Can other owners please check UV activity on these

I'm interested to know whether both sides of the note have UV activity, specifically the rectangle on the reverse that shows up green under white light.

If you have other denominations, please post those also!

I have lots of these!

I am away at the moment, will be back at my desk in the second half of September. 

I will check all the examples I have of this note and see if there are any differences in them, and will post pics of anything interesting.

Which other denominations do you need images of?

I have examples of all the notes, plus replacement notes, and a few spares, which isn't many notes overall though.

I do have some spares of the 1980 10Mk note, will have a look at those also.

Ah, you can help me a lot!

If you can just check regular issue 10, 20, 50 and 100 that will be fine.

That green rectangle on the reverse absorbs IR, but doesn't do anything special under UV:

But on the obverse, the portion of the 10 that was dark under IR also fluoresces under UV:

What I suspect: the green rectangle on the reverse of my note should be fluorescing the same as the 10 on the obverse.

If that is the case then the UV ink on this note also absorbs IR light.

I checked a 20 Markkaa note from 1993 and it doesn't have the IR security feature seen on the 1986 10 Markkaa.

I got another 10 Markkaa note from 1986 and it has the dame fluorescence as my first note. So it would seem that the IR appearances are not on all the notes and they are not tied to UV appearances.

Here are a few from the bundle of spares. 365nm:

I suspect that any fluorescence in the green rectangle on the reverse may be incidental, and not intended as a uv security feature.

These notes are well circulated. Note how the degree of fluorescence varies in the rectangle on the lower left, possibly due to wear. I have seen this on other uv active notes from the 1990s which were well circulated or damaged or both.

Three more notes.

I have several examples of this note in my collection which are UNC grade, including replacements (not sure how many, notes get swapped out or sold off from time to time). I will take pics of them sometime when I remember to bring the uv torch with me to the storage.

I looked at some earlier notes, several of the 1980 series Paasikivi 10 Mk which is the nearest issue to these blue Paavo Nuurmi 10 Mk notes.

There are two different issues of the 10 Mk note, those with old style serial numbers and those with new style serial numbers (used on the blue 10 Mk). There is no UV activity on any of the old design 10 Mk notes, making this blue 10 Mk the first Finnish note to contain UV activity, as far as I know.

Thanks - it looks like it is then normal for that rectangle not to fluoresce.