The Pick# 82b (with latent imprint) has been stuck in my head for the last few weeks. I don't know, just a feeling that I haven't investigated the note completely enough and some reservations with the capabilities of my equipment. Since I had no other 3 Karbovansti notes to compare it to I went and acquired several for a control group, they are fairly cheap for raw notes.
Upon their arrival and inspection they looked as they should, in regards to the latent imprint, under normal lighting you can faintly see the imprint. A slightly off white/tan image is just barley visible behind the image of Lybid, so far so good.
Next, UV light. I lay the notes out and see how the latent imprint "pops" under UV. Hmmm, not as clear/bright as I would have hoped.
Ok, back to the graded P# 82b. Still nothing but now I think I'm seeing the outline of the latent imprint, probably pareidolia, but the UV light did not illuminate the latent imprint as I had hoped on the raw notes. Just to clarify I'm using a 40X loupe with UV light to inspect these notes. The UV light is small so you can't flood the entire note unless you are 6" away and it's not particularly powerful. So I'm still a little skeptical and I need an upgrade anyway.
Having a few Amazon points available I pulled the trigger on a few new UV lights. One is sold by Banknote World (you can buy it direct if you want) the second is a flashlight type (I'm all set for scorpion lookout now). I haven't done a bunch of research into UV light (yet), the different bands/wavelengths, types, etc. but if anyone has some suggestions on a type of UV light to use or an article let me know.
For now the search goes on, as there is still an inkling of doubt in the back of my head on what is exactly in the PMG holder. I'm hoping a better UV source will eliminate all doubt.