When you squeeze that black paint from the tube, have you assumed that is the limit of blackness?
Well apparently it is not so black after all. Standard black paint still reflects about 5 -10% of the light that falls upon it.
Scientists now have developed a substance that reflects less than 0.1%.
Researchers say the new black could be applied to solar and other technologies. But in that list is also mentioned "defence" (a.k.a. war).
New Material Pushes the Boundries of Blackness – Reuters, Tue 15th Jan 2008