UV-curable inks for single pass (web) inkjet printing with low migration potential and suitable for the printing of food packaging have been developed and optimised by mixtures design-of-experiment (DOE) methodologies. The inks have acceptable cure response in air (<250 mJ/cm2) and can deliver levels of contact migratables below 10ppb (0.01mg/Kg(foodstuff)) for each migratable monomer and photoinitiator species measured in this study. The inks can be prepared at viscosities suitable for all common printheads and their performance on commercial presses has been confirmed.
Derek Illsley, Steve Hall, Sam Moncur, Damian Ward, Tom Budden, "Low Migration UV-Curable Inkjet for Food Packaging" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP29), 2013, pp 391 - 394, https://doi.org/10.2352/ISSN.2169-4451.2013.29.1.art00033_2