Why are there no faces drawn on the black heads? There were two black heads in the Star Wars 2011 advent calendar and neither had a face drawn. Is that because there was no face necessary since it was going to be covered with a mask anyway or is there a rule that the faces only go on the yellow heads?
They made them solid black so there are no alignment issues when veiwing the masked minifigures. By leaving them blank LEGO ensured the eye slots always appear black. Side note: The only Stormtroopers seen without helmets in the StarWars Movies were Han and Luke in disguise, therefore Stormtroopers are faceless.