Abstract
This paper reviews the characterization and chemical/biochemical analysis of natural dyes. Extraction of colorants from different natural sources, effects of different mordents and application of binary mixture of natural dyes. Natural dyes are different sources such as plant dyes animal dyes mineral dyes etc. and characteristics of natural dyes such as chemical/biochemical analysis by using UV-visible spectroscopic and chromatographic analysis.
Highlights
Natural dyes are known for their use in coloring of food substrate, leather as well as natural protein fibers like wool, silk and cotton as major areas of application since pre-historic times
Worldwide the use of natural dyes for the coloration of textiles has mainly been confined to artisan / craftsman, small scale / cottage level dyers and printers as well as to small scale exporters and producers dealing with high-valued eco-friendly textile production and sales
A number of commercial dyers and small textile export houses have started looking at the possibilities of using natural dyes for regular basis dyeing and printing of textiles to overcome environmental pollution caused by the synthetic dyes [1]
Summary
Natural dyes are known for their use in coloring of food substrate, leather as well as natural protein fibers like wool, silk and cotton as major areas of application since pre-historic times. Worldwide the use of natural dyes for the coloration of textiles has mainly been confined to artisan / craftsman, small scale / cottage level dyers and printers as well as to small scale exporters and producers dealing with high-valued eco-friendly textile production and sales. A knowledge Repository treatment and pre- dyeing process (preparation, mordanting) and dying process variables for producing uncommon shades with balanced color fastness and eco-performing textiles [2]. The present paper reports the studies carried out so far on the chemistry and application of natural dyes on textiles to understand the science of natural dyeing as well as to focus the problem areas, difficulty and probable measures to overcome them.
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