Sources of natural dye-A critical review

Most of the synthetic dyes are noticeably found harmful and toxic. When used on textiles they can cause allergy, skin disease, cancer etc. So, there is need to produce natural dyes. Demand for natural dyes has been growing rapidly due to increased awareness on hazardous, toxic and allergic reactions associated with synthetic dyes. Natural dyes are obtained from natural sources such as plants, insects and minerals. Among all the plant based dye sources i.e. bark, leaves, flowers, seeds etc., these dye sources are more important for textile dyeing as all the sources provide dye from the source which is found in abundance but still not fully utilized. This paper reviews the available different dye sources, extraction of coloring components and colors obtained on textile material after dyeing process.