Fig. 4From: Change is permanent: thoughts on the fading of cochineal-based watercolor pigmentsPlot of ΔE measured for three cochineal-based pigments on different paper supports after 70 h of light exposure. Blue alkaline paper; green neutral paper; red acidic paper; circle uncomplexed colorant, CA; rhomb aluminium-laked pigment, CA–Al; square tin-laked pigment, CA–SnBack to article page