Textile Dyeing With Natural Dye From Sappan Tree (Caesalpinia Sappan Linn.) Extract release_uoyqwphyhfehln2ig2kvn7josq

Abstract

Natural dye extracted from <em>Caesalpinia sappan</em> Linn. was applied to a cotton fabric and silk yarn by dyeing process. The dyestuff component of <em>Caesalpinia sappan</em> Linn. was extracted using water and ethanol. Analytical studies such as UV–VIS spectrophotometry and gravimetric analysis were performed on the extracts. Brazilein, the major dyestuff component of <em>Caesalpinia sappan</em> Linn. was confirmed in both aqueous and ethanolic extracts by UV–VIS spectrum. The color of each dyed material was investigated in terms of the CIELAB (L*, a* and b*) and K/S values. Cotton fabric dyed without mordant had a shade of reddish-brown, while those post-mordanted with aluminum potassium sulfate, ferrous sulfate and copper sulfate produced a variety of wine red to dark purple color shades. Cotton fabric and silk yarn dyeing was studied using aluminum potassium sulfate as a mordant. The observed color strength was enhanced with increase in mordant concentration.
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