Study on the Extraction and Utilization of Natural Dye from Noni Root

The present research work emphasized on the preparation of natural dye (concentrated solution) from Noni root (Morinda citrifolia L.). The physico-chemical properties such as moisture content, ash content, total solids content and pH of Noni root were determined by Association of Official Analytical Chemists (AOAC) method. The chemical compounds present in Noni root were investigated by phytochemical tests. Natural dye was extracted from chopped Noni root with pure water at 70ºC for 120 minutes. The physico-chemical properties of extracted natural dye were also determined by AOAC method. An attempt was made on the dyeing of cotton fabrics using extracted natural dye with three different mordants such as potash alum, potassium dichromate, copper (II) sulphate and three different dyeing methods such as pre-mordanting, post-mordanting and one - pot with mordanting and dyeing method. The effect of dyeing time, different mordants and different dyeing methods on the properties of dyed cotton fabrics were also investigated. Moreover, washing and rubbing fastness properties, staining and colour change of dyed cotton fabrics were assessed by using standard Grey Scale