Fig. 5From: The influence of light and relative humidity on the formation of epsomite in cadmium yellow and French ultramarine modern oil paintsNormalised XPS spectra for CY paint samples on oil primed canvas aged at 50% RH and 75% RH with ambient light and elevated light conditions respectively, left to right, for environments: a C 1s; b O 1s; c Mg 1s; d S 2p; e Cd 3dBack to article page