Well, it's close to printing money. Stamps have value and need to be validatable...
The fact that they have the on demand technology to print a fraud protected stamp with an adhoc image is impressive, and opens up all sorts of possibilities, including if you think further... personalised money.
(no subject)
The fact that they have the on demand technology to print a fraud protected stamp with an adhoc image is impressive, and opens up all sorts of possibilities, including if you think further... personalised money.