Table 4. Expression rate of 6-year-old red ginseng inner defect by grade (unit: %)

Grade	Horizontal section of inner white	Vertical section of inner white	Horizontal section of inner cavity	Vertical section of inner cavity	Ratio of saengnaeback1)
	Cheon2)	96	78	4	2	98
Ji	100	96	5	4	91
Yang	98	95	19	10	80
Gi	91	81	34	36	79

Saengnaeback, the underprocessed inner white which is not porous, has indistinguishable boundary from normal tissue.
Cheon, 1st grade; Ji, 2nd grade; Yang, 3rd grade; Gi, out of grade ginseng (n=100).