Counterfeiting detection pen that can be worn on users finger

摘要

A counterfeiting detection device comprises a reservoir 3 for holding liquid and a liquid dispensing nib (1, fig 2) the device can be worn on a users finger, thumb, wrist or hand; the device is preferably a ring or thimble shaped pen that includes a valve 5 to enable filling of the reservoir 3 with an iodine solution. Depositing the solution on a bank note will show whether it is real or counterfeit depending on whether the solution marks the note.