Table 2. Color values of Platycodon grandiflorums depending on steaming methods and repeated steaming process

Sample¹⁾	Color value			Browning index (abs at 420 nm)
Sample¹⁾	Lightness (L*)	Redness (a*)	Yellowness (b*)	Browning index (abs at 420 nm)
Control	68.75±0.02^a²⁾	-0.36±0.05^e	18.45±0.29^c	0.19±0^e
Steaming	57.16±0.35^c	3.31±0.12^c	20.53±0.15^a	0.38±0.01^d
AS1	60.68±0.02^b	2.74±0.06^d	20.37±0.20^ab	0.50±0^c
AS2	50.88±0.17^d	6.00±0.03^b	19.77±0.42^b	2.15±0.01^b
AS3	42.01±0.16^e	6.07±0.03^a	12.86±0.46^d	2.44±0.05^a

Control, not-steamed Platycodon grandiflorum; Steaming, steamed at 95°C and dried Platycodon grandiflorum; AS1, autoclave steamed and dried Platycodon grandiflorum by one time; AS2, autoclave steamed and dried Platycodon grandiflorum by two times; AS3, autoclave steamed and dried Platycodon grandiflorum by three times.
Values are mean±SD of triplicate determinations. Different superscripts within a column indicate significant differences (p<0.05).