Indigo tinctoria

Indigo was originally made from two plants. One is woad, Isatis tinctoria, a native of Greece and Italy, and the other is indigo, Indigofera tinctoria, a native of India. At the end of the nineteenth century, German scientists synthesized the dye, and production from plant sources declined. Most of the dye today comes from China. 

For catarrhal conditions, combine either the berries or blossoms with goldenrod (Solidago species), boneset and wild indigo (Baptisia tinctoria). 

T. Maugard, E. Enaud, P. Choisy and M.D. Legoy, Identification of an indigo precursor from leaves of Isatis tinctoria (Woad), Phytochemistry, 58, 897 904 (2001). 

Blue dyeings were also produced in Europe. Here the process involved using the woad plant (Isatis tinctoria) without isolation of the dye. The cities of Erfurt and Toulouse were important centres of cultivation [3], In the 1600s, Indian indigo captured the market in Europe because of its lower price and more brilliant shade. 

The fermentation mix can also be used directly for dyeing. The textile is impregnated with the fermenting mash and then blued by oxidation in the air. This type of dyeing was carried out with woad (Isatis tinctoria ). Pure indigo dye was not extracted from woad because of its low content of indican (15). 

The blue dye indigo, derived from the plant Indigofera tinctoria, has been used in India for thousands of years. Traders introduced it to the Mediterranean area and then to Europe. Tyrian purple, a natural dark purple dye obtained from the mucous gland of a Mediterranean snail of the genus Murex, was a symbol of royalty before the collapse of the Roman empire. Alizarin, a bright red dye obtained from madder root Rubia tinctorum), a plant native to India and northeastern Asia, has been found in cloth entombed with Egyptian mummies. 

Some important dyes are extracted from species in the legume family. One of the world s most important, natural dyes is indigo, extracted from the foliage of the indigo Indigofera tinctoria) of south Asia and to a lesser degree from American indigo (/. suffruticosa) of tropical... 

Indigo Coloring matter Indigofera tinctoria India... 

Baptisia Tinctoria Common Names Baptasie, Baptisia, False Indigo, Horseflyweed, Indigoweed, Rattlebush, Wild Indigo... 

Indigo A blue dye obtained from several plants, especially the species of Indlgofera (I. tinctoria, I. anil), etc. and woad (Isatis tinctorial. 

The most important source of blue colourants in Europe was woad (Isatis tinctoria), from which indigo could be produced (cf. Section 2.1). Chemically related are the purple dyes obtained in ancient times from sea-snails of the genus Murex (cf. Section 2.2). Depending on the particular species of snail, violet to reddish-purple textile dyes can be obtained. Tyrian purple and indigo are both vat dyes. 

Colorants containing anthraquinone and its derivatives can be obtained from parasitic insects such as Dactylopius coccus, i.e., cochineal and Kerria lacca, i.e., lac. Alizarin can be extracted from the dried roots of the Rubia plant, and indigo can be extracted from Isatis tinctoria or Indigofera tinctoria. Some derivatives are shown in Figure 3.10. 

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