Fig. 7
From: Discovery of a woman portrait behind La Violoniste by Kees van Dongen through hyperspectral imaging
Unexpected hues in the bottom right area. The blue color could belong to the lower painting layer in light of the blue areas visible through the surface layer in different zones of the painting. The pink ones are more complicated to locate. Raman analysis highlights the presence of ultramarine and a red lake. These pink hues could correspond to a discoloration or fading of the red lake but more detailed analyses are needed to understand this area