Table 2.

Effect of various concentrations of HO and AA on color values including L, a, and b, total color difference (ΔE) and whiteness index (WI) of Ge/F bilayer films ^a.

AA concentration (%v/v)	HO concentration (%v/v)	L*	a*	b*	ΔE	WI
	0	86.47 ± 0.44a	1.26 ± 0.04a	8.46 ± 0.12a	13.49 ± 0.14a	83.91 ± 0.02a
0	0.75	81.04 ± 0.16b	0.52 ± 0.04b	13 ± 0.11b	19.21 ± 0.22b	76.78 ± 0.03b
	1.5	75.76 ± 0.57c	0.15 ± 0.14c	15.57 ± 0.11c	24.29 ± 0.14c	70.59 ± 0.03c
	0	85.67 ± 0.29 a	0.56 ± 0.03b	6.66 ± 0.16d	11.63 ± 0.09d	84.33 ± 0.09a
1	0.75	83.49 ± 0.33d	−0.35 ± 0.05d	9.22 ± 0.08a	14.63 ± 0.1e	81.39 ± 0.28d
	1.5	78.81 ± 0.25e	−0.7 ± 0.64e	17.40 ± 0.13d	24.05 ± 0.17c	72.64 ± 0.19e
	0	86.31 ± 0.28 a	0.54 ± 0.14b	8.31 ± 0.1a	13.33 ± 0.13a	84.44 ± 0.16a
2	0.75	83.38 ± 0.28d	−0.36 ± 0.03d	13.65 ± 0.09b	19.29 ± 0.13b	78.28 ± 0.18f
	1.5	80.60 ± 0.39b	−0.55 ± 0.12f	15.53 ± 0.09c	21.55 ± 0.21f	75.33 ± 0.18b

^aPresented value correspond to the mean ± standard deviation. Different letters in the same column show significant differences (p < 0.05).