Table 1.

Color values of cellulose and CMC_as synthesized with various NaOH concentration.

Type of Sample	L*	a*	b*	WI	YI	∆E	H ab
Cellulose	71.51 ± 0.37 b	3.01 ± 0.05 c	21.31 ± 0.26 b	61.83 ± 0.33 b	31.21 ± 1.89 c	29.62 ± 0.24 ns	5.87 ± 0.17 a
20 g/100 mL NaOH-CMCas	73.88 ± 0.45 a	2.69 ± 0.28 d	20.77 ± 0.50 c	64.54 ± 0.55 a	45.02 ± 1.05 a	37.46 ± 21.89	6.33 ± 0.90 a
30 g/100 mL NaOH-CMCas	71.78 ±0.74 b	2.87 ± 0.08 c,d	21.70 ± 0.38 b	61.99 ± 0.62 b	45.02 ± 1.05 a	29.67 ± 0.35	6.31 ± 0.10 a
40 g/100 mL NaOH-CMCas	68.51 ± 0.44 c,d	3.69 ± 0.25 b	22.78 ± 0.17 a	58.52 ± 0.42 d	45.20 ± 1.01 a	32.90 ± 0.32	4.94 ± 0.14 c,d
50 g/100 mL NaOH-CMCas	69.30 ± 0.47 c	3.54 ± 0.14 b	21.56 ± 0.29 b	59.79 ±0.35 c	41.52 ± 1.66 b	31.50 ± 0.44	5.06 ± 0.17 b
60 g/100 mL NaOH-CMCas	67.97 ± 1.33 d	4.00 ± 0.16 a	21.28 ± 0.31 b	58.34 ± 1.25 d	40.17 ± 1.59 b	32.43 ± 0.94	4.42 ± 0.22 d

Mean ± Standard deviation values within a column in the same group followed by the different letters (a–d) are significantly different (p < 0.05). ns = not significant difference.