| abstract |
Sports equipment, in particular balls for competition, are printed with ink which is cured with light in the visible region of the electromagnetic spectrum. Such inks include photoinitiators that absorb light in both the ultraviolet region and the visible region, both in the range of about 400 nm to about 690 nm, Type I photoinitiator compounds that absorb only light in the visible light region, Type < / RTI > photoinitiator compound to be used in combination with a free radical-curable material. |