Table 3.

Colour variation of group III (1.5 mm) samples after multiple firings

Firings	L*	a*	b*	∆E
2	73.81	1.7	11.85	16.4
3	73.84	1.58	11.81	16.3
4	73.21	1.53	12.01	16.74
6	73.84	1.42	11.96	16.87
8	73.96	1.18	11.82	16.72
10	74.18	1.26	11.88	16.59