Table 7.
Sensitive expression of color difference by N.B.S Unit 6.0

	Sensitive expression of color difference
0.0 ~ 0.5	Trace
0.5 ~ 1.5	Slight
1.5 ~ 3.5	Noticeable
3.0 ~ 6.0	Appreciable
6.0 ~ 12.0	Much
12.0 ~ d	Very much