Table 2.

Tukey HSD post hoc comparisons of significant differences between groups.

Parameter	Comparison	Mean Difference	P-value
Lightness (L∗)	Control vs. Pressable	−4.44	<0.001
	Control vs. Milled	−0.32	0.817
	Pressable vs. Milled	4.12	<0.001
Red-Green (a∗)	Control vs. Pressable	−0.62	<0.001
	Control vs. Milled	−0.50	<0.001
	Pressable vs. Milled	0.12	0.347
Blue-Yellow (b∗)	Control vs. Pressable	−0.46	0.046
	Control vs. Milled	0.87	<0.001
	Pressable vs. Milled	1.33	<0.001