I imagine - and this is just guessing - that the process actually works in two parts. Initially an item passes through get a first stage UV-active phosphorescent marker applied, uniquely indentifying the package and taking a picture of it for OCR and/or manual reading. Then, a little while later, it goes through a second stage, at which point the first-stage marker is read, and a second stage marker with the actual addressing information in it is applied.
Anything reaching the second stage too early can be routed back to the holding stage.
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Date: 2006-01-31 23:00 (UTC)Anything reaching the second stage too early can be routed back to the holding stage.