• khusbu kumari gupta

Natural indigo dye is basically used for denim fabric dyeing. Indigo is a vat dye, which means that it needs to be reduced to its water soluble leuco form before dyeing. For most industrial vat and indigo, dyeing processes, all of them are reduced mainly using chemically. However, this is considered environmentally unfavourable because of waste waters contaminating degradation products. This process produces large amounts of hazardous by-products which increase the costs for waste water treatment. Hence, many attempts are being made to replace the environmentally unfavourable chemical by ecologically by more attractive alternatives. In this study, a natural reducing agent which is prepared from a fruits like banana, banana peel, mango, mango peel, dates, grapes, green apple, green apple peel and figs have been studied on the cellulosic fiber (cotton fabric). This study also confronts a set of physical properties of dyed sample K/S value, light fastness, fastness to rubbing, fastness to wash, fastness to perspiration. The analysis depended on three factor are temperature, sodium calcium hydroxide and natural reducing agent concentrations. Natural reducing agent has best reducing activity at the temperature of 80°C for 1 hr. The 25ml of reducing agent and 1g of calcium hydroxide gave best result in vatting process at the temperature 50 ⁰C for 10 minutes duration whereas 10ml of reducing agent and 0.5g of calcium hydroxide gave best result in dyeing process at the temperature of 50⁰C for 30 minutes duration. The reducing agent extracted from banana gave best as compare to other fruits in term of k/s value which was 0.930 and the colourfastness properties was also good as compared to other reducing agents.

indigo dye, reducing agent,natural dyeing process,vatting of indigo dye

"DYEING COTTON FABRIC WITH INDIGO DYE BY USING SELECTED NATURAL REDUCING AGENTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 5, page no.f312-f326, May-2022, Available :http://www.jetir.org/papers/JETIR2205650.pdf

"DYEING COTTON FABRIC WITH INDIGO DYE BY USING SELECTED NATURAL REDUCING AGENTS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 5, page no. ppf312-f326, May-2022, Available at : http://www.jetir.org/papers/JETIR2205650.pdf