Inspection Friendly IML
Invisible ink is a specialized ink that is imperceptible under normal light conditions, but is visible under specific UV-light. The transparent ink absorbs the UV-light exposed by the vision inspection system and reflects a specific wavelength so that the camera can see the image. By adding invisible ink all around the borders of the label, one can highlight the cutting edges of the label so that they become visible to the camera inspection systems. The camera can now check the position of the label on the bottom of the cup, the alignment and even blow-by can be detected. A win-win!