Question

What quality of the printing ink used in the new notes?

Answer 1

A high security ink from a Switzerland company which supplies ink for many major currencies in the world.

The ink has features for enabling detection (quick) by machines, visual recognition.  There is a color changing ink used for  the value 2000,500.. at the lower right side.. It changes from green to blue.

The ink lasts longer and is supposed to withstand rough handling.  This ink makes it extremely difficult /impossible to do counterfeiting.