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A kind of lichen (Lecanora parella) once used in dyeing and in the preparation of litmus.

A plant affording a blue dye; the woad (Isatis tinctoria); also, the dye itself.

language. Persian berry, the fruit of Rhamnus infectorius, a kind of buckthorn, used for dyeing yellow, and imported chiefly from Trebizond. -- Persian cat. (Zoöl.) Same as Angora cat, under Angora. -- Persian columns (Arch.), columns of which the shaft represents a Persian slave; -- called also Persians. See Atlant…

-- Phrygian stone, a light, spongy stone, resembling a pumice, -- used by the ancients in dyeing, and said to be drying and astringent.

One of a series of artificial organic dyes made as condensation products of the phenols with phthalic acid, and well represented by phenol phthaleïn. Their alkaline solutions are fluorescent. Phenol phthalein, a white or yellowish white crystalline substance made from phthalic acid and phenol. Its solution in alkalies…

talline substance, C6H4.(CO2H)2, analogous to benzoic acid, and employed in the brilliant dyestuffs called the phthaleins.

Any material from which a dye, a paint, or the like, may be prepared; particularly, the refined and purified coloring matter ready for mixing with an appropriate vehicle.

hthalmia, associated with early and marked redness of the eyeball. -- Pink salt (Chem. & Dyeing), the double chlorides of (stannic) tin and ammonium, formerly much used as a mordant for madder and cochineal. -- Pink saucer, a small saucer, the inner surface of which is covered with a pink pigment.

Not variegated, dyed, or figured; as, plain muslin.

rmis), having broad, reniform leaves. -- Rattlesnake plantain, an orchidaceous plant (Goodyera pubescens), with the leaves blotched and spotted with white. -- Ribwort plantain. See Ribwort. -- Robin's plantain, the Erigeron bellidifolium, a common daisylike plant of North America. -- Water plantain, a plant of the…

A fabric of undyed silk from India and China.

on of potassium ferrocyanide (yellow prussiate of potash) to a ferric salt. It is used in dyeing, in ink, etc. Called also Williamson's blue, insoluble Prussian blue, Berlin blue, etc. -- Prussian carp (Zoöl.) See Gibel. -- Prussian green. (Chem.) Same as Berlin green, under Berlin.

Cloth dyed a purple color, or a garment of such color; especially, a purple robe, worn as an emblem of rank or authority; specifically, the purple rode or mantle worn by Roman emperors as the emblem of imperial dignity; as, to put on the imperial purple. Thou shalt make the tabernacle with ten curtains of fine twined l…

of marine gastropods, usually having a rough and thick shell. Some species yield a purple dye.

A dyestuff resembling alizarin, found in madder root, and extracted as an orange or red crystalline substance.

trong reducer, and is used as a developer in photography and in the production of certain dyes.

varieties are known, a and g. g-pyrone is the parent substance of several natural yellow dyestuffs.

The yellow inner bark of the Quercus tinctoria, the American black oak, yellow oak, dyer's oak, or quercitron oak, a large forest tree growing from Maine to eastern Texas.

a pigment prepared by the Dutch, similar to Indian red. -- Hypericum red, a red resinous dyestuff extracted from Hypericum. -- Indian red. See under Indian, and Almagra.

An East Indian dyewood, obtained from Pterocarpus santalinus, Cæsalpinia Sappan, and several other trees.