Table 3.

Mean ± standard deviation values recorded for CIE L*a*b*, before and after immersing the specimens in the coffee solution.

Values of CIE L*a*b* for Coffee
Sample	Before			After
	L*	a*	b*	L*	a*	b*
BE	84.0 ± 3.5	−0.8 ± 0.5	13.0 ± 1.7	66.1 ± 2.1	0.4 ± 0.6	29.7 ± 2.0
FS	78.7 ± 2.1	3.4 ± 0.3	36.5 ± 1.6	67.2 ± 3.8	8.7 ± 1.8	50.5 ± 2.2
AF	77.0 ± 3.9	−1.6 ± 0.2	17.3 ± 2.8	67.8 ± 0.6	−0.3 ± 0.5	27.8 ± 0.3