Table 3 Colourimetric coordinates (L*, a*, and b*) and total colour difference (∆E) between the TiO2-coated barite composite pigments and rutile TiO2.

From: Preparation of TiO2-coated barite composite pigments by the hydrophobic aggregation method and their structure and properties

Samples

TiO2 mass ratio (%)

Colour coordinates

∆E

L*

a*

b*

Barite

0

93.44

2.28

3.35

—

Rutile TiO2

100

97.04

−0.44

0.51

—

Barite-TiO2

20

95.34

0.30

1.05

1.93

Barite-TiO2

40

96.16

0.47

0.98

1.35

Barite-TiO2

60

97.34

0.13

0.66

0.66

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