The color fastness of the samples to washing and rubbing
(wet and dry) was determined using the ISO 105: CO6 2010 and ISO
105: X12 2001test methods, respectively. K/S value of dyed samples
was calculated from the reflectance at the wavelength of 450 nm
using a spectrophotometer (X-Rite, Gretag Macbeth Colour-Eye
7000A) with UV component included and specular component
excluded