Fig. 12

Graphs showing the spectral reflectance (ρm0 ρm1 and ρm2) and spectral differences (Δρ(1), Δρ(2)) of the selected tesserae after each cleaning process (m0 m1 and m2): a ochre (2R), b white (2B) and c black (2N) tesserae

Graphs showing the spectral reflectance (ρm0 ρm1 and ρm2) and spectral differences (Δρ(1), Δρ(2)) of the selected tesserae after each cleaning process (m0 m1 and m2): a ochre (2R), b white (2B) and c black (2N) tesserae