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More about ghostsIt seems to me that there are a few different mechanisms that can create a ghost card. Most of the posted images of a week or so ago were a misapplication of one color layer. These were either the same card, or a different one. These cards would usually end up as scrap rather than issued in error.
A second mechanism for a ghost seems to be a transfer of wet ink from the front of a card to the back of another that was probably stacked on top of it. I'm not sure, but it seems like many of these are the black layer that may transfer to the back of another card in mirror.
Here's a card that is similar to the second ghost, but it is the Piedmont back that transferred to the front of another. I assume this is just considered a printing error.
Comments?