what happens when the "Smudges" get smeared? (Score 2)

The article talkes about tiny "smudegs" of mineature UPC that are no larger than a U.S. penny. I'm wondering what's going to happen when the printing press smears that. I don't know about your local newspaper, but mine often has pages that are diffcult to read because if ink smears/runs/blots/etc. I would think that you'd need a very percise printing process to make this work reliably.