NY20

This extinct yellow pigment is one of those that gets mentioned when lists of outrageous pigments are given. This pigment was allegedly made by feeding cows in India a diet of mango leaves and then processing the urine to create a pigment. It's sometimes debated whether this color actually exists, or at least if it was made in the way that is commonly told and re-told. A warm transparent yellow. The color at least does in fact seem to be real--regardless as to whether there was basis in the stories told of how it was manufactured. Golden has pictures of an actual sample of genuine Indian Yellow, or Magnesium salt of euxanthic acid. A wide range of transparent yellows are available to artists, and so the name applies to a great many paints of other pigments, but the genuine pigment is fugitive.