Table 3.
ΔL*, Δa*, Δb*, and ΔE* values and standard deviations measured on Apuan marble and Ajarte specimens before and after the application of the treatments.
| Lithotype | Treatment | ΔL* | Δa* | Δb* | ΔE* |
|---|---|---|---|---|---|
| Apuan marble | SILRES BS 290 | −1.69 ± 0.91 | 0.01 ± 0.01 | 0.50 ± 0.24 | 1.77 ± 0.92 |
| WNC | −1.23 ± 0.45 | −0.14 ± 0.17 | 0.73 ± 0.60 | 1.52 ± 0.54 | |
| ANC | −2.69 ± 0.76 | −0.05 ± 0.02 | 0.56 ± 0.11 | 2.75 ± 0.76 | |
| Ajarte | SILRES BS 290 | −5.40 ± 0.85 | 0.52 ± 0.08 | 2.06 ± 0.34 | 5.80 ± 0.91 |
| WNC | −0.94 ± 0.29 | −0.36 ± 0.06 | 1.08 ± 0.25 | 1.50 ± 0.28 | |
| ANC | −1.97 ± 0.77 | 0.21 ± 0.09 | −0.28 ± 0.87 | 2.19 ± 0.64 |