Are you aware of the true origins of Indian Yellow? Though it was a hugely popular pigment among leading artists such as J. M. W. Turner, its source was unknown for centuries. The pigment was originally imported from Kolkata, India, in the form of soft yellow lumps in sealed packages. When these were opened at Winsor & Newton a powerful smell of ammonia was reported, but it wasn’t until the 19th century when it was revealed that the pigment was made from cow urine. This practice was outlawed in

Winsor & Newton - Cerulean Blue: Widely thought of as the...

Newton's Color Theory