Ultraviolet (UV) curable inks, varnishes and lacquers are composed of liquid components which co-polymerize to a plastic solid when exposed to a high intensity UV light source. Less frequently, an electron beam (EB) is used. UV cured inks can effectively be considered solvent free, however solvents are still used for press wash-up. Health, safety and environmental precautions for both UV and EB cured processes are similar.