Figure 11From: Setup of a sustainable indoor cleaning methodology for the sculpted stone surfaces of the Duomo of MilanCharacterization of the cleaned stone surface (A-B) through ESEM-EDX, and of the polished cross-section through optical microscopy (C) and ESEM (D). False colour image (B) indicates the prevailing distribution of calcium (blue), and of the residual sulphur (green) and silica (red).Back to article page