This is a very rare Russian KGB disappearing ink spy pen based on a secret formula developed by KGB scientists during the Cold War period, and has been recently adapted into a modern gel pen format.
Despite its unique capabilities, this pen looks and writes exactly like a regular pen and
writes in a standard dark blue ink. Since it's a gel pen, it writes smoothly with a
continuous flow, and has a long shelf life. It has a popular 0.5mm point size.
It requires almost no downward pressure to write on the paper, so it's not necessary
to leave indentations on the paper that could possibly be used to reconstruct what was
Once on paper, the ink appears normal for about 15 minutes. Then it begins to slowly
deconstruct. After about an hour, it will have mostly disappeared, but will still be slightly
visible. After about 24 to 48 hours it will have completely vanished!
Even an inspection under ultraviolet light will come up with nothing.
WARNING: Do not use on any legal document or financial instrument.