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"Blue pigments, which date back 6,000 years, have been traditionally toxic and prone to fading. That’s no longer the case with YInMn, which reflects heat and absorbs UV radiation, making it cooler and more durable than pigments like cobalt blue."
https://hyperallergic.com/615971/meet-yinmn-the-first-new-shade-of-blue-in-two-centuries