2024, Vol. 7, Issue 7, Part J

author(s)
Ngangbam Vedamani Chanu, Nabaneeta Gogoi, Rickey Rani Baruah and Monimala Saikia

abstract
Eco-friendly natural dyes are highly recommended in recent years which are necessary to form a good sustainable environment. Eri matka silk yarn which is spun by hand with the help of an earthen pot found in Manipur is selected for the study. Optimization of various dyeing parameters of dye extracted from the bark of Mangifera indica was evaluated. Tea leaves (Camellia sinensis) and myrobalan (Terminalia chebula) is used as natural mordants to determine the effects of mordant. CIE lab and colour strength (K/S) of dyed yarns were also evaluated and observed that myrobalan (Terminalia chebula) mordanted yarn obtained a greater depth of colour than tea leaves (Camellia sinensis) mordanted. FTIR and SEM were evaluated and found that FTIR shows the difference of spectrum in the control and dyed eri silk yarn and SEM analysis observed that the dyed Eri matka silk seems to be more cylindrical and bigger in diameter than the control fiber. Finally, it enhances the quality of the yarn and produced different shades of yellow-orange and brown colour which exhibited fair to good ratings with slightly to negligible stain. It can be also said that the bark of Mangifera indica has good potential for dyeing silk yarn.