From Wikipedia:
To create the anti-static effect, the black or silver bags are slightly conductive
and
A device should not be powered while in an antistatic bag, because the conductivity of the bag could cause damaging short-circuits between parts of the device.
So I deduce that those bags are conductive in the interior surface. What about the exterior surface?
Best Answer
Antistatic Bags & Conductive Bags
ESD Bags: To Shield Or Not To Shield