UV inks were first commercialized when they were first applied to carton printing in the U.S. back in 1969. In Japan, it was used for metal printing and seal printing 2 years later in 1971. UV inks are characterized by inner curing, solvent-free, and powderless properties and widely being used due to better work environment, faster delivery, reduction of inventories, and space-efficiency. The purpose of this information is to ensure better understanding of UV-cured ink and the related precautions and more effective and safe application of UV printing based on its characteristics.