Optimization of Microwave Vacuum Drying and Pretreatment Methods for Polygonum cuspidatum

Table 3

Color values of P. cuspidatum slices in all drying conditions.

Samples	Color values
	Fresh	62.78	8.25	36.63	-
(1)	51.78	9.34	34.12	11.33
(2)	48.59	9.97	33.90	14.55
(3)	49.3	8.57	34.19	13.70
(4)	51.57	7.05	34.35	11.50
(5)	56.82	7.23	41.05	7.49
(6)	51.94	7.98	36.49	10.84
(7)	55.48	7.04	38.85	7.73
	54.79	7.77	37.48	8.05
	56.25	7.69	41.24	8.01