Fig. 7From: Colorimetry to assess the visual impact of dust deposition on mosaics at sheltered archaeological sitesHeat maps showing the differences in R, G and B values (∆R, ∆G and ∆B) between a wet cleaned and dirty surface (m0 and m2). The deposits have a greater influence in reds (left) and greens (middle). Area: 500 mm × 510 mmBack to article page