For centuries, artists sought a yellow pigment that could capture the richness of sunlight, the warmth of skin tones, and the golden glow of sacred imagery—without turning poisonous, slowly fading into a grayish brown, or muddying the canvas. The problem was simple: yellow was everywhere in nature, but hard to trap in paint. A beautiful yellow pigment could be made from the mineral orpiment, but came with a deadly side effect—it was laced with arsenic. Others, like lead-tin yellow and Naples yellow, were more stable but equally toxic. Earthy yellows, such as ochre, were safe, but far too dull to capture vibrant light or glistening fabrics.
What artists craved was a pigment that was both brilliant and reliable—something that would layer beautifully in glazes, maintain its color over time, and not kill the painter in the process. This desire only intensified during the Renaissance and Baroque periods, when oil painting flourished, and the play of light became central to artistic technique. Painters needed a yellow that could hold its own against ultramarine skies, deep crimson robes, and luminous flesh tones.
Until the 20th century, artists often worked barehanded, ate or smoked in studios, and used solvents in poorly ventilated rooms, thus, unknowingly exposing themselves to a wide variety of poisons. Caravaggio, Francisco Goya, Vincent van Gogh, Claude Monet, Paul Cézanne, Georgia O’Keeffe, Edvard Munch, and countless other artists suffered ill health because of exposure to such toxic chemicals as lead, mercury, and arsenic. Since the pigments were used in dyes for everything from clothing to food, consumers also suffered. An arsenic-laced green wallpaper may well have even led to the death of Napoleon. (No, I don’t mention Napoleon in every blog. I counted and he is only mentioned in 81 of the 825 posts. So far.)
By the end of the Renaissance, there were a few yellow pigments available but all were either highly toxic or the pigments slowly changed colors and turned dark over time.
Into this golden gap entered India Yellow—a mysterious, glowing pigment that promised just enough brilliance, transparency, and permanence to feel like an answer to centuries of frustration. The pigment could be easily mixed with linseed oil to produce a smooth oil paint, with gum arabic to make a transparent watercolor, or with an egg yolk to produce a fast-drying and durable tempera paint. Best of all, the pigment was non-toxic.
During the nineteenth century, oil painting became increasingly popular as prepared oil paints were available in tubes. Artists such as J. M. W. Turner, John Constable, and John Singer Sargent all used India Yellow in their paintings and Vincent van Gogh used India Yellow in The Starry Night.
India Yellow was a little more expensive than other yellow pigments, and slowly, there surfaced rumors that the method of production was not ethical. There were occasional news stories that said the process of gathering the pigment was cruel to cows. Finally, in 1883, T.N. Mukharji was commissioned by the British government to investigate the authenticity of the India Yellow production methods.
Mukharji reported that local producers fed cows exclusively on mango leaves, resulting in a distinctive yellow urine. This urine was collected, concentrated, and dried into foul-smelling yellow balls known as "purree," which were then exported as pigment. He noted the poor health of the cows subjected to this diet, since mango leaves are slightly toxic.
India Yellow was not the only ethically challenged pigment being sold at the time. Artists could also buy tubes of Egyptian Brown, a pigment made from grinding up the mummies of both humans and animals removed from Egyptian tombs. Several companies sold tubes labeled as “Genuine Mummy.” Or you could purchase a tube of Tyrian Purple, a rich, beautiful pigment whose production process required a quarter of a million sea snails to produce an ounce of pigment.
Happily (at least for the cows), when this report was published in English newspapers, popular sentiment grew against the use of such pigments. Within a few years, most companies no longer produced either Egyptian Brown or India Yellow. (Supposedly, Winsor & Newton buried its last stock mummy in the courtyard of its London offices.). India Yellow was replaced by new pigments such as cadmium yellow. Though some companies still produce paints labeled India Yellow, the modern synthesized pigments have nothing to do with either cows or mangos.
If you are interested, you can still buy Tyrian Purple that is made by the traditional method. A German company, Kremer Pigments, will sell you an ounce of the pigment for about $125,000, roughly 55 times more expensive than gold.