Abstract: A water-based composition may include a latex polymer having a Tg from about ?50° C. to about 20° C., or from about ?20° C. to 20° C., or from about 0° C. to 20° C., or from about 5° C. to 20° C., or from about 8° C. to 14° C. and a photoinitiator component including a Norrish type I photoinitiator and a Norrish type II photoinitiator, and optionally a crosslinking component, and optionally a siloxane-based block resistance additive. The water-based composition does not contain benzophenone and does not contain methyl-o-benzoyl benzoate.

Abstract: The present invention relates to a phosphine oxide-based photoinitiator, to a process for preparing said photoinitiator and to a precursor that may be used to prepare said photoinitiator. The present invention further relates to a photoinitiator composition, to a curable composition, to a process for the preparation of a cured product, to a process of inkjet printing, to a process of 3D printing and to a process for coating a nail. The invention also relates to precursors of the photoinitiator or the photoinitiator composition. The invention also relates to the use of the photoinitiator or the photoinitiator composition.