Study on dyeing ability of cotton fabric 100% with naphthaquinone extracted from nipa coconut shells

Natural dyes are known widely thanks to friendly properties to environment as health protecting ability for human. In this study, naphthaquinone of nipa coconut shells extracted by the reflux method that created effectively. The influences of ratio of dye extract, temperatures and time of dyeing and types of mordants based on the color strength (K/S) and color difference (DE) were studied. Our study applies the methods of extracting colorants in ethanolsolvent, dyeing on an infrared dyeing machine, Mesdanby the exhaust dyeingmethod, measuring color on an X-Rite Color i5 spectrometer machine, analyzingeffecting parameters by CIELabpopular color space, and measuring Fourier-transform infrared (FTIR) spectroscopy to evaluate the presence of naphthaquinone in dye extractand bonding on fabric, testing morescanning electron microscopy (SEM) to observe the surface of dyedsamplesclearly. As results, the Nipa fruticans shell extract can dye 100% cotton fabric with a color difference ∆E of 41.07 and a K/S color strength of 12.96 when dyed with 10% CuSO4.7H2O because of their complex formation with the colorant with cellulose. Color fastness to washing on dyed cotton samples according to the ISO 105 – C06 A1S  and ISO 105-X12 standard were tested to clarify further impacts of mordants to dye ability.