Fig. 9
![Fig. 9](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40494-021-00509-0/MediaObjects/40494_2021_509_Fig9_HTML.png)
Graphic representation of L′, C′ab and hab from the ochre tesserae (oc) after each cleaning process: the surface a with a 6-week deposit layer (m0), b after brushing (m1) and c after mopping (m2). The mean L*C*hab values are represented by (●). The mean values of the previous cleaning stages are represented by (x) and (o) so it is easier to determine the shift (Table 1)