Active and intelligent elements are being widely added to packaging to increase consumer engagement and safety of the product. One such smart addition to packaging is smart ink.
Smart inks are generally of two types:
THERMOCHROMATIC INKS: They change colour when the temperature increases or decreases. This colour change is reversible and constant.
PHOTOCHROMIC INKS: They change colour on exposure to daylight (UV light). Again, this change this reversible and instantaneous.
