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Aesthetical compatibility of the treatments, according to the criteria outlined by [67].
| Risk of Incompatibility | Colour Difference | Treatments | |
|---|---|---|---|
| Sandstone | Limestone | ||
| Low | ΔE* < 3 | NC | NL, NC, DAP |
| Medium | 3 < ΔE* < 5 | NL | NC-DAP |
| High | ΔE* > 5 | DAP, NL-DAP, NC-DAP, DAP-NL, DAP-NC | NC-DAP, DAP-NL, DAP-NC |
