Currency degradation systems include smoke generators (Dye Packs) and ink spraying systems activated by Piston Actuators
Dye Packs have been employed for years to thwart bank robberies. The dye pack system is hidden inside of an authentic appearing phony stack of currency. If the thief remains inside the bank the dye pack system will not activate. But once outside, the system will activate, and the dye pack will evolve a voluminous cloud of aerosolized dye which acts as a visual aid to locate the thief and stain any valid currency also stolen rendering it useless. Some may be equipped with tear gas which also serves to immobilize the perpetrator.
ATM machines are protected using an ink spraying system powered by compressed gas. If someone tries to steal the ATM machine, a detection system will electrically initiate a piston actuator which deploys a small metal punch which punctures the metal seal disc of a small carbon dioxide cartridge releasing the gas pressure to power the ink spray, staining the currency inside the ATM rendering it useless.