This extreme light-trapping effect is achieved using wing scales that are only a few microns deep, which is a fraction as thick as the blackest synthetic coatings. As little as 0.06 per cent of the light that hits them is reflected back to the eye. Scientists at Duke University in North Carolina have been studying butterflies that are naturally 10 to 100 times darker than charcoal, fresh asphalt, black velvet and other everyday black objects. Progressively darker materials have been developed by scientists over the last decade, such as the accidental discovery of Vantablack in 20’s carbon nanotube-based material, which is 10 times blacker than anything made before it.
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