I DON'T UNDERSTAND.
Do they mean the amount of ink a fingerprint uses??? fingerprints can be made of many things! usually skin oils. puke!
For me, that sentence is like a zen koan. It makes me try to imagine a fingerprint that exists on its own, floating in the air, made out of... WHAT? Made of whatever the universe is expanding into, or the sound of a tree no one hears fall, I guess.