DYEING, FASTNESS AND UV PROTECTION PROPERTIES OF COTTON FABRIC DYED WITH MANGROVE BARK EXTRACT

摘要

Cotton fabric was dyed with a natural dye extracted from mangrove bark by the exhaustion process. Optimal results were accomplished when dyeing at 90 degrees C for 60 min and at pH 5. The dyeing was subsequently conducted with and without metallic salt mordants, using three different mordanting methods, pre-mordanting, meta-mordanting and post-mordanting. The mordanting not only improved color strength of the dyed cotton fabric, but also produced a variety of color shades. The color fastness to washing was very poor to poor due to a change in color shade after washing, but there was no fading of the color. The color fastness to light varied mostly from a fair to a good level. Color fastness to crocking, perspiration and water ranged from fair to very good, depending on the type of mordants used. Cotton fabric dyed with mangrove bark extract also showed very good to excellent UV protection properties.