selection of the method for dyeing the fiber, yarn or fabric. Human eyes sense the color due to dyes which absorb and reflect light at specific wavelengths. Majorly dyes are of two types - natural and synthetic dyes. The natural dyes are extracted from natural substances such as plants, animals, or minerals. Natural food dyes •A growing number of natural food dyes are being commercially produced:. Some examples include: •Caramel coloring (E150) made from caramelized sugar. •Annatto (E160b) a reddish-orange dye made from the seed of the achiote. •Chlorophyll (E140) a green dye made from Chlorella algae •Cochineal (E120) a red dye derived from the cochineal Natural dyes are derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources-roots, berries, bark, leaves, and wood—and other organic sources such as fungi and lichens. Natural dyes are mostly used to dye natural fibers like cotton, wool, silk, jute etc. Natural Dyes: Sources, Chemistry, Application and Sustainability Issues 39 (1H-indol-3yl b-D-glucoside). The leaf production from one acre of cultivated indigo plants is approximately 5,000 kg which can yield about 50 kg of pure natural indigo powder after processing. It is produced by fermenting the fresh plant Natural dyes can be used on most types of material or fibre but the level of success in terms of fastness and clarity of colour varies. Users of natural dyes, however, tend to also use natural fibres, to give a total natural effect. Synthetic fibers can also be dyed with natural dyes, if proper mordant and proper Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. (Fraxinus excelsior L.) bark as natural dye for textile dyeing: 8 Vankar P S, Mishra A, Ghorpade B & Tiwari V, Sonicator process conditions and process stability, J Color Technol, dyeing of cotton with Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources ± roots, berries, bark, leaves, and wood ² and other organic sources such as fungi and lichens. Archaeologists have found evidence of textile dyeing The final shade depends on the type of mordant used in dyeing. Natural dyes are used in the dyeing of cotton [6, 7], linen , wool [9, 10], silk [11, 12], nylon and polyester [13, 14] fabrics. The natural dyes can be classified in different ways such as based on origin/source type, type of hue, chemical structure [15, 16] and colour components In the past, dyes were obtained from plants, animals or minerals. After the discovery of the first synthetic dye by W. H. Perkin in 1856, many thousands of synthetic dyes have been found and by the 1870s commercial dyeing with natural dyes was in the decline. For textile finishing processes first stage is pre-treatment. Natural dyes produce an extraordinary variety of products and complex colors that complements each other. Straight off a day synthetic leads to high environmental pollution. In recent year, the interest of researchers has changed over on utilizing natural dyes in textiles, food and cosmetics industries. Natural dye sources are eco-friendly and These dyes are generally used in coloration of textiles, food, cosmetics and drugs. This article attempts to reviews the classification of natural dyes according to the method of application mordanting methods, extraction methods, dyeing methods and ad