Table 3 The effect of pretreatment on color and color difference (ΔE) of Colocasia esculenta (L.) Schott stem

	Color
	L*	a*	b*	ΔE
Raw	53.33±0.80ab	-13.76±0.68ab	33.94±1.69a	-
Drying	46.87±4.50b	-17.13±0.67b	30.93±1.84a	8.32±3.67
Blanching	49.26±3.09b	-14.96±1.50c	33.86±1.08a	4.92±1.92
Drying after blanching	58.29±3.66a	-12.43±1.47a	34.00±4.39a	6.49±3.32

^a-cMeans with different superscripts in a column are significantly different.