N. Kusumawati, Samik, A.B. Santoso, S. Muslim
This study has focused on the natural dye extraction from a combination of Caesalpinia sappan L. (CSL) bark and Curcuma longa (CL) bulbs and evaluation of the physicochemical characteristics and performance (color intensity and fastness). To enrich the shades, the CSL-CL extracts were prepared by water solvent extraction using three dye compositions (75% CSL/25% CL; 50% CSL/50% CL and 25% CSL/75% CL) and three fixers (iron (II) sulfate, alum, and calcium oxide). To optimize the interactions between fabric and dye to produce high intensity and fastness, two preparation stages were performed before dyeing, i.e. washing using turkey red oil (TRO) and mordanting using alum and soda ash. UV spectral analysis shows variations in the maximum adsorption wavelength triggered by differences in dye composition. In line with this, the dyeing results also show the shades variation resulting from different types of fixers. From the CieLab coordinate, CL dye which is applied with calcium oxide fixer has produced the brightest color (highest L*) with the appearance of the least reddish (highest a*) and most yellowish (highest b*) color compared to other compositions and fixers. © RASĀYAN. All rights reserved.
Department of Chemistry, Faculty of Math and Science, Universitas Negeri Surabaya, Surabaya, 60231, East Java, Indonesia; Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Surabaya, Surabaya, 60231, East Java, Indonesia
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