Table 3 ΔL*, Δa*, Δb* and ΔE* values measured on treated areas of Candoglia and Crevoladossola marble after the application of the treatments (about 1 month)

0.41

−0.02

0.60

0.72

−0.89

0.10

0.72

1.15

−0.48

0.02

−0.23

0.54

0.40

−0.05

0.20

0.45

−1.17

−0.02

2.30

2.58

−2.46

0.11

2.43

3.46

0.69

−0.07

−0.72

1.00

1.78

−0.06

−0.88

1.99

0.38

−0.09

0.33

0.52

−1.55

−0.03

1.33

2.04

−0.49

−0.03

0.82

0.96

−2.48

0.05

1.09

2.71

1.94

−0.14

−0.85

2.13

−0.74

−0.03

0.15

0.75