Lead-tin yellow features in many paintings of the Old Masters, until about 1750. It was then replaced and forgotten until 1940. Examples in major masterpieces from Rembrandt, da Vinci, Vermeer, and others.
What turns statues and copper roofs blue-green? ‘Copper rust’, the basis of the intense green pigment Verdigris, used by all the Masters.
Used since Roman times, it was common in the dress of saints. Highly toxic, it was progressively replaced by cadmium red in the late 19th century.