Series of materials, initially produced in 2014 by the company NanoSystem from carbon, of the color "black black blackest" that had been created until then (in hexadecimal : 020003 ) and that can absorb up to 99 , 965% of visible light. This initiated a kind of competition that allowed other labs to improve technology to get even darker blacks. The name is an acronym for vertically Aligned NanoTube Arrays ("vertically aligned nanotube set) black ( "black" ). Artist Anish Kapoor bought the exclusive use rights to the pigment, and although the sale has a clause for artistic use, many are against the intellectual or commercial appropriation of a color.
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