Goznak - Nature 2022

Goznak souvenir note set released in 2022. These were released as a set of four notes in a folder. This is the outside of the folder: 

This is the inside with the two panels folded over the notes within:

When opened, the inside can be seen to have four panels, each one having a plastic pouch for one note. Each note represents one of the four seasons. The sequence in the below photo is spring, summer, autumn and winter. These are the reverse sides of the notes:

Each note has a similar obverse with a tiger's head, but if you look at them one by one there are colour differences and subtle plant shading differences to match the seasons depicted.

The reverse of each note has obvious changes depending what season is being shown, but the constant feature is the sandthorn plant.

The spring note:

The summer note:

The autumn note:

The winter note:

The notes were printed with specialised UV-reactive ink. Unlike other notes, the colours on the reverse fluoresce in a vibrant manner whether activated by UVA or UVC.

UV activity at 365nm:

UV activity at 254nm:

The obverse of each note has ink that has differing appearances under reflected infrared imaging at 850nm vs 940nm. 

Cropped portion of the obverse under 850nm:

Cropped portion of the obverse under 940nm:

© Brandon Bertolli

There are numerous other security features which can be seen on the Goznak site here:

GOZNAK | Products | Souvenir banknotes | "Nature 2022" banknotes

Also, these notes have anti-Stokes fluorescence which can be revealed by an infrared beam at 980nm. It is present on both sides of the note.