What’s up with this varnish?

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I started noticing weird marks on some of the circulated twenty dollar notes that were coming my way. I thought these marks with a spiky pattern looked like the varnish was being discoloured or dirt was sticking to it, until the bank machine I used today spit out a bunch of new twenties with this same mark. The new notes are as close to uncirculated as you can get so the marks can’t be a result of the varnish changing colour over time or getting dirty from being in circulation.  Any ideas?

Hear are a few of the circulated ones I kept.

{http://img231.imageshack.us/img231/6126/varnish1.jpg:http://img231.imageshack.us/img231/6126/varnish1.th.jpg}

Hear are the new ones that came from the ATM today.

{http://img833.imageshack.us/img833/7642/varnish2.jpg:http://img833.imageshack.us/img833/7642/varnish2.th.jpg}


It could be just a coincidence but all the notes with the mark I’ve seen so far are only the twenty dollar notes printed by the CBN.

I think that varnish is supposed to be there, in order to help protect the braille markings.  For your notes, it appears that the varnish has been misaligned a few millimetres to the right.

Wait, look closer you can compare it with a regular one.
The varnish is supposed to be transparent (very hard to see), but that small part of the varnish on these notes is black. That’s not normal!

{http://img9.imageshack.us/img9/5065/varnishb.jpg:http://img9.imageshack.us/img9/5065/varnishb.th.jpg}  {http://img714.imageshack.us/img714/4568/varnishc.jpg:http://img714.imageshack.us/img714/4568/varnishc.th.jpg}