Terminalia Arjuna Dyed Woolen Yarn-Effect Of Binary And Ternary Metal Salt Combinations: A Greener Route For Production Of Ecofriendly Textiles

Terminalia arjuna(Roxb.) Wight and Arn. (family: Combretaceae) is a large evergreen cardioactive plant drug available throughout India. The bark of T. arjuna is medicinally used as a tonic and is chemically characterized by the presence of tannins and related compounds with 20.0-24.0% tannin content. This research study investigates the use of barks of T. arjuna for the extraction of color components to develop natural and beautiful shades on wool with different hues and tones using binary and ternary metal salt combinations (aluminum potassium sulfate, ferrous sulfate, and stannous chloride). The dyeing was carried by exhaustion method and dyed samples were analyzed using a reflective spectrophotometer in terms of CIELAB (L*, a*, and b*) and color strength (K/S) values. Wash and light fastnesses were investigated according to (International Organization for Standardization)ISO standards. pH has marked effect on the K/S values of dyed woolen yarn. The results showed that overall 54 different shades having good to very good fastness properties were produced by control dyeing (un-mordanted) and the use of different metallic salt combinations in dyeing of wool using T. arjuna bark extract as a source of natural dye.