Fig. 3From: Realizing sensations: analyzing Paul Cezanne’s watercolors and assessing their light sensitivity with microfade testingDetails of Mont Sainte-Victoire under normal a and UV illumination b that show the extent of fading of the emerald green clouds in the sky (outlined in green lines), which remains visible under UV. The orange fluorescence is the result of staining, the source of which is currently unknown Back to article page