2.5. Evaluationofcolorstrength,colo

2.5. Evaluationofcolorstrength,colorfastnessandphysical properties
To evaluate dyeing performance, the color strength (K/S) and CIELAB of the dyed samples were measured using a Hunter Lab Color Quest XE spectrophotometer with illuminant D65 and 10◦ observer. The K/S is calculated by the Kubelka–Munk equation, K/S = (1 − R)2 /2R, where R is the reflectance, K is the absorption coef- ficient, and S is the scattering coefficient. The color difference is expressed as E* and is calculated by the following Eq. (1):

E∗ =
( L∗)2 + ( a∗)2 + ( b∗)2 (1)
where E* is the CIELAB color difference between batch and standard. Here L*, a*, b* and hence E* are in commensu- rate units. L* denotes the difference between lightness (where L* = 100) and darkness (where L* = 0), a* the difference between green (−a*) and red (+a*) and b* the difference between yellow (+b*) and blue (−b*) (Park, 1993). All measured samples showed a maximum absorption wavelength value ( max ) at 400 nm. The color fastness to washing, light, crocking, perspiration, and water of the dyed samples were determined according to AATCC Test Method 61-2010, ISO 105-B02: 1994, AATCC Test Method 8-2007, AATCC

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2.5. Evaluationofcolorstrength, Colorfastnessandphysical properties
Performance To evaluate dyeing, the Color strength (K / S) and the dyed samples were measured using CIELAB of a Hunter Lab Color Quest XE spectrophotometer with illuminant D65 and 10◦ Observer. The K / S is calculated by the Kubelka-Munk equation, K / S = (1 - R) 2 / 2R, where R is the reflectance, K is the absorption coef- ficient, and S is the scattering coefficient. The color difference is expressed as E * and is calculated by the following Eq. (1): E * = (L *) 2 + (a *) 2 + (B *) 2 (1) where E * is the difference between Batch and CIELAB Color standard. Here L *, a *, b * and hence E * are in commensu- rate units. L * denotes the difference between lightness (where L * = 100) and darkness (where L * = 0), a * ​​the difference between green (-a *) and red (+ a *) and b * the difference between yellow (. + b *) and blue (-b *) (Park, 1993). All measured samples showed a maximum absorption wavelength value (max) at 400 nm. The color fastness to washing, light, crocking, perspiration, and water of the dyed samples were determined according to AATCC Test Method 61-2010, ISO 105-B02: 1994, AATCC Test Method 8-2007, AATCC.

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2.5. Evaluationofcolorstrength colorfastnessandphysical properties,,To evaluate dyeing performance the color, strength (K / S) and CIELAB of the dyed samples were measured using a Hunter Lab. Color Quest XE spectrophotometer with illuminant D65 and 10 cream observer. The K / S is calculated by the Kubelka - Munk, equation. K / S = (1 − R), 2 / 2R where R is the reflectance K is, the absorption coef - ficient and S, is the scattering, coefficient. The color difference is expressed as E * and is calculated by the following Eq. (1):E ∗.(L ∗) 2 + (a ∗) 2 + (B ∗) 2 (1).Where E * is the CIELAB color difference between batch and standard. Here L *, *, * a B and hence E * are in commensu - rate. Units. L * denotes the difference between lightness (where L * = 100) and darkness (where L * = 0), a * the difference between. Green (− a *) and red (+ A *) and B * the difference between yellow (+ b *) and blue (− b *), (Park 1993). All measured samples showed. A maximum absorption wavelength value (max) at 400 nm. The color fastness to washing light crocking,,,,, perspiration and Water of the dyed samples were determined according to AATCC Test, Method 61-2010 ISO 105-B02: 1994 AATCC Test Method 8-2007 AATCC,,,