Invisible inks under natural lighting conditions, with fluorescent properties under certain infra-red waives lenght.
Inks that are able to incorporate and store encoded information, then readable with specific MICR (Magnetic Ink Character Recognition) detectors. Depending on the type of information included, magnetic inks can be divided in High-Co (high-coercive) and Low-Co (low-coercive).
Colour shift inks, also called "interferencials" or "optical variables". The inks are capable of changing colour depending on the observation point and the light angle of incidence.
Inks that have a particular brightness when exposed to sunlight, giving a "pearl effect" to the printed surface and the chosen color.
Invisible inks under natural lighting conditions, with fluorescent properties under ultraviolet radiation (365nm or 254nm).