Fig. 3
From: Rediscovering the colours of Elias Brenner’s pigment nomenclature from 1680

MSI shows an even distribution of azurite in the ultramarine sample (P332), which appears uniformly dark across the entire area. Mean values were taken from two 30 × 30 pixel regions: one in a visually lighter, more translucent area, and the other in a darker, more opaque region. CC-BY.