Table 2: Means and SDs of color change for 0.6 mm thickness of all materials.

Materials Used Feldispathic Zircon Emax Press Emax CAD
- - - - - - - - -
Surface Glazed Polished Glazed Polished Glazed Polished Glazed Polished
- - - - - - - - -
Mean ΔE* 1.5 4.92 1.82 4.35 1.92 5.57 1.58 5.53
- - - - - - - - -
STDEV 0.50 0.29 0.28 0.52 0.57 0.44 0.46 0.41
P-value P ≤ 0.01 P ≤ 0.01 P ≤ 0.01 P≤ 0.01

Graph 1: Colour changes of 0.6 mm thick samples for all materials used.