Table 1.

Colour variation of group I (0.5 mm) samples after multiple firings

Firings	L*	a*	b*	∆E
2	70.31	1.87	14.52	18.66
3	70.3	1.95	14.58	19.46
4	70.31	1.95	14.68	19.74
6	70.3	1.96	14.54	19.77
8	70.34	1.94	14.56	19.82
10	70.38	1.97	14.58	19.78