How special bank note paper is made
The Lanquart Paper Mill in south eastern Switzerland has been making security and speciality paper for more than 100 years.
It is the only mill in the world that makes the paper that is used for the Swiss franc.
Once the paper is produced it is sent - surrounded by high security - to other factories where the currency notes are then printed.
Marco Ziethen, the production manager at Landquart showed the BBC how it makes money.