Environmental Friendly Dyeing of Silk Fabric with Natural Dye Extracted from Cassia singueana Plant

Abstract

Introduction and application of eco-friendly natural dyes on textile coloration have significant importance on the reduction of environmental pollution. Due to this reason many scientists are doing research work on natural dye application on textile materials in the past few years. Having this in mind, this investigation was concerns with the dyeing of silk fabric with colorant extracted from bark of Hambo Hambo (Cassia singueana) plant in the presence of Aloe Vera as natural mordant. Aqueous extraction method was employed for obtaining coloring components. The extraction parameters have been studied and optimum dye extraction condition was examined under UV-Visible spectroscopy which recorded its maximum absorption as (A=3.9). Silk fabric was dyed with the extracted natural dye without mordant and in the presence of synthetic and natural mordants using different mordanting techniques. The color strength, CIE L*A*B* values and fastness properties of the dyed samples were analysed according to the international standards. The Washing fastness, rubbing fastness and light fastness obtained from the directly dyed without mordant and dyed using with Aloe Vera and Copper sulphate (CuSO4.5H2O) mordants was almost similar which was recorded in the range of very good to excellent. The results of this investigation led to the conclusion that there is possibility of dyeing of silk fabric using natural dye extracted from Cassia singueana plant directly without mordant and dying in the presence of Aloe Vera with acceptable range of fastness properties of dyed silk fabric.