Table 5 L*a*b* values of different colorant blending ratios.

From: Preparation and research of new black zirconia ceramics

Composition

L*

a*

b*

X = 1

47.3

3.31

5.22

X = 4

44.32

0.37

− 0.61

X = 7

44.26

0.38

− 0.60

X = 10

43.62

0.11

− 0.44

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