For the present study Quercetin has been extracted and applied onto the gamma irradiated cotton. Fabrics and powder have been exposed to different absorbed doses and dyeing has been performed at various parameters. It is observed that 20 kGy is the optimum absorbed dose for surface modification of cotton. It has been also found that good colour strength has been obtained at 60°C by dyeing optimal fabric for 40 min using dye bath of pH6 keeping liquor concentration of 1:30 and electrolyte concentration of 1 g. 7% of tannic acid as pre-mordant and 5% of Copper sulphate as post mordant was optimum conditions to get good fastness properties according to ISO standard methods. Quercetin from acacia bark under ionizing radiation can safely be used as possible substitute to reddish-brown synthetic dyes.

The utilization of bio-mordants to make natural coloring process more eco-friendly is gaining worldwide fame, whereas the addition of microwave treatment has added value to the extraction of colorant under mild conditions. The Current study has been undertaken to isolate tannin from neem (Azadirachta indica) bark under the impact of microwave radiation for the dyeing of mordanted (chemical and bio) silk fabric. For this purpose, the extraction of colorant (tannin) has been carried out in various media and dyeing variables have been optimized. For making the process more sustainable and clean, extracts ofbio-mordants such as turmeric (Curcuma longa), henna (Lawsonia inermis), pomegranate (Punica granatum) and acacia (Acacia nilotica) have been employed at given conditions. It is found that microwave radiation for 2 min. to acidified methanolic extract of 2 pH obtained from 6 g powder has given good color strength in irradiated silk when it is used to dye at 75°C for 65 min. by employing 3 g/100 mL of Glauber’s salt the as exhausting agent. It is concluded that microwave treatment has not only enhanced the extraction of tannin from neem bark but also improved the color characteristics under low conditions.