| abstract |
PROBLEM TO BE SOLVED: To provide an aqueous active energy ray-curable ink composition excellent in curing performance by containing a water-soluble polymerizable substance exhibiting high reactivity and a water-soluble polymerization initiator exhibiting high initiation efficiency, and an ink jet using the ink composition. To provide a recording method, an ink cartridge, a recording unit, and an ink jet recording apparatus. An active energy ray-curable water-based ink composition containing at least water, a polymerizable substance that undergoes radical polymerization with active energy rays, and a polymerization initiator that generates radicals with active energy rays. An active energy ray-curable aqueous ink composition, wherein the substance is a water-soluble compound having 2 to 6 (meth) acrylic groups, and the polymerization initiator is a water-soluble acylphosphine oxide compound. An ink jet recording method, an ink cartridge, a recording unit, and an ink jet recording apparatus using the ink composition. [Selection] Figure 1 |