Scientists have identified the origins of the blue color in one of Jackson Pollock's paintings with a little help from chemistry, confirming for the first time that the abstract expressionist used a vibrant, synthetic pigment known as manganese blue.

"Number 1A, 1948," showcases Pollock's classic style: paint has been dripped and splattered across the canvas, creating a vivid, multicolored work. Pollock even gave the piece a personal touch, adding his handprints near the top.

The painting, currently on display at the Museum of Modern Art in New York, is almost 9 feet wide. Scientists had previously characterized the reds and yellows splattered across the canvas, but the source of the rich turquoise blue proved elusive.

David Brenneman, director of collections and exhibitions at the

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