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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)

From: On-site monitoring of the performance of innovative treatments for marble conservation in architectural heritage

Area Candoglia marble Crevoladossola marble
ΔL* Δa* Δb* ΔE* ΔL* Δa* Δb* ΔE*
T 0.41 −0.02 0.60 0.72 −0.89 0.10 0.72 1.15
Tn −0.48 0.02 −0.23 0.54 0.40 −0.05 0.20 0.45
S −1.17 −0.02 2.30 2.58 −2.46 0.11 2.43 3.46
Sn 0.69 −0.07 −0.72 1.00 1.78 −0.06 −0.88 1.99
CSn 0.38 −0.09 0.33 0.52 −1.55 −0.03 1.33 2.04
FS −0.49 −0.03 0.82 0.96 −2.48 0.05 1.09 2.71
FSn 1.94 −0.14 −0.85 2.13 −0.74 −0.03 0.15 0.75