A Wet Trap Error from the Polymer series and a nice one too.
Use the link I’m sure what you find can show you how the extra ink you’re questioning on your note got there and you’ll see examples of how excessive amounts of ink on printing plates can create some cool errors.
http://www.cdnpapermoney.com/forum/index.php?topic=2352.0Another possible cause of extra ink being printed in error is a printing calliper not being set correctly. Using too much pressure from the plates will also affect the print quality.
An explanation for what you called an aura around Borden could have been caused by how either extra ink on the plates or high pressure has affected the trap or trapping. Trap on a press is the ability of printed ink to accept the next printed ink and how well paper accepts that ink or in your case how well polymer accepts it.
Even very small miss-registration between multiple colours causes gaps/spaces. Trapping is used in prepress creating overlaps to compensate for any minor miss-registration between colours.
Just for fun here are three consecutive notes of mine from the Journey series with this error.