Fugitive Inks

Inks that easily fade or break up in water or chemicals. To counter attempts at forgery or the removal of cancellations, many governments have used fugitive inks to print stamps. Ghost Tagging: The appearance of a light impression in addition to the normal inked stamp impression. This is caused by misregistration of the phosphor tagging in relation to the ink. Sometimes, a plate number impression will have an entirely different number from the ink plate, giving the impression of an error: one dark (normal) number and one light (ghost) number.