Why Artists Might Not Want Vantablack Anyway (Yet)
So it looks like some artist has got a monopoly on the use of vantablack for artistic purposes. This has annoyed a lot of other artists. However this article talks about some of the problems with Vantablack, including some significant health risks.
These will probably slow down any commercial releases of the stuff, for those wanting to experiment.
Some highlights include:
"Vantablack’s nanotubules can come loose and irritate the eyes and respiratory system"
"The substance has a “specific target organ toxicity—single exposure,” which means...that it can cause “non-lethal, but reversible or irreversible damage to specific organs after contact.”
"...and it hasn’t even been fully tested."