Printing

Printing
Three printing processes are used one for the background, one for the main design, and another for the serial number. One process, intaglio, makes the ink stand slightly raised up from the paper – another indication that the note is genuine.
Anti-forgery elements, such as security thread, are often added to the paper used to make the banknotes.
Printing inks are mixed specially, giving the exact colors required for the note. This is another process that makes forgery difficult.
Security
A security van delivers banknotes to a bank, where they are stored in vaults for safe keeping. These are strong rooms, built for maximum security, and are usually equipped with time locks. At the end of a working day, all the cash at the counter tills is counted and returned to the vaults.
Cash machines
Cash-dispensing machines allow customers to take money from their account 24 hours a day, even while the bank is shut. Customers insert a plastic card key in a personal identification number (PIN).
The machine is connected to a computer, which contains information about the amount of money held in each person’s account, and records any transactions.
Safety deposit boxes
Banks keep their cash in strong rooms. For a free, they also keep customers' valuables, such as share certificates, in strong boxes in the strong rooms.