A purple dye. Obsolete. rare.

= sandalwood, n., in its various applications. (Cf. red sanders, n.)

Originally: red ochre, esp. as used as a dye for marking animals. Later also: a mixture of dyes or pigments of any colour used for marking…

An oak gall; spec. one of a kind obtained from an oak of Asia Minor, Quercus infectoria, used as a dyestuff and to give astringency to ointments.

That used as a material in dyeing, tanning, etc., or its bruised residue, ‘spent bark,’ ‘tan’.

The heartwood of an American tree (Hæmatoxylon Campechianum) used in dyeing; so called from being imported in the form of logs.

= sense 1.

A name given to several astringent substances, containing from 40 to 55 per cent. of tannin, which are obtained from the bark, wood, or fruits of…

The same as catechu, n. or cutch, n.1

= catechu, n.

The large acorn-cups and acorns of Quercus ægilops (and the related Q. vallonea), a species of oak growing esp. in the north-eastern Mediterranean…

= Indian wood n. at Indian, adj. n.compounds 1b(b).

The commercial name of the catechu obtained from Acacia Catechu, used in tanning, etc.

The root of the either of two plants of the genus Rubia used to produce the red dye madder, wild madder, R. peregrina, and common madder, R. tinctoria…

A precisely made solution of a dyestuff that may be used or diluted to achieve a particular colour in printing, dyeing, etc. Obsolete. rare.

a dye for cotton consisting of hydrated ferric oxide, prepared in situ by impregnating the fabric with an iron salt, treating it with alkali, and…

A red dye obtained from the root of the madder plant.

a dye which is applied in an acidic solution, the chromophore typically being an anionic species.

A dyeing substance obtained from madder.

a solution of tin and logwood formerly used for dyeing fabric.

The root of Morinda citrifolia; a dye obtained from this; morindin.

An orange-red glycoside of morindone which is present in the roots of morindas and in certain other trees, and has been used as a dye. Cf. suranji, n.

Any of various dyes (in later use chiefly aniline dyes) imparting a blue colour.

a dye made by mixing two different dyes; esp. one used to dye the two materials of a union cloth, typically cotton (cellulose) and wool or silk…

indigo-disulphonate (sulphindigotate) of sodium or potassium, used for dyeing silk, and as a water-colour.

(See quots.)

a pigment in the form of an insoluble powder, used in colouring textiles.

A reddish-brown base used in making a number of red dyes, esp. fuchsin. Also: any of these dyes. Cf. pararosaniline, n.

= rosaniline, n.

‘A dye or pigment prepared by dipping linen rags in solutions of certain colouring matters’ Watts Dict. Chem. I. 583.

Miscellaneous technical uses. A dye used as a foundation for a subsequent dye. Cf. bottom, v. 1c.

(a) an acid dye; (also) a colour produced by such a dye; (b) an intense or vivid colour (cf. sense A. 5).

a white or reddish crystalline compound, C6H4(NH2)2, used as a photographic developer, for dyeing hair and fur, and in the manufacture of dyes…

see quots.

the precipitate from a solution of tin chloride and yellow prussiate of potash, used for dyeing.

Any of a series of organic dyes produced by replacing the oxygen atom of one of the C=O groups of phthalic anhydride by two (substituted) phenyl…

In calico-printing, a fugitive colour used to test the quality of the work.

A chromium compound used in dyeing (e.g. sodium dichromate) or tanning.

A bluish-red dye related to fluorescein, used esp. as a biological stain.

a group of coal-tar colours.

(a) An organic compound containing the group N N. (b) One of a group of heterocyclic organic compounds with two, three, four, etc., nitrogen atoms…

Having the base in excess. a dye consisting of salts of bases containing aromatic amino- and substituted amino-groups.

An acid colour used in dyeing. Also attributive.

= garancin, n.

any of a class of insoluble azo dyes which are formed directly on fibre by impregnating it with one component of the dye (naphthol or a naphthol…

a colouring matter produced by chemical alteration of decayed wood.

a colour used in cross-dying.

(a) (With lower-case initial.) Indanthrone, C28H14N2O4 (in quot. 1921 used for the oxygen-free parent compound, C28H18N2: cf. quot. 1920). (b)…

Any of various azo pigment dyestuffs, many of which are the salts of diazo coupling compounds of β-naphthol and aromatic amino-sulphonic acids. Litho…

a water-insoluble dye that is applied in a reducing bath that converts it to a soluble leuco-form with affinity for the fibre, the colour being…

A red vat dye in which the two imino groups of indigotin are replaced by sulphur atoms; also, any of various derivatives of this also used as dyes.

any of various dyes that consist chiefly of the coupling product of diazotized paranitraniline and β-naphthol and are used in printing inks and…

= vat dye n.

= vat dye n.

(a) A blue compound, C28H14N2O4, which is composed of two anthraquinone nuclei linked by two imino-groups and is the parent compound of an…

Any of a group of related diazo compounds formerly used as specific dyes for rayon. Frequently attributive.

A proprietary term for a range of water-soluble vat dyes derived mainly from anthraquinones. Frequently attributive.

A proprietary name for a range of synthetic dyestuffs used esp. in chemical analysis in colour tests for various metals, notably aluminium. Usually…

A proprietary name for any of a range of azo-dyestuffs which contain sulphate ester groups and were formerly much used for direct dyeing of…

Of a dye: similar to indigotin in chemical structure, spec. in having another atom or atoms, esp. of sulphur, in place of one or both of the…

any of a class of vat dyes that are substituted derivatives of thioindigo and are used esp. in textile printing; also attributive or as adj.

Any of several oil-soluble fluorescent dyes, typically yellow or green.

A proprietary name for: any of a large class of reactive dyestuffs based on 1,3,5-triazine and covering a wide range of colours. Usually attributive.