@zak (sorry, I couldn't reply directly) That isn't Vantablack as such though, is it? Afaik, Vantablack proper requires a specific application process [1], whic

@zak (sorry, I couldn't reply directly) That isn't Vantablack as such though, is it? Afaik, Vantablack proper requires a specific application process [1], which I've mentally envisaged as being something akin to growing diamonds in a lab on a substrate, or applying flocking to materials. I'd be quite curious to know what the reflectivity would be like on some clever coating consisting of vertically-laid carbon nano tubes, etc. [1] - https://www.surreynanosystems.com/vantablack/applying-vantablack https://www.surreynanosystems.com/vantablack/applying-vantab...