose novels, a tour d'horizon through debauched precincts of the British aristocracy that begins with Never Mind (1992) and ends with At Last (2012).
your go-to film for this sort of occasion is probably something bittersweet and hyper-verbal, something set to a jazz soundtrack as love blossoms and ends between two oddball neurotics as our melancholic but mordantly hopeful bespectacled hero concludes that "we need the eggs.
The condition of exile is rarely easy, but Brodsky, fortified by a temperament both cheerful and mordantly sardonic, taking now as his domain the global landscape, the cold galactic emptinesses, the whole range of human history, set about his poetic task with fierce and undiscourageable industry.
It includes a poem whose mordantly ironic title itself became a proverb in the conflict" Whatever You Say Say Nothing.